PURPOSE: To obtain the subject composition excellent in storage stability by incorporating an alkali (alkaline earth) metal compound, transition metal compound and/or an alcohol in the reactional system during and/or after synthesizing an emulsion polymer bearing specific silyl group.
CONSTITUTION: (A) Emulsion polymerization is carried out between a vinyl monomer bearing silyl group of the formula (R1 is 1-10C alkyl, aryl or aralkyl; X is halogen, alkoxy, OH, etc.; (a) is the number of R1 bound to Si; (3-a) is the number of X bound to Si; (a) is an integer of 0-2) and another vinyl monomer copolymerizable with the former vinyl monomer using a (non)ionic surfactant in water pref. in the presence a redox catalyst at ≤60°C and at a pH5-8 (pref. 6-7). During and/or after the synthesis, (B) B1: an alkali metal compound, alkaline earth metal compound or transition metal compound (pref. potassium acetate) and/or B2: an alcohol (pref. methanol) is (are) added to the system, thus obtaining the objective composition.
HATANO TAKANORI
ANDOU NAOTAMI
