Unsaturated polysiloxanes and polymers thereof

Details Unsaturated polysiloxanes and polymers thereof Unsaturated polysiloxanes and polymers thereof

1984-09-24

1986-08-12

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...

525100, 525101, 525479, 526279, 351160R, 351160H, 528 26, 528 28, 528 29, 528 24, 528 32, C08F28300

Patent

active

046057129

ABSTRACT:
Polysiloxanes of uniform molecular weight (MW) distribution with 500-10,000 MW segments of polysiloxane and containing at least one vinyl group connected to said polysiloxane segments through intervening alkylene-urea or -urethane linkages are prepared from polysiloxane-polyols, -polyamines or -polythiols by reaction with an unsaturated compound containing an isocyanato moiety, for example 2-isocyanatoethyl methacrylate. The polysiloxanes containing the vinyl groups are useful as radiation- or thermally curable coatings for glass, textiles, plastics, wood, ceramics, metals, as films or bandages for medicinal purposes, or molded shapes, in form of contact lenses, catheters or implants, either by themselves or in combination with other vinyl monomers; and are particularly useful in preparing hard or soft contact lenses, including hydrogel contact lenses.

REFERENCES:
patent: 2718516 (1955-09-01), Bortnick
patent: 4130708 (1978-12-01), Friedlander et al.
patent: 4136250 (1979-01-01), Mueller et al.
patent: 4233425 (1980-11-01), Tefertiller et al.
patent: 4320221 (1982-03-01), Hoffman
patent: 4486577 (1984-12-01), Mueller et al.

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