Patent · US Expired

Motor oil with high dispersivity and good wear protection characteristics

US6475964B1 · kind B1 · utility

3Cited by

8References

5Claims

0Family size

Assignee

ROEHM GMBH & CO. KG · DE

Inventors

Peter Neudoerfl · Darmstadt, DE
Horst Pennewiss · Darmstadt, DE
Gerhard Renner · Deggendorf, DE

Key dates

Filing date	Aug 2, 1995
Grant date	Nov 5, 2002
Priority date	—
Expiry date	Aug 2, 2015

Classification

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

Abstract

Motor oils and transmission oils of the usual commercial SAE single- and multiple viscosity classes, which oils contain polymeric additives and which have high dispersivity and good wear protection characteristics, said oils containing the following additives:(i) at least one heavy-duty (HD) additive, which contains phosphorus compounds; and(ii) as dispersive polymeric components PC, cooligomers copolymers, or combinations thereof comprised of:(a) units of C6-24 alkyl (meth)acrylates,(b) units of at least one functionalized alkyl (meth)acrylate,(c) units of one or more C1-5-alkyl (meth)acrylate monomers, and(d) units of 1-alkenes, with the following provisions:(1) the units of formulas I and II together comprise 100 wt. %,(2) the content of polymer components) PC in the additive-containing mineral oils is in the range 0.5-50 wt. %, and(3) the content of phosphorus in the additive-containing mineral oils is less than or equal to 0.08 wt. %.

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