Chlorotrifluoroethylene copolymer

Patent metadata

Field	Value
Publication number	US-9266986-B2
Application number	US-57806605-A
Country	US
Kind code	B2
Filing date	Apr 13, 2005
Priority date	Apr 13, 2004
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

The present invention provides a chlorotrifluoroethylene copolymer endowed with stress cracking resistance, chemical resistance and thermal stability. The present invention is a chlorotrifluoroethylene copolymer constituted of chlorotrifluoroethylene unit, tetrafluoroethylene unit and a monomer [A] unit derived from a monomer [A] copolymerizable with chlorotrifluoroethylene and tetrafluoroethylene, wherein the sum of chlorotrifluoroethylene unit and the tetrafluoroethylene unit amounts to 90 to 99.9 mole percent and the monomer [A] unit amounts to 0.1 to 10 mole percent.

First claim

The invention claimed is:

1. A chlorotrifluoroethylene copolymer constituted which consists of chlorotrifluoroethylene unit, tetrafluoroethylene unit and a monomer (A) unit derived from a monomer (A) copolymerizable with chlorotrifluoroethylene and tetrafluoroethylene,
wherein the sum of said chlorotrifluoroethylene unit and said tetrafluoroethylene unit amounts to 90 to 99.9 mole % and
said monomer (A) unit amounts to 0.1 to 10 mole %,
when the monomer (A) is a PAVE, the monomer (A) unit amounts to not less than 0.5 mole %,
wherein the chlorotrifluoroethylene unit amounts to 12.6 to 62.5 mole % of the sum of said chlorotrifluoroethylene unit and the tetrafluoroethylene unit,
wherein the temperature (Tx) required for causing decomposition of 1% by mass of said chlorotrifluoroethylene copolymer is not lower than 370° C.,
wherein said chlorotrifluoroethylene copolymer has a melting point (Tm) of 150 to 300° C., and
wherein the monomer (A) is at least one monomer selected from the group consisting of ethylene, vinylidene fluoride, a perfluoro(alkyl vinyl ether) and a vinyl monomer represented by the general formula (I):
CX 3 X 4 ═CX 1 (CF 2 ) n -X 2   (I)

wherein X 1 , X 3 and X 4 are the same or different and each represents hydrogen atom or fluorine atom, X 2 represents hydrogen atom, fluorine atom or chlorine atom and n represents an integer of 1 to 10.

2. The chlorotrifluoroethylene copolymer according to claim 1 ,
wherein the monomer (A) is a perfluoro(alkyl vinyl ether) represented by the general formula (II):
CF 2 ═CF—ORf 1   (II)

wherein Rf 1 represents a perfluoroalkyl group containing 1 to 8 carbon atoms.

3. The chlorotrifluoroethylene copolymer according to claim 1 ,
wherein the chlorotrifluoroethylene unit amounts to 15 to 55 mole % of the sum of said chlorotrifluoroethylene unit and the tetrafluoroethylene unit.

4. The chlorotrifluoroethylene copolymer according to claim 1 ,
which has a melt flow rate of 0.1 to 70 g/10 minutes.

5. A molded article obtained by using the chlorotrifluoroethylene copolymer according to claim 1 .

6. The molded article according to claim 5 which is a fluid transfer member.

7. The chlorotrifluoroethylene copolymer according to claim 1 ,
wherein the sum of said chlorotrifluoroethylene unit and said tetrafluoroethylene unit amounts to 90 to 98.6 mole % and
said monomer (A) unit amounts to 1.4 to 10 mole %.

8. The chlorotrifluoroethylene copolymer according to claim 1 ,
wherein the sum of said chlorotrifluoroethylene unit and said tetrafluoroethylene unit amounts to 90 to 98.6 mole % and
said monomer (A) unit amounts to 1.4 to 10 mole %.

Assignees

• Shimono Takeshi
• Aoyama Takahisa
• Torimae Hiroshi
• Kitahara Takahiro
• Daikin Ind Ltd

Inventors

• Shimono Takeshi
• Aoyama Takahisa
• Torimae Hiroshi
• Kitahara Takahiro

Classifications

• C08F214/242

  with fluorinated vinyl ethers · CPC title

• C08F214/265

  with non-fluorinated comonomers · CPC title

• C08F214/26

  Tetrafluoroethene · CPC title

• C08F214/245

  with non-fluorinated comonomers · CPC title

• C08F214/24 Primary

  Trifluorochloroethene · CPC title