Silicone macromers and thermoplastic flame retardant silicone-po

Details Silicone macromers and thermoplastic flame retardant silicone-po Silicone macromers and thermoplastic flame retardant silicone-po

1992-01-15

1993-04-20

Dean, Jr., Ralph H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 29, 528 15, 528 19, C08G 7746

Patent

active

052044386

ABSTRACT:
A silicone cyclic, such as hexaorganotrisiloxane is lithiated with an alkyl lithium compound followed by treatment with a diorganohalosilane to produce a polydiorganosiloxane having a terminal diorganohydridesiloxy unit. The platinum catalyzed addition of a 2-alkenyl-6-organophenol results in the production of a phenol-siloxane macromer. Conversion of the phenol-siloxane macromer to a silicone polyphenylene ether graft copolymer is effected by oxidatively coupling the 2,6-diorganophenol to the phenol-siloxane macromer.

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