Process for producing cationic latexes

In a process for producing cationic latexes by the emulsion polymerization of a conjugated diene or a conjugated diene plus less than 50% by weight of the total monomer weight of a comonomer copolymerizable with the conjugated diene, the improvement wherein the polymerization is carried out in the presence of a cationic emulsifier comprising:

• at least one member selected from the group consisting of
• a. an organic or inorganic acid or salt as of .beta.-hydroxyalkylpolyamine or a .beta.-hydroxymethylalkylpolyamine of the general formula:
• ##STR3## in which X stands for a hydroxyl or hydroxymethyl group, R.sub.1 stands for a hydrogen atom or an alkyl group of 1 to 20 carbon atoms, R.sub.2 stands for a hydrogen atom or an alkyl group of 1 to 20 carbon atoms, the total sum of the carbon atoms of R.sub.1 + R.sub.2 is 8 to 20, and n stands for an integer of 1 to 3;
• b. an ethylene oxide adduct, a propylene oxide adduct or an ethylene oxide/propylene oxide adduct of .beta.-hydroxyalkylpolyamine or .beta.-hydroxymethylalkylpolyamine;
• and
• c. an organic or inorganic acid salt of said oxide adducts;
• and in the presence of colloidal alumina.