Solid Polymer Derived From (meth)acrylonitrile Patents (Class 525/238)
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Publication number: 20020128393Abstract: The present invention provides a process of hydrogenating a nitrile copolymer rubber, which comprises subjecting the copolymer to hydrogenation in the presence of a hydrogenation catalyst, a co-catalyst, and a proton acceptor that is non-coordinating with the metal-complex catalyst.Type: ApplicationFiled: December 19, 2001Publication date: September 12, 2002Inventors: Sharon X. Guo, Paul Nguyen
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Patent number: 6420483Abstract: The invention relates to a process for preparing an impact-modified plastic, where particles of a crosslinked rubber are produced from a first monomer mixture which has at least 50% by weight of conjugated diene compounds, the rubber particles are added to a second monomer mixture which has at least 85% by weight, preferably at least 90% by weight, in particular at least 98% by weight, of styrene, and the monomers of the second monomer mixture are polymerized. This process can prepare novel and improved impact-modified plastics. Novel impact-modified plastics are also described.Type: GrantFiled: October 11, 2000Date of Patent: July 16, 2002Assignee: BASF AktiengesellschaftInventors: Graham Edmund Mc Kee, Hermann Gausepohl, Norbert Niessner, Norbert Güntherberg
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Patent number: 6417277Abstract: The present invention provides a coating composition which is excellent in a curing property (particularly a low temperature curing property) of a coating film and which forms a coating film having excellent chipping resistance and adhesive property, and it comprises a hydroxyl group-containing resin (A), a cross-linking agent (B) and a phosphoric acid group-containing vinyl resin (C).Type: GrantFiled: September 27, 2000Date of Patent: July 9, 2002Assignee: Kansai Paint Co., Ltd.Inventors: Yasuhiro Tomizaki, Akira Kasari
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Patent number: 6410649Abstract: A resin composition characterized by comprising from 5 to 95 wt % of an aromatic vinyl compound/olefin random copolymer (A) which has an aromatic vinyl compound content of from 1 to 99 mol % and has a head-to-tail chain structure composed of two or more aromatic vinyl compound units, and from 95 to 5 wt % of an &agr;-olefin type polymer (B) and/or an aromatic vinyl compound type polymer (C) (provided that it is neither a medical material nor a medical device), which contains substantially no chlorine and is excellent in the impact resistance, moldability, weather resistance and chemical resistance and which is useful for an injection molded product, an extrusion molded product, a film, a sheet, etc. Further, it provides an excellent damping material.Type: GrantFiled: September 22, 2000Date of Patent: June 25, 2002Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Takeshi Oda, Shigeru Suzuki, Toru Arai, Akio Okamoto, Masataka Nakajima, Hideki Toya
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Publication number: 20020077424Abstract: This invention relates to a mixture containing one or more olefin rubbers and one or more nitrile rubbers, to a process for the production thereof, to a vulcanizable mixture and to a process for the production thereof as well as to moldings of all kinds producible from the mixtures.Type: ApplicationFiled: August 20, 2001Publication date: June 20, 2002Inventor: Hans Magg
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Patent number: 6403716Abstract: A thermoplastic rubber composition prepared by crosslinking 1-99 parts by weight of a crosslinkable rubbery polymer (A) and 1-99 parts by weight of a polypropylene resin (B) (total amount of (A) and (B) being 100 parts by weight), wherein said (B) comprises a polypropylene resin (B-1) characterized by generation of a torque higher than Mo after melting and a polypropylene resin (B-2) characterized by generation of a torque not higher than Mo after melting, in a melting test of said (B) in the presence of an organic peroxide (temperature condition being at 200° C.), and Mo being a torque right after complete melting.Type: GrantFiled: July 12, 2000Date of Patent: June 11, 2002Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara
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Patent number: 6403723Abstract: The composition comprises a mixture of at least one ABS and/or ASA copolymer and an SAN copolymer having an acrylonitrile concentration of at least 43% by weight, and the quantity of SAN copolymer in the mixture is such that the total acrylonitrile concentration in the mixture is at least 30% by weight when the mixture contains only an ABS copolymer and at least 28% when the mixture contains an ASA copolymer alone or combined with an ABS copolymer.Type: GrantFiled: July 25, 2000Date of Patent: June 11, 2002Assignee: General Electric CompanyInventor: Jean-Marie G. L. Dumont
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Patent number: 6403722Abstract: An elastomeric blend prepared by the steps comprising: dynamically vulcanizing a dynamically-vulcanizable elastomer within a mixture that comprises the dynamically-vulcanizable elastomer, a hydrogenated acrylonitrile-butadiene copolymer, and a vulcanizing agent that is specific for the dynamically-vulcanizable elastomer during dynamic vulcanization. Also, a vulcanizate prepared by the steps comprising: dynamically vulcanizing a dynamically-vulcanizable elastomer within a mixture that comprises the dynamically-vulcanizable elastomer, a hydrogenated acrylonitrile-butadiene copolymer, and a vulcanizing agent that is specific to the dynamically-vulcanizable elastomer during dynamic vulcanization, and effecting vulcanization of the hydrogenated acrylonitrile-butadiene copolymer.Type: GrantFiled: October 3, 2000Date of Patent: June 11, 2002Assignee: The University of AkronInventors: Geralda Severe, James L. White
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Patent number: 6403720Abstract: A rubber composition containing 50 to 90 parts by weight of a diene rubber and 50 to 10 parts by weight of a gelled rubber having a toluene swelling index of 16 to 150, based upon the total amount of 100 parts by weight of the diene rubber and the gelled rubber.Type: GrantFiled: August 22, 2000Date of Patent: June 11, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Keisuke Chino, Hidekazu Onoi, Satoshi Mihara
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Patent number: 6399706Abstract: The present invention relates to rubber compounds comprising at least one rubber which contains double bonds, at least one rubber gel, and at least one sulfur-containing organosilicon compound. Vulcanized materials which can be employed in particular for the production of tire treads can be produced from the rubber compounds according to the invention.Type: GrantFiled: June 20, 2000Date of Patent: June 4, 2002Assignee: Bayer AktiengesellschaftInventors: Werner Obrecht, Winfried Jeske
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Patent number: 6365660Abstract: A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereof, and vinylcyclohexane polymers, and (B) at least one substance selected from the group consisting of compounding additives incompatible with the polymer, organic compounds having at least one alcoholic hydroxyl group and at least one ether linkage, and organic compounds having at least one alcoholic hydroxyl group and at least one ester linkage, wherein the initial light transmittance (a) of the molded or formed product at an optional wavelength within a range of 400 to 800 nm and the light transmittance (b) of the molded or formed product after the molded or formed product is held for 1,000 hours in an atmosphere of 65° C.Type: GrantFiled: January 26, 2000Date of Patent: April 2, 2002Assignee: Nippon Zeon Co., Ltd.Inventors: Teruhiko Suzuki, Tsutomu Nagamune, Teiji Kohara
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Patent number: 6359071Abstract: A thermoplastic elastomer composition dynamically vulcanized to a gelation rate of 50 to 95% which is superior in heat resistance and durability while maintaining flexibility and superior in air permeation preventive property which can be efficiently used as, for example, a pneumatic tire as an air permeation preventive layer. In particular, a thermoplastic elastomer composition having a reduced particle size of the domain rubber is produced by a material having a high rubber ratio by mixing a composition (C) mixed under conditions of a ratio of melt viscosities of the rubber composition (A)/resin (B) of 0.8 to 1.2 and the formula (&phgr;A/&phgr;B)×(&eegr;B/&eegr;A)<1.0 under conditions of a ratio of melt viscosities of the rubber composition (D)/composition (C) of 0.8 to 1.2 and the formula (&phgr;D/&phgr;C)×(&eegr;C/&eegr;D)<1.Type: GrantFiled: December 7, 1999Date of Patent: March 19, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Jiro Watanabe, Kazuto Yamakawa, Daisuke Kanenari, Noriaki Kuroda, Gou Kawaguchi, Yuichi Hara, Tetsuji Kawazura, Shigeru Yamauchi, Hideo Nemoto
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Publication number: 20020032282Abstract: A transparent rubber-modified styrenic resin composition contains a rubber-particle-dispersed phase (A) and a copolymer matrix (B). The phase (A) contains a rubbery copolymer which is a block copolymer formed from 10 to 50 wt % of styrenic monomers and 90 to 50 wt % of dienic monomers, wherein the rubbery copolymer block contains polystyrene block in an amount of 5 to 35 wt % based on total weight of the rubbery copolymer. The copolymer matrix (B) is composed of 12 to 70 parts by weight of styrenic unit, 20 to 80 parts by weight of (meth)acrylate unit, 1 to 20 parts by weight of vinyl cyanide unit, and 0 to 40 parts by weight of other copolymerizable monomer units, based on 100 parts by weight of total monomer unit. The content of the copolymer matrix (B) having a molecular weight of 3,000˜50,000 is in an amount of 15 to 50 wt %, based on the total weight of the copolymer matrix (B).Type: ApplicationFiled: December 7, 2000Publication date: March 14, 2002Inventor: Ray-Hsi Hsu
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Patent number: 6333386Abstract: A relatively small amount of a plasticizer having an SP value of at least 8.8 and a molecular weight of at most 550 is added to blend rubber of NBR-PVC in which NBR has an AN content of from 43 to 50% by weight. The fuel impermeability and the low-temperature flexibility of the resulting rubber composition are improved to be comparable to those of FKM, and the amount of the plasticizer and its reaction product to be released from the rubber composition in fuel is reduced. Adding a controlled amount of carbon black to the rubber composition makes the composition have favorable electroconductivity. The rubber composition is formed into hoses or electroconductive hoses of low fuel permeation.Type: GrantFiled: June 27, 2000Date of Patent: December 25, 2001Assignee: Tokai Rubber Industries, Ltd.Inventors: Takahiro Nishiyama, Shinobu Kanbe, Atsuo Miyajima, Kazuhiro Kato
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Publication number: 20010053823Abstract: In one embodiment, the invention provides a polymer comprising imidazole ring units having nitrogen at the 1 and 3 positions of the ring; a carbon at each of the 2, 4 and 5 positions of the ring; and radical substituents G1 and G2 carried at the 4 and 5 positions. G1 and G2 are each independently selected from cyano, substituents derived from cyano, and substituents which replace cyano. The polymers formed by at least two of the cyclic imidazole units. In another embodiment, the invention provides new imidazole compounds usable as monomers to form the polymers. In still another embodiment, the invention provides a method for using the polymers as a coupling/activator for synthon synthesis.Type: ApplicationFiled: July 26, 2001Publication date: December 20, 2001Inventors: Paul G. Rasmussen, Sarah E. Reybuck, David M. Johnson, Richard G. Lawton
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Patent number: 6294311Abstract: Imageable elements useful as lithographic printing members are disclosed. The elements contain a substrate, an underlayer, and a top layer. The underlayer contains a combination of polymeric materials that provides resistance both to fountain solution and to aggressive washes, such as a UV wash. The underlayer can be used in either thermally imageable or photochemically imageable elements.Type: GrantFiled: December 22, 1999Date of Patent: September 25, 2001Assignee: Kodak Polychrome Graphics LLCInventors: Ken-ichi Shimazu, Jayanti Patel, Jianbing Huang, Nishith Merchant, Mathias Jarek
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Patent number: 6277913Abstract: There is provided a thermoplastic resin composition and interior or exterior parts for vehicle using thereof, which is excellent in flexibility, surface appearance, heat deformation property at heating and has low tackiness at a high temperature. The thermoplastic resin composition comprises 25 to 90 parts by weight of a (meth)acrylic ester copolymer (X), which is prepared by polymerizing 40 to 95% by weight of a (meth)acrylic ester, 0 to 40% by weight of a vinyl cyanide compound, not more than 60% by weight of an aromatic vinyl compound and 0 to 40% by weight of a monomer copolymerizable therewith, and has a glass transition temperature of not more than 20° C. and a gel content of not more than 50% by weight, 5 to 75 parts by weight of a copolymer (Y), which has a glass transition temperature or a melting point not less than 50° C.Type: GrantFiled: May 21, 1999Date of Patent: August 21, 2001Assignee: Kaneka CorporationInventors: Ikuhiro Mishima, Kazuhito Wada
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Patent number: 6271308Abstract: The present invention relates to a stable polymer composition comprising a first polymer and a second polymer, which second polymer is not compatible with the first polymer, and an amount of a copolymer comprising at least one block of a polyalkadiene and at least one block of random poly(aromatic vinyl-acrylonitrile), and in which the ratio of the block copolymer to the total polymer composition is between 1:500 and 1:50. Besides, the invention relates to the use of the above block copolymer as compatibilizer and/or as modifier for the mechanical properties of polymer compositions.Type: GrantFiled: March 22, 1999Date of Patent: August 7, 2001Assignee: Rijksuniversiteit te GroningenInventors: Bert de Boer, Erik Kroeze, Georges Hadziioannou, Gerrit ten Brinke
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Patent number: 6262178Abstract: This invention is based upon the discovery that cyclized polyisoprene polymers can be incorporated into tire tread compounds to improve traction, treadwear, and resistance to tear. It is further based upon the discovery that cyclized polyisoprene polymers can be blended with halobutyl rubber and/or natural rubber and can be utilized in tire innerliner formulations. The present invention more specifically discloses a tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is comprised of a sulfur cured rubber composition which is comprised of about 5 phr to about 50 phr of cyclized polyisoprene and about 50 phr to about 95 phr of at least one other rubbery polymer.Type: GrantFiled: December 28, 1999Date of Patent: July 17, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul Harry Sandstrom, Joseph Frank Geiser, Judy Chu, David John Zanzig, Richard George Bauer
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Publication number: 20010007892Abstract: A rubber composition obtained byType: ApplicationFiled: February 5, 2001Publication date: July 12, 2001Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Yasuhisa Minagawa, Hiroki Sarashi, Minoru Ueda
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Publication number: 20010006999Abstract: A rubber composition comprising a nitrile rubber (a) having a bound unsaturated nitrile content of 43-60% by weight and a polymer Mooney viscosity (ML1+4, 100°) of 95-140 and a vinyl chloride resin (b).Type: ApplicationFiled: December 20, 2000Publication date: July 5, 2001Applicant: Zeon CorporationInventors: Tsuyoshi Konno, Toshiaki Saya, Atsushi Suzuki, Hideyuki Fujiwara, Daisuke Tsutsumi
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Patent number: 6254956Abstract: A floor, wall or ceiling covering which comprises one or more substantially random interpolymers prepared by polymerizing one or more &agr;-olefin monomers with one or more vinylidene aromatic monomers and/or one or more hindered aliphatic or cycloaliphatic vinylidene monomers, and optionally with other polymerizable ethylenically unsaturated monomer(s). The floor, wall or ceiling covering has a good balance of properties, such as sufficient flexibility and conformability to uneven or contoured surfaces for efficient application to floors, walls, or ceilings, sufficient scratch resistance, sufficient indentation resistance, indentation recovery and/or sufficient abrasion resistance.Type: GrantFiled: March 2, 1999Date of Patent: July 3, 2001Assignee: The Dow Chemical CompanyInventors: Jerker B. I. Kjellqvist, Stephen R. Betso, Ronald Wevers, Johan A. Thoen, John O. Bieser
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Patent number: 6251996Abstract: Gel-type copolymer beads are described which are useful as ion exchange resins such as those used in the treatment of power plant condensate water. The subject copolymer beads possess an interpenetrating polymer network of at least two polymer components including: (i) a first polymer component derived from a first monomer mixture comprising a first monovinylidene monomer having a styrenic content less than about 50 molar percent and (ii) a second polymer component derived from a second monomer mixture comprising: a second monovinylidene monomer having a styrenic content greater than about 50 molar percent and a second crosslinking agent. The ratio of the molar percent crosslinking agent of the first polymer component to the second polymer component is less than about 0.7. Methods for making the subject beads and methods for their use as ion exchange resins for treating aqueous solutions are also provided.Type: GrantFiled: October 26, 1999Date of Patent: June 26, 2001Assignee: The Dow Chemical CompanyInventors: James R. Stahlbush, Kenneth L. Foster
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Patent number: 6248830Abstract: A polyolefin resin composition comprises a component A consisting of polypropylene or a propylene-ethylene block copolymer whose MFR is greater than 16 (g/10 minutes); a component B consisting of an ethylene based rubber; and a component D compatible with the component B. A ratio of summation of the propylene-ethylene copolymer part in the component A, the component B, and the component D to summation of the components A, B, and D is 25 wt. % or more and 45 wt. % or less. Further, a ratio of the blend quantity of the component D to summation of the blend quantities of the components B and D is less than 0.8. In this manner, the bending elastic modulus and the tensile breaking extension are included in a desired region, while the tensile breaking extension is improved.Type: GrantFiled: August 27, 1999Date of Patent: June 19, 2001Assignee: Mazda Motor CorporationInventors: Yushi Matsuda, Masao Hara, Daisaburou Adachi
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Patent number: 6239221Abstract: A polymer composition comprising a blend of (a) a grafted olefin rubber, (b) an ungrafted olefin rubber, (c) a copolymeric matrix and an optional (d) a grafted acrylate rubber is disclosed. The composition which is characterized in having a desirable balance of impact strength and low gloss is useful for molding and extrusion of articles for certain outdoor applications.Type: GrantFiled: March 3, 1998Date of Patent: May 29, 2001Assignee: Bayer Antwerpen S.A./N.V.Inventor: Chuan-Ju Chen
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Patent number: 6221964Abstract: The invention relates to a foamable polymeric composition, comprising a thermoplastic elastomer on the basis of a polyolefin and a rubber; the invention is characterized in that the polyolefin is a polypropylene homo- or copolymer having: a weight average molecular weight, Mw, of at least 2*105, and an elongational viscosity (measured at a temperature of 170° C., at a rate of elongation of 0.03 s−1 and at a time of 10 s), EV(170/10), of at least 1.4*105 Pa.s. The invention relates also to a process for foaming a polymeric composition, as well as to a foamed thermoplastic article.Type: GrantFiled: October 22, 1999Date of Patent: April 24, 2001Assignee: DSM N.V.Inventors: Ryszard Brzoskowski, Mohammed R. Sadeghi, Yundong Wang
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Patent number: 6218473Abstract: The present invention relates to a sulfur cured rubber composition particularly suited for use in tire treads. The sulfur cured rubber composition is composed of, based on 100 parts by weight of rubber, from about 1.0 to 15 parts by weight of a chlorosulfonated polyethylene; from about 1.0 to 15 parts by weight of a carboxylated nitrile rubber; and 98 to 70 parts by weight of a rubber selected from the group consisting of medium vinyl polybutadiene, styrene-butadiene rubber, synthetic cis-1,4-polyisoprene, synthetic 3,4-polyisoprene, natural rubber, cis-1,4-polybutadiene, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, acrylonitrile-butadiene rubber and mixtures thereof.Type: GrantFiled: December 14, 1999Date of Patent: April 17, 2001Assignee: The Goodyear Tire & Rubber CompanyInventor: Paul Harry Sandstrom
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Patent number: 6214922Abstract: A nitrite polymer vulcanizate having improved hot air aging characteristics is described. The nitrite polymer vulcanizate may be produced admixing a composition comprising: (i) a nitrite polymer; (ii) a filler; (iii) an additive selected from the group comprising: a strong base, a salt of a strong base and a weak acid, a salt of a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof; and (iv) a vulcanization system. A vulcanizable composition useful for producing such a vulcanizate and a method for improving the hot air aging characteristics of a nitrite polymer are also described.Type: GrantFiled: March 3, 1999Date of Patent: April 10, 2001Assignee: Bayer Inc.Inventor: Ezio Campomizzi
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Patent number: 6211298Abstract: The present invention is an improved rubber-modified polymeric composition comprising: (a) a continuous matrix phase comprising an interpolymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer; and (b) from 5 to 40 weight percent, based on the total weight of said polymeric composition, of a rubber in the form of discrete rubber particles dispersed in said matrix, wherein the dispersed rubber particles comprise: (1) at least 33 weight percent based on the total rubber content, of a mass rubber particle component having a volume average particle diameter of from 0.15 to 0.40 micron; (2) from 15 to 67 weight percent based on the total rubber content, of a small-particle emulsion rubber component having a volume average diameter of from 0.05 to 0.30 micron; and (3) from 0 to 35 weight percent based on the total rubber content, of a large emulsion particle rubber component having a volume average diameter of from greater than 0.30 to 2.Type: GrantFiled: September 24, 1999Date of Patent: April 3, 2001Assignee: The Dow Chemical CompanyInventors: Rony S. Vanspeybroeck, Mercedes R. Galobardes, Dominique Maes, Mary Ann Jones, Joseph M. Ceraso
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Patent number: 6187867Abstract: A rubber composition comprising: at least one hydrogenated nitrile rubber, and at least one thermoplastic polyolefin, wherein the weight ratio (hydrogenated nitrile rubber:thermoplastic polyolefin) is in the range from 95:0.5 to 50:50. The composition retains substantially the resistance to heat and chemicals and the mechanical properties characteristic of hydrogenated nitrile rubber upon curing.Type: GrantFiled: March 26, 1999Date of Patent: February 13, 2001Assignee: Zeon Chemicals L.P.Inventors: Paul Rau, Philippe Milazzo
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Patent number: 6169146Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E): (A) an atactic polystyrene or a mixture of an atactic polystyrene and a rubber-like elastic substance: 30 to 95 parts by weight; (B) a syndiotactic polystyrene having a melting point of not higher than 255° C.: 70 to 5 parts by weight; (C) a polyphenylene ether having an intrinsic viscosity of 0.5 deciliter/g or less as measured in chloroform at 25° C.; (D) an inorganic filler; and (E) a polymer having compatibility or affinity with components (A) and (B) and having a polar group. The styrene resin composition exhibits improved solvent resistance and remarkable impact resistance. The composition of the invention is produced by kneading the components within a resin temperature range between the melting point of component (B) and 270° C.Type: GrantFiled: January 12, 1999Date of Patent: January 2, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Akihiko Okada, Takuma Aoyama
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Patent number: 6114029Abstract: Disclosed is a biaxially stretched styrenic resin sheet obtained by biaxially stretching a resin composition comprising (A) a styrenic resin and (B) crosslinked styrenic fine particles having an average particle size of 0.5 to 15 .mu.m in an amount of from 0.001 to 1% by weight based on the resin composition. The resin composition may further comprise (C) a rubber modified styrenic resin containing a rubber component having an average particle size of 0.1 to 4 .mu.m in such an amount that the rubber component concentration attributed to the rubber modified styrenic resin is from 0.005 to 0.1% by weight based on the resin composition. The styrenic stretched sheets exhibit improved blocking resistance owing to fine unevenness uniformly formed on the surface thereof while retaining the transparency. Even when a number of the sheets or formings obtained therefrom are stacked, they are easily separated apart without blocking.Type: GrantFiled: September 7, 1999Date of Patent: September 5, 2000Assignee: Daicel Chemical Industries, Ltd.Inventors: Hiroyuki Yanai, Syozo Yamamoto
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Patent number: 6111022Abstract: The present invention is directed to a process of atom (or group) transfer radical polymerization for the synthesis of novel homopolymer or a block or graft copolymer, optionally containing at least one polar group, with well defined molecular architecture and narrow polydispersity index, in the presence of an initiating system comprising (i) an initiator having a radically transferrable atom or group, (ii) a transition metal compound, and (iii) a ligand; the present invention is also directed to the synthesis of a macromolecule having at least two halogen groups which can be used as a macroinitiator component (i) to subsequently form a block or graft copolymer by an atom or group transfer radical polymerization process; the present invention is also directed to a process of atom or group transfer radical polymerization for the synthesis of a branched or hyperbranched polymer; in addition, the present invention is directed to a process of atom or group transfer radical polymerization for the synthesis of a maType: GrantFiled: December 8, 1998Date of Patent: August 29, 2000Assignee: Carnegie-Mellon UniversityInventors: Krzysztof Matyjaszewski, Simion Coca, Scott G. Gaynor, Yoshiki Nakagawa, Seong Mu Jo
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Patent number: 6087453Abstract: This invention provides a vulcanizable rubber composition comprising (a) 100 parts by weight of a nitrile-containing highly saturated copolymer rubber obtained by hydrogenating the conjugated diene portions of an unsaturated nitrile-conjugated diene-unsaturated carboxylic acid ester copolymer, (b) 10 to 100 parts by weight of a metallic salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) 0.1 to 30 parts by weight of an organic peroxide vulcanizing agent, and optionally (d) 0.5 to 30 parts by weight of a compound of a group 2A metal in the periodic table. The vulcanized product of this composition is useful as a seal for Freons because it is excellent in low-temperature resistance and resistance to Freon gas permeation and has resistance to the production of cracks in the rubber surface due to the foaming of Freon gas.Type: GrantFiled: July 30, 1998Date of Patent: July 11, 2000Assignee: Nippon Zeon Co., Ltd.Inventor: Koichi Nishimura
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Patent number: 6087449Abstract: The thermoplastic molding material contains a mixture of(A) from 10 to 60% by weight of a methyl methacrylate polymer,(B) from 10 to 70% by weight of a copolymer of a vinyl aromatic monomer and vinyl cyanide(C) from 15 to 50% by weight of a graft copolymer obtainable from a core (C1) comprising a 1,3-diene and a vinyl aromatic monomer, a first graft shell (C2) comprising a vinyl aromatic monomer, a C.sub.1 -C.sub.8 -alkyl ester of methacrylic acid and a crosslinking monomer and a second graft shell (C3) comprising a C.sub.1 -C.sub.8 -alkyl ester of methacrylic acid and a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid, and(D) if required, conventional additives,the stated percentages of A, B and C in the mixture summing to 100% by weight.Type: GrantFiled: February 6, 1998Date of Patent: July 11, 2000Assignee: BASF AktiengesellschaftInventors: Kristin Tiefensee, Rainer Neumann
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Patent number: 6069202Abstract: Desirable thermoplastic vulcanizates can be prepared from a polar engineering thermoplastic; a halogenated copolymer of p-alkylstyrene and an isomonoolefin having from 4 to 7 carbon atoms; and either an ethylene rubbery polymer or a diene based rubbery polymer or combinations thereof. The ethylene rubbery polymer desirably has at least one pendant carboxylic acid group, amine group, epoxy group, hydroxyl group or an anhydride of two carboxylic acid groups or combinations thereof. Desirable diene based rubbery polymers include epoxidized natural rubber and epoxidized homopolymers and copolymers of dienes.Type: GrantFiled: December 10, 1997Date of Patent: May 30, 2000Assignee: Advanced Elastomer Systems, L.P.Inventors: Krishna Venkataswamy, Jacques Horrion
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Patent number: 6063870Abstract: The rigid vinyl chloride resin composition comprises 100 parts by weight of a vinyl chloride resin having an average degree of polymerization of 350 to 600, 5 to 30 parts by weight of an impact-resistant improver, and 5 to 20 parts by weight of an acrylonitrile-styrene copolymer having a weight ratio acrylonitrile and styrene of 1/99 to 9/91. This composition has good impact strength and fluidity.Type: GrantFiled: August 5, 1998Date of Patent: May 16, 2000Assignee: Shin-Etsu Chemical, Co., Ltd.Inventors: Yuji Tokushige, Osamu Sodeyama
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Patent number: 6043318Abstract: Disclosed is a process for the making a polyvinylchloride/acrylonitrile-butadiene rubber blend by a) coating a polyvinylchloride resin with a stabilizer to form a precoated PVC; b) blending said precoated PVC with one or more acrylonitrile-butadiene rubbers to form a prestabilized NBR/PVC blend; and c) applying heat and pressure to intimately blend said prestabilized NBR/PVC blend into a fluxed NBR/PVC blend. Another aspect is a novel polyvinylchloride/acrylonitrile-butadiene rubber blend having a stabilizer homogeneously and uniformly distributed throughout the microscopic polyvinylchloride domains.Type: GrantFiled: September 27, 1996Date of Patent: March 28, 2000Inventors: Christopher John Hardiman, George Thomas McKenzie, Lothar Frank Stiberth
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Patent number: 6037415Abstract: A composition for use in the finishing of a polymer surface comprises a dry, stable homogeneous mixture of pigment and a thermoplastic resin compatible with the polymer surface. The homogeneous mixture is soluble in a solvent to form a lacquer, for application to the surface, that has a colour determined by the amount and chromatic characteristics of the pigment in the dry mixture. The composition can be delivered to a customer and conveniently mixed on site to produce a lacquer having the desired colour characteristics.Type: GrantFiled: December 17, 1997Date of Patent: March 14, 2000Assignee: Stuart Plastics Ltd.Inventor: Gordon Pawelchak
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Patent number: 6033826Abstract: A polymer of polyhydroxystyrene derivative containing an acetal or ketal group which can easily be eliminated in the presence of an acid in the molecule and having a very narrow molecular weight distribution gives a resist material suitable for forming ultrafine patterns excellent in resolution, heat resistance, mask linearity, and other properties without causing problems of delay time and the like.Type: GrantFiled: December 19, 1996Date of Patent: March 7, 2000Assignee: Wako Pure Chemical Industries, Ltd.Inventors: Fumiyoshi Urano, Hirotoshi Fujie, Keiji Oono
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Patent number: 6020416Abstract: The invention pertains to aqueous blends of colloidally dispersed polymers for use in making organic coatings which are hard and ductile at ambient temperature, which coatings remain stiff and elastic at temperatures well above their film-formation or drying temperature. In particular, the invention relates to specific combinations or thermoplastic blends of polymers of very high molecular weights. Such blends produce smooth, essentially crack-free coatings when dried conventionally under atmospheric pressure. Such blends are capable of developing the desired balance of properties without conventional amounts of volatile organic coalescing aids and without the need for chemical cure.Type: GrantFiled: February 2, 1998Date of Patent: February 1, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Stephen Mazur, Gerald Donald Andrews
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Patent number: 6013732Abstract: The present invention provides a stainproofing agent having the durability capable of maintaining sufficient water- and oil-repellency as well as stainproofing properties before and after cleaning. Disclosed is a stainproofing agent containing (A) a fluroalkyl group-containg copolymer having (I) a structure unit derived from a monomer having a fluoroalkyl group, (II) a structure unit derived from a monomer containing no fluorine, (III) a structure unit derived from vinyl chloride, and (IV) a structure unit derived from a crosslinking monomer; (B) a urethane compound having a fluoroalkyl group, or a copolymer having (V) a structure unit derived from a monomer having a fluoroalkyl group and a carbon-carbon double bond, and (VI) a structure unit derived from a monomer which contains no fluorine atom and has at least one urethane or urea linkage and one carbon-carbon double bond; and (C) an acrylic copolymer containing no fluorine.Type: GrantFiled: January 16, 1998Date of Patent: January 11, 2000Assignee: Daikin Industries Ltd.Inventors: Masayuki Yamana, Ikuo Yamamoto, Teruyuki Fukuda
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Patent number: 5998544Abstract: Graft copolymers are prepared by anionic polymerization which comprises reacting polymers (A) having at least one anionic chain end with polymers (B) which contain at least one nitrile group, in the presence of a solvent.Type: GrantFiled: October 9, 1997Date of Patent: December 7, 1999Assignee: BASF AktiengesellschaftInventors: Axel Gottschalk, Ralf Engelhardt, Martin Weber, Konrad Knoll
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Patent number: 5998546Abstract: An anti-static resinous composition with permanent anti-static property is provided. The anti-static resinous composition comprises from 5 to 50 percent by weight of hydrophilic copolymer and from 50 to 95 percent by weight of thermoplastic. The hydrophilic copolymer is formed by self-emulsion polymerization. The monomer mixture used in the reaction comprises from 10 to 70 percent by weight of vinyl or propenyl macromonomer containing a polyethylene oxide chain and from 30 to 90 percent by weight of ordinary vinyl monomer. The thermoplastic is compatible with the hydrophilic copolymer. The resultant resinous composition has permanent anti-static properties.Type: GrantFiled: April 7, 1997Date of Patent: December 7, 1999Assignee: Industrial Technology Research InstituteInventors: Kuo-Chen Li, Jui-Ming Ni, Tsai-Wie Tseng, Jen-Lien Lin
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Patent number: 5976759Abstract: A polymer composition comprising (i) a polymer (a) having a monomer unit containing a functional group A which becomes alkali-soluble by heating in the presence of an acid, (ii) a polymer (b) having a monomer unit containing a functional group B which also becomes alkali-soluble, but less easily than the functional group A, by heating in the presence of an acid, and if necessary in addition to (i) and (ii) or in place of (ii), (iii) a phenolic compound having a weight-average molecular weight of 300 to 15,000 gives together with an photoacid generator a resist material suitable for forming a pattern excellent in sensitivity, resolution, mask linearity and other properties.Type: GrantFiled: December 19, 1996Date of Patent: November 2, 1999Assignee: Wako Pure Chemical Industries, Ltd.Inventors: Fumiyoshi Urano, Hirotoshi Fujie, Keiji Oono
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Patent number: 5969042Abstract: Thermoplastic molding materials contain a mixture of(A) a methacrylate polymer,(B) a copolymer of vinylaromatic monomers and vinyl cyanide,(C) a graft copolymer comprising a core and a graft shell and(D) a further graft copolymer comprising a core and a graft shell,the average particle size (d.sub.50)-C of the graft copolymer (C) being from 25 to 60 nm and that of the graft copolymer (D) being from 90 to 300 nm and the ratio of the average particle size (d.sub.50)-C to (d.sub.50)-D being kept in the range from 2:1 to 5:1.Type: GrantFiled: January 13, 1998Date of Patent: October 19, 1999Assignee: BASF AktiengesellschaftInventors: Kristin Tiefensee, Norbert Guntherberg
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Patent number: 5962591Abstract: There is a need for halogen-free polymeric compositions which offer increased heat and ultraviolet light resistance for utilization in automotive interiors. For instance, it is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance.Type: GrantFiled: August 26, 1997Date of Patent: October 5, 1999Assignee: The Goodyear Tire & Rubber CompanyInventors: Hung Dang Ngoc, Bernard Louis Marie Nigen
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Patent number: 5919837Abstract: Wet processed friction materials are disclosed wherein the components thereof include blends of a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.Type: GrantFiled: June 17, 1997Date of Patent: July 6, 1999Assignee: Sterling Chemicals International, Inc.Inventors: Stanley Sigmund Kaminski, Robert Ellsworth Evans
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Patent number: 5919864Abstract: A thermoplastic elastomer composition containing a thermoplastic resin component including 10 to 95% by weight of a polypropylene having a syndiotactic structure and an elastomer component and having a value of .alpha., defined as follows, of 1 or less:.alpha.=(.phi.d/.phi.m).times.(.eta.m/.eta.d)wherein the volume fraction of the thermoplastic resin component is .phi.m, the melt viscosity thereof at the mixing conditions is .eta.m and the volume fraction of the elastomer component is .phi.d, the melt viscosity thereof is .eta.d.Type: GrantFiled: March 6, 1998Date of Patent: July 6, 1999Assignee: The Yokohama Rubber Co., Ltd.Inventors: Jiro Watanabe, Osamu Ozawa, Noriaki Kuroda, Gou Kawaguchi
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Patent number: 5905118Abstract: Disclosed herein are terpolymers of styrene, acrylonitrile and dimethyl styrene phosphonate and blends thereof with poly(styrene acrylonitrile) polymers and polymers and copolymers of methylmethacrylate.Type: GrantFiled: April 24, 1998Date of Patent: May 18, 1999Assignee: Bayer Antwerpen S.A./N.V.Inventor: Allen Robert Padwa