Mitsui Toatsu Chemicals, Incorporated

Kuniyuki Gotoh

Seiichi Masuko

Hiroshi Okada

Takehiko Mogi

In the polymerization of vinyl chloride, the adhesion of the resulting polymer to the walls can be prevented by previously applying a specific chemical to the inner walls of the polymerization tank and parts of the device to be contacted with the monomer during the polymerization. This specific chemical is a copolycondensate obtained by reacting a resol type phenol/formaldehyde precondensate with a nitrogen-containing compound selected from the group consisting of nitrophenols, nitrobenzoic acids, nitrobenzenesulfonic acids, aminophenols, aminobenzoic acids and aminobenzenesulfonic acids.

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Nagoya, Japan

Kuniyuki Gotoh