Polysiloxane composition

Details Polysiloxane composition Polysiloxane composition

1978-12-28

1981-01-13

Hayes, Lorenzo B.

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

Synthetic resins

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

260 37SB, 351160R, C08L 8304

Patent

active

042450691

ABSTRACT:
A composition which is hydrophobic but possesses excellent wettability comprising copolymers and terpolymers of a polysiloxane and esters of acrylic and methacrylic acids. These compositions are suitable for use as ocular membranes worn in contact with the eye which possess excellent oxygen permeability, light transmission, wettability, mucophobicity, and lipophobicity and which can be worn for extremely long periods of time and then disposed of.
A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membrances are recovered by the destruction of said molds and without secondary operations.
The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for extended periods.

REFERENCES:
patent: 2560498 (1951-07-01), Warrick
patent: 2823218 (1958-02-01), Speier et al.
patent: 2970150 (1961-01-01), Bailey
patent: 2976576 (1961-03-01), Wichterle et al.
patent: 3228741 (1966-01-01), Becker
patent: 4136250 (1979-01-01), Mueller et al.
patent: 4182723 (1980-01-01), Covington

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