With Sulfur-free Organic Compound Patents (Class 525/346)
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Patent number: 5496900Abstract: Elastomeric copolymer obtained by the polymerization of:a) a monomer selected from those having general formula CH.sub.2 .dbd.CR'--CO--OR, wherein R is a monofunctional radical selected from linear or branched C1-C6 alkyl radicals;b) (meth)acrylonitrile;c) a third monomer selected from:c1) a chlorinated vinyl ester;c2) a mixture of an unsaturated carboxylic acid and an aliphatic or aromatic diepoxy compound;c3) a mixture consisting of a chlorinated vinyl ester and an unsaturated carboxylic acid.Type: GrantFiled: March 30, 1995Date of Patent: March 5, 1996Assignee: Enichem Elastomeri S.r.l.Inventors: Joseph Da Lio, Laura Lanzavecchia, Giuseppe Savini
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Patent number: 5439980Abstract: A polymer comprising at least one polymer chain is produced by polymerizing, in the presence of a radical generating source and an iodide compound, at least one monomer M.sub.1 having a radically polymerizable unsaturated bond between a carbon atom and an iodine atom constituting a carbon-iodine bond of the iodide compound to form at least one polymer chain between the carbon atom and the iodine atom, wherein the polymerization reaction is carried out in the presence of a monomer M.sub.2 which is different from the monomer M.sub.1 and has a larger addition reactivity with a carbon radical which is generated by cleavage of the carbon-iodine bond of the iodine compound than that of the monomer M.sub.1.Type: GrantFiled: December 20, 1993Date of Patent: August 8, 1995Assignee: Daikin IndustriesInventors: Yuji Yutani, Masayoshi Tatemoto
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Patent number: 5416167Abstract: Vulcanizable rubber compositions are disclosed which contain partial polycarboxylic acid esters or their salts. Vulcanizates obtained from the compositions are readily processible and are found to have reduced compression set and high tension values, in particular after ageing by heat.Type: GrantFiled: May 3, 1994Date of Patent: May 16, 1995Assignee: Bayer AktiengesellschaftInventors: Joachim Thormer, Thomas Scholl, Hans-Wilhelm Engels
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Patent number: 5391621Abstract: The present invention provides an improved curing system for chlorinated polymers and blends thereof with more highly unsaturated eleastomers, using an organopolysulfide derivative of 2,5-dimercapto-l,3,4-thiadiazole as a curing agent.Type: GrantFiled: October 15, 1993Date of Patent: February 21, 1995Assignee: R. T. Vanderbilt Company, Inc.Inventors: Robert F. Ohm, David M. Hoffman, Ralph A. Annicelli
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Patent number: 5385980Abstract: A curable halobutyl rubber/polyepihalohydrin rubber blend comprises a cure system consisting essentially of (a) sulfur, (b) sulfur accelerator, (c) zinc-containing promoter, (d) urea or urea derivative vulcanization accelerator and, optionally, (e) di- or tri-mercapto nonsulfur curative such as 2,4,6-trimercapto-1,3,5-triazine. The halobutyl rubber/polyepi-halohydrin rubber blends that are crosslinked with the cure system of this invention exhibit excellent scorch safety and cure rate, as well as a high degree of crosslinking, and are useful in the manufacture of tire inner tubes and inner liners.Type: GrantFiled: March 22, 1994Date of Patent: January 31, 1995Assignee: Zeon Chemicals U.S.A., Inc.Inventors: Ronald J. Schaefer, Vernon L. Kyllingstad
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Patent number: 5328953Abstract: Alkyloxyalkanoic acids, salts or esters having the formulaR.sup.1 --O--(CR.sup.3 R.sup.4).sub.x CO.sub.2 R.sup.2where R.sup.1 represents an alkyl or alkenyl group, or a hydroxy- or alkoxy- substituted alkyl or alkenyl group, said group containing (apart from the alkoxy carbon atoms in an alkoxy-substituted alkyl or alkenyl group) from 1 to 22 carbon atoms, R.sup.2 represents hydrogen, a metallic or other cationic group, each of R.sup.3 and R.sup.4 represents independently hydrogen or an alkyl group, and x has a value of from 1 to 10, act as agents useful for modifying rubber properties. Compared with conventional processing aids, they improve the processing characteristics of unvulcanised rubber compositions and can have beneficial effect on the physical properties of vulcanisates obtained by the vulcanisation of such compositions.Type: GrantFiled: September 11, 1992Date of Patent: July 12, 1994Assignee: Monsanto Europe S.A./N.V.Inventor: Eric R. Lynch
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Patent number: 5326828Abstract: The current invention relates to the use of tetrabenzylthiuram disulfide/urea curative package for thermosetting rubber elastomers in an environmentally sound method of eliminating undesirable nitrosamines. The unique curative package synergistically increases the cure rate and physical properties of the elastomeric compound while reducing the amount of accelerator needed for vulcanization.Type: GrantFiled: October 9, 1992Date of Patent: July 5, 1994Assignee: Uniroyal Chemical Company, Inc.Inventors: Donald G. Rowland, David T. Faiman, Thomas L. Jablonowski
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Patent number: 5272215Abstract: A thermoplastic elastomeric block copolymer comprising olefin elastomeric mid block units and terminal polystyrene units having substitution in an amount sufficient to raise the glass transition temperature of the polymer. The substitution comprises cycloaliphatic or aromatic acylation and the acylation substitution is accomplished by reaction of an acylhalide with the copolymer in the presence of a catalytic amount of triflic acid.Type: GrantFiled: January 10, 1991Date of Patent: December 21, 1993Assignee: The West Company, IncorporatedInventors: H. James Harwood, Allan S. Jones, Malcolm A. Smook
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Patent number: 5260424Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.Type: GrantFiled: February 3, 1992Date of Patent: November 9, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Gordon M. Cohen, Hans J. Reich
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Patent number: 5248736Abstract: There are provided a process for producing a diene polymer having markedly improved tensil strength and wear resistance and further having improved heat build-up, refound resilience, processability and wet skid resistance, as well as a rubber composition containing said diene polymer and having improved tensil strength, wear resistance, etc. Said diene polymer is produced by polymerizing a conjugated diene monomer or a mixture of the conjugated diene monomer and an aromatic vinyl monomer in a hydrocarbon solvent using a composite initiator containing an alkaline earth metal, and reacting active ends of the obtained active diene polymer with (a) a compound represented by the formula M.dbd.C.dbd.M (wherein M denotes an oxygen atom or a sulfur atom) or (b) N-substituted aminoketone, N-substituted thioaminoketone, N-substituted aminoaldehyde, N-substituted thioaminoaldehyde or a compound having an atomic group in a molecule represented by the formula --C(.dbd.M)--N< in a molecule.Type: GrantFiled: March 13, 1992Date of Patent: September 28, 1993Assignee: Nippon Zeon Co., Ltd.Inventors: Fumitoshi Suzuki, Yoshihiro Chino
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Patent number: 5239007Abstract: Oil-absorbent compositions are disclosed. The compositions are crosslinked interpolymers of an alkylated styrene and a rubber. The compositions of the invention have high absorption capacities and absorption rates compared with prior-art compositions.Type: GrantFiled: October 22, 1991Date of Patent: August 24, 1993Assignee: ARCO Chemical Technology, L.P.Inventor: Bi Le-Khac
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Patent number: 5239015Abstract: The present invention pertains to a process for the preparation of polymers comprising poly(4-hydroxystyrene) or substituted poly(4-hydroxystyrene) or both. The polymers have low optical density (absorbance) over a wavelength range from about 240 to about 260 nm, as well as low optical density over the near UV and visible spectrum (310 to 800 nm). Such polymers are produced by polymerizing 4-acetoxystyrene and/or substituted 4-acetoxystyrene monomers, with or without other comonomers, and subsequently performing transesterification. In the most preferred embodiment of the present invention, the polymers are produced using at least one alcohol as a reaction medium, a chain transfer agent and a transesterification reactant, providing an unusually economic process. These polymers are particularly useful as photoresist components for use in combination with deep UV, X-ray, and E-Beam imaging systems.Type: GrantFiled: May 28, 1991Date of Patent: August 24, 1993Assignee: Hoechst Celanese CorporationInventors: Michael T. Sheehan, James H. Rea
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Patent number: 5187239Abstract: A method is disclosed for increasing the rate of vulcanization of a rubber composition comprising adding to a sulfur vulcanizable rubber a methyl trialkyl ammonium salt of the formula: ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 are independently alkyl radicals having 8 to 10 carbon atoms and M is selected from the group consisting of Cl, Br, CH.sub.3 SO.sub.4 and HSO.sub.4. Addition of a methyl trialkyl ammonium salt of the above formula significantly increases the rate of vulcanization of the rubber.Type: GrantFiled: March 22, 1990Date of Patent: February 16, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: Carl R. Parks, Richard M. D'Sidocky, Martin P. Cohen
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Patent number: 5171789Abstract: The present invention relates to poly(oxydiphenylamines) of the formula: ##STR1## wherein n is an integer ranging from about 1 to 100. The poly(oxydiphenylamines) are useful as a rubber additive and have shown improvement in the tear strength of the rubber as measured by increased peel adhesion.Type: GrantFiled: November 21, 1991Date of Patent: December 15, 1992Assignee: The Goodyear Tire & Rubber CompanyInventors: Lawson G. Wideman, George F. Balogh, Denise J. Keith
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Patent number: 5149742Abstract: Heat curable adhesives, based on polybutadiene containing hydroxyl groups, which have a content of (a) polybutadiene having a number average molecular weight of from about 1000 to 3500 and OH values in the range from about 20 to 100; (b) blocked multi-isocyanates, (c) sulfur and (d) conventional vulcanization accelerators, an which may also contain conventional, especially mineral, fillers, pigments and/or auxiliaries, show good elasticity behavior and high tensile shear strength after curing and have a relatively low viscosity favorable for processing before curing.Type: GrantFiled: December 1, 1988Date of Patent: September 22, 1992Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Richard Hemel, Julius Herold, Hans-Juergen Buecken, Peter Hofmann
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Patent number: 5110869Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.Type: GrantFiled: August 21, 1990Date of Patent: May 5, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Gordon M. Cohen, Hans J. Reich
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Patent number: 5096978Abstract: Synthetic rubber compositions are disclosed which have improved properties of scorch delay and cure rate. Substituted urea coactivators are generally used in addition to a conventional accelerator.Type: GrantFiled: October 3, 1988Date of Patent: March 17, 1992Assignee: Monsanto CompanyInventor: Aubert Y. Coran
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Patent number: 5066775Abstract: The invention relates to new sulphur-containing copolymers, a process for their preparation from a sulphur source and a mixture of dihalogenoaromatics and dihalogenoaliphatics and their use for the production of shaped articles.Type: GrantFiled: February 5, 1990Date of Patent: November 19, 1991Assignee: Bayer AktiengesellschaftInventors: Ernst-Ulrich Dorf, Klaus Reinking, Wolfgang Jakob, Erhard Tresper, Wolfgang Russeler
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Patent number: 5061761Abstract: Provided are polyvinyl ester macromonomers (A) having excellent polymerizability and highly controlled composition, structure and distribution of polymerization degree.Also provided are polyvinyl alcohol macromonomers (B) obtained by solvolysis of the above polyvinyl ester macromonomers (A) and having excellent polymerizability and highly controlled composition, structure and distribution of polymerization degree.Further provided are polymers (C) obtained by polymerization of the above polyvinyl ester macromonomers (A) and containing units from polyvinyl ester macromonomers having highly controlled composition, structure and distribution of polymerization degree. These polymers (C) are useful as compatibility improving agents, surface improving agents and like agents.Type: GrantFiled: September 27, 1990Date of Patent: October 29, 1991Assignee: Kuraray Co., Ltd.Inventors: Toshiaki Sato, Takashi Ohnaga, Kaoru Ikeda
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Patent number: 5002829Abstract: A rubber composition containing (a) a rubber material, (b) carbon black, (c) a vulcanizing agent, and (d) an amine compound represented by the following structural formula: ##STR1## the rubber composition containing 0.5 to 4 parts by weight of the amine compound per 100 parts by weight of the rubber material. The rubber composition is vulcanized to produce a rubber formed article such as a rubber vibration isolator.Type: GrantFiled: July 26, 1990Date of Patent: March 26, 1991Assignee: Tokai Rubber Industries, Ltd.Inventor: Akihiro Shibahara
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Patent number: 4987196Abstract: A process is disclosed for acceleratively vulcanizing rubber. Starting rubber, natural or synthetic, is combined with specified amounts of a selected accelerator whereby vulcanization characteristics can be greatly improved. Such accelerator has its source of supply from serums by-produced upon treatment of natural rubber latexes.Type: GrantFiled: December 20, 1989Date of Patent: January 22, 1991Assignee: The Yokohama Rubber Co., Ltd.Inventor: Yoshio Tajima
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Patent number: 4898916Abstract: Polymers of 4-vinylphenol are made by the acid catalyzed transesterification of polymers of 4-acetoxystyrene in an alcohol. The 4-vinylphenol polymers are useful as epoxy resins curing agents and as the phenolic base for epoxy resin per se.Type: GrantFiled: August 8, 1988Date of Patent: February 6, 1990Assignee: Hoechst Celanese CorporationInventor: Balaram B. G. Gupta
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Patent number: 4895911Abstract: There is disclosed a method for enhancing the cure of a sulfur vulcanizable elastomer which comprises adding to the vulcanizable elastomer a mixture of tall oil fatty acids comprising at least (a) from about 28% to about 55% by weight of oleic acid, (b) from about 25% to about 40% by weight of linoleic acid, (c) from about 4% to about 20% conjugated linoleic acid and (d) from about 0% to about 8% rosin acids. Use of a mixture of tall oil acids as a cure activator significantly lowers the cost of producing the vulcanizate while concomitantly improving the adhesion and dynamic properties of the elastomer.Type: GrantFiled: August 18, 1989Date of Patent: January 23, 1990Assignee: The Goodyear Tire & Rubber CompanyInventors: Syed K. Mowdood, Bharat K. Kansupada
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Patent number: 4882394Abstract: The cure or vulcanization rate of a rubber compound can be increased without adverse effects on the properties of the resulting cured rubber or rubber vulcanizate by replacing stearic acid or other acid in the rubber activator system with an amide like stearamide for activation of the sulfenamide acceleration of the vulcanization of rubber.Type: GrantFiled: September 8, 1987Date of Patent: November 21, 1989Assignee: General Tire, Inc.Inventor: James G. Kreiner
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Patent number: 4877845Abstract: There is disclosed compounds of the structural formula: ##STR1## wherein X is a radical of the structural formula:--CH.sub.2 --CH.sub.2 --NH--CH.sub.2 --CH.sub.2 --yand y is 0,1,2 or 3; which when combined with a nonhalogenated vulcanizable diene containing elastomer such as polybutadiene, polyisoprene, styrene/butadiene copolymers, terpolymers of acrylonitrile butadiene and styrene and blends thereof accelerate the rate of vulcanization without detrimentally impacting the processing safety of the rubber. These compounds either in free form structural formula (I) or as preformed complexes with zinc structural formula (II) in the plus 2 valence state offer significantly enhanced rates of cure and excellent final physical properties without a significant loss of processing safety. The preformed nonhalogenated zinc complexes (II) may be added to sulfur vulcanizable rubbers at levels that maintain typical levels of zinc in the rubber compound.Type: GrantFiled: January 13, 1989Date of Patent: October 31, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Carl R. Parks, Donald J. Burlett
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Patent number: 4876315Abstract: A composition of matter is disclosed comprising a saturated elastomer having an active halogen-containing cure site, sulfur and a quaternary ammonium salt of a mineral acid. The invention also provides a process for vulcanizing the above composition.Type: GrantFiled: June 6, 1988Date of Patent: October 24, 1989Assignee: National Distillers and Chemical CorporationInventors: John M. Hoyt, Steven D. Blazey
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Patent number: 4873290Abstract: There is disclosed an improved method for open steam curing of mineral-loaded elastomers. It has been discovered that use of a vulcanization agent comprising a mixture of an alkyl phenol disulfide and a guanidine compound provides a synergistic curing system that is superior over the use of either component alone. The improved curing system of the present invention is particularly suited for the open steam curing of mineral-loaded chlorobutyl compounds. The cure system may be used in addition to zinc oxide and results in excellent states of cure as determined by tensile elongation and hardness measurements.Type: GrantFiled: August 11, 1988Date of Patent: October 10, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Terry F. Allen, Robert C. Schisler
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Patent number: 4839433Abstract: There is disclosed compounds of the structural formula: ##STR1## wherein X is a radical of the structural formula:--CH.sub.2 --CH.sub.2 --NH--CH.sub.2 --Ch.sub.2 --.sub.yand y is 0,1,2 or 3; which when combined with a nonhalogenated vulcanizable diene containing elastomer such as polybutadiene, polyisoprene, styrene/butadiene copolymers, terpolymers of acrylonitrile butadiene and styrene and blends thereof accelerate the rate of vulcanization without detrimentally impacting the processing safety of the rubber. These compounds either in free form structural formula (I) or as preformed complexes with zinc structural formula (II) in the plus 2 valence state offer significantly enhanced rates of cure and excellent final physical properties without a significant loss of processing safety. The preformed nonhalogeneated zinc complexes (II) may be added to sulfur vulcanizable rubbers at levels that maintain typical levels of zinc in the rubber compound.Type: GrantFiled: December 7, 1987Date of Patent: June 13, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Carl R. Parks, Donald J. Burlett
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Patent number: 4824914Abstract: It is often desirable to utilize accelerators in the sulfur vulcanization of unsaturated rubbers. In many cases a primary accelerator is used in combination with another accelerator, called a secondary accelerator or activator, which further increases the rate of vulcanization. It has been determined that compounds having the structural formula:NH.sub.2 --A[NH--(CH.sub.2).sub.x NH].sub.n A--NH.sub.2wherein x is 2 or 3, wherein n is an integer from 1 to 100, and wherein A represents an alkylene group containing from 1 to 20 carbon atoms, act as secondary accelerators in the vulcanization of unsaturated rubbers. For example, it has been determined that 4,7-diaza-decane-1,10-diamine is a particularly desirable secondary accelerator.Type: GrantFiled: September 14, 1987Date of Patent: April 25, 1989Assignee: The Goodyear Tire & Rubber CompanyInventor: Paul H. Sandstrom
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Patent number: 4808669Abstract: A composition of matter is disclosed comprising a saturated elastomer having an active halogen-containing cure site, sulfur and a quaternary ammonium salt of a mineral acid. The invention also provides a process for vulcanizing the above composition.Type: GrantFiled: June 6, 1988Date of Patent: February 28, 1989Assignee: National Distillers and Chemical CorporationInventors: John M. Hoyt, Steven D. Blazey
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Patent number: 4806584Abstract: A composition of matter is disclosed comprising (1) a saturated elastomer having an active halogen-containing cure site, (2) a soap/sulfur cure system, and (3) a phase transfer compound. The phase transfer catalyst comprises a quaternary ammonium or phosphonium salt of a mineral acid or an alkylene oxide polymer. The phase transfer compounds accelerate soap/sulfur cures and make it possible to obtain acceptable cure rates with higher fatty acid soaps.Type: GrantFiled: December 5, 1986Date of Patent: February 21, 1989Assignee: National Distillers and Chemical CorporationInventors: John M. Hoyt, Steven D. Blazey
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Patent number: 4745147Abstract: A curable composition comprising chlorinated polyethylene containing 20 to 50 weight percent chlorine, from 0.75 to 3 parts per 100 parts by weight chlorinated polyethylene of a polymercapto compound such as 2,5-dimercapto-1,3,4-thiadiazole, from 0.5 to 20 parts by weight per 100 parts by weight chlorinated polyethylene of an acid acceptor such as magnesium oxide, from 0.25 to 10 parts by weight per 100 parts chlorinated polyethylene of a polyhydric alcohol. Preferably the composition contains an initiator which is an amine, quaternary ammonium compound or a phosphonium compound.Type: GrantFiled: October 24, 1986Date of Patent: May 17, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventor: Wolfgang Honsberg
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Patent number: 4719266Abstract: The use of metal salts in vulcanizable elastomer compounds is described. In sufficient amounts, the metal salts function as both vulcanization accelerators and adhesion promoters for rubber to metal adhesion, thus eliminating the need for a separate ingredient for each purpose. Certain of the salts also promote the adhesion of the elastomer to metal adherends which have heretofore been unknown, for example, to a zinc surface. Curing characteristics of elastomer formulations using the metal salts are comparable to those using prior art accelerators.Type: GrantFiled: July 22, 1986Date of Patent: January 12, 1988Assignee: The Goodyear Tire & Rubber CompanyInventor: David P. Craig
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Patent number: 4714742Abstract: There are disclosed cyanamide derivatives as vulcanization rate modifiers which when added to customary cure packages, accelerate the rate of vulcanization and result in vulcanizates having improved characteristics and age resistance.Type: GrantFiled: October 20, 1986Date of Patent: December 22, 1987Assignee: The Goodyear Tire & Rubber CompanyInventors: Roger J. Hopper, Carl R. Parks
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Patent number: 4663392Abstract: A process for the preparation of oil-soluble Mannich condensation products wherein an amine is prereacted with a sulfonic acid or ammonium sulfonate, oleic acid, and an oxidized olefin polymer and the prereaction product is reacted with an aldehyde.Type: GrantFiled: May 16, 1986Date of Patent: May 5, 1987Assignee: Amoco CorporationInventors: Yoon S. Song, Henry A. McCandless
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Patent number: 4605706Abstract: A chelate resin having a functional group of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen, alkyl, aminoalkyl, phenyl or a substituted group thereof and another functional group of the formula: ##STR2## wherein R.sub.3 is amino, alkylamino, polyethylenepolyamino, hydrazo, hydrazino, hydrazono, amidino, guanidino, semicarbazide or a substituted group thereof, has an excellent adsorption capacity for metal ions.Type: GrantFiled: May 28, 1985Date of Patent: August 12, 1986Assignee: Sumitomo Chemical Company, LimitedInventors: Yushin Kataoka, Masaaki Matsuda, Kenji Ochi, Masahiro Aoi
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Patent number: 4595731Abstract: Water soluble polyamines useful as flocculating agents are prepared by reaction of acrylonitrile polymers in solution with dialkylaminoalkylamines using ammonium polysulfide as catalyst.Type: GrantFiled: August 29, 1985Date of Patent: June 17, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: William K. Wilkinson
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Patent number: 4594396Abstract: A cure system for halogen-containing polymers that comprises a thiourea derivative, a thiuram sulfide and an inorganic base yields stable cross-linked products with useful properties when incorporated into normal vulcanization procedures.Type: GrantFiled: December 5, 1984Date of Patent: June 10, 1986Assignee: Hercules IncorporatedInventor: Dominick A. Berta
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Patent number: 4571420Abstract: Compositions which remain flexible when cured comprising low T.sub.g polymers containing pendant unsaturation, polyfunctional mercaptan, and vanadium compound, are disclosed. The compositions, which cure upon exposure to air and become tack-free rapidly, are especially suitable for roof mastics, coatings, and caulks.Type: GrantFiled: February 17, 1984Date of Patent: February 18, 1986Assignee: Rohm and Haas CompanyInventor: Allen P. Marks
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Patent number: 4551505Abstract: The crosslinking of chlorinated polyethylene with 2,5-dimercapto-1,3,4-thiadiazole in the presence of a basic substance may be carried out easily and leads to improved vulcanizate properties if amido amines, for example tetraethylene pentamine distearate, are used as the basic substances.Type: GrantFiled: September 25, 1984Date of Patent: November 5, 1985Assignee: Rhein-Chemie Rheinau GmbHInventors: Michael Sauerbier, Helfried Ehrend
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Patent number: 4529766Abstract: A preferred carboxylated nitrile rubber is prepared by polymerizing a diene, a nitrile and a small amount of an acrylic acid, which rubber has distributed therethrough an amount of alkyl or alkenyl monocitrate to obtain improved scorch time and reduced cure time.Type: GrantFiled: June 8, 1984Date of Patent: July 16, 1985Assignee: The B. F. Goodrich CompanyInventor: Philip H. Starmer
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Patent number: 4526935Abstract: Water soluble polyamines useful as flocculating agents are prepared by reaction of acrylonitrile polymers in solution with dialkylaminoalkylamines using ammonium polysulfide as catalyst.Type: GrantFiled: May 6, 1983Date of Patent: July 2, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: William K. Wilkinson
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Patent number: 4481131Abstract: An electroconductive polyolefin composition comprising (1) 100 parts by weight of a polyolefin resin, (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight of sulfur and (4) at least 0.1 part by weight of one or two specified accelerators, and optionally containing 5 to 60 parts by weight of atactic polypropylene.Type: GrantFiled: February 11, 1982Date of Patent: November 6, 1984Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoichi Kawai, Yoshihisa Gotoh, Masami Maki, Sachio Yokote, Katsumi Sekiguchi, Katsuyoshi Sasagawa, Masao Imai
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Patent number: 4433114Abstract: Improved tack, green strength or non-black filler interaction capability are realized in a treated diene rubber. The method of treating diene rubber to achieve the improvements is shown, together with a composition in which maleamic acid or derivatives of maleamic acid are combined with sulfur or an organic sulfur compound capable of generating a thiyl radical.Type: GrantFiled: May 20, 1982Date of Patent: February 21, 1984Assignee: Monsanto CompanyInventors: Aubert Y. Coran, Chester D. Trivette, Jr.
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Patent number: 4408012Abstract: A novel chelate polymer having the formula: ##STR1## wherein R is a 2-thiazolyl or 2-benzothiazolyl group, is produced by reacting polymaleimide, formaldehyde, and m-aminobenzoic acid in the presence of a solvent, then coupling the resultant reaction product with a diazotized compound of 2-aminothiazole or 2-aminobenzothiazole. The novel polymers thus produced are useful as metal indicators or pH indicators.Type: GrantFiled: March 1, 1982Date of Patent: October 4, 1983Assignees: Agnency of Industrial Science and Technology, Ministry of International Trade and IndustryInventors: Setsuko Furuya, Shunji Ohnishi, Masao Kato
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Patent number: 4405758Abstract: Dual cure site acrylate rubbers having both carboxyl and active halogen groups are compounded with a combination of sodium stearate and a tetramethyl thiuram disulfide or a Group IB, IIB, IVA, VA, and VIA metal compound thereof to provide compounded acrylate rubbers having an excellent scorch/cure rate balance and desirable physical properties in the vulcanizates thereof.Type: GrantFiled: May 17, 1982Date of Patent: September 20, 1983Assignee: The B. F. Goodrich CompanyInventor: Dane E. Jablonski
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Patent number: 4351926Abstract: A process for making a heat-curable polymer comprising the steps of:(a) preparing a mixture comprising:alkylene-alkyl acrylate copolymer;from 0.1 to 10 parts by weight based on 100 parts by weight of copolymer of difunctional compound having the formulaR.sub.1 --R.sub.2 --R.sub.3wherein R.sub.1 and R.sub.3 are independently selected from the group consisting of --OH, --SH, ##STR1## wherein R.sub.4 is C.sub.1 to C.sub.20 hydrocarbon; R.sub.2 is a divalent organic radical terminated with other than aryl;from 0.1 to 10 parts by weight based on 100 parts by weight of the copolymer of organo titanate;(b) heating said mixture to temperature of between the melting temperature of the copolymer and about 200.degree. C.Type: GrantFiled: December 26, 1979Date of Patent: September 28, 1982Assignee: Union Carbide CorporationInventor: Michael J. Keogh
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Patent number: 4289861Abstract: A curable composition consisting essentially of (A) at least one rubber selected from the group consisting of a styrene-butadiene rubber, an acrylonitrile-butadiene rubber, a polybutadiene rubber, an acrylonitrile-isoprene rubber, an alfin rubber, a butadiene-methyl methacrylate rubber, a polyisoprene rubber, an acrylonitrile-butadiene-isoprene rubber, a carboxylated acrylonitrile-butadiene rubber, a propylene oxide rubber, a propylene-butadiene rubber, and natural rubber, (B) at least one curing agent selected from the group consisting of sulfur and sulfur donors, and (C) at least one compound, as a vulcanization accelerator not requiring an activator, selected from the group consisting of arginine, lysine, hydroxy-lysine, ornithine, proline, hydroxyproline, leucine, isoleucine, histidine, tryptophan, threonine, serine, homoserine, alanine, phenylalanine, valine, methionine, citrulline, tyrosine, asparagine, aspartic acid, glutamine, glutamic acid, and salts of these amino acids.Type: GrantFiled: December 9, 1976Date of Patent: September 15, 1981Assignee: Sanyo Trading Co., Ltd.Inventor: Masao Onizawa
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Patent number: 4286079Abstract: A halogenated polyethylene, or a mixture of it with a sulfur-curable rubber and/or a vinyl chloride resin can be cured with a combination of sulfur and/or a sulfur donor, and at least one amino acid selected from the group consisting of lysine, ornithine, arginine and proline.Type: GrantFiled: December 31, 1979Date of Patent: August 25, 1981Assignee: Sanyo Trading Co., Inc.Inventor: Masao Onizawa
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Patent number: 4284743Abstract: A process for the cross-linking of high density polyethylene in the solid state according to which the polyethylene is admixed with the agents normally used for the vulcanization of unsaturated rubber compounds, then processed into the desired article and thereafter cross-linked at a temperature lower than the melting point of the polyethylene, the process being carried out in polyethylene containing a certain number of unsaturated bonds along the polymer chain.Type: GrantFiled: December 17, 1979Date of Patent: August 18, 1981Assignee: Anic S.p.A.Inventors: Gian P. Giuliani, Roberto Paiella