Patent ID: 6506864
Filing Date: 2003-01-14
Classification: C08F

Abstract:
A polymerizable composition comprising:(a) a first allyl functional monomer having at least two allyl groups, said first allyl functional monomer being selected such that a substantially completely cured polymerizate of said first allyl functional monomer has a 15 second Barcol 934 hardness of at least 40; and (b) a second allyl functional monomer, which is different from said first allyl functional monomer and is selected from, (i) polyether diol bis(allyl carbonate); (ii) polylactone diol bis(allyl carbonate); and (iii) mixtures of (i) and (ii), wherein said second allyl functional monomer (b) is present in said polymerizable composition in an amount to provide a substantially completely cured polymerizate of said composition having improved organic photochromic substance incorporation relative to a substantially completely cured polymerizate of said composition free of (b), and heat distortion temperature of at least 40Â° C.