Lubricating oil composition comprising a polyalkylene oxide additive
AssigneeDai-Ichi Kogyo Seiyaku Co., Ltd.
InventorsShigeo Mori, Chuzo Isoda, Satoshi Teshima
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Abstract
Properties of paraffinic or naphthenic mineral oil lubricants may be improved by admixing therewith a polyalkylene oxide compound having a C.sub.2 -C.sub.4 alkylene oxide moiety and a C.sub.6 -C.sub.40 alkylene oxide moiety.
Claims8
A lubricating oil composition consisting essentially of a paraffinic or naphthenic mineral oil or a mixture of both types of mineral oils, and 5 to 60% by weight of the composition of a polyalkylene oxide compound of the formula:
- R--C.sub.n H.sub.2n O.sub.x --C.sub.m H.sub.2m O.sub.y --H].sub.Z
- wherein
- R is the residue of a compound having 1-8 active hydrogen atoms with removal of the active hydrogen atoms,
- n is 3-4,
- m is 6-40,
- x and y are an integer, and
- Z is 1-8;
- said polyalkylene oxide compound having a molecular weight of 500 to 100,000 and a C.sub.6 -C.sub.40 alkylene oxide content of 15 to 60% by weight of the entire molecule.
A lubricating oil composition consisting essentially of a paraffinic or naphthenic mineral oil or a mixture of both types of mineral oils, and 10 to 60% by weight of the composition of a polyalkylene oxide compound of the formula:
- R--[(C.sub.n H.sub.2n O).sub.x --(C.sub.m H.sub.2m O).sub.y --H].sub.Z
- wherein
- R is the residue of an aliphatic monoalcohol, a glycol, a polyol, an amine, a phenol or a carboxylic acid having 1-8 active hydrogen atoms with removal of the active hydrogen atoms,
- n is 3-4,
- m is 6-40,
- x and y are an integer, and
- z is 1-8;
- said polyalkylene oxide compound having a molecular weight of 500 to 100,000 and a C.sub.6 -C.sub.40 alkylene oxide content of 20 to 50% by weight of the entire molecule.
Dependencies are inferred from the claim text.