Non-aqueous cross-linkable fluoropolymer compositions

Patent metadata

Field	Value
Publication number	US-10280247-B2
Application number	US-201615561780-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Mar 26, 2015
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The present invention relates to non-aqueous fluoropolymer compositions useful for the preparation of polymeric materials.

First claim

The invention claimed is:

1. A non-aqueous fluoropolymer composition (FC) comprising:
at least one fluorinated ionisable polymer (A) comprising recurring (per)fluorinated blocks (F), recurring functional blocks (B a ) and at least one curable group (C), said blocks (B a ) comprising at least one ionisable anionic group (I − );
at least one fluorinated ionisable polymer (B) comprising recurring (per)fluorinated blocks (F), recurring functional blocks (B b ) and at least one curable group (C), said blocks (B b ) comprising at least one ionisable cationic group (I + );
at least one fluorinated solvent (F); and
at least one solvent (S) different from said solvent (F).

2. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said blocks (F) and said blocks (B a ) are linked together by at least one moiety (U) selected from urethane moieties and urea moieties.

3. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said blocks (F) and said blocks (B b ) are linked together by at least one moiety (U) selected from urethane moieties and urea moieties.

4. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said at least one group (C) is a group derived from acrylate or 2-alkyl acrylate.

5. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said at least one group (C) is a UV curable group or a thermally curable group.

6. The non-aqueous fluoropolymer composition (FC) according to claim 5 , wherein said at least one group (C) is a UV-curable group derived from an acrylate or a 2-alkyl acrylate.

7. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said solvent (F) is a hydrocarbon or aromatic solvent containing one or more fluorine atoms and, optionally, one or more oxygen atoms.

8. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said solvent (S) is selected from alcohols and aprotic dipolar solvents.

9. The non-aqueous fluoropolymer composition (FC) according to claim 1 , wherein said composition (FC) further comprises a photo-initiator.

10. A process for the preparation of a non-aqueous fluoropolymer composition (FC) as defined in claim 1 , said process comprising:
mixing polymer (A) and polymer (B) in at least one fluorinated solvent (F) and in at least one solvent (S) different from said solvent (F), wherein:
polymer (A) comprises recurring (per)fluorinated blocks (F), recurring functional blocks (B a ) and at least one curable group (C), said blocks (B a ) comprising at least one ionisable anionic group (I − ); and
polymer (B) comprises recurring (per)fluorinated blocks (F), recurring functional blocks (B b ) and at least one curable group (C), said blocks (B b ) comprising at least one ionisable cationic group (I + ).

11. The process according to claim 10 , said process further comprising step (iv) of adding a photo-initiator.

12. A polymeric article made from a composition according to claim 1 .

13. The polymeric article according to claim 12 , said article being in the form of a sealing agent, a gasket, a membrane, a film and a coating.

14. A process for preparing the polymeric article according to claim 12 , said process comprising:
film-casting or moulding non-aqueous fluoropolymer composition (FC) and
curing said composition (FC) by thermal- or UV activated-crosslinking, wherein composition (FC) comprises:
at least one fluorinated ionisable polymer (A) comprising recurring (per)fluorinated blocks (F), recurring functional blocks (B a ) and at least one curable group (C), said blocks (B a ) comprising at least one ionisable anionic group (I − );
at least one fluorinated ionisable polymer (B) comprising recurring (per)fluorinated blocks (F), recurring functional blocks (B b ) and at least one curable group (C), said blocks (B b ) comprising at least one ionisable cationic group (I + );
at least one fluorinated solvent (F); and
at least one solvent (S) different from said solvent (F).

Assignees

• Solvay Specialty Polymers It

Inventors

• Tonelli Claudio Adolfo Pietro
• Barbieri Solange
• Marchionni Giuseppe

Classifications

• C08F20/18

  with acrylic or methacrylic acids · CPC title

• C08F299/024

  the unsaturation being in acrylic or methacrylic groups · CPC title

• C09D175/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08J3/244

  Stepwise homogeneous crosslinking of one polymer with one crosslinking system, e.g. partial curing · CPC title

• C08G18/0823

  containing carboxylate salt groups or groups forming them · CPC title