Method for the manufacture of branched polysiloxane

Details Method for the manufacture of branched polysiloxane Method for the manufacture of branched polysiloxane

1993-02-18

1993-10-26

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 33, 528 34, 528 39, C08F28300

Patent

active

052567419

ABSTRACT:
The present invention is a novel method for the manufacture of branched polysiloxanes having the polysiloxane SiO.sub.4/2 unit as the branch center precisely bonded to one end of a diorganopolysiloxane. The present invention concerns a method for the manufacture of a branched polysiloxane characterized by reacting alinear polysiloxane with a reactive polysiloxane having halogen substitution.

REFERENCES:
W. H. Dickstein et al, Macromolecules, 22, 3886-3888 (1989).
H. Huang et al, Polymer Bulletin, 14, 557-564 (1985).

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