Patent ID: 7834095
Filing Date: 2010-11-16
Classification: C08K,C08L

Abstract:
1. A process for preparing a polystyrene blend comprising: admixing styrene and a polymer selected from the group consisting of syndiotactic polypropylene, ethylene propylene impact copolymer and mixtures thereof to form a solution, and then polymerizing the styrene monomer in the presence of a free radical catalyst to form the polystyrene blend comprising from about 80 wt. % to about 95 wt. % polystyrene, wherein the catalyst is a peroxide catalysts selected from the group consisting of 1,1-di-(t-butylperoxy)cyclohexane, 1,1-di-(t-amylperoxy)cyclohexane, 1,1-di-(t-butylperoxy)-3,3,5-trimethyl-cyclohexane, OO-t-amyl-O-(2-ethylbexyl monoperoxy-carbonate, OO-t-butyl O-isopropyl monoperoxy-carbonate, OO-t-butyl-O-(2-ethylhexyl)monoperoxy-carbonate, N-butyl-4,4-di(t-butylperoxy)valerate, ethyl 3,3-Di-(t-butylperoxy)butyrate) and mixtures thereof.