Process for preparing methacrylate polymer

摘要

PCT No. PCT/JP86/00400 Sec. 371 Date Apr. 6, 1987 Sec. 102(e) Date Apr. 6, 1987 PCT Filed Aug. 4, 1986 PCT Pub. No. WO87/00842 PCT Pub. Date Feb. 12, 1987.A polymerization can be carried out rapidly by polymerizing a methacrylate ester or a mixture of unsaturated monomers comprising the methacrylate ester as a main component in the presence of (1) a hydroperoxide polymerization initiator, (2) a reductant containing sulfur in a molecule, (3) a hydrogen halogenide salt of amine or a quarternary halogenide and (4) a copper-containing compound.