Patent ID: 6423803
Filing Date: 2002-07-23
Classification: C08F,C08L

Abstract:
A polymerizable composition comprising:(a) a radically polymerizable monomer represented by the following general formula, Râ€”[â€”Oâ€”C(O)â€”Oâ€”R1]i â€ƒwherein R is a polyvalent residue of a polyol having at least two hydroxy groups, R1 is an allyl group, and i is a whole number from 2 to 4; and (b) an additive represented by the following general formula, R2â€”O&Parenopenst;R3O&Parenclosest;x&Parenopenst;R4O&Parenclosest;y&Parenopenst;R5O&Parenclosest;zR6 â€ƒwherein R2 and R6 are each selected independently from hydrogen, C1-C20 linear or branched alkyl, cycloalkyl having from 5 to 7 carbon atoms in the cyclic ring, aryl, C2-C20 linear or branched alkanoyl, cycloalkanoyl having from 5 to 7 carbon atoms in the cyclic ring and aroyl, R2 and R6 each being free of radically polymerizable ethylenically unsaturated groups; R3O and R5O are the same or different; R4O is different than each of R3O and R5O; R3O, R4O and R5O are each independently a divalent residue of an epoxide; x and z are each independently a number from 0 to 200, provided that the sum of x and z is greater than zero; and y is a number from 3 to 200; said additive (b) being present in said composition in an amount at least sufficient such that a polymerizate of said composition is substantially free of tinting defects.