PURPOSE: To obtain an emulsion resin having good chemical stability and mechanical stability and useful for paints, by a method wherein a polymerizable amino acid cpd. and another polymerizable monomer are polymerized in an aq. medium without using any surfactants by two-pack dropping method.
CONSTITUTION: At least one polymerizable amino acid cpd of formula I (wherein R1, R2, R3, R4 are H, CH3 C2H5; R5 is 1W20C alkyl gp. which may have -SO-, -COO-, -O-linkage in the chain; R6 is 1W12C alkylene gp. which may be substituted with OH, SH or phenylene gp. which may be substituted with 1W4e alkyl; A is COOH, SO3H) or formula II (wherein R8, R9, R10 are H, 1W6C alkyl; R11 is alkyl which may have -SO-, -COO-, -O-linkage in the chain) and another polymerizable monomer are polymerized in an aq. medium by two-pack dropping method to obtain an emulsion resin having a viscosity of 10W50000cps (at 25°C), a glass transition point of -60W+100°C and 2W65wt% of nonvolatile matter.
MIZUGUCHI RYUZO (JP)
ISHIKURA SHINICHI (JP)
ISHII KEIZO (JP)
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