PROCESS FOR THE PREPARATION OF LIQUID AND POLYMERIZABLE COMPOSITIONS CONTAINING OLIGOMERIC ALILO CARBONATE SUITABLE FOR THE PRODUCTION OF ORGANIC GLASSES PROVIDED WITH HIGH ABRASION RESISTANCE

摘要

Liq. compsns. polymerisable to organic glasses with high abrasion strength contain (i) 20-80, esp. 35-70wt.% oligomeric prods. with 2 terminal allyl gps. (Component A) of formula (I) CH2=CHCH2OCOO(CH2CH2OCH2 CH2OCOO)nCH2CH=CH2 (I) where n = 2-5; (ii) 20-50, esp. 25-45,wt.% monomer prod. (Component B) of formula (II). R = Me, Et, -CH2-OCOOCH2CH=CH2; n = 0, 1; R1 = -CH2OCOOCH2CH=CH2; (iii) 0-35, esp. 0-25,wt.% of reactive diluent contg. allyl, vinyl or methacrylic gps. Pref. component A is the transesterification prod. of diallyl carbonate and diethylene glycol in a mutual molar ratio of about 2:1. Component B is the transalkylation prod. of diallyl carbonate (DAC) and an aliphatic polyol with at least 4 alcoholic OH gps. in a 4:1 molar ratio of DAC:OH gps. of the polyol. Component C may be diethylene glycol bis(allylcarbonate), vinyl acetate or methyl methacrylate. The compsn. may contain 1-6 pts. wt. of a free radical initiator per 100 pts. wt. of (A+B+C). Pref. the polyol is di-trimethylolpropane, pentaerythritol, di-pentaerythritol or tri-pentaerythritol.