Specified Material Contains Silicon Atom Patents (Class 525/254)
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Patent number: 6136926Abstract: Cross-linkable, olefinic polymers synthesized from mixtures of olefinic polymers and ethylenically unsaturated organosilane compounds, which can be grafted, by a 2-step method using thermally decomposing free radical-forming agents by heating the mixtures to a temperature of 30.degree. to 110.degree. C. below the softening temperature or the crystallite melting point of the olefinic polymers used and subsequently heating the mixtures to a reaction temperature of 10.degree. to 60 .degree. C. below the softening temperature or the crystallite melting point of the olefinic polymers used. In the alternative, they can be grafted by a method involving the action of ionizing radiation with simultaneous absorption of organosilane compounds and the action of radiation. The method is suitable for producing films, sheets, fibers, panels, coatings, pipes, hollow objects, foamed materials and molded articles.Type: GrantFiled: July 22, 1997Date of Patent: October 24, 2000Assignee: Borealis GmbHInventors: Manfred Raetzsch, Achim Hesse, Harmut Bucka, Dirk Leistner, Sergej Ivanchev, Saul Heikin, Alla Mesh, Moisej Pukschanski
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Patent number: 6087456Abstract: A curable composition comprising the components (A), (B), (C) and (D), viz.(A) an isobutylene polymer which contains in a molecule, at least one alkenyl group capable of hydrosilylation reaction;(B) a curing agent which contains at least two hydrosilyl groups in a molecule;(C) a hydrosilylation catalyst; and(D) an organic compound which contains in a molecule, at least one alkenyl or alkynyl group capable of hydrosilylation reaction.This composition is excellent in workability because of its low viscosity, and has such advantages that the cured product thereof has large strength and further that the weight loss by heating is small. Since a large amount of an inorganic filler can be blended with this composition, it is possible to obtain a composition having high thixotropy and little sagging.Type: GrantFiled: November 25, 1997Date of Patent: July 11, 2000Assignee: Kaneka CorporationInventors: Masashi Sakaguchi, Yoshimichi Yamanaka, Makoto Chiba, Toshihiko Okamoto, Yuriko Asai, Jyunji Takase
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Patent number: 5880234Abstract: The invention relates to a curable fluorine-containing copolymer prepared by copolymerizing a monomer mixture. This monomer mixture is in an amount of 100 mol % in total and includes (a) 10-60 mol % of a first polymerizable monomer that is one of hexafluoroisobutene and hexafluoroacetone, each of which has one hexafluoroisopropylidene group; (b) 10-70 mol % of a fatty acid vinyl ester that is represented by a general formula of CH.sub.2 .dbd.CH--OC (.dbd.O) --R.sup.1 where R.sup.1 is one of an alkyl group and --(CH.sub.2).sub.m --R.sup.2 --(CH.sub.2).sub.n --H where R.sup.Type: GrantFiled: April 1, 1997Date of Patent: March 9, 1999Assignee: Central Glass Company, LimitedInventors: Kazuhiko Maeda, Yukio Ikeda, Kentaro Tsutsumi, Yutaka Maruyama, Shuyo Akama, Michitaka Ohtani
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Patent number: 5844046Abstract: A process for preparing an olefin polymer comprising the steps of: preparing an olefin polymer ?I! by polymerizing or copolymerizing an olefin in the presence of an olefin poymerization catalyst comprising a specific solid titanium catalyst component ?A!, a specific organoaluminum compound catalyst component ?B! and a specific electron donor catalyst component ?C!; preparing an olefin polymer ?II! by polymerizing or copolymerizing an olefin in an polymerizer different from that for the polymerization of the above step in the presence of an olefin poymerization catalyst comprising a specific solid titanium catalyst component ?A!, a specific organoaluminum compound catalyst component ?B! and a specific electron donor catalyst component ?D!; and then allowing the resulting olefin polymer ?I! and the resulting olefin polymer ?II! to coexist in one polymerizer to further polymerize or copolymerize an olefin.Type: GrantFiled: March 5, 1997Date of Patent: December 1, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masaaki Ohgizawa, Mamoru Kioka
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Patent number: 5804662Abstract: Agglomerated, finely divided, crosslinked vinylimidazole copolymers obtainable by free-radically initiated polymerization of N-vinylimidazoles of the formula ##STR1## where R, R.sup.1 and R.sup.2 are identical or different and each is H, C.sub.1 -C.sub.Type: GrantFiled: August 19, 1997Date of Patent: September 8, 1998Assignee: BASF AktiengesellschaftInventors: Christian Schade, Karl-Heinrich Schneider
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Patent number: 5744560Abstract: A free radical polymerization process for the preparation of a polymer comprising heating a mixture of a free radical initiator, a stable free radical agent, a metal catalyst, or a metal stable free radical complex catalyst, and at least one polymerizable monomer; cooling said mixture; and optionally isolating said polymer.Type: GrantFiled: January 21, 1997Date of Patent: April 28, 1998Assignee: Xerox CorporationInventors: Daniel A. Foucher, Paula J. MacLeod, Michael K. Georges, Timothy E. Burrow
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Patent number: 5693713Abstract: A method of producing graft block copolymers which comprises (a) grafting a halosilane of the formulaHSiX.sub.n R.sub.3-nwherein X is halogen, R is alkyl or aryl, and n=1-3, onto a .alpha.-olefin/diene copolymer made from at least one .alpha.-olefin and at least one diene, (b) anionically polymerizing at least one anionically polymerizable monomer to form living polymer chains, and (c) reacting the products of (a) and (b) together wherein the living polymer chains react with the halosilane groups on the .alpha.-olefin/diene copolymer and are added thereto as pendant side chains.Type: GrantFiled: May 30, 1995Date of Patent: December 2, 1997Assignee: Shell Oil CompanyInventors: Ronald James Hoxmeier, Bridget Ann Spence, Robert Charles Job
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Patent number: 5659058Abstract: A process for rendering polymer compositions antistatic and the products of such process are described. The polymeric material is treated with a combination of selected trineoalkoxy amino zirconates and trineoalkoxy sulfonyl zirconates. These latter materials are soluble in the polyolefins, polyesters, polyamides, polyethers, polycarbonates, and polystyrenes and remain stable during the processing of these polymers. Furthermore, the antistatic agents of the invention are thermally stable to temperatures up to 825.degree. F., do not "bloom" during the polymer processing, and are colorless, permanent, non-blooming and non-moisture dependent.Type: GrantFiled: May 31, 1995Date of Patent: August 19, 1997Assignee: Kenrich Petrochemicals, Inc.Inventor: Salvatore Joseph Monte
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Patent number: 5500294Abstract: This invention is to provide a liquid adhesive can be adhered and cured at a relatively low temperature and have sufficient heat resistance and reliability, etc., and an adhesive tape using the same. The liquid adhesive of this invention is obtainable by dissolving(a) a butadiene-acrylonitrile copolymer having piperazinylethylaminocarbonyl groups at both terminals and having a weight average molecular weight of 1,000-50,000, and an acrylonitrile content of 5-50% by weight, represented by the following formula (I): ##STR1## wherein, m=50-95, and n=5-50; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in the range of 10 to 900 parts by weight. This is applied to one or both surfaces of a heat resistant film or one surface of a release film to form an adhesive layer, thereby obtaining an adhesive tape for electronic parts.Type: GrantFiled: October 20, 1994Date of Patent: March 19, 1996Assignee: Tomoegawa Paper Co., Ltd.Inventors: Yukinori Sakumoto, Takeshi Hashimoto, Katsuji Nakaba, Masaharu Kobayashi, Takeshi Nishigaya, Fumiyoshi Yamanashi
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Patent number: 5473021Abstract: A process for producing ethylene-propylene block copolymer which comprises(1) The first step of reacting propylene or a mixture of propylene and ethylene in the presence of a catalyst composed essentially of(A) a solid catalyst component containing magnesium, titanium and a halogen as the indispensable ingredients,(B) an organoaluminum compound, and(C) a silicon compound (1) represented by the formula R.sup.1 R.sup.2 Si(OR.sup.3).sub.2, wherein R.sup.1 is an alicyclic hydrocarbon group of 5-20 carbon atoms and R.sup.2 and R.sup.Type: GrantFiled: January 3, 1994Date of Patent: December 5, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Hiroyuki Koura, Takeshi Ebara, Kazuki Wakamatsu, Shozo Kawamata, Yoshizumi Sasaki
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Patent number: 5449738Abstract: The present invention relates to a process for producing ethylene propylene block copolymers excellent in appearance, elongation and impact resistance when molded by a gas phase polymerization which can be conducted in a stable manner.The process of the present invention comprises the first step of polymerizing propylene by using a catalyst system composed essentially of(A) a solid catalyst component containing magnesium, titanium, and a halogen as the indispensable ingredients,(B) an organoaluminum compound, and(C) a silicon compound represented by the formula R.sup.1 R.sup.2 Si(OR.sup.3).sub.2, wherein R.sup.1 is an alicyclic hydrocarbon group and R.sup.2 and R.sup.3 are each a hydrocarbon group, to form a propylene homopolymer, and the second step of then polymerizing ethylene and propylene with further addition of a silicon compound represented by the formula R.sup.4 R.sup.5.sub.a Si(OR.sup.6).sub.3-a, wherein R.sup.4 is an aromatic hydrocarbon group, R.sup.Type: GrantFiled: July 1, 1992Date of Patent: September 12, 1995Assignee: Sumitomo Chemical Company, Ltd.Inventors: Hiroyuki Koura, Takeshi Ebara, Kazuki Wakamatsu, Shouzou Kawamata, Yoshizumi Sasaki
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Patent number: 5446093Abstract: A process is disclosed for producing six-armed and eight-armed asymmetric radial block copolymers. The process comprises anionically polymerizing a diene and/or a vinyl aromatic hydrocarbon to create living polydiene and/or vinyl aromatic hydrocarbon arms, sequentially anionically polymerizing a vinyl aromatic hydrocarbon and a diene to create living block copolymer arms and coupling the two sets of arms together in one step with a coupling agent that will couple six or eight arms, wherein the molar ratio of the vinyl aromatic hydrocarbon-diene arms to the polydiene arms is sufficient to produce a statistical blend with less than 5 weight percent homopolydiene.Type: GrantFiled: November 10, 1993Date of Patent: August 29, 1995Assignee: Shell Oil CompanyInventors: Ronald J. Hoxmeier, Bridget A. Spence, Steven S. Chin, Michael A. Masse
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Patent number: 5387643Abstract: In present invention, cationic particle having two-layer structure wherein copolymerized resin comprising a specific copolymer is protected with a film of water soluble resin is contained in aqueous medium. In this way, a glossy film can be obtained by employing the composition of the cationic micro-emulsion; moreover, this film is superior in waterproof, weatherproof, and the like. This composition of the cationic micro-emulsion is effective as top coat material for painting, sealer, and the like.Type: GrantFiled: February 17, 1994Date of Patent: February 7, 1995Assignee: National Starch and Chemical Investment Holding CorporationInventor: Masao Maegawa
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Patent number: 5374684Abstract: Clusters of water-swellable polymer particles, having high rates of absorbency without gel-blocking are prepared by suspending water-swellable polymer particles in an inert hydrophobic liquid, such as hydrocarbon, and slowly adding to the particles a suspension of an aqueous solution optionally containing an .alpha.,.beta.-ethylenically unsaturated monomer in an inert hydrophobic liquid.Type: GrantFiled: September 1, 1993Date of Patent: December 20, 1994Assignee: The Dow Chemical CompanyInventor: Eva F. Tai
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Patent number: 5336725Abstract: A method for preparing a graft copolymer is here disclosed which is characterized by comprising the step of carrying out a living polymerization of at least one (meth)acrylic ester by the use of a polymeric compound as an initiator having one or more units represented by the following formula (I) in a molecular chain substantially in the absence of water in the presence of a Lewis acid or a donor compound of an anion selected from the group consisting of HF.sub.2.sup.-, (CH.sub.3).sub.3 SiF.sub.2.sup.- and F.sup.- : ##STR1## wherein R is hydrogen or an alkyl group having 1 to 6 carbon atoms, and R' is an alkyl group having 1 to 12 carbon atoms.Type: GrantFiled: June 19, 1992Date of Patent: August 9, 1994Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Seiji Tone, Akira Nakata, Naoki Yamamoto
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Patent number: 5292791Abstract: The mixture consists of at least one organic peroxide, at least one hydroquinone derivative of the general formulae I and/or II and/or III ##STR1## wherein R and R.sup.1, which may be identical or different, stand for H or t-alkyl, and X stands, for example, for C.sub.1-18 -alkylene, and a crosslinkage promoter, and permits the crosslinkage of polymers and at the same time extends the scorch time, which must be understood as the processing time.Type: GrantFiled: June 25, 1993Date of Patent: March 8, 1994Assignee: ELF Atochem North America, Inc.Inventors: Jurgen Groepper, Harald Hofmann
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Patent number: 5276115Abstract: A process for the polymerization of olefins in the presence of hydrogen comprising contacting the olefin, a cyclopentadienyl compound and a catalyst comprising a transition metal compound at polymerization conditions.Type: GrantFiled: December 14, 1992Date of Patent: January 4, 1994Assignee: Phillips Petroleum CompanyInventors: Robert W. Bohmer, M. Bruce Welch, Kenneth L. Anderson
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Patent number: 5266649Abstract: Diene polymers comprising at least one diene polymer block and at least one other polymer block which are coupled together with a coupling agent of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are alkyl or alkoxy containing up to 20 carbon atoms or more and at least of them are alkoxy. Adhesive formulations containing such polymers are also within the scope of the invention.Type: GrantFiled: June 1, 1992Date of Patent: November 30, 1993Assignee: Shell Oil CompanyInventors: Jaroslav G. Balas, Jeffrey G. Southwick
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Patent number: 5262487Abstract: Propylene is copolymerized with ethylene in solvent-free polymerization in two steps where a resinous polymer is produced in the first step and a rubbery polymer is produced in the second step over a Ziegler catalyst whose solid catalyst component has undergone preliminary polymerization of an .alpha.-olefin in the absence of an organoaluminum compound. The solid catalyst components is specified. Less sticky polymer powder is obtainable.Type: GrantFiled: July 23, 1992Date of Patent: November 16, 1993Assignee: Mitsubishi Petrochemical Company LimitedInventors: Takashi Fujita, Naohiro Yamamoto
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Patent number: 5250629Abstract: There is provided a process for producing a styrenic graft copolymer which comprises coplymerizing a styrenic monomer and a styrenic monomer having a hydrocarbon radical with an unsaturated bond in the presence of a catalyst comprising as primary ingredient (A) a transition metal compound and (B) a contact product of an organoaluminum compound and a condensation agent or (C) a compound which produces an ionic complex by reacting with the above-mentioned transition metal compound and subsequently graft polymerizing an ethylenically unsaturated monomer onto the resultant styrenic copolymer.The above-described styrenic graft copolymer is greatly improved in terms of compatibility, adhesivity, coatability and wettability while preserving heat resistance and chemical resistance thereof, and thus effective as a variety of constructional materials and compatibilizing agents.Type: GrantFiled: December 6, 1991Date of Patent: October 5, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Noriyuki Tani, Shuji Machida, Toshinori Tazaki
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Patent number: 5247021Abstract: Disclosed is a process for preparing an isobutylene-type allyl-terminated polymer, the process comprising mixing:(A) a cationically polymerizable isobutylene-containing monomer;(B) an organic compound serving as an initiator and concurrently as a chain transfer agent, the organic compound being represented by the formula (I) ##STR1## (C) at least one Lewis acid selected from the group consisting of (C.sub.2 H.sub.5).sub.2 AlCl, (C.sub.2 H.sub.5)AlCl.sub.2, SnCl.sub.4 and TiCl.sub.4 ; and(D) a compound serving as an end capping agent, the compound being represented by the formula (II) ##STR2## whereby the cationically polymerizable monomer is polymerized.Type: GrantFiled: August 27, 1992Date of Patent: September 21, 1993Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Hiroshi Fujisawa, Koji Noda
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Patent number: 5219938Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polymer having alkali metal end or ends, and reacting the alkali metal-containing polymer with (a) a silicon or tin compound of the formula: R.sub.a MX.sub.b wherein R is an alkyl group, an alkenyl group, a cycloalkenyl group or an aromatic hydrocarbon atom, a is 0, 1 or 2 and b is 2, 3 or 4, and (b) at least one member selected from the group consisting of a nitro compound; a phosphoryl chloride compound of the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are an alkyl group; an aminosilane compound of the formula (2): ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are an alkyl group or an alkoxyl group, R.sup.8 and R.sup.Type: GrantFiled: March 9, 1992Date of Patent: June 15, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Akio Imai, Tomoaki Seki, Keisaku Yamamoto
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Patent number: 5218014Abstract: A thermoplastic resin containing a graft copolymer obtained by graft-copolymerizing at least one vinyl monomer onto colloidal silica-core silicone-shell particles, and a process for producing the thermoplastic resin.A colloidal silica-core silicone-shell particles comprising(A) from 99.9 to 5% by weight of cores which are colloidal silica particles, and(B) from 0.1 to 95% by weight of shells comprising an organosiloxy group represented by the formula ##STR1## wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Q represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms, p is an integer of 1 to 3, and q is an integer of 0 to 2, with proviso that (p+q) is an integer of 1 to 3, and/or a polyorganosiloxane represented by the average composition formula ##EQU1## wherein R.sup.Type: GrantFiled: December 14, 1990Date of Patent: June 8, 1993Assignees: Toshiba Silicone Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Makoto Matsumoto, Junichiro Watanabe, Takashi Kurata, Noriaki Ijuin, Tateki Furuyama
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Patent number: 5189102Abstract: A method for producing a vinyl resin comprising the steps of dissolving or dispersing a polymerizable vinyl monomer in a polymerization solvent containing a silicone oil, and polymerizing the polymerizable vinyl monomer in the presence of a polymerization catalyst.Type: GrantFiled: March 4, 1992Date of Patent: February 23, 1993Assignee: Ricoh Company, Ltd.Inventors: Kazuo Tsubuko, Shinichi Kuramoto, Kazuhiko Umemura, Hidemi Uematsu, Okawara, Makoto
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Patent number: 5177148Abstract: Covulcanizable compositions comprising (A) 55-100% by weight of an elastomeric copolymer of vinylidene fluoride with perfluoropropene optionally tetrafluoroethylene and containing from 0.001 to 2% by weight of bromine; (B) 0-45% by weight of a tetrafluoroethylene and propylene copolymer; (C) 0.7-2.5 parts for 100 parts of mix (A)+(B) of a bisphenol compound; (D) 0.3-1.5 parts for 100 parts of mix (A)+(B) of an organic guaternary compound of ammonium, phosphonium or aminophosphonium; (E) 0.4-5 parts for 100 parts of mix (A)+(B) of an organic peroxide; (F) 1-5% by weight of (A)+(B) of a peroxide cross-linking coagent.Type: GrantFiled: August 23, 1990Date of Patent: January 5, 1993Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Giulio Tommasi, Giulio Brinati, Gianna Cirillo, Fabio Costanzi
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Patent number: 5128416Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polymer having alkali metal end or ends, and reacting the alkali metal-containing polymer with (a) a silicon or tin compound of the formula: R.sub.a MX.sub.b wherein R is an alkyl group, an alkenyl group, a cycloalkenyl group or an aromatic hydrocarbon group, M is silicon atom or tin atom, X is a halogen atom, a is 0, 1 or 2 and b is 2, 3 or 4, and (b) at least one member selected from the group consisting of a nitro compound; a phosphoryl chloride compound of the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are an alkyl group; an aminosilane compound of the formula (2): ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are an alkyl group or an alkoxyl group, R.sup.8 and R.sup.Type: GrantFiled: September 5, 1990Date of Patent: July 7, 1992Assignee: Sumitomo Chemical Company, LimitedInventors: Akio Imai, Tomoaki Seki, Keisaku Yamamoto
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Patent number: 5019634Abstract: Group Transfer Polymerization (GTP) process for preparing a "living" polymer, the process comprising contacting under polymerizing conditions in a polymerization medium, at least one acrylic or maleimide monomer with an initiator which is a tetracoordinate organosilicon, organotin or organogermanium compound having at least one GTP initiating site and a catalyst which is or is a source of an anion selected from the group consisting of bifluoride, fluoride, cyanide, azide or a selected oxyanion, or a selected Lewis acid or Lewis base, the process further characterized in that the initiator or the anion or Lewis acid catalyst is chemically attached (grafted) to a solid support that is insoluble in the polymerization medium.Type: GrantFiled: October 6, 1989Date of Patent: May 28, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventors: Fritz P. Boettcher, Ira B. Dicker, Richard C. Ebersole, Walter R. Hertler
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Patent number: 4990570Abstract: Disclosed is a curable rubber composition comprising (a) 100 parts by weight of an ethylenically unsaturated nitrile/conjugated diene type highly saturated rubber in which the content of conjugated diene units in the polymer chain is not higher than 30% by weight, (b) 10 to 100 parts by weight of zinc salt of methacrylic acid, (c) 5 to 50 parts by weight of silicic anhydride and (d) 0.2 to 10 parts by weight of an organic peroxide. The curable rubber composition provides a cured product having an excellent strength, abrasion resistance, and compression set.Type: GrantFiled: June 8, 1989Date of Patent: February 5, 1991Assignee: Nippon Zeon Co., Ltd.Inventors: Yoshiomi Saito, Akio Fujino, Atsumi Ikeda
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Patent number: 4935470Abstract: A highly transparent film having high strength, suitable extensibility, high weather resistance, low moisture absorption and so on is disclosed, which consists mainly of EVAT. And also various laminates making the most of the above properties of the film are disclosed, which comprise the EVAT interposed between two inorganic material sheets, two organic material sheets, or an inorganic material sheet and an organic material sheet.Type: GrantFiled: April 14, 1989Date of Patent: June 19, 1990Assignee: Bridgestone CorporationInventors: Itsuo Tanuma, Hideo Takeichi, Hiromi Ohtsuru, Toshio Honda
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Patent number: 4851477Abstract: Hybrid star polymers with functional acrylic arms made by group transfer polymerization and crosslinked cores made by condensation reactions with the functional groups on the arms.Type: GrantFiled: March 30, 1987Date of Patent: July 25, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventors: Clyde S. Hutchins, Harry J. Spinelli
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Patent number: 4847328Abstract: Hybrid star polymers with functional acrylic arms and crosslinked cores.Type: GrantFiled: March 30, 1987Date of Patent: July 11, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventors: Clyde S. Hutchins, Harry J. Spinelli
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Patent number: 4820775Abstract: A process for the production of .alpha.-olefin block copolymer particles having excellent impact resistance at low temperature and excellent molding and processing characteristics, is disclosed. The process includes a two step gas phase polymerization procedure under specific conditions in the presence of a specific catalyst system.Type: GrantFiled: May 23, 1986Date of Patent: April 11, 1989Assignee: Sumitomo Chemical Company LimitedInventors: Akinobu Shiga, Masahiro Kakugo, Hajime Sadatoshi, Hiroyuki Kora, Toshio Sasaki, Junpei Kojima, Kazuki Wakamatsu, Syozo Kawamata
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Patent number: 4794144Abstract: Large acrylic star polymers containing multifunctional monomers in the core are made by group transfer polymerization techniques, preferably by arm-first, core-first, or arm-core-arm approaches.Type: GrantFiled: September 30, 1986Date of Patent: December 27, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventor: Harry J. Spinelli
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Patent number: 4680319Abstract: Compositions based on silane-grafted olefin polymers which are cross-linkable after shaping and which contain from 0.1 to 10% by weight of crystalline zeolites in powder form and, preferably, also a cross-linking coagent consisting of an aryl-carboxilic acid and/or a cross-linking catalyst.Type: GrantFiled: April 29, 1985Date of Patent: July 14, 1987Assignee: Franco GimpelInventors: Franco Gimpel, Corrado Brichta
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Patent number: 4618656Abstract: A polymer which is prepared by polymerizing at least one ethylenically unsaturated monomer in the presence of an organic polymer having at least one reactive silicone group in a molecule and a compound having at least two independent ethylenically unsaturated functional groups in a molecule by use of a radical polymerization initiator having a reactive silicone group and/or a chain transfer agent having a reactive silicone group, which is cured with moisture to give a product having improved properties such as tensile properties and weather resistance.Type: GrantFiled: April 25, 1985Date of Patent: October 21, 1986Assignee: Kanegafuchi Chemical Industry Co., Ltd.Inventors: Fumio Kawakubo, Miyako Takanoo, Sadao Yukimoto, Katsuhiko Isayama
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Patent number: 4618653Abstract: A polymer which is prepared by polymerizing at least one polymerizable monomer in the presence of an organic polymer having a reactive silicone group and a polymerizable ethylenically unsaturated group in a molecule, the total number of the silicone group and the unsaturated group being on the average not less than 1.1 and the number of the ethylenically unsaturated group being on the average not less than 0.1 by use of a radical polymerization initiator having a reactive silicone group and/or a chain transfer agent having a reactive silicone group, which is cured with moisture to give a product having improved properties such as tensile properties and weather resistance.Type: GrantFiled: April 25, 1985Date of Patent: October 21, 1986Assignee: Kanegafuchi Chemical Industry Co., Ltd.Inventors: Fumio Kawakubo, Miyako Takanoo, Sadao Yukimoto, Katsuhiko Isayama
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Patent number: 4547552Abstract: A process for producing a chemically blended propylene polymer composition having an ethylene content ranging from 3 to 40% by weight and being greater than the weight of the rubbery propylene copolymer formed in stage (II) below, which comprises the following stages (I) and (II):(I) a first stage of polymerizing propylene containing 0 to 5 mole % of another olefin in the presence of a catalyst composed of (A) a solid titanium catalyst component consisting essentially of titanium, magnesium, halogen, and an electron donor, (B) an organoaluminum compound, and (C) an organic silicon compound having an Si--O--C bond or an Si--N--C bond to thereby form a crystalline propylene polymer or copolymer; and(II) a second stage of polymerizing propylene and ethylene, or propylene, ethylene and another olefin in the presence of the reaction product of the first stage and the same catalyst as used in the first stage to form a rubbery propylene copolymer and a crystalline ethylene polymer or copolymer.Type: GrantFiled: December 10, 1984Date of Patent: October 15, 1985Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akinori Toyota, Norio Kashiwa
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Patent number: 4394465Abstract: The invention provides dental materials in paste form consisting essentially of (a) 18 to 50% by weight of a polymerizable binder, (b) 20 to 65% by weight of a crosslinked bead polymer with an average particle size of 5 to 150 .mu.m and (c) 5 to 45% by weight of glass beads with an average particle size of 5 to 80 .mu.m. The pastes of the invention are outstandingly suitable as a dental filling material.Type: GrantFiled: September 5, 1980Date of Patent: July 19, 1983Assignee: Bayer AktiengesellschaftInventors: Wolfgang Podszun, Michael Walkowiak, Hans-Hermann Schulz
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Patent number: 4247667Abstract: A method of crosslinking poly-.alpha.-olefin series resins, comprising the steps of subjecting a resin composition to graft reaction under a volume ratio of oxygen to the resin composition set at less than 0.1 and at temperatures ranging between the thermal decomposition temperature of the radical generating agent and 230.degree. C., said composition comprising at least one kind of poly-.alpha.-olefin series resin of polypropylene series resin, poly(butene-1) series resin or poly(4-methyl pentene-1) series resin; a radical generating agent of dibenzoyl peroxide or t-butyl perbenzoate; and a silane compound having the general formula of RR'SiY.sub.Type: GrantFiled: February 27, 1979Date of Patent: January 27, 1981Assignee: The Furukawa Electric Co., Ltd.Inventors: Akio Nojiri, Takashi Sawasaki, Toshio Koreeda
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Patent number: 4242251Abstract: A composition comprising a thermoplastic resin and an activated mineral filler, said mineral filler consisting of particles of at least one aluminosilicate-type mineral containing alakali metal ions as cations in its crystal structure, the surfaces of said particles being covered monomolecularly with at least one ethylenically unsaturated organic acid, having 10 or less carbon atoms, which is bonded to the metal ions on the surfaces of said particles and retains ethylenic double bonds unreacted. On being mixed under application of heat to cause reaction, this composition gives a molded article excellent in compatibility and physical properties such as stiffness, toughness, ductility, fatigue properties, water resistance, transparency, etc.Type: GrantFiled: July 26, 1979Date of Patent: December 30, 1980Assignees: Asahi Kasei Kogyo Kabushiki Kaisha, Shiraishi Central Laboratories Co., Ltd.Inventors: Itsuho Aishima, Junji Seki, Koichi Matsumoto, Yonemasa Furusawa, Ryogo Tsukisaka, Yuhachi Takahashi
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Patent number: 4208491Abstract: There is disclosed a method for crosslinking elastomers containing randomly distributed sites of conjugated olefinic unsaturation with monomers adsorbed onto granular adsorbent and dispersed into the elastomer.Type: GrantFiled: October 3, 1975Date of Patent: June 17, 1980Assignee: Exxon Research & Engineering Co.Inventor: Irwin J. Gardner