Patent · US Expired

Method for improving low-temperature fluidity of lubricating oils using high-and-low-molecular weight polymer

US6458749B2 · kind B2 · utility

7Cited by

8References

9Claims

0Family size

Assignee

RohMax Additives GmbH · DE

Inventors

Bernard Kinker · Kintnersville, US
Thomas A. Mc Gregor · Trevose, US
Joan Souchik · Northampton, US

Key dates

Filing date	Jul 9, 2001
Grant date	Oct 1, 2002
Priority date	—
Expiry date	Jul 9, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/28
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method for improving the low temperature fluidity of lubricating oil compositions based on addition to lubricating oils of a mixture of selected high molecular weight and low molecular weight alkyl (meth)acrylate copolymers is disclosed. Combinations of low molecular weight alkyl (meth)acrylate polymers containing zero to 25 weight percent (C16-C24)alkyl (meth)acrylate with high molecular weight alkyl (meth)acrylate polymers containing 25 to 70 weight percent (C16-C24)alkyl (meth)acrylate are especially effective at satisfying different aspects of low temperature fluidity properties simultaneously for a broad range of base oils.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.