Solid Polymer Derived From Ethylenic Reactants Only Derived From Unsaturated Hydrocarbon Patents (Class 525/177)
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Patent number: 5550190Abstract: The composition of the present invention is a thermoplastic elastomer composition obtained by dynamically crosslinking (A) 51-95% by weight of a thermoplastic polyester elastomer and (B) 49-5% by weight of a rubber during kneading. The composition is excellent in all of hardness, tensile strength, tensile elongation, compression set, thermal aging resistance, oil resistance and molded product appearance, and is suitably used as a material for automobile parts such as joint boot and the like.Type: GrantFiled: March 27, 1992Date of Patent: August 27, 1996Assignees: Japan Synthetic Rubber Co., Ltd., NTN CorporationInventors: Ko Hasegawa, Toshio Teramoto, Tatsuo Nakajima, Takeyoshi Konomoto
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Patent number: 5545686Abstract: This invention discloses a rubber composition having a high modulus and excellent processability which is comprised of a blend of (1) at least one elastomer selected from the group consisting of polybutadiene rubber, styrene-butadiene rubber, synthetic polyisoprene rubber, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, carboxylated nitrile rubber, and EPDM rubber, (2) at least one thermotropic liquid crystalline polymer containing an aliphatic spacer, wherein the thermotropic liquid crystalline polymer exhibits no apparent crystalline to nematic transition, wherein the thermotropic liquid crystalline polymer exhibits nematic order above its glass transition temperature, and wherein the glass transition temperature of the thermotropic liquid crystalline polymer is within the range of 20.degree. C. to 180.degree. C., and (3) carbon black.Type: GrantFiled: October 3, 1994Date of Patent: August 13, 1996Assignee: The Goodyear Tire & Rubber CompanyInventors: John D. Carter, Richard R. Smith
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Patent number: 5541259Abstract: Resin compositions having excellent heat resistance, izod impact strength, rigidity and dimensional resistance and the like, applied in the fields of the automobile, electric and electronic, and the like industries. The resin composition comprising: a) a resin in which 30 to 98 mole % of the component (I) are contained in the whole polymer and 70 to 2 mole % of the component (II) are contained in the whole polymer, its weight-average molecular weight converted into that of polystyrene being 1.times.10.sup.3 or more to 5.times.10.sup.6 or less, and b) an olefin resin; then the a)/b) content being 5/95 to 99/1 as a weight ratio, ##STR1## wherein R.sub.1 is an alkyl group having 1 to 18 carbon atom(s) or a cycloalkyl group having 3 to 12 carbon atoms; and ##STR2## wherein R.sub.2 is hydrogen or an alkyl group having 1 to 8 carbon atom(s), and R.sub.3 and R.sub.4 is an alkyl group having 1 to 8 carbon atoms.Type: GrantFiled: June 21, 1994Date of Patent: July 30, 1996Assignee: Tosoh CorporationInventor: Toru Doi
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Patent number: 5539052Abstract: A crosslinked thermoplastic elastomer blend prepared by the process comprising blending together:(a) a thermoplastic resin containing at least three alternating blocks:A.sub.x --B--A.sub.xwherein A is a block of at least one polymerized unsaturated ethylene monomer of the following formula:--CH.sub.2 --C(R.sub.1)(R.sub.2)--wherein R.sub.1 and R.sub.2 are each a hydrogen, alkyl or aromatic group, provided that when one of R.sub.1 or R.sub.2 is a hydrogen or an alkyl group, the other R group is an aromatic group; andwherein B is a block of a polymer or copolymer containing at least one conjugated diene monomer in polymerized form, having at least four (4) carbon atoms and the following formula for the residual double bond in the diene after polymerization:--C(R.sub.3)(R.sub.4)--C(R.sub.5).dbd.C(R.sub.6)--C(R.sub.7)(R.sub.8)--wherein R.sub.3 -R.sub.Type: GrantFiled: February 3, 1995Date of Patent: July 23, 1996Assignee: Surprenant Cable Corp.Inventors: Tsu-chia Shieh, William A. Nicoll
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Patent number: 5514472Abstract: The dirt-repellent monofilament with a toughness of at least 36 cN/tex and an extension of under 44% has a soiling index A1>2 after five soiling and cleaning cycles. To manufacture the dirt-repellent monofilaments, a copolymer with a melting point of 255.degree. to 275.degree. C. and consisting of alkenes and perfluoroalkenes is added to a polymer melt of polythylene terephthalate before extrusion. The dirt-repellent monofilament is advantageously used in the manufacture of cleaning filters for the dry section of a paper machine, i.e. paper machine fabric filters. It may also be used to produce fabrics for general use as technical fabrics which have to be cleaned in difficult conditions.Type: GrantFiled: August 10, 1995Date of Patent: May 7, 1996Assignee: Rhone-Poulenc Viscosuisse S.A.Inventors: Halim Baris, Erwin Lerch
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Patent number: 5506300Abstract: The present invention provides a composition that softens at a predetermined temperature, preferably between about 20.degree. C. and 90.degree. C., and more preferably between about 20.degree. C. and about 62.degree. C., comprising at least one block copolymer having at least two thermal transition temperatures. The composition is characterized by at least two thermal transition temperatures, one of which is a predetermined lower transition temperature, preferably between about 20.degree. C. to 90.degree. C., and more preferably between about 20.degree. C. to about 62.degree. C., and one of which is an upper transition temperature. The present invention also provides a method of making the composition, a method of making biomedical materials and articles, and toys and toy components, with shape-memory properties from the composition, and biomedical materials and articles, and toys and toy components, with shape-memory properties made from the composition.Type: GrantFiled: February 18, 1993Date of Patent: April 9, 1996Assignee: Thoratec Laboratories CorporationInventors: Robert S. Ward, Judy S. Riffle
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Patent number: 5502160Abstract: The invention provides melt-spun polyolefin/polyarylate alloy fibers having an elevated softening point. These fibers are useful in staple lengths for the reinforcement of synthetic geoways (e.g., roadways, runways), especially those fabricated from asphalt-based pavements. The improved softening point of the fibers allows their incorporation into the hot-mix pavement used to fabricate and repair such surfaces without degradation of the fibers by the elevated temperatures found in plants for these manufacture of hot-mix pavements. This invention also provides an improved process for making melts of such allows.Type: GrantFiled: August 3, 1994Date of Patent: March 26, 1996Assignee: Hercules IncorporatedInventor: James P. Modrak
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Patent number: 5496888Abstract: Resin compositions, comprising (A) a styrene/acrylic polymer and (B) a polyester dispersed therein with an average particle size of not more than 3 .mu., are obtained by quenching a mixture of (A) and (B) melted at 150.degree.-200.degree. C., below the glass transition temperature of the polymer (A) within 5 minutes, and are of good thermal shelf stability and electrical properties and provide toner binders of high hot offset causing temperature and improved low temperature fixing properties.Type: GrantFiled: March 15, 1994Date of Patent: March 5, 1996Assignee: Sanyo Chemical Industries, Ltd.Inventors: Masaharu Nishida, Tohru Ohhama
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Patent number: 5472818Abstract: Spherical resin particles having a sharp particle size distribution and a method for producing such particles are disclosed. Resin particles according to this invention contain at least a polyester polymer and a polymer formed from a polymerizable monomer, and have an average diameter (D) of 1 to 500 .mu.m. At least 70% by weight of the particles have a diameter in the range of 0.5 D to 2.0 D. Such resin particles can be produced by swelling polyester-containing seed particles with a polymerizable monomer and then polymerizing the polymerizable monomer in swelled seed particles.Type: GrantFiled: October 6, 1994Date of Patent: December 5, 1995Assignee: Toyo Boseki Kabushiki KaishaInventors: Yasunari Hotta, Satoshi Maeda, Yozo Yamada, Shinichiro Mori, Toshio Tanaka, Koji Tanaka, Hiroshi Ono
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Patent number: 5472780Abstract: The soil-repellent monofilament for paper machine wire-cloths consists of at least 85% by weight of polyethylene terephthalate having a viscosity index (V.I.) of at least 96 dl/g and an added copolymer prepared from alkenes and perfluoroalkenes having a melting point from 255.degree. to 275.degree. C. To make the soil-repellent monofilament 1.5 to 5% by weight of tetrafluoroethylene is included by addition to the polymer melt of polyethylene terephthalate prior to extrusion. The soil-repellent monofilament produced by this method has a soiling index of <2 after 5 soiling and cleaning cycles.Type: GrantFiled: April 29, 1994Date of Patent: December 5, 1995Assignee: Rhone-Poulenc Viscosuisse SAInventors: Halim Baris, Erwin Lerch
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Patent number: 5449722Abstract: Disclosed is a thermoplastic resin composition comprising:30 to 97% by weight of at least one of (a) a crystalline thermoplastic resin component and (b) a non-crystalline thermoplastic resin component, 3 to 70% by weight of (c) a rubbery polymer component which is ununiformly mixed with at least one of Component (a) and Component (b) and 0 to 40% by weight of (d) an inorganic filler,wherein Component (c) forms a network and at least one of the ratio of flexural modulus of Component (a) to Component (c) and that of Component (b) to Component (c) is 5 or more.Type: GrantFiled: March 18, 1994Date of Patent: September 12, 1995Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Koji Nishida, Kiyoji Takagi, Hironari Sano, Motohiro Seki
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Patent number: 5447991Abstract: Polyolefinic fibres and films are made flame-resistant by the addition of a flame-resistant additive made up of a copolyester containing units deriving from: a) terephthalic acid; b) alkylenic glycol (C.sub.2 --C.sub.6) ; and c) phenyl hydroxymethylene phosphinic acid.These fibres and films are prepared by the transformation into its molten state of a mixture of polyolefin and flame-resistant additive.Type: GrantFiled: May 12, 1994Date of Patent: September 5, 1995Assignee: Enichem Synthesis S.p.A.Inventors: Gianluigi Landoni, Carlo Neri
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Patent number: 5415943Abstract: Wood composite materials containing veneer layers interposed with a thermoplastic adhesive containing a polyester such as polyethylene terephthalate and other thermoplastic polymer show increased impact resistance. The composite material may be manufactured using an adhesive transfer method or film extrusion.Type: GrantFiled: March 2, 1993Date of Patent: May 16, 1995Assignee: American Research Corporation of VirginiaInventors: Howard P. Groger, Frederick A. Kamke, Russell J. Churchill
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Patent number: 5407736Abstract: A polyester monofilament which exhibits improved abrasion resistance and is formed from the extrusion of a polymer blend of a polyester resin and a melt extruded fluoropolymer resin. The monofilament exhibits an improved resistance to abrasion as compared to standard high temperature polyester monofilament.Type: GrantFiled: August 12, 1993Date of Patent: April 18, 1995Assignee: Shakespeare CompanyInventor: Timothy E. McKeon
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Patent number: 5397610Abstract: A plastic molding produced by molding a resin composition comprising 98 to 50 parts by weight of a thermoplastic polyester resin (A) and 2 to 50 parts by weight of a resin (B) incompatible with the thermoplastic polyester resin (A), the resin (B) being dispersed in the resin (A), wherein the resin (B) has in a layer that is situated at an arbitrary depth from the outer surface of the plastic molding a substantially rodlike form satisfying the requirement represented by the following formulae (1) and (2) and is oriented in parallel to the outer surface of the plastic molding and in the direction of flow of the resin composition in molding:1.ltoreq.P/Q.ltoreq.10 (1)(P+Q)/L.ltoreq.0.5 (2)wherein L, P and Q represent the size of the particle of said resin (B) and respectively have the following values:L: the average length (.mu.m) in the direction of stretching of the particle;P: the average major axis (.mu.Type: GrantFiled: January 29, 1993Date of Patent: March 14, 1995Assignee: Kao CorporationInventors: Shingo Odajima, Shoji Ohtani, Tetsuhiro Osawa, Masanori Takita, Yukihiro Nakano
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Patent number: 5395890Abstract: A styrene-based resin composition containing (A) a styrene-based resin with mainly syndiotactic configuration and (B) a thermoplastic resin other than the styrene-based resin exhibit excellent heat resistance and impact resistance. Optionally, the styrene-based resin composition may further contain (C) a rubber polymer and/or (D) an inorganic filler. More particularly, a composition containing 1-98% by weight (A) 1-98% by weight of a styrene-based resin with mainly syndiotactic configuration and 1-98% by weight (B) a polyethylene terephthalate resin or a polyester resin is disclosed.Type: GrantFiled: April 17, 1990Date of Patent: March 7, 1995Assignee: Idemitsu Kosan Co., Ltd.Inventors: Akikazu Nakano, Takashi Sumitomo, Keisuke Funaki, Toshikazu Ijitsu, Michihiro Sawada, Masahiko Kuramoto, Masakazu Suzuki
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Patent number: 5382628Abstract: The present invention relates to thermoformed plastic articles such as frozen food trays which exhibit unexpectedly high impact strength at low temperatures. The articles are obtained from polyester blends containing 88 to 99 weight percent of a poly(ethylene terephthalate) resin and 1 to 12 weight percent of a poly(1,4-cyclohexylenedimethylene terephthalate) resin which contains at least 30 mole percent of 1,4-cyclohexanedimethanol.Type: GrantFiled: February 28, 1994Date of Patent: January 17, 1995Assignee: Eastman Chemical CompanyInventors: Jennifer L. Stewart, Emily T. Bell
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Patent number: 5376711Abstract: A poly(ethylene 2,6-naphthalate) film obtained by stretching a poly(ethylene 2,6-naphthalate) sheet containing cross-linked polymer particles which have at least one ethylene glycol unit and have an average particle size of from 0.05 to 3 .mu.m and a spherical ratio of from 1.0 to 1.1, wherein a deformation ratio of the cross-linked polymer particles in the stretching is from 1.2 to 3.0, has excellent runnability, abrasive resistance and strength.Type: GrantFiled: March 24, 1993Date of Patent: December 27, 1994Assignee: Diafoil Hoechst Company, LimitedInventors: Masahiko Fujimoto, Kazuhiro Kunugihara
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Patent number: 5372879Abstract: The present invention provides a biaxially oriented polyester film made of a polyester containing 0.01 to 5% by weight of crosslinked polymer particles characterized by:(1) having a particle size distribution ratio (.gamma.) of 1.3 to 3.5,(2) having an average particle diameter of 0.1 to 2 .mu.m,(3) having a non-circularity of 3.4 or more, and(4) having a standard deviation of noncircularity, of at least 0.16.The polyester film of the present invention has a flat surface having a small number of large protuberances, excellent running property and excellent winding property, and can be produced economically. The film has excellent properties for use as a base for various magnetic recording media.Type: GrantFiled: February 18, 1994Date of Patent: December 13, 1994Assignee: Teijin LimitedInventors: Makoto Handa, Tomoyuki Kishino
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Patent number: 5367025Abstract: A crosslinkable polyethylene-based composition useful for rotational molding and, when cured, beneficially characterized by exceptional percent elongation after long term exposure to degradation conditions, is provided. The composition advantageously includes a polyalkylene terephthalate as a polymeric additive.Type: GrantFiled: October 29, 1993Date of Patent: November 22, 1994Assignee: Wedtech, (USA) Inc.Inventor: Donald G. Needham
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Patent number: 5364905Abstract: A continuous method for the in-situ polymerization of plastic in an elastomeric material in a form suitable for reinforcing the elastomeric material is provided. The method comprises feeding elastomer and a monomer or monomer precursor of a reinforcing material into a mixing device, mixing the elastomer and the monomer or monomer precursor vigorously, initiating polymerization, and causing the monomers to continue to polymerize until the polymer solidifies when the melting point of the polymer produced exceeds the mixing temperature of the elastomer, terminating polymerization.Type: GrantFiled: April 26, 1991Date of Patent: November 15, 1994Assignee: The Goodyear Tire & Rubber CompanyInventors: Richard G. Bauer, Donald J. Burlett, Joseph W. Miller, Jr., Gordon R. Schorr, Pradeep M. Bapat
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Patent number: 5361818Abstract: The present invention relates to polymeric alloys which comprise the reaction product of a mixture of:(a) a polyester resin produced from the precondensation reaction of a diol and a dicarboxylic compound, said polyester subsequently condensed and having an intrinsic viscosity from about 0.13 to about 0.35 dl/g, a glass transition temperature of at least 50.degree. C., an acid number from about 5 to 50;(b) at least one polyepoxide having at least two epoxy groups per molecule; and(c) an unvulcanized rubber.Type: GrantFiled: September 27, 1993Date of Patent: November 8, 1994Assignee: The Goodyear Tire & Rubber CompanyInventors: Deborah A. Tung, Thomas J. Segatta, John J. A. Verthe, Paul H. Sandstrom, Richard G. Bauer, Mark A. Marinko
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Patent number: 5349007Abstract: Lightweight polyester resin molding compositions include a melt-blend of (A) between 97 to 20 parts by weight, based on 100 parts by weight of the total composition weight, of a polyester base resin, (B) between 3 to 80 parts by weight, based on 100 parts by weight of the total composition weight, of a polyolefin resin, (C) between 0.1 to 15 parts by weight, based on 100 parts by weight of the total composition weight, of a compatibilizing compound having a carbon-carbon double bond and an epoxy group in its molecule, (D) between 0.1 to 20% by weight, based on the weight of the compatibilizing compound, of a free radical initiator, and optionally, (E) up to 120 parts by weight, based on 100 parts by weight of the total composition, of a filler material. The free radical initiator is at least one compound having a one-minute half-life temperature of 130.degree. C.Type: GrantFiled: July 1, 1993Date of Patent: September 20, 1994Assignees: Polyplastics Co., Ltd., Takeda Chemical Industries, Ltd.Inventors: Hajime Serizawa, Masaru Kubota, Hiroyuki Sano, Yoshihisa Tajima
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Patent number: 5342893Abstract: A thermosetting powder coating composition containing a solid saturated thermosetting polyester having an acid value of at least 25 and a glass transition temperature (Tg) of at least 45.degree. C. and a curing agent such as a hydroxyalkyl amide capable of reacting with carboxylic acid groups of the polyester additionally contains, as an anti-popping agent, a thermoplastic polymer which i) is solid, ii) has a Tg of 30.degree.-100.degree. C., iii) comprises, at least mainly, units derived from at least one alkyl acrylate or alkacrylate and iv) has an acid value of no more than 10.Type: GrantFiled: March 10, 1993Date of Patent: August 30, 1994Assignee: Scott Bader Company LimitedInventors: Roy R. Wilkinson, Anthony Phillips
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Patent number: 5318871Abstract: A toner for electrophotography obtained by melting and kneading a kneaded material prepared by melting and kneading a domain resin and a coloring agent, a matrix resin having a low compatibility with the domain resin, and a dispersion assistant having a compatibility with both of the domain resin and matrix resin and a Izod impact value higher than the matrix resin to obtain a colored composition, followed by pulverizing and classifying the colored composition.Type: GrantFiled: April 14, 1992Date of Patent: June 7, 1994Assignees: Minolta Camera Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd.Inventors: Sanji Inagaki, Shoichi Tsuge, Mineyuki Sako, Kenzo Toya, Yasuhiro Terunuma, Yukako Oya, Michio Ohmori
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Patent number: 5314948Abstract: Thermoplastic polyester, copolyester and polyblend molding compositions impact-modified by glycidyl methacrylate grafted EPDM exhibit high impact strength combined with good knit-line characteristics, when the grafted comonomer content exceeds 2 percent by weight in the impact modifier, it has a gel content in the range of from about 10 to about 80 weight percent.Type: GrantFiled: June 24, 1991Date of Patent: May 24, 1994Assignees: Copolymer Rubber, Chemical CorporationInventors: Charles F. Pratt, Shrikant V. Phadke, Errol Olivier
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Patent number: 5306785Abstract: Compositions are provided which comprise a polyester resin which comprises the reaction product of at least one straight chain, branched, or cycloaliphatic C.sub.2 -C.sub.10 alkane diol or chemical equivalent thereof; and a cycloaliphatic diacid or chemical equivalent thereof; and a poly(ether ester) elastomer, a poly(etherimide ester) elastomer, a copolymer elastomer comprising (ether ester) monomers and (etherimide ester) monomers, a copolymer comprising ethylene and one or more comonomers copolymerizable therewith to provide a solid copolymer, or a combination of any of the foregoing. These compositions have excellent tensile properties.Type: GrantFiled: October 5, 1992Date of Patent: April 26, 1994Assignee: General Electric CompanyInventors: Willem F. H. Borman, Nan-I Liu
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Patent number: 5298560Abstract: A partially crosslinked thermoplastic resin composition is prepared by dynamically heat-treating a thermoplastic resin (A) in the presence of a carbon radical inducing agent (B) comprising a charge transfer complex or a combination of a hydrogen donating compound and a hydrogen accepting compound.Type: GrantFiled: May 14, 1991Date of Patent: March 29, 1994Assignee: Nippon Petrochemicals Company, LimitedInventors: Fuyuki Aida, Masaaki Miyazaki, Mamoru Nagai
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Patent number: 5283291Abstract: It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for preparing high modulus rubber compositions. By utilizing this technique, high modulus can be attained without sacrificing other properties, such as processability. The subject invention more specifically relates to a process for preparing a high modulus rubber composition which comprises: (1) polymerizing at least one diacid or diacid halide with at least one member selected from the group consisting of diols and diamines in a polymer cement of a rubbery elastomer under conditions which result in the formation of a rubber cement having a polyester or a polyamide dispersed therein; and (2) recovering the high modulus rubber composition from the rubber cement. It is highly desirable to make the high modulus rubber composition by interfacial polymerization.Type: GrantFiled: June 19, 1991Date of Patent: February 1, 1994Assignee: The Goodyear Tire & Rubber CompanyInventors: Bruce R. Hahn, Wen-Liang Hsu, Douglas D. Callander, Adel F. Halasa
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Patent number: 5281668Abstract: A thermoplastic resin composition comprising100 parts by weight of a resin mixture comprising(A) 5-95% by weight of polyolefin and(B) 95-5% by weight of polyester and/or polyamide, and(C) 1-20 parts by weight of chlorinated polyethylene incorporated into the resin mixture.Type: GrantFiled: July 25, 1991Date of Patent: January 25, 1994Assignee: Sumitomo Bakelite Company LimitedInventors: Richard Heggs, Carol Geary
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Patent number: 5281669Abstract: Intimate blends of macrocyclic oligomer compositions, such as cyclic polycarbonate or poly(alkylene dicarboxylate) oligomer mixtures, are blended with linear polymers, especially addition polymers. The blends flow easily and are frequently homogeneous. The macrocyclic oligomers therein may be polymerized to produce resin blends having advantageous properties.Type: GrantFiled: April 13, 1992Date of Patent: January 25, 1994Assignee: General Electric CompanyInventors: Roger P. Kambour, Warren L. Nachlis, Eric J. Pearce, Jeffrey D. Carbeck
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Patent number: 5280071Abstract: The present invention relates to a composition which exhibits antiozonant activity in diene containing rubbers comprising the reaction product of a multi-step process comprising:(1) reacting under condensation conditions an aldehyde and an amine containing compound to form a condensation product, whereinsaid aldehyde is selected from the group consisting of formaldehyde, acetaldehyde or mixtures thereof; andsaid amine containing compound is selected from the group consisting of:N,N'-di-substituted-p-phenylene diamines of the structural formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently selected from the group of radicals consisting of alkyls having 3 to 12 carbon atoms, aryls having 6 to 12 carbon atoms and aralkyls having 7 to 12 carbon atoms; and wherein said condensation conditions include:(i) the presence of an acid catalyst,(ii) a mole ratio of aldehyde to amine containing compound ranging from about 1.Type: GrantFiled: April 5, 1991Date of Patent: January 18, 1994Assignee: The Goodyear Tire & Rubber CompanyInventors: Budd H. Sturm, Joseph A. Kuczkowski, Paul H. Sandstrom, George F. Balogh
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Patent number: 5264491Abstract: Compatibilizing agents suitable for blending otherwise immiscible polymers comprise a block or graft copolymer in which at least one of the block segments is formed by a living anionic polymerization and thereafter chemically converted to provide a polymer having at least one functional end group. The functional groups of the polymer blocks thus formed are reacted with a functionalized monomer, or an oligomer to provide a second block polymer segment. Compatibilizing agents containing more than two blocks may be formed in similar fashion. The compatibilizing agents are used to provide uniform blends of polar and non-polar polymers having superior uniformity and other physical properties.Type: GrantFiled: August 26, 1992Date of Patent: November 23, 1993Assignee: Edison Polymer Innovation CorporationInventor: Roderic P. Quirk
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Patent number: 5260380Abstract: A self-reinforced polymer composite in the form of a non-laminated shaped article is prepared by (a) melt blending (I) a matrix polymer which is a melt processable flexible chain polymer or first liquid crystal polymer (LCP) and (2) a fiber forming melt processable second LCP under high strain mixing conditions inducing fiber formation, cooling and stretching the resulting blend, and (b) shaping the resulting blend by injection molding or extrusion at a temperature which is above the minimum melt processing temperature of the matrix polymer but below that of the fiber forming second LCP. By shaping at a temperature below the minimum processing temperature of the fiber-forming LCP, the fiber structure formed during cooling is preserved. The resulting shaped articles have outstanding mechanical properties, e./g., tensile strength, modulus and impact strength.Type: GrantFiled: January 23, 1992Date of Patent: November 9, 1993Assignee: The University of AkronInventor: Avraam Isayev
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Patent number: 5256735Abstract: A process is disclosed for the preparation of aromatic polyester-polystyrene block copolymers by solution polycondensation of styrene polymers (A) having terminal functional groups reactive with acid halide or hydroxyl groups, aromatic dihydroxy compounds (B), and aromatic dicarboxylic acid dihalides (C) at (A)/[(B)+(C)] (by weight) of 5/95 to 80/20 and the polymers are suitable as molding materials for optical instruments for their good transparency, particularly low birefringence, low melt viscosity, and good mechanical strength.Type: GrantFiled: October 17, 1991Date of Patent: October 26, 1993Assignees: Nippon Steel Corporation, Nippon Steel Chemical Co., Ltd.Inventors: Hiroshi Ohishi, Masao Kimura, Shinji Inaba, Masanao Kawabe
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Patent number: 5244972Abstract: A molding composition having improved toughness and impact strength comprising 60-90 percent by weight of a matrix resin in the form of a polyester or polyamide resin, reacted with 40-10 percent by weight of a rubber formed by copolymerization of ethylene, one or more mono-olefins, and preferably one or more polyenes, and an ester of an alpha, beta-unsaturated acid having an epoxide functionality on the alkoxy portion. The composition is prepared by forming a masterbatch containing the backbone rubber, a monomer having the epoxide functionality, a catalyst and a portion of the matrix resin of the final composition in a single step bulk process, and thereafter blending the masterbatch with the remainder of the matrix resin.Type: GrantFiled: August 7, 1990Date of Patent: September 14, 1993Assignee: General Electric CompanyInventor: Shrikant V. Phadke
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Patent number: 5232977Abstract: It is often desirable to increase the modulus of rubbers which are utilized in manufacturing a wide variety of articles. For instance, carbon black is frequently added to rubbers to increase the modulus thereof. However, the incorporation of fillers, such as carbon black, into rubbers typically results in the rubber being more difficult to process. This invention discloses the incorporation of certain thermotropic liquid crystalline polymers into rubbers in order to improve the processability of the rubber and also to increase the modulus thereof. This invention specifically discloses a rubber composition having a high modulus and excellent processability which is comprised of a blend of (1) at least one elastomer, and (2) from about 2 phr to about 40 phr of at least one thermotropic liquid crystalline polymer containing an aliphatic spacer which has a crystalline to nematic transition at a temperature which is within the range of about 110.degree. C. to about 180.degree. C.Type: GrantFiled: February 7, 1991Date of Patent: August 3, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: John D. Carter, Richard R. Smith
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Patent number: 5231137Abstract: Novel grafted polymers having backbones formed from unsaturated monomers and having pendent isocyanate containing sidechains derived from isopropenyl-alpha,alpha-dimethylbenzyl isocyanate or copolymers thereof are described.Curable coating and molding compositions employing the novel grafted polymers of the invention in combination with isocyanate reactive materials are also described.Type: GrantFiled: August 17, 1992Date of Patent: July 27, 1993Assignee: American Cyanamid CompanyInventors: Michael M. Fisher, Leroy A. White, Howard R. Lucas
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Patent number: 5225490Abstract: Biodisintegrable thermoplastic resin moldings and a process for producing same are disclosed, the biodisintegrable thermoplastic resin moldings being comprised of a thermoplastic aliphatic polyester resin as a matrix resin having dispersed therein an other type of thermoplastic resin in a proportion of 40-75 weight % based on the whole resin. The biodisintegrable thermoplastic resin moldings is easily disintegrable after disposal in an environment where microorganisms exist so that the moldings can be reduced in bulkness and give no harmful effect on the life of natural plants and animals. Thus, the present invention affords an effective means for solving various problems in the treatment of disposed plastic articles.Type: GrantFiled: November 7, 1990Date of Patent: July 6, 1993Assignees: Director-General of Agency of Industrial Science and Technology, JSP CorporationInventors: Yutaka Tokiwa, Akira Iwamoto, Kiyoshi Takeda
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Patent number: 5216079Abstract: Lubricant systems are provided in which a polyolefin or polyolefin/polytetrafluoroethylene blend functions as a lubricant in a polymer matrix material. The resulting polymer composites containing about 1 to 30 weight percent of the novel lubricant or lubricant blend have greatly improved friction and wear properties, including lower coefficients of friction and increased surface wear resistence. The polyolefin does not remain as discrete, identifiable particles after mixing with the polymer matrix, and has an average molecular weight of less than 500,000.Type: GrantFiled: February 23, 1990Date of Patent: June 1, 1993Assignee: Kawasaki LNP Inc.Inventors: Jane M. Crosby, John E. Theberge
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Patent number: 5202384Abstract: It is often desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for modifying rubbers to improve their modulus without sacrificing other properties. By utilizing the process of this invention, rubber compositions having increased modulus are prepared by grafting polyester onto rubber. This can be accomplished by reacting a polydiene rubber with a thioacid or maleic anhydride and subsequently with the polyester. It is also possible to prepare such polyester modified rubber compositions by reacting an epoxidized rubber with the polyester.Type: GrantFiled: November 7, 1990Date of Patent: April 13, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: James B. Pyle, Richard G. Bauer, Donald J. Burlett
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Patent number: 5196484Abstract: ABA triblock polymers, the A block being rigid having a transition away from its rigid phase above 70.degree. C., the B block being wholly or partly ion-coordinating, elastomeric or amorphous, the B/A block length ratio being greater than 1. When the B block is complexed with an ionic salt these polymers act as polymeric electrolytes which may be used in cells etc. Preferred polymers are those where HC.dbd.CH sites in the polybutadiene segment of a polystyrene-polybutadiene-polystyrene polymer are replaced by --CH.sub.2 CH--X--(CH.sub.2 CH.sub.2 O).sub.m --R, where X is link, R is alkyl. A preferred salt is LiCF.sub.3 SO.sub.3.Type: GrantFiled: January 24, 1992Date of Patent: March 23, 1993Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Jeremy R. M. Giles, Fiona M. Gray, Colin A. Vincent, James R. MacCallum
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Patent number: 5166267Abstract: It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. For example, it is typically desirable to increase the modulus of rubber compounds which are utilized in tire tread base compositions and in tire wire coat compounds. Unfortunately, most conventional techniques for increasing the modulus of a rubber compound are detrimental to other rubber properties, such as hysteresis and cut growth resistance. By utilizing the techniques of this invention rubber compounds can be prepared which exhibit high tensile strength, high modulus, and good cut growth resistance. The subject invention specifically relates to a process for preparing a highly dispersed blend of a polyester in an elastomer which comprises (1) blending a solution of a rubber in an organic solvent with a solution of a polyester in an organic solvent to produce a dispersion containing said rubber and said polyester, and (2) recovering the highly dispersed blend from the dispersion.Type: GrantFiled: September 17, 1990Date of Patent: November 24, 1992Assignee: The Goodyear Tire & Rubber CompanyInventors: Gerald Cohn, Douglas D. Callander, William C. T. Tung
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Patent number: 5162424Abstract: The invention relates to polymer mixtures which comprise a polybutylene terephthalate, a thermoplastic elastomer, and a brominated polystyrene. The polymer mixtures according to the invention have a combination of the following favorable properties: a good flexibility, a good flow of the melt, good flame-retarding properties and a high tracking index.Type: GrantFiled: April 10, 1990Date of Patent: November 10, 1992Assignee: General Electric CompanyInventors: Jan de Boer, Farshid Tabankia
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Patent number: 5159016Abstract: A thermoplastic resin composition is prepared by heat-treating a mixture of a thermoplastic resin substantially containing no olefinic unsaturated carbon-carbon bond and an elastomer having an olefinic unsaturated carbon-carbon bond, dynamically in the presence of a crosslinking agent, characterized in that as said elastomer there is used at least one member selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-iosprene-styrene block copolymer (SIS), 1,2-polybutadiene rubber and ethylene-propylene-diene random copolymer (EPDM), and that as said crosslinking agent there is used a dihydroaromatic compound or a polymer thereof.Type: GrantFiled: December 27, 1988Date of Patent: October 27, 1992Assignee: Nippon Petrochemicals Company, LimitedInventors: Toshio Inoue, Shiyuji Kashiwase, Masaaki Miyazaki, Toshitsune Yoshikawa, Masaaki Kobayashi
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Patent number: 5151466Abstract: A molding composition having improved toughness and impact strength comprising 60-90 percent by weight of a matrix resin in the form of a polyester or polyamide resin, reacted with 40-10 percent by weight of a rubber formed by copolymerization of ethylene, one or more mono-olefins, and preferably one or more polyenes, and an ester of an alpha, beta-unsaturated acid having an epoxide functionality on the alkoxy portion. The composition is prepared by forming a masterbatch containing the backbone rubber, a monomer having the epoxide functionality, a catalyst and a portion of the matrix resin of the final composition in a single step bulk process, and thereafter blending the masterbatch with the remainder of the matrix resin.Type: GrantFiled: March 28, 1990Date of Patent: September 29, 1992Inventor: Shrikant V. Phadke
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Patent number: 5149589Abstract: A thermoplastic elastomer composition of excellent fusion bond property, which is useful to produce a composite molded product having a molded part that is made of a synthetic resin material, for example, an engineering plastic material, which has excellent mechanical strength, and a molded part that is made of a high-elasticity thermoplastic elastomer. The thermoplastic elastomer composition comprises 100 parts by weight of a thermoplastic elastomer and 25 to 185 parts by weight of a thermoplastic polyester elastomer.Type: GrantFiled: September 6, 1990Date of Patent: September 22, 1992Assignee: Taisei Purasu Co., Ltd.Inventors: Masanori Naritomi, Noritaka Ogawa
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Patent number: 5137973Abstract: The invention relates to a crystalline polyolefin composition having dispersed therein a nucleating agent composed of one or more polyesters.Type: GrantFiled: September 10, 1990Date of Patent: August 11, 1992Assignee: Allied-Signal Inc.Inventors: Yash P. Khanna, Kevin R. Slusarz, Georgette Chomyn, Tammy L. Smith
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Patent number: 5120586Abstract: Bags having increased blocking resistance properties are formed of a film composed of a resin blend of a polyethylene (PE) resin and a polybutylene terephthalate (PBT) resin having an intrinsic viscosity or 0.7 of more. Preferably, the film is a multi-layer structure formed via coextrusion inflation molding techniques having inner and outer layers laminated to one another. The inner layer is a polyolefin, while the outer layer is composed of a PE/PBT blend, in which the PBT is present in an amount of between 5 to 30 wt. % based on the total weight of the resin composition and has a melt index of 0.7 or more. The thickness ratio of the internal layer to the external layer is preferably between 95/5 to 30/70.Type: GrantFiled: October 26, 1989Date of Patent: June 9, 1992Assignee: Polyplastics Co., Ltd.Inventors: Shigeru Nedzu, Haruyasu Ito
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Patent number: 5118760Abstract: Disclosed is a polymer blend of a copolyesterether and an isotactic homopolymer of propylene, molded articles of which have improved impact strength.Type: GrantFiled: December 26, 1990Date of Patent: June 2, 1992Assignee: Eastman Kodak CompanyInventors: Dale M. Blakely, Robert W. Seymour