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Title:
VISCOSITY INDEX IMPROVER, REFRIGERATOR OIL, AND WORKING FLUID COMPOSITION FOR REFRIGERATORS
Document Type and Number:
WIPO Patent Application WO/2022/270342
Kind Code:
A1
Abstract:
The present invention relates to: a viscosity index improver which contains a copolymer (A) that contains, as essential constituent monomers, a monomer (a) represented by general formula (1) and having a fluorine atom and a monomer (b) represented by general formula (2), wherein the solubility parameter of the copolymer (A) is 8.1 to 10.0 (cal/cm3)1/2, and the ratio (b/a) of the mass of the monomer (b) to the mass of the monomer (a) in the monomers constituting the copolymer (A) is 0.01 to 42; and the like. [In general formula (1), R1 represents a hydrogen atom or a methyl group; R2 represents an alkylene group having 2 to 4 carbon atoms; p represents an integer of 0 or 1; q represents an integer of 0 to 20, and in cases where q is 2 or more, the R2 moieties may be the same as or different from each other; and Y represent a monovalent group that is obtained by substituting some or all of hydrogen atoms in a hydrocarbon group having 1 to 40 carbon atoms by fluorine atoms.] [In general formula (2), R3 represents a hydrogen atom or a methyl group; -X1- represents a group represented by -O- or -NH-; R4 represents an alkylene group having 2 to 4 carbon atoms; r represents an integer of 0 or 1; s represents an integer of 0 to 20, and in cases where s is 2 or more, the R4 moieties may be the same as or different from each other; and R5 represents a hydrocarbon group having 1 to 40 carbon atoms.]

Inventors:
OGATA KAZUKI (JP)
SUGIYAMA YOSHIMITSU (JP)
TORII NAOHIRO (JP)
GOTO SATOSHI (JP)
MIZUTANI YUYA (JP)
OGATA HIDETOSHI (JP)
SEKI YUMA (JP)
NAKAJIMA TATSUKI (JP)
Application Number:
PCT/JP2022/023716
Publication Date:
December 29, 2022
Filing Date:
June 14, 2022
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD (JP)
ENEOS CORP (JP)
International Classes:
C08F220/04; C09K3/00; C09K5/04; C10M105/38; C10M107/24; C10M107/34; C10M147/04
Domestic Patent References:
WO2019111752A12019-06-13
Foreign References:
JP2012188520A2012-10-04
JP2006096809A2006-04-13
JP2019529687A2019-10-17
JP2020105295A2020-07-09
JPH09302370A1997-11-25
JP2019158233A2019-09-19
JP2017057278A2017-03-23
JP6925323B22021-08-25
JP6826987B22021-02-10
JP6793127B22020-12-02
JP2017197662A2017-11-02
JPH01245005A1989-09-29
JP5755469B22015-07-29
Other References:
POLYMER ENGINEERING AND SCIENCE, vol. 14, no. 2, February 1974 (1974-02-01), pages 147 - 154
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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