PROCESS FOR PREPARING WATER-SOLUBLE STYRENE/ACRYLIC RESINS BY CONTINUOUS BULK POLYMERIZATION

摘要

A bulk polymerization process for preparing water-soluble styrene/acrylic resins, in which styrene and acryl monomers are polymerized in a solvent mixture of dipropylene glycol methyl ether and water in a temperature-controllable reactor equipped externally with an oil jacket containing a cooling coil therein and the resulting polymers are deprived of volatile contents in a falling-strand type devolatilizer. The water-soluble styrene/acrylic resins take industrial advantages over conventional resins because the resins, if polymerized at lower temperatures, show lower molecular weights, narrower molecular weight distributions, higher acid values and lower volatile content.