THERMOPLASTIC SILICONE ELASTOMERS FROM COMPATIBILIZED POLYESTER RESINS

摘要

A method of preparing a thermoplastic elastomer, and compositions thereof, are disclosed comprising: I) mixing A) a thermoplastic resin comprising more than 50 percent by volume of a polyester resin having a softening point of 23 DEG C to 300 DEG C, B) a silicone elastomer comprising a diorganopolysiloxane, where the weight ratio of said silicone elastomer to said thermoplastic resin is from 35:65 to 85:15, C) a glycidyl ester compatibilizer, D) an organohydrido silicon compound, and E) a hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane; and II) dynamically vulcanizing said diorganopolysiloxane, 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 30 %.