Mixture Contains Solid Polymer Derived From Nonaromatic Reactant Containing Plural Ethylenically Unsaturated Groups Patents (Class 525/86)
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Patent number: 4788250Abstract: Disclosed is a thermoplastic resin composition comprising a graft polymer resin (I) obtained by polymerizing one or more monomers (b) selected from the group consisting of aromatic vinyl compounds and ethylenically unsaturated compounds, in the presence of a latex of an ethylene-propylene-non-conjugated diene terpolymer rubber (a) having a specific gel content and a specific particle diameter, so that the graft polymer resin contains a specific proportion of the rubber (a); and a rigid thermoplastic resin (II). This resin composition has excellent weather resistance and impact resistance, and yields molded articles having a good surface gloss.Type: GrantFiled: October 8, 1987Date of Patent: November 29, 1988Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Haruyoshi Kitahara, Yasuaki Ii, Yutaka Toyooka
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Patent number: 4785051Abstract: According to the present invention, there are produced rubber-modified monovinylidene aromatic polymers having three different types of rubber particles. The first is a small particle. The second is a large emulsion particle. The third is a large mass particle. Compositions according to the present invention exhibit good combinations of toughness and gloss.Type: GrantFiled: March 17, 1987Date of Patent: November 15, 1988Assignee: The Dow Chemical CompanyInventor: David E. Henton
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Patent number: 4783504Abstract: A sealant composition comprising:(a) 100 parts by weight of a silane functionalized polymer component which is prepared by reacting enough silane of the general formula R R'.sub.n SiY.sub.Type: GrantFiled: February 28, 1986Date of Patent: November 8, 1988Assignee: Shell Oil CompanyInventors: David J. St. Clair, Steven S. Chin
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Patent number: 4778850Abstract: A: Thermoplastic moulding materials made from a vinyl chloride homopolymer or copolymer containing at least 50% by weight of vinyl choloride units,B: a graft polymer, prepared by graft polymerization ofB1: 50 to 85 parts by weight of a mixture of at least two of the monomers styrene, acrylonitrile, methyl methacrylate and .alpha.-methyl styrene onB2: 50 to 15 parts by weight of an at least partially crosslinked butadiene or acrylate rubber having average particle diameters of 0.08 to 1 .mu.Type: GrantFiled: June 22, 1987Date of Patent: October 18, 1988Assignee: Bayer AktiengessellschaftInventors: Christian Lindner, Hartmuth Buding, Hans-Eberhard Braese, Rudolf Casper, Karl-Heinz Ott
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Patent number: 4774287Abstract: A heat-resistant copolymer obtained by copolymerizing (A) 72-82 parts by weight of .alpha.-methylstyrene and (B) 26-18 parts by weight of acrylonitrile, characterized in that the copolymer contains (a) 0-15% by weight of monomer chain 13 (A)-(A)-(A)--, (b) 50% by weight or more of monomer chain --(A)-(A)-(B)--, and (c) 50% by weight or less of monomer chain --(B)-(A)-(B)--, the total of (a), (b) and (c) being 100% by weight. This copolymer is excellent in heat stability and moldability when molded at high temperatures, and the blending of this copolymer with other thermoplastic resins gives thermoplastic resins with excellent heat resistance.Type: GrantFiled: December 29, 1986Date of Patent: September 27, 1988Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Yasuyuki Shimozato, Syuji Tsuchikawa, Shinichi Kimura, Masahiko Noro
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Patent number: 4771107Abstract: A thermoplastic molding material which contains, in each case based on the molding material comprising A+B,A. from 50 to 95% by weight of a rigid matrix composed of,(a.sub.1) styrene and(a.sub.2) acrylonitrile,B. from 50 to 5% by weight of a nonrigid phase which is uniformly dispersed in the rigid matrix and which comprises a graft copolymer of the monomers (a.sub.1) and (a.sub.2) and a styrene-butadiene block copolymer,wherein the styrene-butadiene block copolymer has a styrene content of from 50 to 95% by weight and a butadiene content of from 50 to 5% by weight, each based on the block polymer, and has a molecular weight (weight average) within the range from 50,000 to 300,000, is used for producing moldings.Type: GrantFiled: February 5, 1987Date of Patent: September 13, 1988Assignee: BASF AktiengesellschaftInventor: Hans Hoenl
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Patent number: 4767803Abstract: Disclosed is a method of producing coagulated colloidal particles with close-packed structure which comprises;(A) adding a coagulant to aqueous colloidal particles at a temperature lower than softening temperature of the colloidal particles under such conditions that said coagulant will be present in discrete units in the dispersion before it is brought into solution by diffusion;(B) allowing the molecules of coagulant to gradually diffuse from said coagulant units into the surrounding dispersion, thereby coagulating the colloidal particles on the surface of each coagulant unit, causing the coagulated particles to grow from inside to outside of each unit, and producing coagulated particles of desired size with regularly packed structure;(C) separating the coagulated particles thus formed from the dispersion; and(D) drying, or heating in an aqueous phase, the coagulated particles separated above at a temperature lower than the softening point of said colloidal particles.Type: GrantFiled: July 2, 1986Date of Patent: August 30, 1988Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Hideo Yasui, Yasuhiro Miki, Wataru Okada
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Patent number: 4764558Abstract: A thermodynamically miscible polymer composition containing a copolymer having recurring units of an alkyl vinyl ether and recurring units of an N-aryl substituted maleimide and an acrylonitrile copolymer is disclosed.Type: GrantFiled: March 20, 1987Date of Patent: August 16, 1988Assignee: Arco Chemical CompanyInventor: Bi Le-Khac
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Patent number: 4764563Abstract: PVC impact modifier composition and clear modified PVC comprising PVC and a graft copolymer including from 60 to 70 wt % of a butadiene based rubber grafted with 40 to 30 wt % of a styrenic composition and a ethylenically unsaturated nitrile in a ratio of about 3/1 to 5/1. These compositions have excellent clarity and good impact properties.Type: GrantFiled: February 27, 1987Date of Patent: August 16, 1988Assignee: Borg-Warner Chemicals, Inc.Inventors: Frank L. Meredith, Lewis E. Ferguson
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Patent number: 4762886Abstract: A weather resistant thermoplastic resin composition which comprises (A) a graft polymer comprising (A-1) chosen from a copolymer of ethylene and propylene, a terpolymer of ethylene, propylene and a non-conjugated diene, a copolymer of ethylene and vinyl acetate, an alkyl acrylate or methacrylate polymer and a chlorinated polyethylene and (A-2) at least two kinds of monomers chosen from aromatic vinyl compounds, vinyl cyanide compounds and unsaturated carboxylic acid alkyl esters grafted thereon and (B) a terpolymer comprising styrene aromatic compounds, vinyl cyanide compounds and unsaturated carboxylic acid alkyl esters. The weight proportion of the graft polymer (A) and the terpolymer (B) is preferably from 10:90 to 90:10. In particular the amounts of styrene the vinyl cyanide compounds and the unsaturated carboxylic acid alkyl esters in the terpolymer (B) are 3 to 65% by weight, 2 to 35% by weight and 3 to 95% by weight, respectively.Type: GrantFiled: May 5, 1987Date of Patent: August 9, 1988Assignee: Sumitomo Naugatick Co., Ltd.Inventors: Mikio Hirai, Yoshiaki Nishikubo, Tomio Yoshida, Tsuneo Ochi
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Patent number: 4760108Abstract: A microcapsule-containing water-base coating formulation comprises as essential components (a) microcapsules making use of a synthetic resin as a wall-forming material and (b) a reaction product obtained by polymerizing at least one water-soluble vinyl monomer (B) in the presence of a high polymer latex (A) having a glass transition point of 60.degree. C. or lower. The latex (A) and vinyl monomer (B) are used at a solid weight ratio of 3:97-90:10. The water-base coating formulation can provide a microcapsule-coated layer having significantly-improved pressure resistance and frictional stability without need for a stilt. The water-base coating formulation can be applied at a high speed, thereby making a significant improvement to the productivity of carbonless copying and/or recording paper.Type: GrantFiled: December 20, 1985Date of Patent: July 26, 1988Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Makoto Asano, Kiyoharu Hasegawa, Masatoshi Takagi, Takamine Yamaguchi
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Patent number: 4753708Abstract: A film forming dispersion for the heat sealing of dissimilar substrate said dispersion comprising at least two different types of polymers having different adhesive properties in an organic solvent system, at least one of the polymer types being fully miscible at room temperature with the organic solvent system, both of said two polymer types having an acid number ranging from 0 to 160 mg KOH per gram of polymer, and said dispersion further containing a third graft polymer containing components corresponding to said two different polymer types.Type: GrantFiled: April 6, 1987Date of Patent: June 28, 1988Assignee: Rohm GmbHInventors: Gerhard Markert, Horst Pennewiss, Waldemar Schleier, Reiner Schnee
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Patent number: 4745156Abstract: A polyvinyl chloride resin composition is disclosed, which contains an .alpha.-methylstyrene/acrylonitrile copolymer in a specified amount. Forming sheet materials made therefrom having high heat distortion resistance as well as a favorable balance of tensile strength and stretching characteristics at elevated temperatures and being suitable for vacuum and pressure forming are also disclosed.Type: GrantFiled: August 11, 1986Date of Patent: May 17, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Masayuki Yoshihara, Nobuo Naka, Masanori Kobayashi
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Patent number: 4743649Abstract: Films of linear ethylene polymers, particularly copolymers of ethylene and alpha-olefins of 4 to 10 carbon atoms (LLDPE), containing up to about 15 weight percent of an impact polymer, e.g. impact polystyrene, exhibit excellent film properties and improved blocking.Type: GrantFiled: September 2, 1986Date of Patent: May 10, 1988Assignee: Mobil Oil CorporationInventor: David V. Dobreski
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Patent number: 4740560Abstract: A polyblend of a high graft copolymer, a low graft copolymer and a matrix interpolymer is made by:(A) mixing a latex of the high graft copolymer and a latex of the low graft copolymer to provide a mixture thereof;(B) coagulating and at least partially dewatering the mixture of step (A);(C) melt blending the mixture of step (B) to provide a first polyblend; and(D) melt blending the first polyblend of step (C) with matrix interpolymer to provide a second polyblend.Type: GrantFiled: April 17, 1986Date of Patent: April 26, 1988Assignee: The Dow Chemical CompanyInventors: Eugene R. Moore, Gary D. Parsons, Paul C. Balliet
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Patent number: 4732926Abstract: A high impact dry blendable polypropylene composition filled with mica and reinforced with an impact modifier of ethylene-propylene-diene monomer rubber/high density polyethylene.Type: GrantFiled: September 29, 1986Date of Patent: March 22, 1988Assignee: General Motors CorporationInventor: Douglas L. Faulkner
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Patent number: 4717741Abstract: A rubber-modified polymeric composition is disclosed. The rubber-modifying component comprises a grafted rubbery polymer, said grafted rubbery polymer being formed by a process, the steps of the process involving the formation of a hydroperoxidized rubbery polymer intermediate.Type: GrantFiled: May 16, 1985Date of Patent: January 5, 1988Assignee: The Dow Chemical CompanyInventors: Jerry L. Hahnfeld, Alan E. Platt, David A. Habermann
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Patent number: 4716197Abstract: The specification discloses a polymer blend comprising from about 20 to 90% of an olefin combination including a high density polyolefin and a linear low density polyolefin, from about 6 to about 60% of a vinyl aromatic polymer and from about 4 to about 20% of a compatibilizer therefore.Type: GrantFiled: April 21, 1986Date of Patent: December 29, 1987Assignee: The Dow Chemical CompanyInventors: Randolph H. Seiss, Edward H. Yonkers
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Patent number: 4711913Abstract: This invention provides hardenable compositions useful as construction media for a wide range of applications. Particular utility is found in the dental and medical arts where such compositions are highly suitable for the formation and construction of denture base, denture baseplates, denture liners, denture repair, custom trays, veneering for crowns and bridgework, artificial teeth, veneers and repair for natural teeth, and tooth restorative fillings. Such materials having improved impact strengths and elastic moduli when hardened are disclosed which include rubber-modified polymer.Type: GrantFiled: September 25, 1984Date of Patent: December 8, 1987Assignee: Dentsply International Inc.Inventors: Louis H. Tateosian, W. Donald Wilson
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Patent number: 4704431Abstract: A polymer resin comprising a blend of polypropylene, a copolymer of a vinylaromatic monomer and .alpha.-methylstyrene prepared by anionic polymerization at a temperature above 61.degree. C. and a monovinylidene aromatic polymer grafted .alpha.-olefin copolymer compatibilizing agent.Type: GrantFiled: April 4, 1986Date of Patent: November 3, 1987Assignee: The Dow Chemical CompanyInventors: Van I. W. Stuart, Duane B. Priddy
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Patent number: 4703083Abstract: Compositions comprising 100 parts by weight high (>50 wt %) nitrile rubber graft copolymer and from 20 to 50 pbw nitrile rubber are thermoplastic elastomers. These elastomers exhibit improved abrasion resistance and compression set properties, and have good oil resistance.Type: GrantFiled: May 28, 1986Date of Patent: October 27, 1987Assignee: Borg-Warner Chemicals, Inc.Inventors: Claudio Giori, Stamatios G. Mylonakis
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Patent number: 4703084Abstract: Compositions comprising a vinyl aromatic compound-acrylonitrile copolymer, a nitrile rubber and a graft copolymer thereof possess good rubbery characteristics and are processible as thermoplastics with low mold shrinkage.Type: GrantFiled: May 28, 1986Date of Patent: October 27, 1987Assignee: Borg-Warner Chemicals, Inc.Inventors: Claudio Giori, Stamatios G. Mylonakis
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Patent number: 4692295Abstract: Thermoplastic resin compositions comprising a thermoplastic resin capable of biaxial orientation and an additive resin, having a molecular weight above 10.sup.6, compatible with said thermoplastic resin and selected from a homopolymer of a vinyl monomer or a copolymer of at least two vinyl monomers.Type: GrantFiled: September 9, 1985Date of Patent: September 8, 1987Assignee: Produits Chimiques Ugine KuhlmannInventor: Bernard Vinatier
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Patent number: 4690975Abstract: Disclosed is a method for producing a rubber modified thermoplastic resin excellent in surface appearance and various properties and high in commercial values which comprises removing an aqueous phase from a two-phase mixture comprises a graft rubber polymer latex (1) obtained by graft polymerization of vinyl monomer on a rubber latex, a thermoplastic resin (2) and an organic agent in an amount of 0.2 to 6 times the weight of all the polymers (3) which is capable of dissolving said thermoplastic resin (2) and has a solubility in water of 5 to 50% by weight at 25.degree. C. and then removing said organic agent and remaining water from the remaining organic phase by a thermal means.Type: GrantFiled: May 27, 1986Date of Patent: September 1, 1987Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Teruhiko Sugimori, Noriyuki Tajiri, Yutaro Fukuda
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Patent number: 4690976Abstract: A polymer resin comprising a blend of an olefin polymer, such as polyethylene, a monovinylidene aromatic polymer, such as polystyrene, and a grafted, block copolymer compatibilizing agent. The compatibilizing agent comprises an .alpha.-olefin copolymer substrate grafted with amounts of monovinylidene aromatic polymer. Preferably, the .alpha.-olefin copolymer substrate is a terpolymer of ethylene, propylene and a non-conjugated diolefin. This thermoplastic material has very desirable property combinations, combining the desirable properties from the olefinic and monovinylidene aromatic polymers. The blend can be shaped into final products by thermoforming techniques yet possesses many desirable polyolefin properties such as environmental stress crack resistance.Type: GrantFiled: January 21, 1986Date of Patent: September 1, 1987Assignee: The Dow Chemical CompanyInventor: Jerry L. Hahnfeld
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Patent number: 4690974Abstract: Disclosed is a method for producing a rubber modified thermoplastic resin excellent in surface appearance and various properties and high in commercial values which comprises removing an aqueous phase from a two-phase mixture comprising a graft rubber polymer latex (1) obtained by graft polymerization of vinyl monomer on a rubber latex, a thermoplastic resin (2), an organic agent in an amount of 0.1 to 6 times the weight of all the polymers (3) which is capable of dissolving said thermoplastic resin (2) and has a solubility in water of 5% by weight or less at 25.degree. C. and a water soluble agent in an amount of 10% by weight or less of said graft rubber polymer which can coagulate said latex and then removing said organic agent and remaining water from the remaining organic phase by a thermal means.Type: GrantFiled: May 20, 1986Date of Patent: September 1, 1987Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Teruhiko Sugimori, Noriyuki Tajiri, Yutaro Fukuda
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Patent number: 4690977Abstract: A vinyl chloride polymer composition comprising(A) 3 to 50 parts by weight of a grafted copolymer and(B) 97 to 50 parts by weight of a vinyl chloride polymer, a total amount of the copolymer (A) and the polymer (B) being 100 parts by weight; the grafted copolymer (A) comprising(1) 50 to 80 parts by weight of a rubber copolymer and(2) 50 to 20 parts by weight of a grafting monomer, a total amount of the component (1) and the component (2) being 100 parts by weight; the component (1) comprising(a) 60 to 90% by weight of the rubber copolymer comprising 99 to 85% by weight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 1 to 15% by weight of conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and(b) 40 to 10% by weight of a surface rubber copolymer comprising 98 to 70% by weight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 2 to 30% by weight of conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and being obtained by polymeType: GrantFiled: August 20, 1986Date of Patent: September 1, 1987Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Hideki Hosoi, Toshihiko Hasegawa, Taizo Aoyama
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Patent number: 4689367Abstract: This invention provides a high molecular weight copolymer blend of polyethylene and poly(para-methylstyrene) in the absence of any compatibilizing agent. Preferably, the polyethylene is linear low density polyethylene.Type: GrantFiled: March 4, 1986Date of Patent: August 25, 1987Assignee: Mobil Oil CorporationInventors: Binnur Z. Gunesin, Alex W. Kawczak
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Patent number: 4686263Abstract: The production of impact-resistant polystyrene with EPDM simplifies the process and produces improved products if a modified ethylene/propylene rubber consisting of styrene/butadiene- or diene polymers, ethylene, optionally propylene and an unconjugated diene are used as the elastifying component.The modified EPDM rubbers consisting of (a) from 20 to 90% by weight of ethylene units, (b) from 1 to 25% by weight of units of a butadiene/styrene copolymer containing a quantity of from 10 to 90% by weight of styrene, (c) from 0 to 10% by weight of units of an unconjugated diolefin and (d) C.sub.3 -C.sub.18 .alpha.-monolefin units to make up the difference to 100% by weight, are a further subject of this invention.Type: GrantFiled: July 22, 1985Date of Patent: August 11, 1987Assignee: Bayer AktiengesellschaftInventors: Manfred Beck, Wolfgang Nentwig
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Patent number: 4661549Abstract: Graft polymers are prepared by reacting an ethylenically unsaturated polymerizable monomer with a polymer of an olefin of 2 to about 8 carbon atoms in a process wherein the olefin polymer is substantially insoluble in the monomer but is capable of absorbing the monomer. In a preferred aspect, a vinyl halide polyolefin graft polymer is produced by reacting a solid polyolefin particle with a vinyl halide monomer in which the polyolefin is substantially insoluble, but is capable of absorbing the monomer. The solid particles can be contacted with the monomer in one step or in stages. When the stage-wise reaction is continued until the proportion of polyolefin in the polymer product is about 2 to about 20 weight percent, the resulting product can be formed to a transparent or translucent article.Type: GrantFiled: October 12, 1983Date of Patent: April 28, 1987Assignee: Occidental Chemical CorporationInventor: Leigh E. Walker
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Patent number: 4657974Abstract: A flame-retardant resin composition comprising:(a) a copolymer obtained by copolymerizing from 65 to 80% by weight of .alpha.-methylstyrene, from 15 to 30% by weight of acrylonitrile and from 0 to 30% by weight of a monomer copolymerizable therewith and having a number average molecular weight of from 15,000 to 80,000;(b) a graft copolymer obtained by copolymerizing from 20 to 70 parts by weight of a monomer mixture of from 50 to 80% by weight of styrene, from 15 to 35% by weight of acrylonitrile and from 0 to 30% by weight of other vinyl compound copolymerizable therewith in the presence of from 30 to 80 parts by weight of a rubber having a glass transition temperature of not higher than 0.degree. C.Type: GrantFiled: October 1, 1985Date of Patent: April 14, 1987Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Yuichiro Kushida, Shigenobu Tago, Tatsuhiro Aoyagi
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Patent number: 4657976Abstract: This invention relates to thermoplastic moulding compositions of vinyl chloride polymers, certain graft polymers, certain resin-like copolymer additives and certain rubber-like copolymers for the production of films having improved resistance to ageing.Type: GrantFiled: July 25, 1983Date of Patent: April 14, 1987Assignee: Bayer AktiengesellschaftInventors: Karl-Heinz Ott, Christian Lindner, Walter Uerdingen, Hans-Eberhard Braese, Helmut Hurnik
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Patent number: 4645795Abstract: A vinyl chloride polymer composition comprising (A) 3 to 50 parts by weight of a grafted copolymer and (B) 97 to 50 parts by weight of a vinyl chloride polymer, a total amount of the copolymer (A) and the polymer (B) being 100 parts by weight; the grafted copolymer (A) comprising(1) 50 to 80 parts by weight of a rubber copolymer and(2) 50 to 20 parts by weight of a grafting monomer, a total amount of the component (1) and the component (2) being 100 parts by weight;the component (1) comprising(a) 60 to 90% by weight of the rubber copolymer comprising 99 to 85% by weight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 1 to 15% by weight of conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and(b) 40 to 10% by weight of a surface rubber copolymer comprising 98 to 70% by weight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 2 to 30% by weight of conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and being obtained by polymType: GrantFiled: April 8, 1985Date of Patent: February 24, 1987Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Hideki Hosoi, Toshihiko Hasegawa, Taizo Aoyama
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Patent number: 4645796Abstract: Novel and particularly utile for many specific and extraordinarily-demanding applications intimately-blended admixtures of diverse synthetic resinous copolymers and graft-structured and/or the like or equivalent elastomer-based polymerizates are comprised of thoroughly intermixed products of polymerization (i.e., "polyblends") of: (i) copolymer(s) of styrene/.alpha.-methylstyrene and equivalents thereof with (ii) grafted rubber concentrates of an elastomeric substrate or backbone having thereon and thereto graft-interpolymerized styrene components therein and/or like or equivalent grafted rubber concentrate component(s). The polyblends involved exhibit superior and much-improved properties and characteristics of thermal stability, environmental stress crack resistance, hardness and so forth.Type: GrantFiled: March 14, 1986Date of Patent: February 24, 1987Assignee: The Dow Chemical CompanyInventors: Douglas E. Beyer, Edward T. Carrington
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Patent number: 4639473Abstract: Thermoplastic, high-impact moulding compositions of (A) 5 to 80 parts by weight of a graft product of 70 to 30% by weight of a mixture of an aromatic vinyl compound and acrylonitrile and/or methacrylonitrile on 30 to 70% by weight of a rubber having a glass transition temperature of below -10.degree. as the graft base and (B) 20 to 95 parts by weight of a terpolymer of styrene and/or .alpha.-methylstyrene, p-methylstyrene and acrylonitrile and/or methacrylonitrile, the terpolymer having been produced by mass polymerization.Type: GrantFiled: November 22, 1985Date of Patent: January 27, 1987Assignee: Bayer AktiengesellschaftInventors: Frank Wingler, Otto Koch, Joachim Doering, Karl-Heinz Ott, Lothar Liebig
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Patent number: 4612348Abstract: The specification discloses a method for forming a rubber concentrate which can be incorporated in relatively high percentages into rubber reinforced polymers without adversely affecting processability. A rigid polymer forming monomer system is polymerized in the presence of a mixture of a low molecular weight rubber (weight average molecular weight of from about 2,000 to about 50,000) and a higher molecular weight rubber (weight average molecular weight of from about 100,000 to about 400,000). The resulting rubber concentrate can be incorporated into a rigid polymer blend which is compatible with the rigid polymer forming monomer phase of the rubber concentrate. The resulting new composition has significantly improved impact strength and acceptable processability.Type: GrantFiled: December 13, 1984Date of Patent: September 16, 1986Assignee: The Dow Chemical CompanyInventor: Yun C. Sun
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Patent number: 4605704Abstract: Graft polymers are prepared by reacting an ethylenically unsaturated polymerizable monomer with a polymer of an olefin of 2 to about 8 carbon atoms in a process wherein the olefin polymer is substantially insoluble in the monomer but is capable of absorbing the monomer. In a preferred aspect, a vinyl halide polyolefin graft polymer is produced by reacting a solid polyolefin particle with a vinyl halide monomer in which the polyolefin is substantially insoluble, but is capable of absorbing the monomer. The solid particles can be contacted with the monomer in one step or in stages. When the stage-wise reaction is continued until the proportion of polyolefin in the polymer product is about 2 to abut 20 weight percent, the resulting product can be formed to a transparent or translucent article.Type: GrantFiled: October 12, 1983Date of Patent: August 12, 1986Assignee: Occidental Chemical CorporationInventors: David W. Eastman, Leigh E. Walker
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Patent number: 4598124Abstract: An ABS polymer comprising (A) a graft copolymer formed by graft polymerizing styrene and acrylonitrile monomers onto an initially ungrafted, low gel diene rubber and (B) a copolymer of said grafted monomers in which said graft copolymer is dispersed; said diene rubber comprising 3 to 25% by weight of such polymer with the polymerized acrylonitrile content thereof being 27 to 40% by weight.Type: GrantFiled: August 29, 1983Date of Patent: July 1, 1986Assignee: Monsanto CompanyInventors: Vincent A. Aliberti, Robert L. Kruse, Eduardo M. Valcarce
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Patent number: 4563505Abstract: A process for producing a thermoplastic resin by polymerizing a monomer mixture consisting of an unsaturated nitrile monomer and an alkenyl aromatic hydrocarbon monomer in the presence of a rubbery polymer latex, characterized in that(a) at first, a monomer mixture having an unsaturated nitrile monomer content of 0 to 20 weight % is polymerized in an amount of 30 to 70 weight % based on the amount of the whole monomer mixture,(b) subsequently, the residual monomer mixture having an unsaturated nitrile monomer content of 35 to 90 weight % is polymerized, and the unsaturated nitrile monomer content in the polymer part formed by polymerization in said (a) and (b) steps is 28 to 38 weight %. The thermoplastic resin obtained according to this process has a high chemical resistance, an excellent impact resistance and an excellent processability.Type: GrantFiled: September 14, 1983Date of Patent: January 7, 1986Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Mitsuo Abe, Seiichi Atomori, Tadahiko Tsutsumi, Masahiko Noro
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Patent number: 4559386Abstract: An intermediate for use in a polyblend consisting essentially of a copolymer of monoalkenyl aromatic monomer such as styrene and a ethylenically unsaturated nitrile monomer such as acrylonitrile surface grafted onto rubber which is dispersed in a matrix copolymer of the graft copolymer monomers, the dispersed phase being monomodal in particle size distribution and the weight percent of surface-grafted nitrile monomer being less by at least 2% than the weight percent nitrile monomer in the matrix. This intermediate with mismatched nitrile monomer can be blended with another rubber graft copolymer of different particle size dispersed in ungrafted matrix which contains matched nitrile monomer in the surface graft and matrix to provide a polyblend having properties at least equivalent to those obtained by blending two rubber graft copolymers of different particle size dispersed in a matrix which each contain matched nitrile monomer levels in the surface graft and matrix.Type: GrantFiled: July 6, 1984Date of Patent: December 17, 1985Assignee: Monsanto CompanyInventor: Wan C. Wu
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Patent number: 4555546Abstract: Compatibilized polymer blends are described comprising a blend of olefin polymer, cross-linkable acrylic ester copolymer rubber, and a compatibilizing amount of a graft copolymer comprising acrylic ester copolymer compatibilizing segments and olefin polymer compatibilizing segments.Type: GrantFiled: November 27, 1984Date of Patent: November 26, 1985Assignee: Monsanto CompanyInventor: Raman Patel
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Patent number: 4536546Abstract: A novel methacrylate-based composition is disclosed. The composition is preferably used as an adhesive. The composition comprises an acrylate-based or methacrylate-based ester monomer, a catalyst, a chlorinated or chlorosulfonated polyethylene polymer resin and a graft co-polymer resin. The chlorinated polyethylene polymer resin used includes organic sulfonyl chloride. The composition preferably further includes an acrylate-based or methacrylate-based acid monomer, and a catalyst activator. A preferred chlorosulfonated polyethylene polymer resin contains about 43 weight percent chlorine, about 1.1 weight percent sulfur, and about 34 millimoles sulfonyl chloride moiety per 100 grams thereof. Preferred graft co-polymer resins are ABS, MBS, MABS, ASA, all-acrylic, SA EPDM and MAS. More-preferred graft co-polymer resins are MABS, ASA, all-acrylic and MBS. Most-preferred graft co-polymer resins are MABS and ASA. A preferred methacrylate-based acid monomer is methacrylic acid.Type: GrantFiled: September 22, 1983Date of Patent: August 20, 1985Assignee: Illinois Tool Works Inc.Inventor: Paul C. Briggs
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Patent number: 4526928Abstract: An .alpha.-methylstyrene high-content copolymer which is characterized by that it is a copolymer which comprises 65-90 parts by weight of .alpha.-methylstyrene with 35-10 parts by weight of acrylonitrile and 0-5 parts by weight of a copolymerizable vinyl monomer or monomers and that a component having an .alpha.-methylstyrene content of 82% or higher is contained in an amount of 30 parts by weight or more. Such a copolymer may be produced by a process which comprises charging 65 parts by weight or more of .alpha.-methylstyrene and 10% by weight or less based on this .alpha.-methylstyrene of acrylonitrile and a vinyl monomer or monomers all in one portion at the initial stage, making the system fully emulsified, gradually adding 35 parts by weight or less of acrylonitrile and the vinyl monomer or monomers, and carrying out emulsion polymerization until the amount of a polymer produced has amounted to 50 parts by weight or more in such way that the ratio of the .alpha.Type: GrantFiled: January 14, 1983Date of Patent: July 2, 1985Assignee: Kanegafuchi Kagaku Kogyo KabushikiInventors: Shigemi Mathumoto, Fumiya Nagoshi
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Patent number: 4525530Abstract: Thermoplastic resin compositions which comprise 20-70 parts by weight of a polyvinyl chloride resin and 80-30 parts by weight of a mixed composition of the following copolymers (A) and (B) at the following ratio:(A) 90-50% by weight of a copolymer which comprises 65-90 parts by weight of .alpha.-methylstyrene with 35-10 parts by weight of acrylonitrile and 0-5 parts by weight of a copolymerizable vinyl monomer and contains 30 parts by weight or more of a component having an .alpha.-methylstyrene content of 82% by weight or higher; and(B) 10-50% by weight of a graft copolymer obtained by reacting 35-80% by weight of a conjugated diene rubber and 65-20% by weight of a monomer comprising a monovinyl aromatic compound, an unsaturated nitrile compound or an alkyl methacrylate.These compositions have greatly improved heat resistance, especially resistance to heat distortion, and impact resistance over those of polyvinyl chloride resins.Type: GrantFiled: August 22, 1983Date of Patent: June 25, 1985Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Sigemi Mathumoto, Hidetaka Kubota, Fumiya Nagoshi
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Patent number: 4520165Abstract: This invention relates to thermoplastic moulding compositions of the ABS-type produced in emulsion and having improved properties in relation to known ABS-moulding compositions, particularly extreme toughness coupled with ready processibility and high surface gloss.Type: GrantFiled: January 30, 1984Date of Patent: May 28, 1985Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Karl-Heinz Ott, Adolf Schmidt, Alfred Pischtschan
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Patent number: 4511695Abstract: The invention relates to soft polymer alloys based on graft polymers and crosslinked, particulate acrylate copolymers which are suitable for the production of flexible moulding compositions having increased resistance to ageing and better resistance to solvents.Type: GrantFiled: March 28, 1984Date of Patent: April 16, 1985Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Hans-Eberhard Braese, Karl-Heinz Ott, Walter Uerdingen
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Patent number: 4510287Abstract: An intermediate for use in a polyblend consisting essentially of a copolymer of monoalkenyl aromatic monomer such as styrene and a ethylenically unsaturated nitrile monomer such as acrylonitrile surface grafted onto rubber which is dispersed in a matrix copolymer of the graft copolymer monomers, the dispersed phase being monomodal in particle size distribution and the weight percent of surface-grafted nitrile monomer being less by at least 2% than the weight percent nitrile monomer in the matrix. This intermediate with mismatched nitrile monomer can be blended with another rubber graft copolymer of different particle size dispersed in ungrafted matrix which contains matched nitrile monomer in the surface graft and matrix to provide a polyblend having properties at least equivalent to those obtained by blending two rubber graft copolymers of different particle size dispersed in a matrix which each contain matched nitrile monomer levels in the surface graft and matrix.Type: GrantFiled: November 21, 1983Date of Patent: April 9, 1985Assignee: Monsanto CompanyInventor: Wan C. Wu
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Patent number: 4507435Abstract: The clarity of blends of polyvinyl chloride (PVC) and acrylonitrile-butadiene-styrene graft copolymer (ABS) is improved by the use of a para-methyl styrene-acrylonitrile copolymer (PMS-AN) as an additive or by substituting acrylonitrile-butadiene-para-methyl styrene graft copolymer (ABPMS) for ABS.Type: GrantFiled: December 27, 1983Date of Patent: March 26, 1985Assignee: Mobil Oil CorporationInventor: Edmond L. Suek
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Patent number: 4504625Abstract: A thermoplastic resin composition is provided which comprises 10 to 90 wt % of an iminated copolymer prepared by reacting ammonia and/or a primary amine with a graft copolymerization product obtained by graft-copolymerizing a rubber-like polymer with a monomer mixture containing an aromatic vinyl monomer and an unsaturated dicarboxylic acid anhydride and 10 to 90 wt % of a graft-copolymer obtained by graft-copolymerizing a rubber-like polymer with a monomer mixture containing an aromatic vinyl monomer and/or a polymer obtained by polymerizing an aromatic vinyl monomer.Type: GrantFiled: June 4, 1982Date of Patent: March 12, 1985Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tomoyuki Kitsunai, Kiyotaka Saito, Shozo Hori
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Patent number: RE32217Abstract: Mass graft copolymerization carried out in an extrusion passageway having a sealing zone to prevent back flow of grafting material introduced to the extrusion passageway downstream of the sealing zone.Type: GrantFiled: July 25, 1985Date of Patent: July 29, 1986Assignee: The Dow Chemical CompanyInventor: Paul G. Andersen