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AssigneesThe Yokohama Rubber Co., Ltd., ExxonMobil Chemical Patents Inc.
InventorsEdward John Blok, Bruce Alan Harrington, Yuichi Hara, Shusaku Tomoi
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A stabilized, dynamically vulcanized thermoplastic elastomer composition comprising dispersed dynamically vulcanized particles of at least one first elastomer or rubber comprising halogenated isobutylene-containing elastomer and dispersed particles of at least one second elastomer or rubber comprising at least one functional group capable of reacting with and grafting to a polyamide, the particles of the at least one first and at least one second elastomers dispersed in a continuous thermoplastic polyamide or nylon resin matrix comprising at least one nylon homopolymer, nylon copolymer or mixture thereof, the composition or the at least one first elastomer further comprising at least one stabilizer against degradation induced by exposure to actinic, particularly ultraviolet, radiation. The compositions are preferably produced in a mixing extruder and are suitable for producing durable, flexible, thermoplastic elastomer fluid barrier films or layers useful in industrial articles such as vehicle tire innerliners and hoses.
A thermoplastic elastomer composition, said composition comprising a continuous thermoplastic resin selected from the group consisting of nylon 6, nylon 11, nylon 12, nylon 6/12 copolymer, nylon 6/66 copolymer and mixtures thereof, said thermoplastic resin having a Young's modulus of more than 500 MPa and an air permeation coefficient of less than 60×10−12 cc cm/cm2 sec cmHg at 30° C., dispersed particles of at least one first elastomer comprising halogenated isobutylene-containing elastomer selected from the group consisting of halogenated butyl rubber and halogenated poly(isobutylene-co-p-methylstyrene) copolymer and dispersed particles of at least one second elastomer having at least one functional group capable of grafting to the continuous thermoplastic resin matrix, said at least one second elastomer selected from the group consisting of maleic anhydride grafted styrene-ethylene/butadiene-styrene rubber, maleated ethylene-propylene copolymer rubber, maleated ethylene-butene rubber, maleated ethylene-hexene rubber, maleated ethylene-octene rubber, maleated ethylene-decene rubber, maleated ethylene-vinyl acetate copolymer, maleated ethylene-methyl acrylate copolymer, maleated ethylene-ethyl acrylate copolymer, and maleated ethylene-acrylic acid copolymer dispersed in the continuous thermoplastic resin, said composition or said at least one first elastomer further comprising at least one stabilizer against degradation induced by exposure to ultraviolet rays, wherein said stabilizer consists of (i) (a) 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol or (b) 2-(2H-benzotriazol-2-yl)-4,6-ditert-pentylphenol and (ii) 3,5-di-t-butyl-4-hydroxybenzoic acid, hexadecyl ester.
Dependencies are inferred from the claim text.