Process for preparing organopolysiloxanes and copolymers thereof

Details Process for preparing organopolysiloxanes and copolymers thereof Process for preparing organopolysiloxanes and copolymers thereof

1981-12-18

1983-11-01

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...

525474, 528 10, 528 14, 528 20, 528 21, 528 22, 528 25, 528 26, 528 27, 528 33, 528 34, 528 38, 528 42, 523107, 351160R, C08F28300

Patent

active

044131046

ABSTRACT:
A process for preparing organopolysiloxanes having SiC-bonded organofunctional groups, which comprises reacting an organopolysiloxane containing SiC-bonded hydroxyl and/or alkoxy groups and having an average of about 0.85 to 1.8 SiC-bonded monovalent hydrocarbon radicals or halogenated monovalent hydrocarbon radicals for each Si atom, with an organosilicon compound containing alkoxy groups and/or siloxane oxygen groups and at least one SiC-bonded organofunctional radical per molecule in the presence of an organic solvent and a basic catalyst.
The resultant organopolysiloxanes having SiC-bonded organofunctional groups may, for example, be used for preparing modified polymers by copolymerizing the organopolysiloxanes with a monomer containing an aliphatic double bond, such as styrene or hydroxyethyl methacrylate, or by reacting the organopolysiloxanes with an additional polymer such as an epoxy resin. When a monomer, containing an aliphatic double bond is used in the copolymerization, the resultant modified polymers may be used to manufacture hard contact lenses.

REFERENCES:
patent: 3127363 (1964-03-01), Nitzsche et al.
patent: 3847848 (1974-11-01), Beers
patent: 3890269 (1975-06-01), Martin
patent: 4075169 (1978-02-01), Razzano
patent: 4122247 (1978-10-01), Evans
patent: 4229548 (1980-10-01), Sattlegger

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