METHOD FOR EMULSION POLYMERIZATION

• Main Authors: INAGAKI TAKEO, NAKAYAMA MITSUKO
• Format: Patent
• Language: English
• Published: 30.03.1982
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

PURPOSE:To prepare a highly stable emulsion giving a water-resistant film and useful as a paint, etc., by polymeizing a vinyl monomer in the presence of a emulsifying agent containing polyoxyalkylene alkylphenyl ether sulfuric acid ester poly- valent metal salt as an essential component. CONSTITUTION:A polymerizable vinyl monomer (e.g. methyl acrylate) is emulsified in an aqueous dispersion medium obtained by dissolving an emulsifying agent containing a polyoxyalkylene alkylphenyl ether sulfuric acid ester poly-valent metal salt (e.g. magnesium salt of poloxy-ethylene octylphenyl ether sulfate) as an essential component in water. A water-soluble radical polymerization initiator such as potassium persulfate is added to the emulsion, and the vinyl monomer is subjected to the emulsion polymerization under heating. After the reaction, the pH of the reaction system is pref. adjusted with aqueous ammonia, etc.