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US 11,072,677 B2Granted
Comb polymers comprising imide functionality
AssigneeEvonik Operations GmbH
InventorsKatrin Schöller, Jennifer Holtzinger, Fabian Ziegler, Klaus Schimossek, Frank Lauterwasser
Life of this patent
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Abstract
Selected comb polymers include specified amounts of macromonomer and imide functionalization. Further, a method is useful for the preparation of such comb polymers. Lubricant compositions including such comb polymers are useful for reducing wear and fuel consumption of lubricant compositions, especially of engine oil (EO) compositions.
Claims19
A grafted polyalkyl(meth)acrylate based comb polymer consisting of a base polymer A and units B which are grafted thereon, wherein the base polymer A comprises:
- (a) 10% to 25% by weight of at least one repeating unit derived from an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0% to 2% by weight of at least one repeating unit derived from methyl (meth)acrylate;
- (c) 60% to 80% by weight of at least one repeating unit derived from butyl (meth)acrylate;
- (d) 0% to 16% by weight of at least one repeating unit derived from C10-20-alkyl (meth)acrylate;
- and
- (e) 0% to 2% by weight of at least one repeating unit derived from a styrene monomer having 8 to 17 carbon atoms,
- wherein an amount of each component (a) to (e) is based on a total composition of the grafted polyalkyl(meth)acrylate based comb polymer;
- wherein the units B comprise at least one repeating unit prepared from:
- (f) 1% to 2.5% by weight of at least one repeating unit derived from polar unsaturated monomer selected from the group consisting of maleic acid, maleic acid anhydride, methyl maleic acid anhydride, maleic acid monoester and maleic acid diester;
- and
- (g) 2% to 5% by weight of at least one repeating unit derived from a primary amine of general formula (I)
- wherein each R′ is independently selected from the group consisting of H and an alkyl radical having 1 to 9 carbon atoms, and
- wherein the amount of each component (f) and (g) is based on the total composition of the grafted polyalkyl(meth)acrylate based comb polymer.
10 more elements
An additive composition, comprising:
- (A) a first base oil selected from the group consisting of API Group III oils and mixtures thereof;
- (B) a second base oil selected from the group consisting of API Group V base oils and mixtures thereof;
- and
- (C) a polyalkyl(meth)acrylate based comb polymer consisting of a base polymer A and units B which is grafted thereon, wherein the base polymer A comprises:
- (a) 10% to 25% by weight of at least one repeating unit derived from an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene:
- (b) 0% to 2% by weight of at least one repeating unit derived from methyl (meth)acrylate:
- (c) 60% to 80% by weight of at least one repeating unit derived from butyl (meth)acrylate;
- (d) 0% to 16% by weight of at least one repeating unit derived from C10-20-alkyl (meth)acrylate;
- and
- (e) 0% to 2% by weight of at least one repeating unit derived from a styrene monomer having 8 to 17 carbon atoms,
- wherein an amount of each component (a) to (e) is based on a total composition of the polyalkyl(meth)acrylate based comb polymer;
- and
- wherein the units B comprise at least one repeating unit prepared from:
- (f) 1% to 2.5% by weight of at least one repeating unit derived from a polar unsaturated monomer selected from the group consisting of maleic acid, maleic acid anhydride, methyl maleic acid anhydride, maleic acid monoester and maleic acid diester;
- and
- (g) 2% to 5% by weight of at least one repeating unit derived from a primary amine of general formula (I)
- wherein each R′ is independently selected from the group consisting of H and an alkyl radical having 1 to 9 carbon atoms, and
- wherein the amount of each component (f) and (g) is based on the total composition of the polyalkyl(meth)acrylate based comb polymer.
15 more elements
A lubricating oil composition, comprising:
- (A) 60% to 99% by weight of a first base oil selected from the group consisting of API Group I, API Group II, API Group III, API Group IV oils and mixtures thereof;
- (B) 0.25% to 15% by weight of a second base oil selected from the group consisting of API Group V base oils and mixtures thereof;
- and
- (C) 0.5% to 10% by weight of a polyalkyl(meth)acrylate based comb polymer consisting of a base polymer A and units B which are grafted thereon, wherein the base polymer A comprises:
- (a) 10% to 25% by weight of at least one repeating unit derived from an ester of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene:
- (b) 0% to 2% by weight of at least one repeating unit derived from methyl (meth)acrylate;
- (c) 60% to 80% by weight of at least one repeating unit derived from butyl (meth)acrylate;
- (d) 0% to 16% by weight of at least one repeating unit derived from at least one C10-20-alkyl (meth)acrylate;
- and
- (e) 0% to 2% by weight of at least one repeating unit derived from at least one styrene monomer having 8 to 17 carbon atoms,
- wherein an amount of each component (a) to (e) is based on a total composition of the polyalkyl(meth)acrylate based comb polymer;
- wherein the units B comprise at least one repeating unit prepared from:
- (f) 1% to 2.5% by weight of at least one repeating unit derived from a polar unsaturated monomer selected from the group consisting of maleic acid, maleic acid anhydride, methyl maleic acid anhydride, maleic acid monoester and maleic acid diester;
- and
- (g) 2% to 5% by weight of at least one repeating nit derived from a primary amine of general formula (I)
- wherein each R′ is independently selected from the group consisting of H and an alkyl radical having 1 to 9 carbon atoms, wherein the amount of each component (f) and (g) is based on the total composition of the polyalkyl(meth)acrylate based comb polymer;
- and
- (D) 0% to 15% by weight of one or more further additives.
15 more elements
Dependencies are inferred from the claim text.