Organopolysiloxane-urethane-vinyl graft copolymers

Details Organopolysiloxane-urethane-vinyl graft copolymers Organopolysiloxane-urethane-vinyl graft copolymers

1980-11-14

1982-06-22

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...

525 28, 525404, 525440, 525444, 525446, 525477, C08F28312, C08F28302

Patent

active

043363580

ABSTRACT:
A graft copolymer comprising (I) as a first polymeric moiety an organopolysiloxane with OH functional groups, (II) as a second polymeric moiety a polyester-urethane and, (III) units of vinyl monomers, units of the first and second polymeric moieties being linked via vinyl polymer bridges, all these units having been polymerized in the presence of mixtures of the first and second polymeric moieties, is produced by polymerizing a suitable monomer dispersion. The product is suited for replacing all or some of the organopolysiloxane component in room temperature curable compositions containing organopolysiloxanes, silane cross-linking agents and a curing catalyst.

REFERENCES:
patent: 3008917 (1961-11-01), Park et al.
patent: 3450791 (1969-06-01), Sekmakas et al.
patent: 3531424 (1970-09-01), Swanson
patent: 3579522 (1971-05-01), Bendszus et al.

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