THERMOPLASTIC SILICONE ELASTOMERS FORMED FROM POLYESTER RESINS
The present invention, therefore, relates to a method for preparing a thermoplastic elastomer, said method comprising: (I) mixing (A) a thermoplastic resin comprising more than 50 percent by volume of a polyester resin other than poly(butylene terephthalate), said thermoplastic resin having a soften...
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Main Authors | , , , , , , , |
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Format | Patent |
Language | English |
Published |
01.08.2002
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Online Access | Get full text |
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Summary: | The present invention, therefore, relates to a method for preparing a thermoplastic elastomer, said method comprising:
(I) mixing
(A) a thermoplastic resin comprising more than 50 percent by volume of a polyester resin other than poly(butylene terephthalate), said thermoplastic resin having a softening point of 23° C. to 300° C.,
(B) a silicone elastomer comprising
(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 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) being greater than 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 hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane (B′); and
(II) dynamically curing said diorganopolysiloxane (B′). |
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