Organic solution of fluorinated copolymer having carboxylic acid groups

• US 4,385,150 A
• Filed: 10/08/1981
• Issued: 05/24/1983
• Est. Priority Date: 10/17/1980
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Sugaya, Yoshio, Miyake, Haruhisa, Asawa, Tatsuro
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): SAROFIM, NABIL F
• Application Number:
  US06/309,775
• Time in Patent Office: 593 Days
• Field of Search: 524/389, 524/104, 524/253, 524/354, 524/364
• US Class Current: 524/389
• CPC Class Codes: C08F 214/184 with fluorinated vinyl ethers
• CPC Class Codes: C08J 2327/12 containing fluorine atoms
• CPC Class Codes: C08J 3/09 in organic liquids

Abstract

An organic solution of a fluorinated copolymer having carboxylic acid groups comprises the copolymer of fluorinated ethylenically unsaturated monomer and a functional monomer having carboxylic acid group (--COOH group) dissolved in a hydrophilic organic solvent with a small amount of water.

Claims

1. A process for preparing a solution comprising mixing the polymer of fluorinated ethylenically unsaturated monomer selected from the group consisting of tetrafluoroethylene, trifluorochloroethylene, hexafluoropropylene, trifluoroethylene, vinylidene fluoride and vinyl fluoride and a functional monomer having a carboxylic acid group (--COOH group) with a hydrophilic organic solvent selected from the group consisting of alcohols, ketones, organic acids, aldehydes and amines, containing 0.001 to 30 weight percent of water to form a solution.

2. The process according to claim 1 wherein said functional monomer is a compound having the formula

3. The process according to claim 1 wherein said fluorinated ethylenically unsaturated monomer is a fluorinated olefinic compound having the formula CF₂ ═

CZZ'"'"' wherein Z and Z'"'"' respectively represent --F, --Cl, --H or --CF₃.

4. The process according to claim 2 wherein said functional monomer is a fluorovinyl compound having the formula ##STR2## wherein p is 0 or 1;

q is 0 or 1;

r is 0 or an integer of 1 to 8; and

B is --COOH.

5. The process according to claim 3 wherein said fluorinated ethylenically unsaturated monomer is tetrafluoroethylene.