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US 10,941,368 B2Granted
Lubricating oil composition comprising dispersant comb polymers
AssigneeEvonik Operations GmbH
InventorsTsuyoshi Yuki, Yasuo Arai, Tomohiro Matsuda, Nobuhiro Kishida
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Abstract
Selected comb polymers contain specified amounts of macromonomer and nitrogen-containing (meth)acrylates. Lubricant compositions can contain such comb polymers. The selected comb polymers can be used as solubilizers in lubricant compositions, especially in engine oil (EO) compositions.
Claims20
A polyalkyl(meth)acrylate based comb polymer, consisting of the following monomers in polymerized form:
- (a) 10% to 20% by weight of an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0% to 1% by weight of methyl methacrylate;
- (c) 60% to 75% by weight of n-butyl methacrylate;
- (d) 10% to 20% by weight of C10-15 alkyl methacrylates;
- (e) 0% to 1% by weight of at least one styrene monomer;
- and
- (f) 0.5% to 3% by weight of at least one nitrogen-containing (meth)acrylate selected from the group consisting of aminoalkyl (meth)acrylates, aminoalkyl (meth)acrylamides, and mixtures thereof.
4 more elements
An additive composition, comprising:
- (A) 60% to 80% by weight of a base oil;
- and
- (B) 20% to 40% by weight of a polyalkyl(meth)acrylate based comb polymer, consisting of the following monomers in polymerized form:
- (a) 10% to 20% by weight of an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0% to 1% by weight of methyl methacrylate;
- (c) 60% to 75% by weight of n-butyl methacrylate;
- (d) 10% to 20% by weight of C10-15 alkyl methacrylates;
- (e) 0% to 1% by weight of at least one styrene monomer;
- and
- (f) 0.5% to 3% by weight of at least one nitrogen-containing (meth)acrylate selected from the group consisting of aminoalkyl (meth)acrylates, aminoalkyl(meth)acrylamides and mixtures thereof.
7 more elements
A lubricating oil composition, comprising:
- (A) 85% to 99% by weight of a base oil;
- (B) 0.5% to 10% by weight of a polyalkyl(meth)acrylate based comb polymer, consisting of the following monomers in polymerized form:
- (a) 10% to 20% by weight of an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0% to 1% by weight of methyl methacrylate;
- (c) 60% to 75% by weight of n-butyl methacrylate;
- (d) 10% to 20% by weight of C10-15 alkyl methacrylates;
- (e) 0% to 1% by weight of at least one styrene monomer;
- and
- (f) 0.5% to 3% by weight of at least one nitrogen-containing (meth)acrylate selected from the group consisting of aminoalkyl (meth)acrylates, aminoalkyl(meth)acrylamides, and mixtures thereof;
- (C) 0.5% to 5% by weight of molybdenum-containing friction modifier delivering 0.05 to 0.5% by weight of molybdenum;
- and
- (D) optionally, one or more further additives.
9 more elements
Dependencies are inferred from the claim text.