Kao Corporation

Kawasaki Steel Corporation

Takeshi Yoshimoto

Hideo Abe

Kazuhito Kenmochi

Hiroyuki Nagamori

Toru Sasaki

Hiroyuki Matsuda

Koichi Ito

A cold-rolling lube oil for metallic materials is composed of (a) 40-90 wt. % of a monoester of a specific aliphatic carboxylic acid and a particular aliphatic alcohol, (b) 0.5-10 wt. % of at least one of dimer acids and polymer acids of certain unsaturated higher fatty acids, (c) 10-25 wt. % of a fats and fatty oils, or 5-70 wt. % of an ester obtained by reacting remaining carboxyl or hydroxyl groups of a specific polyester with a specific alcohol or fatty acid, (d) 0.3-10 wt. % of a phenol-type antioxidant, and (e) 0.3-10 wt. % of a sulfur-type antioxidant.

Cold-rolling lube oil for metallic materials

Novel cold rolling oils for steels comprise (A) 40 to 90 wt % of a monoester of an aliphatic carboxylic acid having 12 to 22 carbon atoms and an aliphatic alcohol having 1 to 12 carbon atoms, (B) 0.5 to 10 wt % of at least one of a dimer acid and a polymerized acid of a higher aliphatic unsaturated acid having 16 to 20 carbon atoms, (C) 2 to 40 wt % of a polyester having a molecular weight of 750 to 7500 and obtained by subjecting at least one of a dimer acid and a polymerized acid of a higher aliphatic unsaturated acid having 16 to 20 carbon atoms to condensation with a polyol under heating conditions and reacting remaining carboxyl groups of hydroxyl groups of the resulting polyester with an alcohol having 1 to 22 carbon atoms or an aliphatic acid having 12 to 22 carbon atoms, or 10 to 25 wt % of fat and fatty oils, and (D) 0.1 to 10 wt % of a polymer compound having nitrogen atoms in a molecule having a molecular weight of 1,000 to 1,000,000 such as a homopolymer or copolymer of monomers of the following general formula: ##STR1## in which R.sub.1 represents H or CH.sub.3, R.sub.2 and R.sub.3 independently represent H or an alkyl group having 1 to 3 carbon atoms. The cold rolling oils for steels have good lubricity, surface cleanability with excellent heat resistance and oxidative stability.

Cold rolling oil for steels

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Chiba, Japan

Takeshi Yoshimoto