Non-aqueous fluoropolymer compositions

Patent metadata

Field	Value
Publication number	US-9683151-B2
Application number	US-201314652095-A
Country	US
Kind code	B2
Filing date	Dec 4, 2013
Priority date	Dec 13, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The invention relates to a non-aqueous fluoropolymer composition comprising: a) at least one fluorinated ionizable polymer [polymer (A)] as defined in the description, and b) at least one fluorinated ionizable polymer [polymer (B)] as defined in the description; c) at least one fluorinated solvent; and d) at least one alcohol. The invention further relates to a process for manufacturing the composition and to the use of the composition for preparing polymeric materials.

First claim

The invention claimed is:

1. A non-aqueous fluoropolymer composition comprising:
a) at least one fluorinated ionisable polymer (A), which comprises recurring fluorinated blocks and recurring functional blocks, each of said recurring functional blocks comprising at least one ionisable anionic group, and wherein at least one of the said recurring functional blocks is comprised between two fluorinated blocks; and
b) at least one fluorinated ionisable polymer (B), which comprises recurring fluorinated blocks and recurring functional blocks, each of said recurring functional blocks comprising at least one ionisable cationic group, and wherein at least one of the said recurring functional blocks is comprised between two fluorinated blocks;
c) at least one fluorinated solvent; and
d) at least one alcohol.

2. A non-aqueous fluoropolymer composition according to claim 1 , wherein the equivalent ratio between the ionic equivalents of polymer (A) and the ionic equivalents of polymer (B) is higher or lower than 1:1.

3. A non-aqueous fluoropolymer composition according to claim 2 further comprising a cross-linking agent.

4. A process for the preparation of a non-aqueous fluoropolymer composition according to claim 1 , the process comprising:
mixing at least one fluorinated ionisable polymer (A) and at least one fluorinated ionisable polymer (B) in a fluorinated solvent and alcohol.

5. A process according to claim 4 wherein polymer (A) and polymer (B) are dispersed in the fluorinated solvent and alcohol mixture in an equivalent ratio higher or lower than 1:1.

6. A process according to claim 5 wherein a cross-linking agent is also mixed with in the fluorinated solvent and alcohol.

7. A process for preparing a polymeric material, the process comprising film-casting or moulding and drying a non-aqueous fluoropolymer composition comprising:
a) at least one fluorinated ionisable polymer (A), which comprises recurring fluorinated blocks and recurring functional blocks, each of said recurring functional blocks comprising at least one ionisable anionic group, and wherein at least one of the said recurring functional blocks is comprised between two fluorinated blocks; and
b) at least one fluorinated ionisable polymer (B), which comprises recurring fluorinated blocks and recurring functional blocks, each of said recurring functional blocks comprising at least one ionisable cationic group, and wherein at least one of the said recurring functional blocks is comprised between two fluorinated blocks;
c) at least one fluorinated solvent; and
d) at least one alcohol.

8. The process of claim 7 , wherein the polymeric material is film-casted or moulded into the form of a sealing agent, a gasket, a membrane, a film or a coating.

9. The process of claim 7 , wherein the recurring fluorinated blocks are each independently a (per)fluoropolyether block comprising randomly distributed repeating units each independently selected from:
—CFXO—, wherein X is F or CF 3 ;  (i)

—CF 2 CFXO—, wherein X is F or CF 3 ;  (ii)

—CF 2 CF 2 CF 2 O—;  (iii)

—CF 2 CF 2 CF 2 CF 2 O—.  (iv)

10. The process of claim 9 , wherein (per)fluoropolyether block comprises —CF 2 O— and —CF 2 CF 2 O— units in a molar ratio of between 0.1 and 10.

11. The process of claim 7 , wherein the recurring functional blocks comprising at least one ionisable anionic group each independently comprise:
(a) a hydrocarbon chain that includes at least one functional group selected from —COOH, —SO 3 H, and —OPO 3 H 4 , and
(b) optionally one or more aromatic, heteroaromatic, cycloaliphatic or heterocycloaliphatic groups.

12. The process of claim 7 , wherein the recurring functional blocks comprising at least one ionisable cationic group each independently comprise:
(a) a hydrocarbon chain that includes at least one functional group selected from chain amines of formula —N(R N )— and pendant amines of formula —N(R N1 )(R N2 ), wherein R N , R N1 and R N2 are each independently selected from hydrogen and hydrocarbon groups containing from 1 to 6 carbon atoms, and
(b) optionally one or more aromatic, heteroaromatic, cycloaliphatic or heterocycloaliphatic groups.

13. The process of claim 1 , wherein the recurring fluorinated blocks are each independently a (per)fluoropolyether block comprising randomly distributed repeating units each independently selected from:
—CFXO—, wherein X is F or CF 3 ;  (i)

—CF 2 CFXO—, wherein X is F or CF 3 ;  (ii)

—CF 2 CF 2 CF 2 O—;  (iii)

—CF 2 CF 2 CF 2 CF 2 O—.  (iv)

14. The process of claim 13 , wherein (per)fluoropolyether block comprises —CF 2 O— and —CF 2 CF 2 O— units in a molar ratio of between 0.1 and 10.

15. The process of claim 1 , wherein the recurring functional blocks comprising at least one ionisable anionic group each independently comprise:
(a) a hydrocarbon chain that includes at least one functional group selected from —COOH, —SO 3 H, and —OPO 3 H 4 , and
(b) optionally one or more aromatic, heteroaromatic, cycloaliphatic or heterocycloaliphatic groups.

16. The process of claim 1 , wherein the recurring functional blocks comprising at least one ionisable cationic group each independently comprise:
(a) a hydrocarbon chain that includes at least one functional group selected from chain amines of formula —N(R N )— and pendant amines of formula —N(R N1 )(R N2 ), wherein R N , R N1 and R N2 are each independently selected from hydrogen and hydrocarbon groups containing from 1 to 6 carbon atoms, and
(b) optionally one or more aromatic, heteroaromatic, cycloaliphatic or heterocycloaliphatic groups.

Assignees

• Solvay Specialty Polymers It

Inventors

• Petricci Silvia Rita
• Barbieri Solange
• Tonelli Claudio Adolfo Pietro
• Marchionni Giuseppe

Classifications

• C08G18/0852

  the solvents being organic · CPC title

• C08L71/00

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08G18/0814

  containing ammonium groups or groups forming them · CPC title

• C08G18/5015 Primary

  having fluorine atoms · CPC title

• C08G18/246

  containing also tin-carbon bonds · CPC title