Crosslinked polymer

US8012917B2 · kind B2 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• John R. Johnson · Euclid, US
• Daniel C. Visger · Mentor, US
• Marina Baum · Chagrin Falls, US
• Barton J. Schober · Logan, US
• Ying Wang · Shanghai, CN

Key dates

• Filing date: Nov 6, 2007
• Grant date: Sep 6, 2011
• Expiry date: Jun 4, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/25
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a lubricating composition comprising: (a) an oil of lubricating viscosity; and (b) a crosslinked polymer derived from monomers comprising: (i) 0.001 wt % to 7 wt % of a di- or higher functional crosslinking monomer; (ii) 30 wt % or higher of a hydrocarbyl-substituted (meth)acrylic monomer, wherein each hydrocarbyl contains greater than 8 carbon atoms; and (iii) 0 wt % to 40 wt % of a hydrocarbyl-substituted (meth)acrylic monomer, wherein each hydrocarbyl contains 8 or fewer carbon atoms. The invention further provides a method of preparing the crosslinked polymer and its use in a lubricating composition for lubricating an internal combustion engine.