Method and composition for incorporating radiation-absorbing age

Details Method and composition for incorporating radiation-absorbing age Method and composition for incorporating radiation-absorbing age

1999-12-22

2000-12-19

Szekely, Peter A.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

8507, 8509, 8549, 524 91, 524501, 524503, 525 57, 525937, C08L 2904, C09B 6200, G02C 704, D06P 358

Patent

active

061628441

ABSTRACT:
A method of incorporating radiation-absorbing agents (i.e., dyes) into polymeric materials. A preferred method involves crosslinking or polymerizing a polymerizable or crosslinkable material in the presence of a polymeric dye. A preferred product is a tinted contact lens comprising poly(vinyl alcohol). The methods offer advantages in reduced fabrication cycles, reduced extractables, elimination of post-polymerization activation steps, elimination of post-polymerization extraction steps and reduced scrap and costs associated with lens handling.

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