Heterocyclic Ring Contains Sulfur And Nitrogen Atoms Patents (Class 525/349)
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Patent number: 5151468Abstract: A low heat generation type rubber composition is disclosed, which comprises at least one rubber selected from the group consisting essentially of natural rubber and a synthetic diene rubber, a reinforcing filler, and a thiadiazole compound expressed by the following general formula: ##STR1## in which R.sub.1 and R.sub.2, which may be the same as or differ from each other, denote a mercapto group, an amino group and a trifluoromethyl group. The reinforcing filler and the thiadiazole compound are contained in amounts of 20 to 150 parts by weight and 0.1 to 10 parts by weight, respectively.Type: GrantFiled: July 12, 1990Date of Patent: September 29, 1992Assignee: Bridgestone CorporationInventors: Ichiro Nakajima, Kazuya Hatakeyama, Yasushi Hirata
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Patent number: 5147569Abstract: A polymeric additive prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha-monoolefin and a non-conjugated dienes or triene comprising from about 15 to 80 mole percent of ethylene and from about 20 to 85 mole percent of the (C.sub.3 -C.sub.10) alpha-monoolefin and from about 0 to 15 mole percent of the diene or triene. This polymeric substrate has a number average molecular weight ranging from about 5,000 to about 500,000. It is modified by reacting the polymer with an unsaturated epoxide wherein the intermediate graft co- or terpolymer is characterized as having pendant epoxides within the substrate.Post-reacting this graft co- or terpolymer with 1,3,4-thiadiazine modified with substituted phenols, diaryl amines, or phenophiazines generates a polymeric lubricant additive with enhanced anti-oxidant, dispersant, and anti-wear properties.Type: GrantFiled: September 4, 1990Date of Patent: September 15, 1992Assignee: Texaco Inc.Inventors: Thomas F. DeRosa, Benjamin J. Kaufman, Rosemary J. Jennejahn
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Patent number: 5110491Abstract: A railway diesel crankcase lubricant composition comprising a major portion of a diesel lubricating oil and a minor amount of, as an oxidation and corrosion inhibiting agent, a condensate product prepared by the process comprising:(a) reacting a dibasic acid anhydride, separately, with:(i) a oligomeric isobutylene, and(ii) 2,5-dimercapto-1,3,4,-thiadiazole, to produce, respectively, oligomeric(isobutylene-g-succinic anhydride) and 2-thio-(5-mercapto-1,3,4-thiadiazole) succinic anhydride;(b) reacting both of the succinic anhydrides with pentamethylenediamine to produce the [2-thio-(5-mercapto-1,3,4-thiadiazole)]-[oligomeric(isobutylene-g-succinic )]-pentamethylenetetraamine-bis succinimide product; and(c) recovering the bis-succinimide product.Type: GrantFiled: April 22, 1991Date of Patent: May 5, 1992Assignee: Texaco Inc.Inventors: Thomas F. Derosa, Rodney L. Sung, Benjamin J. Kaufman, Ronald L. O'Rourke
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Patent number: 5104916Abstract: A vulcanization composition for elastomers, the compostion comprising, by weight: 0.5 parts to 3 parts mercaptobenzothiazole, 0.5 parts to 3 parts tetramethylthiuram disulfide, 3 parts to 5 parts zinc oxide, 1 part to 3 parts stearic acid, 1 part to 4 parts anti-oxidant, and 1 part to 5 parts vulcanization agent constituted by 0% to 100% sublimated sulfur, 0% to 75% sulfur donor selected from thiurams and dithiomorpholines, and 0% to 50% sulfenamide, with the weight ratio of sulfenamide to sulfur donor lying in the range 1/3 to 1. The invention is applicable to vulcanizing a three-sequence copolymer of styrene-butadiene-styrene mixed with bitumen.Type: GrantFiled: May 28, 1991Date of Patent: April 14, 1992Assignee: Societe Anonyme d'Application des Derives de l'Asphalte-S.A.A.D.A.Inventors: Cu C. Trinh, Denis Million
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Patent number: 5095068Abstract: A roofing adhesive particularly suited for use in connection with membrane roofing materials such as EPDM or neoprene is preferably compounded from butyl rubber, a cross-linking system for the butyl rubber and a tackifier. The tensile strength, elongation, modulus at 300% elongation and modulus at failure of the composition are adjusted within range by choice of components and concentration. The adhesive composition may preferably be formed into a tape for joining sheets of the membrane roofing material.Type: GrantFiled: July 3, 1989Date of Patent: March 10, 1992Assignee: Ashland Oil, Inc.Inventor: Jessie T. Chiu
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Patent number: 5036142Abstract: The invention provides a method for making optionally active polymers having a carbon-to-carbon backbone chain and pendant "transducer" groups having an azo linkage which involves azo-coupling, in homogeneous solution, a carbon-to-carbon backbone polymer having pendant groups terminating in an aromatic group with an aromatic diazonium salt, and recovering the resultant reaction product.Type: GrantFiled: December 26, 1989Date of Patent: July 30, 1991Assignee: Allied-Signal Inc.Inventor: Chengjiu Wu
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Patent number: 5034468Abstract: N-halothiosulfonamide-modified rubber products are provided. The modified rubber products are prepared by reaction of a rubber, such as a butyl rubber or a halogenated butyl rubber, with a N-halothiosulfonamide in the absence or in the presence of a catalyst.Type: GrantFiled: November 20, 1989Date of Patent: July 23, 1991Assignee: Exxon Chemical Patents Inc.Inventor: Donald A. White
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Patent number: 5010142Abstract: Rubber compositions are disclosed for use as inner liners in automobile tires. Sulfur-vulcanizable, halogenated butyl rubbers are combined with 2-(4'-morpholinodithio)benzothiazole, whereby the resulting composition is rendered highly tacky and satisfactorily processable.Type: GrantFiled: October 3, 1989Date of Patent: April 23, 1991Assignee: The Yokohama Rubber Co., Ltd.Inventor: Haruhiro Takano
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Patent number: 5004787Abstract: A vulcanizable rubber composition containing (i) (A) a chlorine-containing rubber and (B) a triazinethiol.amine salt or (ii) (a) a chlorine-containing rubber, (b) a triazinethiol as a vulcanization agent, and (c), as a vulcanization agent, (c-1) an aromatic carboxylic acid amine salt, (c-2) an aliphatic carboxylic acid amine salt, and (c-3) a phenolamine salt.Type: GrantFiled: May 19, 1988Date of Patent: April 2, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Keiji Okada, Takashi Nakahara, Yoshiharu Kikuchi
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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: 4965323Abstract: A rubber composition comprising a nitrile group-containing hydrocarbon rubber and a vulcanizing system, characterized in that the iodine value of said rubber does not exceed 120 and the pH of the tetrahydrofuran solution of said rubber is at least 5.Type: GrantFiled: June 1, 1987Date of Patent: October 23, 1990Assignee: Nippon Zeon Co., Ltd.Inventors: Noboru Watanabe, Yoichiro Kubo
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Patent number: 4952637Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.Type: GrantFiled: July 22, 1988Date of Patent: August 28, 1990Assignee: Texaco Inc.Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney Lu-Dai Sung
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Patent number: 4948843Abstract: Dye-containing polymers wherein the dyes are organic in nature are incorporated into glasses produced by a sol-gel technique. The glasses may be inorganic or organic-modified metal oxide heteropolycondensates. The dye-containing polymers are covalently bonded to the glass through a linking group. The products of this invention can be used to make optically clear colored films which can be employed in the imaging, optical, solar heat energy and related arts.Type: GrantFiled: May 30, 1989Date of Patent: August 14, 1990Assignee: Eastman Kodak CompanyInventors: Michael R. Roberts, Bradley K. Coltrain, Sharon M. Melpolder
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Patent number: 4925904Abstract: A new composition is disclosed which contains a cross linkable unsaturated polyester and a phenothiazine. The new composition has substantially improved shelf life and is particularly useful as an adhesive and for trowelling.Type: GrantFiled: August 4, 1988Date of Patent: May 15, 1990Assignee: Hilti AktiengesellschaftInventor: Arno P. O. Schmidt
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Patent number: 4910267Abstract: An anti-degrading rubber article to be used in contact with a mineral oil containing an oil modifier, at least that surface of said rubber article which is to come into contact with said mineral oil being composed substantially of a vulcanization product, obtained by using a sulfur vulcanization system, of a copolymer rubber having polymer chains consisting of(1) 10 to 60% by weight of units derived from an unsaturated nitride,(2) 2 to 30% by weight of units derived from a conjugated diene, and(3) 88 to 10% by weight of units derived from a copolymerizable ethylenically unsaturated monomer other than the unsaturated nitride and/or units resulting from the hydrogenation of units derived from a conjugated diene.Type: GrantFiled: February 10, 1988Date of Patent: March 20, 1990Assignee: Nippon Zeon Co., Ltd.Inventors: Motofumi Oyama, Yoichiro Kubo, Toshiharu Honda
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Patent number: 4866138Abstract: A method for, and compositions, providing vulcanizable compounds of unsaturated polymers having an improved balance of scorch time and cure rates, ie., slow scorch times and fast cure rates, comprising adding to said vulcanizable polymers accelerating amounts of benzothiazolesulfenamides selected from the group consisting of N-oxydiethylene-2-benzothiazole sulfenamide, N-t-butyl-2-benzothiazole sulfenamide and N-cyclohexyl-2-benzothiazole sulfenamide, with N-oxydiethylenethiocarbamyl-N'-t-alkyl sulfenamides wherein the alkyl radicals contain 4 to 8 carbon atoms.Type: GrantFiled: March 15, 1988Date of Patent: September 12, 1989Assignee: The B. F. Goodrich CompanyInventor: Dwight W. Chasar
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Patent number: 4861842Abstract: The present invention relates to a cure system for a sulfur vulcanizable rubber. The cure system comprises:(a) from about 0.50 to about 2.0 phr of a sulfenamide accelerator selected from the group consisting of N-oxydiethylene benzothiazole-2 sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, N-t-butyl-2-benzothiazole sulfenamide and N-oxydiethylene-thiocarbamyl-N'-oxydiethylene sulfenamide;(b) from about 0.10 to about 1.0 phr of a guanidine accelerator selected from the group consisting of diphenyl guanidine and di-ortho-tolylguanidine;(c) from about 0.10 to about 1.0 phr of a thiuram accelerator selected from the group consisting of tetraethyl thiuramdisulfide, tetramethyl thiuram monosulfide, tetramethyl thiuramdisulfide;(d) from about 0.05 to about 1.0 phr of mercapto benzothiazyl disulfide;(e) from about 0.75 to about 3.0 phr of a sulfur vulcanizing agent;(f) from about 0.05 to about 0.50 phr of N-cyclohexylthio-phthalimide;(g) from about 1.0 to about 5.Type: GrantFiled: December 28, 1988Date of Patent: August 29, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Martin P. Cohen, Robert J. Brown, Norbert Majerus
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Patent number: 4853439Abstract: A novel, highly water soluble complex of a substantially insoluble organic compound and a solid homopolymer or copolymer of N-vinyl-2-pyrrolidone. The complex exhibits water solubilities in excess of about 25-fold that of the insoluble organic compound. A method for producing the complex is disclosed wherein the polymer and insoluble compound are dissolved in a mutual solvent, allowed to react for a period of time sufficient to form the complex, and then the solvent is removed to produce the dried highly water-soluble complex.Type: GrantFiled: October 9, 1987Date of Patent: August 1, 1989Assignee: GAF CorporationInventor: Eugene S. Barabas
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Patent number: 4835209Abstract: The present invention relates to a rubber-like polybutadiene or a rubber-like butadiene-styrene copolymer suited for use in tire treads which are obtained by polymerization of the monomer(s) in the presence of an organolithium catalyst, followed by reacting a carbodiimide with the reactant product thereof so as to subject it to reaction at its living point, and if necessary, further reacting the product thus obtained with a trifunctional or higher-order coupling agent. The invention further relates to a process for the production thereof, and a rubber composition containing more than a definite amount of said polymer.Type: GrantFiled: March 16, 1987Date of Patent: May 30, 1989Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yuichi Kitagawa, Haruo Yamada, Akira Saito
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Patent number: 4820776Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived fron N-vinyl pyrrolidone and phenothiazine.Type: GrantFiled: April 24, 1985Date of Patent: April 11, 1989Assignee: Texaco Inc.Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney L. Sung
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Patent number: 4812517Abstract: Acrylic AB block copolymers that are useful as pigment dispersants and which are resistant to yellowing and other color changes, characterized by aromatic substituents bonded to the A segment of the block copolymer.Type: GrantFiled: December 28, 1987Date of Patent: March 14, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Michael W. J. West
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Patent number: 4808666Abstract: This invention relates to the discovery that a morpholine polysulfide, such as morpholine tetrasulfide, in combination with a substituted triazine having at least one dialkyl dithiocarbamyl radical provides for excellent vulcanization of rubbers and results in an improved final rubber vulcanizate possessing superior physical properties and reversion resistance.Type: GrantFiled: December 28, 1987Date of Patent: February 28, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Martin P. Cohen, Richard M. D'Sidocky
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Patent number: 4791173Abstract: A synthetic rubber (SR) tire tread of styrene-butadiene rubber (SBR) and butyl rubber which SR is essentially free of natural rubber (NR), upon vulcanization with sulfur in the presence of a combination of sulfenamide accelerators, provides excellent oxidative stability, resistance to hardening, and flex resistance, despite increasing the level of sulfur to an amount in the range from 2.0-3.0 phr, as long as the total amount of sulfenamide accelerators is less than 2.0 phr and there is more TCS than BTS. The crosslink network generated by the use of TCS in combination with BTS, which combination produces poor oxidation stability in a predominantly NR containing rubber, is not produced in SR.Type: GrantFiled: July 17, 1987Date of Patent: December 13, 1988Assignee: The B F Goodrich CompanyInventor: Robert W. Layer
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Patent number: 4684698Abstract: The invention relates to the novel water soluble chlorothiazide-furosemide-poly(N-vinyl-2-pyrrolidone) complex which is derived from the reaction of these components in alkaline media and to the process for the preparation of said complex.Type: GrantFiled: May 2, 1986Date of Patent: August 4, 1987Assignee: GAF CorporationInventor: Eugene S. Barabas
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Patent number: 4683270Abstract: The present invention relates to a polymeric composition which may be processed with increased scorch safety while retaining good physical properties. The composition of the invention comprises the combination of a specific retarder (vulcanization inhibitor) and at least one of two specific accelerators, and such composition prevents premature vulcanization of the chloroprene while it is being mixed and processed, yet provides excellent cure characteristics at the proper time, producing polymeric products with excellent dynamic properties.Type: GrantFiled: November 18, 1985Date of Patent: July 28, 1987Assignee: Dayco Products, Inc.Inventor: Gerald C. Hollaway, Jr.
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Patent number: 4631316Abstract: A compound of the formulaR.sup.1 --NHC(O)NHSC(S)NR.sup.2 R.sup.3wherein R.sup.1 is phenyl; phenyl substituted with halogen, alkyl, NR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are the same or different and are hydrogen or alkyl; alkoxy, alkylthio, methylenedioxy, COOR.sup.6 wherein R.sup.6 is alkyl; or NHCOOR wherein R.sup.7 is alkyl; R.sup.2 and R.sup.3 are the same or different and are alkyl, cycloalkyl or aralkyl, and R.sup.2 plus R.sup.3 are alkylene, oxydialkylene or thiodialkylene.Type: GrantFiled: March 1, 1984Date of Patent: December 23, 1986Assignee: Uniroyal Chemical Company, Inc.Inventor: Joseph F. Stieber
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Patent number: 4609713Abstract: A process for crosslinking a polymer containing a plurality of secondary amine moieties involves contacting said polymer with a phenothiazinium compound under conditions sufficient to provide a polymer crosslinked through said amine moieties. The crosslinked polymers are useful as anion exchange resins.Type: GrantFiled: March 26, 1985Date of Patent: September 2, 1986Assignee: The Dow Chemical CompanyInventor: Willie C. Burton
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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: 4604429Abstract: Fungicides containing ammonium salts of polyacids of the formula ##STR1## where R.sup.1 is alkyl, cycloalkyl, cycloalkylalkyl or aralkyl, R.sup.2 and R.sup.3 are each hydrogen, hydroxyl, CH.sub.2 OH or C.sub.1 -C.sub.3 -alkyl, Z is CH.sub.2, O, S, CO or (CH.sub.2).sub.2 and Y is an anion of a copolymeric acid.Type: GrantFiled: November 19, 1984Date of Patent: August 5, 1986Assignee: BASF AktiengesellschaftInventors: Eberhard Ammermann, Ernst Buschmann, Gregor Ley, Ernst-Heinrich Pommer
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Patent number: 4588637Abstract: A roofing adhesive particularly suited for use in connection with membrane roofing materials such as EPDM or neoprene is preferably compounded from butyl rubber, a cross-linking system for the butyl rubber and a tackifier. The tensile strength, elongation, modulus at 300% elongation and modulus at failure of the composition are adjusted within range by choice of components and concentration. The adhesive composition may preferably be formed into a tape for joining sheets of the membrane roofing material.Type: GrantFiled: March 5, 1984Date of Patent: May 13, 1986Assignee: Rockcor, Inc.Inventor: Jessie T. Chiu
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Patent number: 4575531Abstract: Sulfur vulcanizable partially hydrolyzed ethylene-vinyl acetate terpolymers and processes for producing these products are disclosed.Type: GrantFiled: November 7, 1984Date of Patent: March 11, 1986Assignee: National Distillers and Chemical CorporationInventors: John M. Hoyt, Steven D. Blazey
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Patent number: 4559390Abstract: A method of preventing degradation of vulcanized rubber materials used in the operation of oil and gas wells comprising forming said rubber material from a sulfur vulcanized composition comprising a copolymer rubber having in the polymer chain (I) 10 to 60% by weight of a unit from an unsaturated nitrile, (II) not more than 10% by weight of a unit from a conjugated diene, and (III) 30 to 90% by weight of a unit from an ethylenically unsaturated monomer other than the unsaturated nitrile and/or a unit resulting from the hydrogenation of a unit from a conjugated diene, said rubber being vulcanized with a sulfur vulcanization system.Type: GrantFiled: June 7, 1984Date of Patent: December 17, 1985Assignee: Nippon Zeon Co., Ltd.Inventors: Noboru Watanabe, Motofumi Oyama, Yoichiro Kubo
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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: 4542190Abstract: A cis-1,4-polyisoprene rubber composition capable of giving a vulcanizate having improved strength, said composition comprising (1) a synthetic cis-1,4-polyisoprene rubber having epoxy groups, (2) a compound having at least two primary amino groups, and (3) a sulfur vulcanization system.Type: GrantFiled: June 22, 1982Date of Patent: September 17, 1985Assignee: Nippon Zeon Co LtdInventors: Shizuo Kitahara, Toshihiro Fujii, Nagatoshi Sugi
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Patent number: 4540742Abstract: Under particular conditions, a cationic ring-opening polymerization of an oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-containing backbone of a polymer ("HCB") and a particular catalyst, produces a polymerization having `living polymerization` characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is a graft copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer. The HCB, which may have from 1 to about 400 pendant OH groups, and more preferably at least 7 pendant OH groups, provides grafting sites for the grafting segments. Where a grafted segment contains halogen, the segment may be aminated. If the HCB is hydrophobic, the aminated block copolymer is amphiphilic.Type: GrantFiled: November 12, 1982Date of Patent: September 10, 1985Assignee: The B. F. Goodrich CompanyInventor: Yoshihisa Okamoto
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Patent number: 4524185Abstract: The properties of halogen-containing elastomers are improved by incorporating into the elastomer before vulcanization from about 0.05 to about 3 parts by weight of dimercaptothiodiazole (DMTD), and from about 0.5 to about 5 parts by weight of a dithiocarbamate type accelerator per 100 parts of elastomer. Zinc di-n-butyldithiocarbamate and dimercaptothiodiazole in acrylic elastomers containing active chlorine is disclosed as a preferred combination.Type: GrantFiled: March 7, 1983Date of Patent: June 18, 1985Assignee: Federal-Mogul CorporationInventor: Robert F. Hinderer
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Patent number: 4485211Abstract: Under particular conditions, a cationic ring-opening polymerization of a first oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-containing organic material ("HCM"), for example a polymer (referred to herein as a `hydroxyl-prepolymer`), and a particular catalyst, produces a polymerization having `living polymerization` characteristics. The result is that molecular weight (mol wt) of the resulting polymer is directly proportional to the conversion of the monomer to said resulting polymer. This HCM serves as a chain propagator which initially furnishes OH groups as propagation sites. Subsequently, a second oxirane monomer, different from said first, is sequentially polymerized to yield a block copolymer. Branched block copolymers, or linear block copolymers of a HCM and (a) one or more glycidyl ethers, or (b) a haloalkyl epoxide and at least one glycidyl ether, may be prepared.Type: GrantFiled: September 15, 1982Date of Patent: November 27, 1984Assignee: The B. F. Goodrich CompanyInventor: Yoshihisa Okamoto
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Patent number: 4482681Abstract: Halogen-containing polymers can be crosslinked by heat-curing with a crosslinking system made up of a crosslinking agent which is either a polymercaptan or an ester derivative thereof, a basic material and a hydrated salt. When the hydrated salt is chosen so that it releases its water of hydration during heat-curing the rate of crosslinking is enhanced.Type: GrantFiled: September 29, 1982Date of Patent: November 13, 1984Assignee: Hercules IncorporatedInventors: Dominic A. Berta, Vernon L. Kyllingstad
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Patent number: 4477634Abstract: Semipermeable membranes of polyacrylonitrile or copolymers of acrylonitrile and other ethylenically unsaturated monomers are chemically modified through reaction with (a) hydroxylamine and (b) a poly functional ionic colorless cyclic carbonic acid imide-halide capable of reaction with amidoxime groups, and optionally containing ionic groups. The new membranes show good compaction and solvent resistance and are stable over a broad temperature and pH range. They are suitable for reverse osmosis and especially ultrafiltration processes.Type: GrantFiled: March 8, 1982Date of Patent: October 16, 1984Assignee: Aligena AGInventors: Charles Linder, Gershon Aviv, Mordechai Perry, Reuven Kotraro
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Patent number: 4451618Abstract: Under particular conditions, a cationic ring-opening polymerization of an (single) oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-terminated prepolymer ("HTP") and a particular catalyst, produces a polymerization having `living polymerization` characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is an AB or ABA type block copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer to the block copolymer. The HTP which may be a mono-, di-, tri-, or tetra-hydroxyl-terminated prepolymer, serves as a chain propagator which initially furnishes OH groups as propagation sites. Linear block copolymers or branched block copolymers are formed, depending upon the structure of the HTP. Where one segment of an AB or ABA type block contains halogen, the segment may be aminated.Type: GrantFiled: September 29, 1982Date of Patent: May 29, 1984Assignee: The B. F. Goodrich CompanyInventor: Yoshihisa Okamoto
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Patent number: 4434274Abstract: Dual cure site acrylate elastomers containing both active halogen and carboxyl groups are compounded with a combination of 2,5-dimercapto-1,3,4-thiadiazole, a Group IVA metal oxide or salt thereof and a tetraalkyl thiuram sulfide to provide compounds having an excellent scorch/cure rate balance and balance of desirable physical properties in the vulcanizates thereof.Type: GrantFiled: April 12, 1982Date of Patent: February 28, 1984Assignee: The B. F. Goodrich CompanyInventor: Dane E. Jablonski
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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: 4410704Abstract: N-substituted benzothiazole-2-sulfonamide compounds represented by the general formula: ##STR1## wherein R is selected from the group consisting of benzothiazolyl or substituted benzothiazolyl represented by the general formula: ##STR2## wherein X is selected from the group consisting of halogen, lower alkyl, lower alkoxy, acetamido or nitro;R' is selected from the group consisting of hydrogen, alkyl, cycloalkyl, benzyl, phenyl, naphthyl, R"--S--, or substituted aryl represented by the general formula: ##STR3## wherein Y is selected from the group consisting of halogen, lower alkyl, or nitro, or mixtures thereof; andR" being selected from the group consisting of alkyl, cycloalkyl, benzyl, phenyl, naphthyl, trichloromethyl or substituted aryl represented by the general formula: ##STR4## wherein Z is selected from the group consisting of halogen, lower alkyl, nitro or carboxy.Methods of making and using the inventive compounds, including their use as scorch retardants.Type: GrantFiled: April 15, 1981Date of Patent: October 18, 1983Assignee: Sanshin Kagaku Kogyo Co., Ltd.Inventors: Yutaka Kawaoka, Hideo Oda, Masataka Yasumoto, Kazuya Hirota, Yuji Ishinaga, Masakazu Morita
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Patent number: 4404329Abstract: A rubber composition comprising (1) a partially hydrogenated copolymer rubber composed of 10 to 50% by weight of an acrylonitrile unit, 25 to 88% by weight of a hydrogenated conjugated diene unit and 2 to 25% by weight of a conjugated diene unit, and (2) a sulfur vulcanizer system. The composition can give vulcanizates having improved ozone cracking resistance and oil resistance.Type: GrantFiled: June 10, 1980Date of Patent: September 13, 1983Assignee: Nippon Zeon Co., Ltd.Inventors: Akio Maeda, Kinro Hashimoto, Shigelu Yagishita, Masaaki Inagami, Hiroshi Fukushima
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Patent number: 4399262Abstract: Dual cure site acrylate rubbers having both carboxyl and active halogen groups are compounded with a combination of 2,3-dimercapto-1,3,4-thiadiazole and a Group IB, IIB, IVA, VA, or VIA metal compound of a tetraalkyl thiuram sulfide to provide compounded acrylate rubbers having an excellent scorch/cure rate balance and desirable physical properties in the vulcanizates thereof.Type: GrantFiled: April 12, 1982Date of Patent: August 16, 1983Assignee: The B. F. Goodrich CompanyInventor: Dane E. Jablonski
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Patent number: 4394487Abstract: Adsorbents are provided for the affinity-specific separation of macromolecular materials, particularly biopolymers, the adsorbents comprising a polymeric carrier on to which an affine residue for the macromolecular material is covalently bound, either directly or via polymeric spacer. Preferred affine residue is comprised of a specific complex formers which are base-specific and/or structure specific for the macromolecular material. The invention also provides novel complex formers comprising a certain dyestuff residues and processes for their preparation.Type: GrantFiled: October 7, 1981Date of Patent: July 19, 1983Assignee: Boehringer Mannheim GmbHInventors: Werner Muller, Hans Bunemann
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Patent number: 4357446Abstract: A curable composition of a halogen-containing polymer composed of(1) 100 parts by weight of a halogen-containing polymer,(2) as a crosslinking agent, about 0.1 to about 10 parts by weight of a 2,3-dimercapto-pyrazine or -quinoxaline compound having the following formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are identical or different and represent hydrogen or organic radicals, and(3) as an acid acceptor, about 0.5 to about 50 parts by weight of a compound of a metal of Group II of IVa of the periodic table.Type: GrantFiled: February 27, 1981Date of Patent: November 2, 1982Assignee: Osaka Soda Co. Ltd.Inventor: Yasuo Matoba
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Patent number: 4309318Abstract: A tread composition for low rolling resistance tires, comprising 100 parts by weight of styrene-butadiene rubber or a styrene-butadiene rubber-based rubber blend and 3.2-5.0 parts by weight of sulphur.Type: GrantFiled: November 16, 1979Date of Patent: January 5, 1982Assignee: Yokohama Rubber Co., Ltd.Inventors: Asahiro Ahagon, Makoto Misawa, Hiroshi Hirakawa, Kazuo Miyasaka
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Patent number: 4306992Abstract: A mixture comprising sulphur or a sulphur donor, a mercapto- or sulfenamide vulcanization accelerator, a compound containing a thiophenyl radical and a standard auxiliary accelerator is used as a vulcanization system for natural or synthetic rubber.Type: GrantFiled: May 5, 1980Date of Patent: December 22, 1981Assignee: Bayer AktiengesellschaftInventors: Rudiger Schubart, Ulrich Eholzer, Theo Kempermann, Ernst Roos
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Patent number: RE31322Abstract: A process for producing a sulfur-curable acrylic rubber is provided which comprises radical-copolymerizing (1) an alkyl acrylate with (2) an alkenyl acrylate or methacrylate, or radical-copolymerizing (1) an alkyl acrylate, (2) an alkenyl acrylate or methacrylate, (3) an alkoxyalkyl acrylate and optionally (4) acrylonitrile. These acrylic rubbers can be cured at a rate as fast as those for curing diene-type rubbers, and the cured products exhibit superior properties without long heat-treatment after curing.Type: GrantFiled: September 23, 1981Date of Patent: July 26, 1983Assignee: Nippon Zeon Co. Ltd.Inventors: Tetsu Ohishi, Kohichi Handa, Haruo Ueno