Fluorinated polymer, method for producing it, and article having cured product of fluorinated polymer

Patent metadata

Field	Value
Publication number	US-10875940-B2
Application number	US-201916267407-A
Country	US
Kind code	B2
Filing date	Feb 5, 2019
Priority date	Aug 29, 2016
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

To provide a fluorinated polymer which can be heat-cured at low temperature (from room temperature to 150° C.).
A fluorinated polymer containing units represented by the following formula (1):

wherein X 1 and X 2 are each independently a hydrogen atom or a fluorine atom,
Q 1 is a single bond or an etheric oxygen atom, R f1 is a fluoroalkylene group or a fluoroalkylene group having at least 2 carbon atoms and having an etheric oxygen atom between carbon atoms, Z 1 is NR 1 —Y 1 , O—Y 2 or S—Y 3 , R 1 is a hydrogen atom, an alkyl group or an aryl group, and Y 1 , Y 2 and Y 3 are each independently a group having at least one hydrolyzable silyl group.

First claim

What is claimed is:

1. A fluorinated polymer containing units represented by the following formula (1):

wherein X 1 and X 2 are each independently a hydrogen atom or a fluorine atom,
Q 1 is a single bond or an etheric oxygen atom,
R f1 is a fluoroalkylene group or a fluoroalkylene group having at least 2 carbon atoms and having an etheric oxygen atom between carbon atoms,
Z 1 is NR 1 —Y 1 , O—Y 2 or S—Y 3 ,
R 1 is a hydrogen atom, an alkyl group or an aryl group, and
Y 1 , Y 2 and Y 3 are each independently a group having at least one hydrolyzable silyl group.

2. The fluorinated polymer according to claim 1 , wherein the units represented by the formula (1) are —[CF 2 —CF(O(CF 2 ) 3 CONH—C 3 H 6 —SiR 2 m 1 (W 1 ) 3-m 1 )]— or —[CF 2 —CF(O(CF 2 ) 3 CONH—C 2 H 4 —NH—C 3 H 6 —SiR 2 m 1 (W 1 ) 3-m 1 )]—, wherein R 2 is each independently an alkyl group, W 1 is each independently a halogen atom or an alkoxy group, and m is each independently 0, 1 or 2.

3. The fluorinated polymer according to claim 1 , which further contains units represented by the following formula (1a):

wherein X 1 , X 2 , Q 1 and R f1 are as defined in claim 1 ,
Z 2 is a halogen atom, OH or OR 7 , and
R 7 is an alkyl group.

4. The fluorinated polymer according to claim 3 , wherein Z 1 is NR 1 —Y 1 , and Z 2 is OR 7 .

5. The fluorinated polymer according to claim 1 , which further contains units derived from a fluoroethylene.

6. The fluorinated polymer according to claim 1 , which further contains units represented by the following formula (3) (excluding units derived from a fluoroethylene):
—[CX 3 X 4 —CX 5 X 6 ]—  (3)

wherein X 3 and X 4 are each independently a hydrogen atom, a fluorine atom or a chlorine atom,
X 5 is a hydrogen atom, a fluorine atom or a chlorine atom, and
X 6 is a hydrogen atom, a fluoroalkyl group, a fluoroalkyl group having at least 2 carbon atoms and having an etheric oxygen atom between carbon atoms, a fluoroalkoxy group, a fluoroalkoxy group having at least 2 carbon atoms and having an etheric oxygen atom between carbon atoms, a fluoroalkenyl group, or a fluoroalkenyl group having at least 3 carbon atoms and having an etheric oxygen atom between carbon atoms.

7. The fluorinated polymer according to claim 1 , wherein the content of the group represented by —COZ 1 is from 0.01 to 4 mmol/g.

8. A method for producing the fluorinated polymer as defined in claim 1 , which comprises reacting a fluorinated polymer containing units represented by the following formula (1a) and not containing the above units (1), and at least one compound selected from the group consisting of an aminosilane compound, an epoxysilane compound, a mercaptosilane compound and an isocyanatosilane compound:

wherein X 1 , X 2 , Q 1 and R f1 are as defined in claim 1 , and
Z 2 is as defined in claim 3 .

9. A coating composition, which comprises the fluorinated polymer as defined in claim 1 , and a fluorinated solvent.

10. A cured product of the fluorinated polymer as defined in claim 1 .

11. A formed product formed from the cured product as defined in claim 10 .

12. The formed product according to claim 11 , which is a film.

13. An article comprising a substrate, and a layer of a cured product of the fluorinated polymer as defined in claim 1 , formed on the surface of the substrate.

14. The article according to claim 13 , which has a primer layer between the surface of the substrate and the layer of a cured product of the fluorinated polymer.

Assignees

• Agc Inc

Inventors

• Sugiyama Norihide

Classifications

• C08K5/5465

  containing at least one C=N bond · CPC title

• C08J7/043

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• C08K5/544

  containing nitrogen · CPC title

• C09D127/18

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C08K5/548

  containing sulfur {(C08K5/5477 takes precedence)} · CPC title