Method of molding shaped polymeric articles
AssigneeBausch & Lomb Incorporated
InventorYu-Chin Lai
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Abstract
When molding shaped articles such as contact lenses from monomeric mixtures containing silicone monomers and hydrophilic monomers, the wettability of the resulting article is improved by using a mold material produced from a resin comprising a copolymer of an alpha, beta, olefinically saturated mononitrile and at least one comonomer to enhance melt processability.
Claims18
An improved method of making shaped articles by copolymerizing at least one silicone-containing monomer and at least one hydrophilic monomer in a mold, the improvement which comprises using a mold produced from a resin comprising a copolymer of an alpha, beta, olefinically unsaturated mononitrile and at least one comonomer to enhance melt processability, wherein said resin is stable in the presence of the unpolymerized monomers used in making said shaped articles.
Dependencies are inferred from the claim text.