Unsaturated urea polysiloxanes

Details Unsaturated urea polysiloxanes Unsaturated urea polysiloxanes

1994-06-09

1996-01-02

Dean, Ralph H.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 25, 528 26, 528 28, C08F28312

Patent

active

054809460

ABSTRACT:
New styrene-functional polysiloxanes are described which are obtained by reaction of aminoalkyl functional polysiloxanes with styrene isocyanates. The styrene functional urea polysiloxanes have improved hydrolytic stability and are useful, either by themselves or in combination with copolymerizable comonomers, in UV- or heat curable biocompatible and oxygen permeable coatings, films or shaped articles, especially in form of oxygen permeable contact lenses.

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