THERMOPLASTIC SILICONE ELASTOMERS FORMED FROM POLYESTER RESINS

摘要

The present invention, therefore, relates to a method for preparing a thermoplastic elastomer comprising: (I) mixing (A) a thermoplastic resin comprising more that 50 percent by volume of a polyester resin other than poly(butylene terephthalate), said thermoplastic resin having a softening point of 23 DEG C to 300 DEG C, (B) a silicone elastomer comprising (B') 100 parts by weight of a diorganopolysiloxame gum having a plasticity of at least 30 and having an average of at least 2 alkenyl groups in its molecule and, optionally, (B") up to 200 parts by weight of a reinforcing filler, the weight ratio of said silicone elastomer (B) to said thermoplastic resin (A) is from 35:65 to 85:15, (C) 0.01 to 5 parts by weight of a stabilizer for each 100 parts by weight of said thermoplastic resin and said silicone elastomer, (D) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule and (E) a hydrogen groups in its molecule and (E) a hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said dioganopolysiloxane (B'); and (II) dynamically curing said diorganopolysiloxane (B').