UV-absorbing extended-wear Lenses

Details UV-absorbing extended-wear Lenses UV-absorbing extended-wear Lenses

1988-09-30

1992-01-28

Page, Thurman K.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526246, 526247, 526261, 526279, 523106, C08F 1820, C08F 3008

Patent

active

050845373

ABSTRACT:
There are provided extended-wear lenses formed by polymerizing an organosilicon monomer, a fluoroorgano monomer, a hydrophilic monomer, and a crosslinking agent. The product includes a benzotriazole and/or a benzophenone UV-absorbing agent and is is easily machinable to any prescription, permitting continuous wear, with oxygen permeability in excess of 50.times.50.sup.-11 (cm.sup.2 /sec)(ml O.sub.2 .times.mm Hg) and a receding contact angle of less than 45.degree. C. The bulk of the monomer content is the fluoorgano monomer and/or organosilicon monomer, which content is limited to 35 parts by weight, with lesser amounts being preferred.

REFERENCES:
patent: 4304895 (1981-12-01), Loshaek
patent: 4433125 (1984-02-01), Ichinohe et al.
patent: 4525563 (1985-06-01), Shibata et al.
patent: 4602074 (1986-07-01), Mizutoni et al.
patent: 4625007 (1986-11-01), Ellis et al.
patent: 4780515 (1988-10-01), Deichert

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