| abstract |
A method for preparing a thermoplastic elastomer is disclosed, said method comprising (I) mixing n (A) a rheologically stable polyamide resin having a melting point or glass transition temperature of 25° C. to 275° C., n (B) a silicone base comprising n (B′) 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl radicals in its molecule and n (B″) 5 to 200 parts by weight of a reinforcing filler, n the weight ratio of said silicone base to said polyamide resin is from 35:65 to 85:15, n (C) 0.01 to 5 parts by weight of a stabilizer per 100 parts by weight of said polyamide resin plus said silicone base, said stabilizer being selected from hindered phenols; thioesters; hindered amines; 2,2′-(1,4-phenylene)bis(4H-3, 1-benzoxazin-4-one); and 3,5-di-tert-butyl-4-hydroxybenzoic acid, hexadecyl ester, n (D) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule and n (E) a hydrosilation catalyst, n components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane (B′); and n (II) dynamically curing said diorganopolysiloxane (B′), n wherein at least one property of the thermoplastic elastomer selected from tensile strength or elongation is at least 25% greater than the respective property for a corresponding simple blend wherein said diorganopolysiloxane is not cured and said thermoplastic elastomer has an elongation of at least 25%. |