Process for making silicone containing hydrogel lenses

Details Process for making silicone containing hydrogel lenses Process for making silicone containing hydrogel lenses

1992-08-03

1993-11-09

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Rotational molding

264 26, 264 27, B29D 1100

Patent

active

052600009

ABSTRACT:
A process for preparing silicone hydrogel contact lenses where machining operations are employed to produce a lens having a desired final shape. The silicone hydrogel contact lenses are prepared by:
providing a monomeric mixture comprising a silicone-containing monomer, a hydrophilic monomer and an organic diluent;
charging the mixture to a mold and curing the formulation in the mold to obtain a shaped article;
removing organic diluent from the shaped article to improve machineability of the article; and
machining the shaped article to obtain a contact lens having a desired configuration.

REFERENCES:
patent: 3361858 (1968-01-01), Wichterle
patent: 3408429 (1968-10-01), Wichterle
patent: 3496254 (1970-02-01), Wichterle
patent: 3660545 (1972-05-01), Wichterle
patent: 3699089 (1972-10-01), Wichterle
patent: 4113224 (1978-09-01), Clark et al.
patent: 4136250 (1979-01-01), Mueller et al.
patent: 4153641 (1979-05-01), Deichert et al.
patent: 4197266 (1980-04-01), Clark et al.
patent: 4347198 (1982-08-01), Ohkada et al.
patent: 4495313 (1985-01-01), Larsen
patent: 4555372 (1985-11-01), Kunzler et al.
patent: 4568501 (1986-02-01), Wichterle
patent: 4680336 (1987-07-01), Larsen et al.
patent: 4740533 (1988-04-01), Su et al.
patent: 4889664 (1989-12-01), Kindt-Larsen et al.
patent: 4910277 (1990-03-01), Bambury et al.
patent: 5034461 (1991-07-01), Lai et al.
patent: 5070215 (1991-12-01), Bambury et al.
patent: 5077335 (1991-12-01), Schwabe et al.

Affiliated with

Also associated with

Rating

Process for making silicone containing hydrogel lenses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making silicone containing hydrogel lenses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making silicone containing hydrogel lenses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1140776