Process for producing high-quality vinyl chloride polymers using a perester or percarbonate and 1-cyclohexyl-1-methylethyl peroxyneodecanoate

摘要

A process for producing a vinyl chloride polymer comprises subjecting a vinyl chloride monomer or a mixture comprising a major proportion of a vinyl chloride monomer along with at least one co- polymerizable monomer to suspension polymerization in an aqueous medium in the presence of a monomer-soluble polymerization initiator. The monomer-soluble polymerization initiator comprises, in combination, (A) a compound which is free of a benzene ring, a cyclohexyl group and an alkoxy group in the molecule and whose 10 hours half-life temperature at a concentration of 0. 1 mole/liter of benzene is in the range of 30° to 50° C. and (B) 1-cyclohexyl-1-methylethyl peroxyneodecanoate.