Contact lenses and materials and methods of making same

Details Contact lenses and materials and methods of making same Contact lenses and materials and methods of making same

1995-06-06

1996-05-21

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523107, 525309, 525903, 526245, 526279, 5263232, 351160H, 264 11, 264 27, C08F26706, C08F27900

Patent

active

055190693

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.
patent: 5087392 (1992-02-01), Burke et al.
Legge, et al., Thermoplastic Elastomers, Hansen Publications, pp. 49-50 (1984).
Sperling, Introduction to Physical Polymer Science, J. Wiley & Sons (1986), pp. 346-349.

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