Dispersing agent for emulsion polymerization

Abstract

Abstract PURPOSE:To provide the titled dispersing agent composed of a copolymer of isobutylene, maleic acid ( or its anhydride) and styrenesulfonic acid salt and capable of improving the dispersibility of monomer and giving stable emulsion when applied to the emulsion when applied to the emulsion polymerization of a vinyl monomer. CONSTITUTION:A copolymer of isobutylene, maleic acid (or its anhydride) and styrene is produced e.g. by reacting 1mol of isobutylene, 0.5-5mol of maleic acid or its anhydride and 0.01-5mol of styrene optionally in a solvent such as nitromethane in the presence of a catalyst such as benzyl peroxide, preferably at 45-150 deg.C for 1-10hr. The copolymer is sulfonated and converted to a sulfonic acid salt to obtain the objective copolymer of isobutylene, maleic acid (or its anhydride) and styrenesulfonic acid salt useful as a dispersing agent. USE:Useful in the field for producing a vinyl polymer useful as a raw material of paper and wood-processing agent, adhesive, etc.

Inventors

• 👤 Hidetoshi Shimada
• 👤 英俊 島田

Bibliographic Details