Abstract: An acrylic resin emulsion which comprises an aqueous medium and particles of an acrylic resin emulsified and dispersed therein by the use of the emulsifier comprising as an essential component a polyester comprising in the molecule an amino-sulfonic acid type amphoionic group of the formula: ##STR1## wherein A is a straight or branched C.sub.1 -C.sub.6 alkylene group, a phenylene group or a substituted phenylene group.

Abstract: An aqueous coating composition for formation of a coating film having high corrosion-resistance on a metal substrate which comprises (a) a film-forming polymeric material having at least one hydroxyl group and/or at least one carboxyl group, (b) a zwitter-ion compound and (c) an aminoplast resin and/or an epoxy resin with or without (d) a surface active agent having a hydrophilic functional group and at least one hydroxyl group and/or at least one carboxyl group.

Abstract: A coating composition comprising as a main component a polymeric resin obtained by solution polymerization of at least one of polymerizable amino acid compounds of either one of the formulas: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each hydrogen, methyl or ethyl, R.sub.5 is hydrogen or C.sub.1 -C.sub.20 alkyl optionally having --SO--, --COO-- or --O-- therein, R.sub.6 is C.sub.1 -C.sub.12 alkylene optionally substituted with --OH, --SH or --SR.sub.7 (R.sub.7 being C.sub.1 -C.sub.4 alkyl) and/or optionally substituted with C.sub.1 -C.sub.4 alkyl or phenylene optionally substituted with C.sub.1 -C.sub.4 alkyl and A is --COOH or --SO.sub.3 H, and ##STR2## wherein R.sub.8, R.sub.9 and R.sub.10 are each hydrogen or C.sub.1 -C.sub.6 alkyl, R.sub.11 is hydrogen or C.sub.1 -C.sub.20 alkyl optionally having --SO--, --COO-- or --O-- therein, or a group of the formula: ##STR3## (R.sub.8, R.sub.9 and R.sub.10 being each as defined above), R.sub.12 is C.sub.2 -C.sub.

Abstract: A process for preparing a substantially lump free acrylic resin emulsion by emulsion polymerization of one or more acrylic monomers in water in the presence or absence of an emulsifier or a dispersing agent, wherein the polymerization is carried out in the presence a water-insoluble resin which is immiscible with the acrylic resin in the emulsion and has a softening or melting point of 20.degree. C. or higher.

Abstract: Ampho-ionic compounds of the formula ##STR1## wherein, for example, R is CH.sub.2 .dbd.C(CH.sub.3)--COOCH.sub.2 --, R.sub.2 is hydrogen and B.sup..sym. is --N.sup..sym. --(CH.sub.3).sub.2 C.sub.12 H.sub.25, are prepared by reacting an oxirane compound with sulfur dioxide and a tertiary amine. These ampho-ionic compounds are useful as, for example, surfactants.

Abstract: A thermosetting resin of self cross-linking type which is prepared by polymerization of at least one polymerizable monomer having an ampho-ion structure, at least one polymerizable monomer containing an oxirane group and at least one other monomer and can afford a hardened film or article of good physical properties when cross-linked.

Abstract: A thermosetting coating composition which comprises an aqueous resin dispersion obtained by polymerization of a polymerizable monomer having an ampho-ionic structure with any other polymerizable monomer being copolymerizable therewith and an amino plast resin, and which can afford a hardened coating film having an excellent durability at a relatively low temperature within a short period of time.