| abstract |
[MEANS FOR SOLVING PROBLEMS] In addition to emulsification stability, maintain low-temperature film-forming properties of emulsion, low-temperature adhesiveness and transparency of dry film, and add hydrophilic organic solvent and ionic additives to make mechanical The object is to obtain an emulsion that does not aggregate or increase in viscosity even when subjected to shearing. A structural unit derived from an anionic monomer having a (meth) acryloyl group and a hydrophilic group is contained as a copolymerization component in an amount of 5 to 40 mol%, and an alkylaminoalkyl (meth) acrylate is a main component. 5 to 30 mol% of a structural unit derived from a cationic monomer as a copolymerization component, and 1 to 20 mol% of a structural unit derived from a nonionic monomer having a specific structure as a copolymerization component A polymer emulsifier is used which contains and has a 1/2 method temperature of 40 ° C. or more and 140 ° C. or less by a flow tester of the copolymer. [Selection figure] None |