Modified polymer, composition, coating film and multilayer body

Patent metadata

Field	Value
Publication number	US-12528901-B2
Application number	US-202217696350-A
Country	US
Kind code	B2
Filing date	Mar 16, 2022
Priority date	Sep 17, 2019
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A modified polymer including (a) a main chain containing a fluorine-containing polymer and (b) a side chain represented by the following formula (b1′) and/or a side chain represented by the following formula (b2′). The formula (b1′) is —CH 2 —CR b1 (—X)—C(═O)—Y—Z—Rf, wherein X is a hydrogen atom, a methyl group, or a halogen atom; Y is —O— or —NH—; Z is a direct bond or a divalent organic group; Rf is a C1-C20 fluoroalkyl group; and R b1 is a hydrogen atom or a monovalent organic group. The formula (b2′) is —CH 2 —CR b2 (—R 1 )—C(═O)—O—Si(—CH 3 ) 2 —[O—Si(—CH 3 ) 2 ] n —O—Si(—CH 3 ) 2 —R 2 , wherein R 1 is a hydrogen atom or a methyl group; R 2 is a hydrogen atom or a methyl group; R b2 is a hydrogen atom or a monovalent organic group; and n is 3 to 200.

First claim

What is claimed is:

1 . A modified polymer comprising:
(a) a main chain containing a fluorine-containing polymer, containing a unit represented by —CHR—, wherein R is a hydrogen atom or a monovalent organic group, and containing a polymerized unit based on tetrafluoroethylene or chlorotrifluoroethylene; and (b) a side chain represented by the following formula (b2′), or a side chain represented by the following formula (b1′) and a side chain represented by the following formula (b2′), the formula (b1′) being:
—CH 2 —CR b1 (—X)—C(═O)—Y—Z—Rf  (b1′)

wherein
X is a hydrogen atom, a methyl group, or a halogen atom;
Y is —O— or —NH—;
Z is a direct bond or a divalent organic group;
Rf is a C1-C20 fluoroalkyl group; and
R b1 is a hydrogen atom or a monovalent organic group,
the formula (b2′) being:
—CH 2 —CR b2 (—R 1 )—C(═O)—O—Si(—CH 3 ) 2 —[O—Si(—CH 3 ) 2 ] n —O—Si(—CH 3 ) 2 —R 2    (b2′)

wherein
R 1 is a hydrogen atom or a methyl group;
R 2 is a hydrogen atom or a methyl group;
R b2 is a hydrogen atom or a monovalent organic group; and
n is 3 to 200.

2 . A composition comprising the modified polymer according to claim 1 .

3 . The composition according to claim 2 , further comprising a solvent.

4 . The composition according to claim 2 , further comprising a curing agent.

5 . The composition according to claim 2 ,
wherein the composition is a coating material.

6 . The composition according to claim 2 ,
wherein the composition is a composition for freeze prevention and/or frost prevention.

7 . A coating film obtained by applying the composition according to claim 2 .

8 . The coating film according to claim 7 ,
wherein the coating film has a water contact angle of 95° or greater and a gloss retention of 80% or higher after 3000-hour QUVB testing.

9 . The coating film according to claim 7 ,
wherein the coating film has a water contact angle of 80° or greater after 1000-hour QUVB testing and an oil contact angle of 25° or greater after 1000-hour QUVB testing.

10 . A laminate comprising a substrate and the coating film according to claim 7 .

11 . A coating material, comprising:
the modified polymer according to claim 1 ; and a solvent.

12 . The coating material according claim 11 , wherein the solvent is at least one selected from the group consisting of esters, aliphatic hydrocarbons, alcohols, and cyclic ethers.

13 . The coating material according claim 11 , wherein the fluorine-containing polymer in the main chain further comprises a unit, a vinyl ester unit containing neither a hydroxy group nor an aromatic ring, and/or a hydroxy group-containing monomer unit.

14 . The coating material according claim 11 , wherein the solvent is at least one selected from the group consisting of esters, aliphatic hydrocarbons, alcohols, and cyclic ethers, and
wherein the fluorine-containing polymer in the main chain further comprises a vinyl ester unit containing neither a hydroxy group nor an aromatic ring, and/or a hydroxy group-containing monomer unit.

15 . A modified polymer according to claim 1 , comprising: (b) a side chain represented by the formula (b1′) and a side chain represented by the formula (b2′).

Assignees

• Daikin Fluorochemicals China Co Ltd
• Daikin Ind Ltd

Inventors

• Li Wenbin
• Zeng Xin
• Nakagawa Hideto

Classifications

• C09D151/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09D151/04, C09D151/06 take precedence) · CPC title

• C08F2810/20

  leading to a crosslinking, either explicitly or inherently · CPC title

• C08F8/00

  Chemical modification by after-treatment (graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C) · CPC title

• C08F8/42

  Introducing metal atoms or metal-containing groups · CPC title

• C08F214/267

  with non-fluorinated vinyl ethers · CPC title