Nippon Oil Company

Other

Sumitomo Wiring Systems, Limited

Nsk Corporation

Nippon Seiko Kabushiki Kaisha

Masaru Mishima

Hirotugu Kinoshita

Makoto Sekiya

Souichi Nomura

Michiharu Naka

Hideki Koizumi

Yasuhiko Onishi

Hirotsugu Kinoshita

Koji Oyama

Yoshinobu Kubo

Yuzo Takahashi

Yukari Kondoh

Mokoto Seikiya

Akihiro Yokono

A grease composition for a constant velocity joint contains a base oil containing 2 to 25 wt. % of a thickener based on total weight of the composition, 0.5 to 20 wt. % of boron nitride powders based on total weight of the composition, and 0.1 to 10 wt. % of an extreme pressure agent based on total weight of the composition selected from the group consisting of molybdenum dithiocarbamate, a sulfur and phosphorus-containing extreme pressure agent, and mixtures thereof. The boron nitride powders have mean particle size of more than 5 .mu.m and not more tha 20 .mu.m.

Grease composition for constant velocity joint

A grease composition for a constant velocity joint involves a base oil containing a thickener and boron nitride powders and optionally an organozinc compound.

Grease composition for constant velocity joint comprising boron nitride

A grease composition for a high-speed rolling bearing contains an alkyl diphenyl ether oil as a base oil, and at least one of diurea compounds represented by the formula (1) ##STR1## wherein R.sup.1 denotes a divalent aromatic hydrocarbon residue having 6 to 15 carbon atoms and R.sup.2 and R.sup.3 may be the same or different and each represent a cyclohexyl group, a cyclohexyl derivative group having 7 to 12 carbon atoms or an alkyl group having 8 to 20 carbon atoms. The diurea compound is contained as a thickener in the base oil. The content in percent of the cyclohexyl group and the cyclohexyl derivative group in the diurea compound is such that a value of [{(numbers of cyclohexyl groups and derivative groups thereof)/(numbers of cyclohexyl groups and derivative groups thereof plus numbers of alkyl groups)}.times.100] is equal to 50 to 100%.

Grease composition containing alkyl diphenyl ether oil and diurea

A grease composition for a constant velocity joint contains a base oil containing 2 to 25 wt.% of a thickener based on total weight of the composition, 0.5 to 20 wt.% of boron nitride powders based on total weight of the composition, and 0.1 to 10 wt.% of an extreme pressure agent based on total weight of the composition selected from the group consisting of molybdenum dithiocarbamate, a sulfur and phosphorus-containing extreme pressure agent, and mixtures thereof. The sulfur and phosphorus-containing extreme pressure agent consists of a sulfur-containing compound and a phosphorus-containing compound. The sulfur-containing compound is selected from the group consisting of a sulfide of fats and oils, a polysulfide, and mixtures thereof. The phosphorus-containing compound is selected from the group consisting of a phosphate, a phosphite, and mixtures thereof.

This invention relates to a filling grease composition for automobile wire harness connector which comprises a petroleum oil having an initial boiling point of 400.degree. C. or more and a gelling agent having the general formula: ##STR1## wherein R is a divalent aromatic group represented by a member: ##STR2## as essential components, and the content of said gelling agent ranging from 5 to 50% by weight on the basis of the whole composition.

Filling grease composition for automobile wire harness connector

A diurea grease composition contains a base oil and 2 to 25 wt.%, based on the total weight of the composition, of a diurea compound, the diurea grease compound being produced by reacting a mixed system of two or more different diisocyanates represented by the formula (I) OCN--R--NCO wherein R stands for a straight-chained or branched alkylene group, a straight-chained or branched alkenylene group, a cycloalkylene group or an aromatic group, with an amine compound selected from the group consisting of a primary amine represented by the formula (II) R.sub.1 --NH.sub.2 wherein R.sub.1 stands for a hydrocarbon residue having 6 to 20 carbon atoms, a secondary amine represented by the formula (III) ##STR1## wherein R.sub.2 and R.sub.3 each stand for hydrocarbon residues having 6 to 20 carbon atoms, and mixtures thereof.

Diurea grease composition

A grease composition for a high speed anti-friction bearing contains, in a synthetic lubricant base oil, (A) 2 to 30 wt. % of a thickening agent consisting of an urea comopund, (B) 0.2 to 30 wt. % of sorbitan monooleate, (C) 0.2 to 3.0 wt.% of barium sulfonate, and (D) 0.2 to 3.0 wt. % of barium lanolate, as indispensable components, each weight percentage being based on the total weight of the composition.

Grease composition for high speed anti-friction bearing

A grease composition comprises a base oil selected from the group consisting of mineral lubricant base oils, synthetic lubricant base oils and mixtures thereof, (A) 2 to 25 wt %, based on the total weight of the composition, of a thickener selected from the group consisting of urea compounds, urea-urethane compounds, urethane compounds and mixtures thereof and (B) 0.2 to 5.0 wt. %, based on the total weight of the composition, of an ingredient selected from the group consisting of oxidized paraffins, diphenylhydrogen phosphite, hexamethyl phosphoric triamide and mixtures thereof.

Grease composition containing urea, urea-urethane, or urethane thickeners

A urea-urethane grease composition contains, as essential ingredients, a thickener and a lubricant base oil. The thickener contains a urea-urethane mixture having a composition including 20 to 99, mol. % of a diurea compound represented by the general formula (I) of ##STR1## 4 to 30 mol. % of a urea-urethane compound represented by the general formula (II) of ##STR2## and 1 to 50 mol. % of a diurethane compound represented by the general formula (III) of ##STR3## wherein R.sub.1 represents a difunctional aromatic hydrocarbon residue having 6 to 15 carbon atoms, R.sub.2 a cyclohexyl group or a group derived from cyclohexyl and having 7 to 12 carbon atoms and R.sub.3 an alkyl group or an alkenyl group having 8 to 20 carbon atoms. The ratio of the numbers of amino groups R.sub.2 --NH-- to those of alkoxy groups R.sub.3 --O-- in the mixture being 95/5 to 40/60. The thickener is contained in an amount of 2 to 25 wt. % based on the total weight of the grease composition.

Urea-urethane grease composition

A dilurea grease composition contains a lubricant base oil and a thickener. The thickener essentially consists of a mixture of at least two diurea compounds each being represented by the following general formula (I) of: ##STR1## wherein R.sub.1 is a difunctional aromatic hydrocarbon residue, and A and B each stands for an amino group represented by the general formula (II) of R.sub.2 --NH--(where R.sub.2 stands for a cyclohexyl group, a group derived from cyclohexyl or an alkyl group) or an amino group represented by the general formula (III) of ##STR2## (where R.sub.3 R.sub.4 each stands for cyclohexyl group or a group derived from cyclohexyl). The ratio in percentage of the numbers of the amino groups (III) to the total numbers of the amino groups (III) plus the amino groups (II) ranges from 1 to 50%. The ratio of the numbers of the amino groups (II) wherein R.sub.2 is a cyclohexyl group or a group derived from the cyclohexyl to the numbers of the amino groups (II) wherein R.sub.2 is an alkyl group ranges from 174 to 4/1.

Growing community of inventors

Kawasaki, Japan

Masaru Mishima