Lubricant composition having improved non-Newtonian viscometrics

US9598658B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Eugene Scanlon · Mamaroneck, US
• Kevin J. DeSantis · Valley Cottage, US
• Virginie Bette · Mannheim, DE
• Jochen Petzoldt · Mannheim, DE

Key dates

• Filing date: Mar 23, 2012
• Grant date: Mar 21, 2017
• Expiry date: Sep 27, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A lubricant composition having improved non-Newtonian viscometrics includes at least 85 weight percent of a base oil and 1 to 15 weight percent of a lubricant additive. The additive itself includes 10 to 80 weight percent of a diluent oil and 30 to 80 weight percent of a random co-polymeric viscosity index improver. The viscosity index improver is the free-radical polymerization product of at least 5 to 15 weight percent methyl methacrylate and 5 to 95 weight percent of a C8-C10 alkyl (meth)acrylate. The additive is formed using a method that includes the step of providing the diluent oil, the methyl methacrylate, the C8-C10 alkyl (meth)acrylate, and a free-radical initiator. The method also includes the steps of flowing the diluent oil into a reactor, flowing the methyl methacrylate and the C8-C10 alkyl (meth)acrylate into the reactor independently from the free-radical initiator, and flowing the free-radical initiator into the reactor.