Silicone-organic block polymers and method for making

Details Silicone-organic block polymers and method for making Silicone-organic block polymers and method for making

1986-03-17

1987-06-30

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

528 25, 528 26, 528 32, C08F28312

Patent

active

046771697

ABSTRACT:
A method is provided for making silicone-organic block polymers, such as polydimethylsiloxane-polystyrene block polymers resulting from the thermal generation of free-radicals in the presence of free-radical polymerizable organic monomer. A silicone prepolymer is used having chemically combined pinacolate groups in the backbone or terminal positions which are capable of generating free-radicals upon thermolysis and which retain chemically combined remnants of such pinacolate diradicals which serve as connecting sites for free-radical polymerized organic blocks.

REFERENCES:
patent: 3776875 (1973-12-01), Getson
patent: 4254248 (1981-03-01), Friends et al.
patent: 4535174 (1985-08-01), Crivello
patent: 4584356 (1986-04-01), Crivello
Multiple-Sequence Block Polymers of Poly(styrene) and Poly(dimethylsilorane), Polymer Letters, vol. 8, pp. 677-679 (1970) John Wiley & Sons, Inc.
Noshay and McGrath, Block Copolymers, Academic Press, New York, N.Y. (1977) pp. 275-284.

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