REDUCTION OF DISCOLOURATION OF AROMATIC PEROXIDE INITIATED POLYOL ALLYL CARBONATE

摘要

A solid polymeric composition comprising a polymerizate of a polyol (allyl carbonate), fragments of aromatic peroxide initiator, and an effective amount of a 2-hydroxy-4-alkoxy benzophenone. A method of polymerizing a polyol (allyl carbonate) monomer comprising: a) forming a composition comprising polyol (allyl carbonate) monomer and aromatic peroxide initiator; and b) initiating polymerization; characterized in that the composition initially contains up to 0.01 mole of original aromatic peroxide initiator per equivalent of polyol (allyl carbonate) monomer and an effective amount of a 2- hydroxy-4-alkoxy benzophenone. A method of reducing ultraviolet induced yellowing of aromatic peroxide initiated poly [polyol (allyl carbonate)] comprising: a) maintaining the level of original aromatic peroxide initiator up to about 0.01 mole per equivalent of polyol (allyl carbonate) monomer; and b) providing an effective amount of a 2-hydroxy-4-alkoxy benzophenone in the polyol (allyl carbonate) monomer. A method of reducing yellowing of aromatic peroxide initiated poly [polyol (allyl carbonate) comprising: a) maintaining the level of original aromatic peroxide initiator up to 0.01 mole per equivalent of polyol (allyl carbonate) monomer and providing an effective amount of a 2-hydroxy-4-alkoxy benzophenone; b) polymerizing the polyol (allyl carbonate) to form a solid polymerizate; and c) continuing the polymerization above 100 degrees Centigrade and low enough to avoid thermal degradation induced yellowness.