Patent ID: 9540510
Date: 2017-01-10
CPC Classifications: C08K,C08L

Claim:
1. 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/cm 2 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.