Perfluoropolyether phosphate ester, method for producing the same, and surface treatment agent comprising the same as active ingredient

Patent metadata

Field	Value
Publication number	US-12157752-B2
Application number	US-201916973970-A
Country	US
Kind code	B2
Filing date	May 31, 2019
Priority date	Jun 14, 2018
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A perfluoropolyether phosphate ester represented by the general formula:

[C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 O] 2 PO(OH)

(wherein n is an integer of 1 to 20). This compound is obtained by reacting a perfluoropolyether alcohol represented by the general formula:

C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 OH

(wherein n is an integer of 1 to 20) with phosphorus oxychloride, and hydrolyzing the obtained compound represented by the general formula:

[C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 O] 2 POCl

(wherein n is an integer of 1 to 20). Moreover, the perfluoropolyether phosphate ester or a salt thereof forms a surface treatment agent comprising the perfluoropolyether phosphate ester or a salt thereof as an active ingredient.

First claim

The invention claimed is:

1. A method for producing a perfluoropolyether phosphate ester represented by the general formula:
[C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 O] 2 PO(OH)
wherein n is an integer of 1 to 20,
comprising reacting a perfluoropolyether alcohol represented by the general formula:
C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 OH

wherein n is an integer of 1 to 20,
with phosphorus oxychloride at a molar ratio of 8 to 8.24 based on the perfluoropolyether alcohol in the presence of a calcium chloride dehydrating agent and hydrolyzing the obtained compound represented by the general formula:
[C 3 F 7 O{CF(CF 3 )CF 2 O} n CF(CF 3 )CH 2 O] 2 POCl

wherein n is an integer of 1 to 20.

Assignees

• Unimatec Co Ltd

Inventors

• Urata Kimihiko
• Oda Yuichiro
• Kondo Takuya
• Kaneumi Yoshiyama

Classifications

• C09K3/18

  for application to surfaces to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00) · CPC title

• C07F9/09 Primary

  Esters of phosphoric acids · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• B29C33/60

  Releasing, lubricating or separating agents {(in general C10M)} · CPC title

• C08G65/007 Primary

  containing fluorine · CPC title