Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1997-02-14
1998-05-26
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526314, C08F 1824, C08F 200
Patent
active
057566186
ABSTRACT:
The present invention relates to a polyol(allyl carbonate) based casting composition suitable for forming high quality ophthalmic lenses which contains an epoxy compound in an amount effective to reduce shrinkage during its final polymerization in a mold. The casting composition of the present invention comprising polyol(allyl carbonate) and epoxy compound contains an initiator for the polymerization of the polyol(allyl carbonate), but does not contain a catalyst for polymerization of the epoxy compound. The invention also relates to a method for reducing the shrinkage of casting compositions comprising
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Dixon Kenneth
Kelly Mary Ann
Akzo Nobel nv
Cheng Wu C.
Mancini Ralph
Morris Louis A.
Schofer Joseph L.
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