Method of mold contact lenses

Details Method of mold contact lenses Method of mold contact lenses

1990-03-07

1992-02-11

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Reshaping or treatment of an optical preform

264 11, 264 26, B29D 1100

Patent

active

050873920

ABSTRACT:
An interpenetrating network copolymer, method of producing same, and method of producing optical lens blanks and finished lenses therefrom. The method broadly involves the preparation of first and second mixtures of polymerizable vinyl monomers and interrupting the polymerization of the first mixture at a relative viscosity of from about 1.05 to about 10 by admixing the partially polymerized first mixture with the second mixture to create a casting solution and thereafter, when desired, polymerizing molded casting solution in heat to create a solid lens material.

REFERENCES:
patent: 4661573 (1987-04-01), Ratkowski et al.

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