Back to results
US 10,358,619 B2Granted
Hydroxy functionalized ashless additive
AssigneeThe Lubrizol Corporation
InventorYanshi Zhang
Life of this patent
Estimating the term…
Abstract
The disclosed technology relates to hydroxy functionalized ashless additives useful in engine oil compositions due to their ability to reduce deposits, particularly deposits seen in turbocharged direct injection (TDI) engines. The described additives include ashless saturated compounds having a long chain hydrocarbyl polymer terminated by a hydroxyl group. The disclosed technology also relates to lubricant compositions containing the described additives, processes of making the described additives, and methods of using the described additives.
Claims10
A lubricant composition comprising:
- (i) an oil of lubricating viscosity;
- (ii) 0.9 to 4% of an ashless saturated compound having a long chain polyisobutylene polymer, wherein said polyisobutylene polymer:
- (a) is terminated by a hydroxyl group;
- (b) has a number average molecular weight of from about 300 to about 3000;
- and
- (c) has a vinylidene content of at least 70 percent by weight.
3 more elements
Dependencies are inferred from the claim text.