FLUORINATED POLYACRYLATE ANTIFOAM COMPONENTS FOR LUBRICATING COMPOSITIONS

Japanese Patent JP2022103389

A

To provide lubricating compositions.SOLUTION: There is disclosed an antifoam component for a mechanical device which includes a fluorinated poly(acrylate) copolymer. The antifoam component has improved foam performance and thermal stability in finished fluids, such as driveline fluids. The disclosed technology provides a lubricating composition including: (a) an oil of lubricating viscosity selected from a group consisting of a Group III oil, a Group IV oil, a Group V oil and mixtures thereof; and b) an antifoam component comprising a poly(acrylate) copolymer including (i) from about 70 wt.% up to about 85 wt.% of an acrylate monomer having C4 to C8 alkyl esters of acrylic acid, (ii) from about 10 wt.% up to about 28 wt.% of an acrylate comonomer having C2 to C3 alkyl esters of acrylic acid, and (iii) from about 1.5 wt.% up to 15.0 wt.% of a fluorinated acrylate monomer, where the antifoam component has Mw of at least 45000 Daltons.SELECTED DRAWING: None

JP6606785	Fullerene derivatives, fluororesin compositions and lubricants
JPH1088166	FOAM STABILIZER FOR LUBRICATING OIL, REFRIGERATING MACHINE OIL AND FLUID FOR OPERATING REFRIGERATING MACHINE
JP2005023965	CARRIER ROLLER FOR VACUUM APPARATUS

DONALD J KNOBLOCH
KEVIN J HUGHES
HOUSTON MICHAEL E
WILLIAM R S BARTON
DENNIS M DISHONG
DAVID M NICKERSON

JP2022082575A

July 07, 2022

May 19, 2022

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LUBRIZOL CORP

C10M147/04; C08F220/22; C10M101/02; C10M105/04; C10M105/32; C10M107/02

Shusaku Yamamoto
Morishita Natsuki

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