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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11326122 B1

PDFFull Text
Date of Patent:
May. 10, 2022

Filed:

Mar. 21, 2019

Fluorinated polyacrylates antifoams in ultra-low viscosity (<5 cst) finished fluids

Applicant:

The Lubrizol Corporation, Wickliffe, OH (US);

Inventors:

Sujith Perera, Twinsburg, OH (US);

Kevin J. Hughes, Sammamish, WA (US);

Elizabeth A. Schiferl, St. Paul, MN (US);

David M. Nickerson, Concord Township, OH (US);

Alonzo Smith, Bedford, OH (US);

Assignee:

The Lubrizol Corporation, Wickliffe, OH (US);

Attorneys:

Iken Sans

Teresan Gilbert

Elizabeth A Barks

Primary Examiner:

Ellen M McAvoy

Int. Cl.
CPC ...
C10M 147/04 (2006.01); C10M 169/04 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 30/06 (2006.01); C10N 30/18 (2006.01); C10N 40/04 (2006.01); C10N 40/08 (2006.01); C10N 40/25 (2006.01);
U.S. Cl.
CPC ...
C10M 147/04 (2013.01); C10M 169/041 (2013.01); C10M 2209/084 (2013.01); C10M 2213/04 (2013.01); C10M 2223/049 (2013.01); C10M 2229/02 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01); C10N 2030/06 (2013.01); C10N 2030/18 (2013.01); C10N 2040/04 (2013.01); C10N 2040/08 (2013.01); C10N 2040/25 (2013.01);
Abstract

There is disclosed an antifoam component for a mechanical device which includes a poly(acrylate) copolymer. The antifoam component has improved foam performance in finished fluids utilizing dibutyl hydrogen phosphite compounds, such as driveline fluids. A lubricating composition comprising a) at least one oil of lubricating viscosity; and b) an antifoam component comprising a poly(acrylate) copolymer. The poly(acrylate) copolymer, b) may include (i) from about 30 wt % up to about 99 wt % of a (meth)acrylate monomer having Cto Calkyl esters of (meth)acrylic acid; and (ii) from about 1 wt % up to about 70 wt % of a fluorinated (meth)acrylate monomer.

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