Mixtures of polyacrylate resins and siloxane-styrene copolymers

Details Mixtures of polyacrylate resins and siloxane-styrene copolymers Mixtures of polyacrylate resins and siloxane-styrene copolymers

1983-01-13

1985-10-29

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 63, 525100, 525209, 523107, C08L 3308, C08L 3310, C08L 5300

Patent

active

045501394

ABSTRACT:
Optically clear lenses, particularly contact lenses, may be prepared from an alloy of a polyacrylate resin and a siloxane-styrene copolymer, the alloy having an oxygen permeability greater than the polyacrylate resin. Preferably the polyacrylate is polymethylmethacrylate or methylacrylate-ethylacrylate copolymer, and the siloxane-styrene copolymer is preferably a polydimethylsiloxane-alpha-methylstyrene block copolymer. The alloy composition may be produced by melt mixing, preferably by polymerizing acrylate monomers in the presence of siloxane-styrene copolymer.

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Mandel, Robert B., "Corneal Physiology and Permeable Materials", Contact Lense Manufacturers Association, (1981).
Refojo, Miguel F., "Current Status of Biomaterials in Ophthalmology", Survey of Ophthalmology, vol. 26, No. 5, pp. 257-265 (Mar., Apr., 1982).
Arkles, Barry C., "New-Generation Silicones for Medical Devices", Medical Device & Diagnostic Industry, vol. 3, No. 4, Apr. 1981, Canon Communications, Inc.
"POLYCON" Lense Advertisement.

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