Optically clear filled silicone elastomers

Details Optically clear filled silicone elastomers Optically clear filled silicone elastomers

Filed on

1975-04-29

Date issued

1976-12-07

Examiner

Jacobs, Lewis T.

Patent Class

Chemistry of carbon compounds

SubClass

Miscellaneous organic carbon compounds

Other Related Categories

C08L 8304

Type

Patent

Status

active

Patent number

039961877

Description

ABSTRACT:
Reinforced silicone elastomers, having improved tensile strength and particularly tear strength, include at least copolymers of aryl siloxanes and alkyl siloxanes, in a particular ratio of aryl to alkyl substituents, having reflective indices matched to the index of refraction of a silicone filler, forming optically clear material, useful for soft contact lenses.

REFERENCES:
patent: 3341490 (1967-09-01), Burdick et al.
patent: 3457214 (1969-07-01), Modic
patent: 3518324 (1970-06-01), Polmanteer
patent: 3607972 (1971-09-01), Kiles et al.
patent: 3624023 (1971-11-01), Hartlage

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