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US 2026/0297236 A1Published application
Polyalkyl (meth)acrylate-based polymers with improved low temperature properties
AssigneeEvonik Operations GmbH
InventorsJens Christian Markwart, Boris Eisenberg, Manfred Braum, Dieter Janßen, Stefan Hilf
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Abstract
Polyalkyl(meth)acrylate-based polymers have defined amounts of long-chain alkyl (meth)acrylates. The preparation of such polyalkyl(meth)acrylate-based polymers leads to lubricant compositions that find application in the improvement of the thickening efficiency and low temperature performance of lubricant compositions.
Claims13
A polyalkyl(meth)acrylate-based polymer, consisting of the following monomers:
- (a) 6 wt. % to 12 wt. % of one or more esters of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0 wt. % to 1 wt. % of methyl methacrylate;
- (c) 45 wt. % to 70 wt. % of n-butyl methacrylate;
- (d) 0 wt. % to 20 wt. % of one or more C5-11 alkyl methacrylates;
- (e) 0.2 wt. % to 18 wt. % of one or more C12-15 alkyl methacrylates;
- (f) 2 wt. % to 19.8 wt. % of one or more C16-20 alkyl methacrylates;
- and
- (g) 0 wt. % to 1 wt. % of one or more styrene monomers,
- wherein a sum of components (e) and (f) is equal to or less than 20 wt. %.
6 more elements
An additive composition, comprising:
- (A) 60 wt. % to 80 wt. % of a base oil, and
- (B) 20 wt. % to 40 wt. % of a polyalkyl(meth)acrylate-based polymer, consisting of the following monomers:
- (a) 6 wt. % to 12 wt. % of one or more esters of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0 wt. % to 1 wt. % of methyl methacrylate;
- (c) 45 wt. % to 70 wt. % of n-butyl methacrylate;
- (d) 0 wt. % to 20 wt. % of one or more C5-11 alkyl methacrylates;
- (e) 0.2 wt. % to 18 wt. % of one or more C12-15 alkyl methacrylates;
- (f) 2 wt. % to 19.8 wt. % of one or more C16-20 alkyl methacrylates;
- and
- (g) 0 wt. % to 1 wt. % of one or more styrene monomers,
- wherein a sum of components (e) and (f) is equal to or less than 20 wt. %.
8 more elements
A lubricating oil composition, comprising:
- (A) 75 to 99.5% by weight of a base oil;
- (B) 0.5 to 10% by weight of a polyalkyl(meth)acrylate-based polymer, comprising:
- (a) 6 wt. % to 12 wt. % of one or more esters of (meth)acrylic acid and a hydroxylated hydrogenated polybutadiene;
- (b) 0 wt. % to 1 wt. % of methyl methacrylate;
- (c) 45 wt. % to 70 wt. % of n-butyl methacrylate;
- (d) 0 wt. % to 20 wt. % of one or more C5-11 alkyl methacrylates;
- (e) 0.2 wt. % to 18 wt. % of one or more C12-15 alkyl methacrylates;
- (f) 2 wt. % to 19.8 wt. % of one or more C16-20 alkyl methacrylates;
- and
- (g) 0 wt. % to 1 wt. % of one or more styrene monomers
- wherein a sum of components (e) and (f) is equal to or less than 20 wt. %, and
- (C) 0 to 15% by weight of one or more further additives.
9 more elements
Dependencies are inferred from the claim text.