Ocular lens material

Details Ocular lens material Ocular lens material

1994-07-12

1996-08-06

Cain, Edward J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523106, 528353, 623 6, H01H 900

Patent

active

055434428

ABSTRACT:
A transparent ocular lens material comprising a condensation polymer prepared by the condensation polymerization of a monomer mixture comprising (A) an aromatic tetracarboxylic acid dianhydride and (B) at least one diamino compound selected from (a) a silicon-containing diamine, (b) a diamino-substituted benzene and (c) a diamino-substituted diphenyl. The ocular lens material is excellent in transparency, having high oxygen permeability and moreover, excellent in heat resistance, ultraviolet-ray absorbing property and forming and processing property. Therefore, the ocular lens material can be suitably used in contact lenses, intraocular lenses, and the like.

REFERENCES:
patent: 4681585 (1987-07-01), Sayano et al.
patent: 4880895 (1989-11-01), Higashi et al.
patent: 4955900 (1990-09-01), Higashi et al.
patent: 5041133 (1991-08-01), Sayano et al.
patent: 5049156 (1991-09-01), Higashi et al.
patent: 5093453 (1992-03-01), St. Clair et al.
patent: 5260352 (1993-11-01), Kawakami
Database WPI, Derwent Publications Ltd., London, GB; AN 91-061339 & JP-A-3 009 747, 01/1991, Abstract.
Databse WPI, Derwent Publications Ltd., London, GB; AN 87-112126 & JP-A-62 057 421, 03/1987, Abstract.

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