POLYOLEFIN THERMOPLASTIC SILICONE ELASTOMERS EMPLOYING RADICAL CURE

WIPO Patent Application WO2002088247

A3

Polyolefin thermoplastic elastomers are disclosed which are prepared by; (I) mixing (A) a thermoplastic resin comprising more than 50 percent by volume of a polyolefin resin, said thermoplastic resin having a softening point of 23 DEG C to 300 DEG C; (B) a silicone base comprising (B') 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having and average of at least 2 alkenyl groups per molecule, and optionally, (B") up to 200 parts by weight of a reinforcing filler, the weight ratio of said silicone base to said polyolefin thermoplastic resin is from 35:65 to 85:15; (C) a radical initiator, present in an amount sufficient to sure said diorganopolysiloxane gum (B'); and (II) dynamically vulconizing said diorganopolysiloxane gum, wherein at lest one property of the thermoplastic elastomer selected from tensile strenght or elongation is at least 25%greater thatn the respective property for a correspoinding simple blend wherein said diorganopolysiloxane gu is not cured and said thermoplastic elastomer has an elongation of at least 25%.

CHORVATH IGOR (US)
GRAY DEAN (US)
LEE MICHAEL K (US)
TANGNEY THOMAS (US)

PCT/US2002/009633

February 13, 2003

March 27, 2002

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DOW CORNING (US)
CHORVATH IGOR (US)
GRAY DEAN (US)
LEE MICHAEL K (US)
TANGNEY THOMAS (US)

C08L23/04; C08L53/02; C08L83/04; C08L83/07; (IPC1-7): C08J3/24; C08L23/00; C08L83/04

WO2000046291A1	2000-08-10
WO1999045072A1	1999-09-10

US6153691A	2000-11-28
US6013715A	2000-01-11
EP0984036A2	2000-03-08

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