Fluoropolyether group-containing polymer and production method therefor

Patent metadata

Field	Value
Publication number	US-12227616-B2
Application number	US-202017616299-A
Country	US
Kind code	B2
Filing date	May 26, 2020
Priority date	Jun 6, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

The present invention is capable of producing a fluoropolyether group-containing polymer, which is represented by general formula (1)

(in the formula, Rf is a monovalent or divalent fluoropolyether group-containing polymer residue, X is independently a divalent organic group, and α is 1 or 2),
preferably has a number-average molecular weight of 1,000 to 50,000 in terms of polystyrene, and has both a terminal olefin moiety easily converting a functional group and a secondary hydroxyl group having high reactivity, by causing an organometallic reagent having β-hydrogen, specifically, an organometallic reagent having an aliphatic unsaturated double bond (olefin moiety) at a terminal thereof and having β-hydrogen, to act on a fluoropolyether group-containing polymer having a carbonyl group at a terminal thereof.

First claim

The invention claimed is:

1. A fluoropolyether group-containing polymer of the general formula (1) below:

wherein Rf is a monovalent or divalent fluoropolyether group-containing polymer residue, each X is independently a divalent organic group, and α is 1 or 2.

2. The fluoropolyether group-containing polymer of claim 1 , wherein a in the formula (1) is 1 and Rf is a group of the general formula (2) below:

wherein A is a fluorine atom, a hydrogen atom or a monovalent fluorine-containing group terminating in a —CF 3 group, a —CF 2 H group or a —CH 2 F group; Rf H is a fluorooxyalkylene group containing at least one hydrogen atom; d is independently for each unit an integer from 1 to 3; p, q, r, s, t, u and v are each integers from 0 to 200 and the sum p+q+r+s+t+u+v is from 3 to 200; the respective units may be linear or branched; and the respective repeating units shown within parentheses to which p, q, r, s, t, u and v are attached may be randomly bonded.

3. The fluoropolyether group-containing polymer of claim 1 , wherein a in the formula (1) is 2 and Rf is a group of the general formula (3) below:

wherein Rf H is a fluorooxyalkylene group having at least one hydrogen atom; d is independently for each unit an integer from 1 to 3; p, q, r, s, t, u and v are each integers from 0 to 200 and the sum p+q+r+s+t+u+v is from 3 to 200; the respective units may be linear or branched; and the respective repeating units shown within parentheses to which p, q, r, s, t, u and v are attached may be randomly bonded.

4. The fluoropolyether group-containing polymer of claim 1 , wherein X in the formula (1) is an alkylene group of 2 to 12 carbon atoms or an arylene group-containing alkylene group of 8 to 16 carbon atoms.

5. The fluoropolyether group-containing polymer of claim 1 which has a number-average molecular weight of from 1,000 to 50,000 in terms of polystyrene.

6. A method for preparing the fluoropolyether group-containing polymer of claim 1 , comprising a step of reacting a fluoropolyether group-containing polymer of the general formula (4) below:

wherein Rf is a monovalent or divalent fluoropolyether group-containing polymer residue, Y is a removable monovalent group, and α is 1 or 2,
with an organometallic reagent having a β-hydrogen.

7. The method for preparing the fluoropolyether group-containing polymer of claim 6 , wherein the organometallic reagent having a β-hydrogen is a Grignard reagent.

8. The method for preparing the fluoropolyether group-containing polymer of claim 7 , wherein the Grignard reagent is a compound selected from those of the following formulas:

Assignees

• Shinetsu Chemical Co

Inventors

• Sakoh Ryusuke

Classifications

• C08G65/3236

  Fluorine · CPC title

• C08G65/226 Primary

  containing fluorine · CPC title

• C08G65/007 Primary

  containing fluorine · CPC title

• C08G65/331

  containing oxygen {(cyclic ether compounds C08G65/26)} · CPC title

• C08G65/337 Primary

  containing other elements (organic compounds containing halogens only as halides of a carboxyl group C08G65/332) · CPC title