Rigid contact lenses with improved oxygen permeability

Details Rigid contact lenses with improved oxygen permeability Rigid contact lenses with improved oxygen permeability

1991-01-09

1993-03-16

Schofer, Joseph L.

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

Synthetic resins

From silicon reactant having at least one...

528 26, C08G 7704

Patent

active

051945568

ABSTRACT:
Hard polymers with extremely high oxygen permeability are described, which consist of the copolymerization product of 1-15% by weight of a poly(dimethylsiloxane) bearing multiple polymerizable vinyl groups and having a number-average molecular weight M.sub.n of 1000-7000, 20-50% of an oligosiloxanylalkyl (meth)acrylate, 25-50% of an at least three fluorine atoms containing vinyl-monomer, 0-30% of copolymerizable monomers, which by themselves as homo- or copolymers have a Shore-D hardness of at least 85, 1-25% of polyvinyl-crosslinking monomer of 200-1000 molecular weight, and 0-15% of a watersoluble, copolymerizable monomer. The novel polymers combine a Shore-D hardness of 70-85 with an oxygen permeability of 40-90 barrers, making them outstanding materials for the manufacture and use as rigid, gas-permeable contact lenses.

REFERENCES:
patent: 3808178 (1974-04-01), Gaylord
patent: 4130708 (1978-12-01), Friedlander et al.
patent: 4136250 (1979-01-01), Mueller et al.
patent: 4189546 (1980-02-01), Deichert et al.
patent: 4208362 (1980-01-01), Deichert et al.
patent: 4275184 (1981-06-01), Bargain et al.
patent: 4276402 (1981-06-01), Chromecek et al.
patent: 4387206 (1983-06-01), Bayer et al.
patent: 4486577 (1984-12-01), Mueller et al.
patent: 4605712 (1986-08-01), Mueller et al.
patent: 4734475 (1988-03-01), Goldenberg et al.
patent: 4740533 (1988-04-01), Su et al.
patent: 4837289 (1989-06-01), Mueller et al.
patent: 4923906 (1990-05-01), Mueller et al.
Chem. Abst. 100, 211286u.
Derwent Abst. of U.S. Pat. No. 2,718,516.
Derwent Abst. 70-84518R/45.

Affiliated with

Also associated with

Rating

Rigid contact lenses with improved oxygen permeability does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rigid contact lenses with improved oxygen permeability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rigid contact lenses with improved oxygen permeability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-351376