Nippon Paint Compnay, Ltd.

Keizo Ishii

Ryuzo Mizuguchi

Shinichi Ishikura

Hisaichi Muramoto

Tamotsu Yoshioka

Shin-ichi Ishikura

Masanori Oiwa

Hidetsumu Okada

Polymer microparticles having immobilized therein a water-insoluble substance such as oil-soluble dyes or pigments are produced by a method which includes the steps of forming droplets of a solution of a self-emulsifiable resin in a nonaqueous solvent containing the water-insoluble substance and an ethylenically unsaturated monomer suspended in an aqueous medium, and then allowing the monomer in the droplets to polymerize in situ.

Production of polymer microparticles having water-insoluble chemicals

An aqueous emulsion comprising a polymeric resin prepared by polymerizing (a) at least one amino acid of either one of the formula: ##STR1## and the formula: ##STR2## with (b) at least one other polymerizable monomer in an aqueous medium, the component (a) and at least a portion of the component (b) being introduced separately into the reaction system.

Polymeric resin, and its production and use

An alkyd resin containing ampho-ionic groups of the formula: ##STR1## wherein A is a C.sub.1 -C.sub.6 alkylene or a phenylene group, is disclosed. Said resin is prepared by reacting a polyol, a polybasic acid and an ampho-ionic compound of the formula: ##STR2## wherein A is as defined above, R.sub.1 is a hydroxyalkyl, R.sub.2 and R.sub.3 are H or alkyl optionally containing sulfo and/or hydroxyl group.

Ampho-ionic group-containing alkyd resins

Growing community of inventors

Ashiya, Japan

Keizo Ishii