Imide Patents (Class 525/282)
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Patent number: 5294674Abstract: Novel N-substituted maleimide homopolymers having a number-average molecular weight ranging from 12,000 to about 100,000 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one organometallic polymerization initiator which comprises sec-butyllithium, a sodium alcoholate, diphenylmethylpotassium, naphthalenelithium or naphthalenesodium, and novel N-substituted maleimide homopolymers having a polydispersity index ranging from 1.1 to 1.5 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one alkali metal organometallic polymerization initiator and at least one inorganic or organic salt of an alkali or alkaline earth metal; novel block copolymers include blocks of the above maleimido homopolymers and, e.g., blocks of an acrylic or methacrylic polymer.Type: GrantFiled: December 10, 1991Date of Patent: March 15, 1994Assignee: AtochemInventors: Sunil K. Varshney, Philippe Teyssie, Roger Fayt
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Patent number: 5292815Abstract: A peroxide-vulcanized rubber composition which comprises the vulcanization reaction product of a rubber, an organic peroxide, a biscitraconimido compound and a radical scavenger, is disclosed. The peroxide-vulcanized rubber compositions of the disclosure have significantly improved physical properties. Also disclosed are a peroxide-vulcanization process carried out in the presence of a biscitraconimido compound and a radical scavenger to control the scorch time and the use of a biscitraconimido compound and a radical scavenger to control scorch time in the peroxide-vulcanization of rubber.Type: GrantFiled: October 28, 1992Date of Patent: March 8, 1994Assignee: Akzo N.V.Inventors: Carel T. J. Wreesmann, Auke G. Talma, Willem C. Endstra
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Patent number: 5290874Abstract: The novel alkadiene/vinyl-aromatic copolymers which contain side groups and have a random, block-like or star-like structure and whose polymerized alkadiene comonomer units are partially or completely selectively hydrogenated, and which contain one or more side groups having one or more radicals capable of (4+2) cycloaddition (Diels-Alder reaction) with dienophiles are suitable as such as viscosity index (VI) improvers or can be used for the preparation of dispersant VI improvers. For this purpose, they are reacted with one or more dienophiles which are capable of a Diels-Alder (4+2) cycloaddition reaction and preferably contain strongly polar functional groups.Type: GrantFiled: March 19, 1992Date of Patent: March 1, 1994Assignee: BASF AktiengesellschaftInventors: Dietmar Bender, Klaus Bronstert, Helmut Mach
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Patent number: 5284913Abstract: A methacrylimide-containing polymer comprising a polymer (A) comprised of 5-100 weight % of units represented by the formula (I): ##STR1## wherein R is H or a C1-20 hydrocarbon group, and 0-95 weight % of units derived from an ethylenic monomer, wherein a polymer derived from at least one ethylenic monomer has been grafted onto the polymer (A). The methacrylimide-containing polymer is used as a blend with another thermoplastic polymer.Type: GrantFiled: January 21, 1992Date of Patent: February 8, 1994Assignee: Mitsubishi Rayon Company Ltd.Inventors: Isao Sasaki, Kozi Nishida, Masaharu Fujimoto
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Patent number: 5278242Abstract: The present invention relates to a sulfur vulcanized rubber composition containing 0.1 to 10.0 phr of an oligomeric maleimide of the formula: ##STR1## or a maleamic acid of the formula: ##STR2## wherein R and R.sup.1 are individually selected from the group of radicals consisting of hydrogen, an alkyl having 1 to 4 carbon atoms or a halogen; R.sup.2 is selected from the group of radicals consisting of 1 to 12 carbon atoms; X has a value of from 1 to 146 and n has a value of from 0 to 4.The presence of the maleimide oligomer or maleamic acid improve cord adhesion to the sulfur vulcanized rubber compound.Type: GrantFiled: October 10, 1991Date of Patent: January 11, 1994Inventors: Joel Muse, Paul H. Sandstrom, Lawson G. Wideman
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Patent number: 5278246Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: February 20, 1992Date of Patent: January 11, 1994Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 5264472Abstract: The present invention relates to a process for the preparation of N-(hydroxyphenyl)maleamic acid and various dimers and oligomers thereof. The process is characterized by heating, in the absence of any solvent, N-(hydroxyphenyl)maleamic acid at a temperature ranging from about 150.degree. to about 250.degree. C. in the presence of an acid catalyst. This unique process avoids the need to recover expensive highly polar solvents. The present invention also relates to use of these maleimide containing compounds in rubber. The use of the blend of hydroxyphenyl maleimide and the various dimers and low molecular weight oligomers impart superior properties to rubber when compared to the use of hydroxyphenyl maleimide alone in rubber.Type: GrantFiled: August 21, 1992Date of Patent: November 23, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: Lawson G. Wideman, Gordon R. Schorr, George F. Balogh, Denise J. Keith
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Patent number: 5262488Abstract: This invention relates to the discovery that bis-(2,5-polythio-1,3,4-thiadiazole) in combination with a bismaleimide compound and a sulfenamide compound provides for excellent vulcanization of rubbers and results in an improved final rubber vulcanizate possessing superior physical properties and reversion resistance.Type: GrantFiled: August 26, 1992Date of Patent: November 16, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: Neil A. Maly, Richard M. D'Sidocky, Lewis T. Lukich
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Patent number: 5258466Abstract: Emulsion polymers which are prepared by free-radical polymerisation of monomers in the presence ofa) polymers of the formulae ##STR1## wherein the radicals have the meanings given in the description, and b) low-molecular anionic emulsifiers,are outstandingly suitable as surface sizes for paper. They are distinguished by a low tendency to foaming and by a wide application spectrum.Type: GrantFiled: June 12, 1991Date of Patent: November 2, 1993Assignee: Bayer AktiengesellschaftInventors: Gunter Sackmann, Joachim Konig, Fritz Puchner, Heinz Baumgen
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Patent number: 5247020Abstract: Disclosed is a process for producing a styrene polymer composition, which comprises polymerizing styrene monomer using a catalyst comprising (A) aluminoxane and (B) a compound of the group IV B transition metal in the periodic table, in the presence of rubber-like elastomer.The resin composition obtained thereby is superior in heat resistance, and impact strength, and utilized as the starting material for various moldings.Type: GrantFiled: December 28, 1990Date of Patent: September 21, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Akikazu Nakano, Hideo Teshima, Masahiko Kuramoto
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Patent number: 5231140Abstract: The invention relates to a process for the preparation of (meth)acrylate polymers with side-chain, non-linear optical chromophores and molecular weights of from 5000 to 5000000, which comprises reacting polymers of (meth)acryloyl chloride in solution with D-.omega.-hydroxyalkyl chromophores of the formula (I) or the alcoholates thereof ##STR1## where D is an electron donor,A is an electron acceptor,X is CH and/or N, and m is from 2 to 11.The polymers can be used in optical components.Type: GrantFiled: May 22, 1992Date of Patent: July 27, 1993Assignee: BASF AktiengesellschaftInventors: Heike Kilburg, Karl-Heinz Etzbach, Karin H. Beck, Peter Strohriegl, Harry Mueller, Oskar Nuyken
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Patent number: 5218048Abstract: A resin composition comprising (A) a thermoplastic resin, (B) a functional compound having one or more bonds or one or more functional groups selected from the group consisting of organic groups having a non-aromatic carbon-carbon multiple bonds, oxirane groups and substituted carboxyl groups and (C) a diamino compound represented by the following general formula:R.sup.I NH--X--NHR.sup.IIwherein R.sup.I and R.sup.II each represents a hydrogen atom or an alkyl group optionally having one or more inactive substituents, and X represents an alkylene group having 7 to 30 carbon atoms and optionally having one or more inactive substituents.Type: GrantFiled: December 10, 1990Date of Patent: June 8, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Hiroomi Abe, Kenji Nagaoka, Takashi Sanada
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Patent number: 5216076Abstract: A grafted copolymer containing low cis-polybutadiene having a Mooney viscosity of 30 to 40 as a rubber component, and 30% by volume or more of particles of said rubber component becoming non-spherical rubber particles when molded into a molded article, is suitable for use as a low gloss agent which is usable in the fields of internal and external automotive trims, exterior parts of household electric appliances, etc.Type: GrantFiled: October 15, 1991Date of Patent: June 1, 1993Assignee: Hitachi Chemical CompanyInventors: Seizou Mishima, Kiyotaka Mashita, Kazuyoshi Shike, Jun Matsuzawa, Masashi Shitara, Isamu Hattori
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Patent number: 5212244Abstract: The present invention provide a thermosetting resin composition comprising(a) a poly-p-hydroxstyrene derivative represented by the general formula ##STR1## wherein A is a halogen group, R.sub.1 is an alkenyl or alkenoyl group of 2 to 4 carbon atoms, m denotes a number of 1 to 4 and from more than denotes a number of 1 to 100,(b) an epoxy-modified polybutadiene, and(c) an aromatic maleimide compound, and a prepreg and a laminated sheet which use said resin composition.Type: GrantFiled: October 8, 1991Date of Patent: May 18, 1993Assignee: Hitachi, Ltd.Inventors: Katuo Sugawara, Akio Takahashi, Junichi Katagiri, Akira Nagai, Masahiro Ono, Toshikazu Narahara
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Patent number: 5206302Abstract: The rubber-modified styrene-based resin composition, which is a composite of a styrene-based resin as a continuum of the matrix phase and a diene-based rubbery polymer as a dispersed particulate phase in the matrix, is characterized by the parameters including an average particle diameter of the particles of the rubbery polymer in the range from 0.08 to 1.00 .mu.m, peripheral parameter thereof in the range from 0.1 to 2.5 (.mu.m).sup.-1. (% by weight).sup.-1 and relaxation time T.sub.2 thereof in the range from 300 to 2000 .mu. seconds as the determinant factors of the moldability of the resin composition as well as the impact strength and surface gloss of the shaped articles prepared from the composition.Type: GrantFiled: March 21, 1990Date of Patent: April 27, 1993Assignee: Idemitsu Petrochemical Company LimitedInventors: Tuneaki Kohsaka, Kazuo Sato, Yutaka Tsubokura, Takashi Kanezaki
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Patent number: 5200469Abstract: A crosslinked, unsaturated elastomeric polymer of a C.sub.4 to C.sub.7 isomonoolefin and a C.sub.4 to C.sub.14 conjugated multiolefin is produced by curing the corresponding uncrosslinked polymer having a low level of chemically bound halogen with a curing agent which reacts only with the halogen (e.g., zinc oxide) in combination with a bifunctional dienophile (e.g., a bismaleimide). The uncrosslinked elastomeric polymer is particularly suitable for use in the pharmaceutical industry, for example, for container closures. Shaped rubbery products comprising the crosslinked copolymer are also provided.Type: GrantFiled: April 18, 1990Date of Patent: April 6, 1993Assignee: Exxon Chemical Patents Inc.Inventor: Pierre Hous
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Patent number: 5198551Abstract: The present invention provides (1) curable polyamide monomers represented by the formula: R.sup.1 -A.sup.1 -B.sup.1 -A.sup.2 -B.sup.2 -A.sup.3 -R.sup.2 where R.sup.1 and R.sup.2 are radicals selected from the group consisting of maleimide, substituted maleimide, nadimide, substituted nadimide, ethynyl, and (C(R.sup.3).sub.2).sub.2 where R.sup.3 is hydrogen with the proviso that the two carbon atoms of (C(R.sup.3).sub.2).sub.2 are bound on the aromatic ring of A.sup.1 or A.sup.3 to adjacent carbon atoms, A.sup.1 and A.sup.3 are 1,4-phenylene and the same where said group contains one or more substituents selected from the group consisting of halo, e.g., fluoro, chloro, bromo, or iodo, nitro, lower alkyl, e.g., methyl, ethyl, and propyl, lower alkoxy, e.g., methoxy, ethoxy, or propoxy, and fluoroalkyl or fluoroalkoxy, e.g., trifluoromethyl, pentafluoroethyl and the like, A.sup.Type: GrantFiled: June 7, 1991Date of Patent: March 30, 1993Assignee: The United States of America as represented by the United States Department of EnergyInventors: Brian C. Benicewicz, Andrea E. Hoyt
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Patent number: 5196500Abstract: Tetrapolyimide films derived from 3,3',4,4'-benzophenone tetracarboxylic dianhydride, pyromellitic acid dianhydride, p-phenylene diamine and 4,4'-diaminodiphenyl ether, and their preparation, are described. The tetrapolymer films have low water absorption, low coefficients of thermal and hygroscopic expansion, high modulus and are caustic etachable and can be used in flexible printed circuit and tape automated bonding applications.Type: GrantFiled: December 17, 1990Date of Patent: March 23, 1993Assignee: E. I. du Pont de Nemours and CompanyInventors: John A. Kreuz, Richard F. Sutton, Jr., Stuart N. Milligan
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Patent number: 5191023Abstract: The present invention relates to rubber-modified styrene copolymer that exhibits excellent rigidity, impact strength, external appearance and fluidity, while retaining rigidity, impact properties and external appearance, and when prepared by copolymerizing a maleimide monomer, has high heat resistance and therefore is suitable for materials for components of electric equipments, electronic equipments, automobiles and business machines.Type: GrantFiled: July 8, 1991Date of Patent: March 2, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Mune Iwamoto, Norifumi Ito, Tetsuyuki Matsubara, Kazuo Sugazaki, Toshihiko Ando
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Patent number: 5183857Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: November 30, 1989Date of Patent: February 2, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 5183856Abstract: A thermoplastic elastomer comprising 55-90 parts by weight of a crosslinked acrylic rubber having a glass transition temperature of 0.degree. C. or lower and 45-10 parts by weight a copolymer of a methacrylate ester with a maleimide, which has a glass transition temperature of 110.degree. C. or higher. This thermoplastic elastomer may be produced by a first step of polymerizing an acrylic ester in the presence of a polyfunctional monomer with or without a chain transfer agent and a second step of adding a methacrylate ester and a maleimide to the resulting acrylic rubber to carry out copolymerization.Type: GrantFiled: February 22, 1991Date of Patent: February 2, 1993Assignee: Mitsubishi Petrochemical Company LimitedInventors: Sadao Kitagawa, Mitushige Baba
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Patent number: 5180787Abstract: The present invention relates to fire retardant polymer compositions possessing a non-liner structural configuration resulting by the reaction of N-tribromo-phenylmaleimide, with or without comonomer, with a preformed backbone polymer, in which the bromine content is above 1.2% by weight bromine. The polymer is selected from polystyrene, polyolefins, polyamides, rubbers, polyesters, acrylics, polymeric dienes and mixtures or copolymers thereof. The comonomer present with the N-tribromophenyl-maleimide is selected from the group consisting of acrylonitrile, styrene and vinyl chloride. According to the invention the non-linear structural configurations are obtained either by grafting or crosslinking of the N-tribromophenylmaleimide onto the preformed backbone polymer in the presence of free radical producing means. Optionally, synergistic fire retardant additives such as antimony oxide are incorporated in the compositions.Type: GrantFiled: November 26, 1990Date of Patent: January 19, 1993Assignee: Bromine Compounds, Ltd.Inventors: Leonard M. Shorr, Theodor M. Fishler, Shaul Yanay, Michael Rumack
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Patent number: 5171655Abstract: A photohardenable composition comprises a microgel carrying a group of the formula (I) or (II); or a microgel carrying a group of the formula (III) and at least one acidic group, such as --SO.sub.3 H, --CONHSO.sub.2, --OCO--NH'SO.sub.2 --, --CONHCO--, --SO.sub.2 NH--, a phenolic hydroxyl group and/or --COCH.sub.2 COO--: ##STR1## (wherein R.sup.1 and R.sup.2 each represents a hydrogen atom, a halogen atom, or an alkyl or aryl group, provided that R.sup.1 and R.sup.2 may form a ring together with the carbon atoms to which they are bonded; R.sup.3 represents a hydrogen atom or a methyl group; R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom, a halogen atom, or a substituted or unsubstituted C.sub.1 to C.sub.20 alkyl, aryl, alkoxy or aryloxy group; X.sup.1 represents --CO--O--, --CO--NH-- or --O--; andY.sup.1 represents, for instance, a single bond or a methylene group).Type: GrantFiled: August 2, 1990Date of Patent: December 15, 1992Assignee: Fuji Photo Film Co., Ltd.Inventor: Keitaro Aoshima
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Patent number: 5166271Abstract: A heat resistant polyvinyl chloride copolymer or a heat and impact resistant polyvinyl chloride copolymer is prepared by conducting graft copolymerization of N-substituted maleimide on a vinyl chloride resin or a rubber containing vinyl chloride resin.The graft copolymerization reaction is carried out in the presence of a radical polymerizable monomer which is (1) liquid at the polymerization temperature, (2) capable of dissolving the N-substituted maleimide at the temperature, (3) 70.degree. C. or more in glass transition temperature of the polymer thereof, and (4) used in an amount sufficient to dissolve the N-substituted maleimide.Type: GrantFiled: September 1, 1989Date of Patent: November 24, 1992Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Seiichi Masuko, Hideaki Takahara, Akira Yamamoto
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Patent number: 5164451Abstract: The maleimide copolymer of the invention is of the class of N-substituted maleimide copolymer such as N-alkyl or N-aromatic maleimide copolymer having peroxy bonds in a molecule, utilizable as a precursor for preparing a maleimide block copolymer and as a modifier for other resins. The maleimide block copolymer, which is useful as a molding material or a thermal resistance improver, is obtained by polymerizing maleimide monomers in the presence of a polymeric peroxide followed by polymerizing vinyl monomers.Type: GrantFiled: June 2, 1992Date of Patent: November 17, 1992Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Kenji Kato, Kazunori Doiuchi, Yasumi Koinuma, Yukinori Haruta, Kazuyoshi Aoshima
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Patent number: 5164212Abstract: A method for permanently coloring fruits (cherries) and vegetables using carmine and other anthraquinones, using mixtures of multivalent metal ions and acid. The cherries are infused with a mixture of calcium ions, other multivalent metal ions, and carmine dye, at a pH at which the carmine is in soluble form. The cherries are then infused with an acidification solution which results in the preciptation of an insoluble carmine-metal ion complex within the cherries. Unused dye is treated and recycled.Type: GrantFiled: August 23, 1991Date of Patent: November 17, 1992Assignee: Del Monte CorporationInventors: Karim Nafisi-Novaghar, Dorothy K. Keefer, Jurgen H. Strasser, Lowell V. Dravenstadt, Russell A. Lem
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Patent number: 5159025Abstract: A styrene-based copolymer comprising 74.3 to 98.7 mol % of the structural unit (I) represented by the general formula: ##STR1## 1.3 to 25.4 mol % of the structural unit (II) represented by the formula: ##STR2## and 10 to 7000 mol ppm of the structural unit (III) represented by the general formula: ##STR3## (wherein R.sup.1 to R.sup.3 are as defined in the appended claims), characterized by having toluene-insoluble content of not more than 0.5% by weight, is disclosed.Efficient processes for producing the above styrene-based copolymer are also disclosed.Type: GrantFiled: June 12, 1989Date of Patent: October 27, 1992Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Eiichi Terada
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Patent number: 5157083Abstract: A rubber composition comprising a polymer obtained by adding maleic anhydride or a derivative thereof to a nitrile-group-containing highly saturated polymer rubber having an iodine value of 80 or less, which can be widely utilized in belts, hoses such as for hydraulic ones.Type: GrantFiled: February 15, 1989Date of Patent: October 20, 1992Assignee: Nippon Zeon Co LtdInventors: Mitsuyoshi Aonuma, Hiroshi Sakakida, Yoshiaki Aimura
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Patent number: 5145943Abstract: Fusible polyimide powders are prepared by the process of this invention. An amic acid amine is first prepared by treating (n+1) moles of a bis(aminophenyl)methane with n mole of aromatic tetracarboxylic anhdride to produce an aromatic amic acid prepolymer. This prepolymer is then mixed with an unsaturated carbocyclic monoanhydride and the mixture heated to form a reactive end-capped polyamic acid precursor. The resulting composition is thermally treated in order to partially imidize the precursor. The resulting fusible polyimide powder is finally separated.Type: GrantFiled: December 17, 1990Date of Patent: September 8, 1992Assignee: Ethyl CorporationInventors: Hsueh M. Li, John Y. Lee
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Patent number: 5143960Abstract: A composition comprising (i) a copolymer of ethylene; one or more polar unsaturated alcohols, acids, or esters; and a N-substituted maleimide or (ii) a copolymer of ethylene and one or more polar unsaturated alcohols, acids, or esters grafted with an N-substituted maleimide.Type: GrantFiled: September 12, 1989Date of Patent: September 1, 1992Assignee: Nippon Unicar Company LimitedInventors: Akitaka Senuma, Toshiyuki Nagai, Kiroku Tsukada, Akio Hayashi
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Patent number: 5140074Abstract: Disclosed is a method of making graft copolymers of olefin polymers by contacting a particulate olefin polymer with a free radical polymeriztion initiator, e.g., a peroxide, and a vinyl monomer at about from 60.degree. to 125.degree. C., while controlling the monomer addition rate so that it does not exceed about 4.5 pph/min, and most preferably does not exceed about 3.0 pph/min, at any monomer feed level. To prevent polymer degradation, a non-oxidizing environment is maintained throughout the process, and residual free radicals are deactivated, and unreacted initiator is decomposed, before the graft copolymer is exposed to air.Type: GrantFiled: December 10, 1990Date of Patent: August 18, 1992Assignee: Himont IncorporatedInventors: Anthony J. DeNicola, Jr., Suhas Guhaniyogi
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Patent number: 5137977Abstract: A polymer composition comprising a polymer or a highly saturated polymer, an organic peroxide and a maleimide derivative, said polymer being produced by radical polymerization using a sulfur-free compound as an emulsifier and a terpene type compound as a molecular weight modifier and said highly saturated polymer being obtained by hydrogenating said polymer.Type: GrantFiled: December 27, 1990Date of Patent: August 11, 1992Assignee: Nippon Zeon Co., Ltd.Inventors: Sunao Saitoh, Noboru Watanabe
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Patent number: 5132370Abstract: An improved method for carboxylating styrenic resins and particularly impact-modified styrenic resins such as ABS resins, by melt-processing a mixture comprising the styrenic resin, an ethylenically-unsaturated carboxylic compound, and, optionally, a free-radical generator.Type: GrantFiled: October 22, 1991Date of Patent: July 21, 1992Assignee: Borg-Warner Chemicals, Inc.Inventors: Thomas S. Grant, David V. Howe
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Patent number: 5132371Abstract: A methacrylimide-containing polymer comprising a polymer (A) comprised of 5-100 weight % of units represented by the formula (I): ##STR1## wherein R is H or C1-20 hydrocarbon group, and 0-95 weight % of units derived from an ethylenic monomer, wherein a polymer derived from at least one ethylenic monomer has been grafted onto the polymer (A). The methacrylimide-containing polymer is used as a blend with another thermoplastic polymer.Type: GrantFiled: December 11, 1989Date of Patent: July 21, 1992Assignee: Mitsubishi Rayon Company Ltd.Inventors: Isao Sasaki, Kozi Nishida, Masaharu Fujimoto
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Patent number: 5098627Abstract: The present invention relates to a paper releasing guide-claw for a copying machine and a method for producing the same including molding a material containing from about 50-90% by weight of a polyimide consisting essentially of recurring units of the formula: ##STR1## from about 5 to about 40% by weight of a fibrous reinforcing material, and from about 5 to about 30% by weight of a solid lubricant, wherein the sum of the content of the fibrous reinforcing material and the solid lubricant is from about 10 to about 50% by weight, heat treating the molded guide-claw at a temperature of from about 250.degree. C. to about 340.degree. C. for a time sufficient to increase the density of the polyimide component by 1.5%.Type: GrantFiled: August 30, 1990Date of Patent: March 24, 1992Assignees: NTN-Rulon Industries Company Ltd., Mitsui Toatsu Chemicals, Inc.Inventors: Masao Yoshikawa, Taizo Nagahiro
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Patent number: 5091470Abstract: Thermoplastic rubber modified molding compositions containing N-phenyl maleimide, acrylonitrile, and at least one copolymerizable comonomer suitable for preparing moldings having low surface gloss.Type: GrantFiled: September 10, 1990Date of Patent: February 25, 1992Assignee: The Dow Chemical CompanyInventors: Hendrick W. Wolsink, John J. Plomer, Thomas D. Traugott
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Patent number: 5087681Abstract: A novel method for preparing a thermosetting imide resin composition which consists of chemically reacting a liquid mixture of a carboxy-(CTBN) or vinylidene-(VTBN) polybutadiene/acrylonitrile and a co-reactant comprisinga. at least one N,N'-bisimide of an unsaturated carboxylic acid of general formula I ##STR1## wherein B represents a divalent radical containing a carbon-carbon double bond and A represents a divalent radical having at least two carbon atoms, orb. the imide resin reaction product of an least one N,N'-bisimide of general formula I and at least one primary organic diamine or organic hydrazide, orc. the imide resin reaction product of at least one N,N'-bisimide of general formula I, at least one monoimide, and at least one organic hydrazide,to yield a thermosetting imide resin composition containing copolymerized CTBN or VTBN and co-reactant. A resin composition prepared by this method may be cured at a temperature between 100.degree. C. and 350.degree. C.Type: GrantFiled: August 8, 1989Date of Patent: February 11, 1992Assignee: Secretary of State for Defence in her Majesty's Government of United KingdomInventors: Anthony J. Kinloch, Stephen J. Shaw
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Patent number: 5081193Abstract: A grafted copolymer containing low cis-polybutadiene having a Mooney viscosity of 30 to 40 as a rubber component, and 30% by volume or more of particles of said rubber component becoming non-spherical rubber particles when molded into a molded article, is suitable for use as a low gloss agent which is usable in the fields of internal and external automotive trims, exterior parts of household electric applicances, etc.Type: GrantFiled: January 22, 1990Date of Patent: January 14, 1992Assignee: Hitachi Chemical Company Ltd.Inventors: Seizou Mishima, Kiyotaka Mashita, Kazuyoshi Shike, Jun Matsuzawa, Masashi Shitara, Isamu Hattori
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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: 4968753Abstract: A rubber composition capable of giving a vulcanizate having improved ozone resistance. The composition comprises a nitrile group-containing highly saturated polymer rubber having an iodine value of not more than 80, an organic peroxide, a crosslinking coagent and a quinoline-type stabilizer.Type: GrantFiled: July 13, 1988Date of Patent: November 6, 1990Assignee: Nippon Zeon Co., Ltd.Inventors: Motofumi Oyama, Tetsu Ohishi
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Patent number: 4966947Abstract: Chemically-modified, chlorinated, hydroxyimidized polyolefins having improved properties of solvent and/or humidity resistance and method for preparation thereof are disclosed. The novel materials prepared in accordance with the present invention are useful, for example, as primers for use with polymeric substrates.Type: GrantFiled: May 20, 1988Date of Patent: October 30, 1990Assignee: Eastman Kodak CompanyInventors: Slaton E. Fry, David W. Magouyrk, Allen J. Blankenship, Paul J. Greene, Larry K. Johnson
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Patent number: 4962149Abstract: Chemically-modified, chlorinated, hydroxyimidized polyolefins are used as stir-in additives to produce a paint having improved film appearance, adhesion and campatibility.Type: GrantFiled: November 7, 1989Date of Patent: October 9, 1990Assignee: Eastman Kodak CompanyInventors: Slaton E. Fry, David W. Magouyrk, Allen J. Blankenship, Paul J. Greene
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Patent number: 4959418Abstract: Polymer powders and thermoplastic moulding materials with improved properties are obtained if graft polymers and/or resins in particle form are used and small amounts of rubber-like polymers are polymerized or graft-polymerized onto their particle surfaces.Type: GrantFiled: August 18, 1986Date of Patent: September 25, 1990Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Karl-Heinz Ott, Dieter Wittmann, Hans-Eberhard Braese
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Patent number: 4959420Abstract: A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer having a chlorine content of from about 0.5 to 14 percent by weight characterized by superior viscosity stability on storage or exposure to elevated temperatures is obtained by chlorinating an ethylene-alpha olefin-nonconjugated diolefin terpolymer wherein said nonconjugated diolefin is an acyclic nonconjugated diolefin characterized in that one olefinic bond is monosubstituted and terminal and the other olefinic bond is trisubstituted. A vulcanizable rubber composition comprising said chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer and cure active agents is also provided.Type: GrantFiled: November 1, 1989Date of Patent: September 25, 1990Assignee: Polysar LimitedInventors: Stephen C. Davis, Janet B. Fulton, Peter P. M. Hoang
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Patent number: 4957973Abstract: "Living" polymers and their preparation in the absence of a co-catalyst at a pressure greater than about 50 MPa, from polar acrylic or maleimide monomers and organosilicon, -tin or -germanium initiators.Type: GrantFiled: September 22, 1987Date of Patent: September 18, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Dotsevi Y. Sogah
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Patent number: 4954195Abstract: A process for increasing the damage tolerance in thermoset composites without loss of processibility or mechanical properties of the thermoset, by controlled solubility of a thermoplastic filler in the base thermoset. The process includes mixing spherical particles of a selected thermoplastic, such as polyimide, of particle size ranging from about 10 to 80 microns, with a hot thermoset resin, such as a bismaleimide, to form a uniform dispersion of the resin mixture, employing about 5 to about 40% of the thermoplastic by weight of the mixture of the two resins. The particles of thermoplastic are non-agglomerating and insoluble in the resin mixture. The hot resin dispersion is then applied to fiber reinforcement, such as carbon fiber tapes, to form pre-pregs. Upon curing the thermoset at elevated temperature, the thermoplastic particles dissolve in the thermoset resin, forming a composite with no definable boundary interfaces between the thermoplastic and thermosetting resins.Type: GrantFiled: February 13, 1989Date of Patent: September 4, 1990Assignee: Lockheed CorporationInventor: Russell L. Turpin
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Patent number: 4931507Abstract: The present invention provides a thermosetting resin composition comprising(a) a prepolymer of a poly(p-hydroxystyrene) derivative represented by the general formula ##STR1## wherein A is a halogen group, R.sub.1 is an alkenyl or alkenoyl group of 2 to 4 carbon atoms, m denotes a number of 1 to 4 and n denotes a number of 1 to 100,(b) an epoxy-modified polybutadiene, and(c) an aromatic maleimide compound, and a prepreg and a laminated sheet which use said resin composition.Type: GrantFiled: November 2, 1988Date of Patent: June 5, 1990Assignee: Hitachi, Ltd.Inventors: Katuo Sugawara, Akio Takahashi, Junichi Katagiri, Akira Nagai, Masahiro Ono, Toshikazu Narahara
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Patent number: 4927889Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, abrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: October 27, 1987Date of Patent: May 22, 1990Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 4912162Abstract: Disclosed is a graft copolymer resin prepared by graft polymerizing a vinyl compound onto a composite-structured acrylic rubber whose particles are composed of a core consisting of a diene rubber enlarged by treatment with an acid group-containing copolymer latex, and an outer layer consisting of an acrylate polymer having a crosslinked structure formed by the combined use of a graft-linking agent and a cross-linking agent. This graft copolymer resin may be blended with a rigid thermoplastic resin in a specific proportion. This resin composition imparts a good gloss to the molded articles formed therefrom, while retaining excellent impact resistance and weather resistance.Type: GrantFiled: February 3, 1987Date of Patent: March 27, 1990Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kazuo Kishida, Yutaka Toyooka, Haruyoshi Kitahara
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Patent number: 4876313Abstract: Improved core-shell polymers having an alkali-insoluble core and an alkali-soluble shell are prepared by emulsion polymerization of the core-shell polymers utilizing compounds which chemically graft the core and shell together. The core-shell polymers exhibit improved solvent stability, water resistance, heat resistance and rheology. The polymers are useful in application such as inks, coatings and varnishes, floor polishes, leather treatment, cement formulations, and as a seed for further emulsion polymerization.Type: GrantFiled: August 29, 1986Date of Patent: October 24, 1989Assignee: Rohm and Haas CompanyInventor: Dennis P. Lorah