Patent ID: 6821458
Filing Date: 2004-11-23
Classification: A61L,C08F,C08L,G02B

Abstract:
A method of forming an optical lens, the method comprising the steps of:a) mixing together an optically clear dead polymer, a reactive plasticizer in an amount to render the composition semi-solid and malleable, and an initiator to form a semi-solid polymerizable composition, wherein the dead polymer and the reactive plasticizer exhibit compatibility at temperatures not higher than 100Â° C., and wherein the polymerizable composition remains optically clear and exhibits low shrinkage when polymerized; b) shaping the semi-solid composition into a desired geometry; and c) exposing the semi-solid composition to a source of polymerizing energy; to give the resultant optically clear lens comprising a crosslinked polymer network of reactive plasticizer within an entangled dead polymer.