Cross-linked hydrophilic polymers

Details Cross-linked hydrophilic polymers Cross-linked hydrophilic polymers

1980-12-18

1982-11-30

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

523108, C08F 2610

Patent

active

043616895

ABSTRACT:
Cross-linked hydrophilic polymers, useful inter alia for the manufacture of contact lenses capable of absorbing water to a water content of 63 to 90% by weight while retaining excellent tensile strength contain hydrophilic units of N-vinyl-2-pyrrolidone, with optionally other hydrophilic monomers in minor amount, hydrophobic units of cycloalkyl acrylate, methacrylate or itaconate, and optionally other hydrophobic monomers, and units of a cross-linking agent. They may be made by polymerizing the monomers in the presence of a free radical generating catalyst. The polymer may then be shaped and hydrated.

REFERENCES:
patent: 4158089 (1979-06-01), Loshaek
patent: 4182822 (1980-01-01), Chang

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