Toyo Soda Manufacturing Co., Ltd.

Tetsuo Iikuni

Hideaki Nakazawa

Yujiro Kosaka

Naobumi Fukushi

Mitsumasa Akashi

Junichi Soshizaki

A process for producing cationic synthetic rubber latexes by the emulsion polymerization of a conjugated diene or a conjugated diene and a comonomer copolymerizable with the conjugated diene, wherein the polymerization is carried out in the presence of a cationic emulsifier consisting of one or more organic or inorganic acid salts of a .beta.-hydroxy- or .beta.-hydroxymethyl-alkylpolyamine of the general formulae: ##STR1## wherein X is a hydroxyl or hydroxymethyl group, R.sub.1 is a hydrogen atom or an alkyl group of 1 to 20 carbon atoms, R.sub.2 is a hydrogen atom or an alkyl group of 1 to 20 carbon atoms, R.sub.1 + R.sub.2 together contain 8 to 20 carbon atoms, and n is an integer of 1 to 3, an ethylene oxide and/or propylene oxide adduct thereof, or an organic or inorganic acid salt of such an adduct, or a mixture thereof, and in the presence of colloidal alumina.

Process for producing cationic latexes

A latex-asphalt emulsion composition comprising a cationic latex prepared by the emulsion-polymerization of a diene in the presence of an emulsifier of an inorganic or organic acid salt of an N-alkylpropylene diaminepolyglycol ether having the formula ##EQU1## wherein R represents a C.sub.12.sub.-20 saturated or unsaturated aliphatic hydrocarbon radical; x, y and z represent 0 or an integer such that 0 &lt; x + y + z .ltoreq. 3; and n represents the integers 2 or 3; and further comprises an alumina sol, asphalt or an asphalt emulsion.

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Yokohama, Japan

Tetsuo Iikuni