POLYVINYLIDENE FLUORIDE FILMS AND LAMINATES THEREOF

• US 20090202792A1
• Filed: 06/05/2007
• Published: 08/13/2009
• Est. Priority Date: 06/29/2006
• Status: Abandoned Application

• Current Assignee: Ccl Label Incorporated (CCL Industries Incorporated)
• Original Assignee: Avery Dennison Corporation
• Inventors: Truog, Keith Lawson
• Application Number:
  US12/306,282
• Publication Number:
  US 20090202792A1
• Time in Patent Office: Days
• US Class Current: 428/195.100
• CPC Class Codes: C08J 2327/16 Homopolymers or copolymers of vinylidene fluoride
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 27/16 Homopolymers or copolymers or vinylidene fluoride
• CPC Class Codes: C08L 33/066 containing -OH groups
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 61/28 with melamine
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers

Abstract

A fluoropolymer film useful in a laminate construction comprising a fiberglass reinforced substrate and a high temperature resistant film comprising a fluoropolymer layer formed from a composition comprising (a) a polyvinylidene fluoride polymer; (b) a hydroxyl functional acrylic polymer; and (c) a crosslinking agent is provided.

Claims

1. A laminate comprising:

a heat and chemical resistant film comprising a fluoropolymer layer formed from a composition comprising (a) a thermoplastic polyvinylidene fluoride copolymer of vinylidene fluoride and hexafluoropropylene;

(b) a hydroxyl functional acrylic polymer; and

(c) a crosslinking agent; and

a polyester carrier layer adhered to the film.

2. The laminate of claim 1 wherein the crosslinking agent comprises a melamine resin.

3. The laminate of claim 1 wherein the fluoropolymer layer composition comprises 40-60% by weight polyvinylidene fluoride copolymer and 40-60% by weight hydroxyl functional acrylic polymer.

4. The laminate of claim 1 wherein the fluoropolymer layer composition further comprises an alkyl methacrylate polymer or copolymer.

5. The laminate of claim 4 wherein the alkyl methacrylate polymer comprises polymethylmethacrylate.

6. The laminate of claim 1 wherein the fluoropolymer layer composition further comprises at least one UV stabilizer.

7. The laminate of claim 1 wherein the hydroxyl functional acrylic polymer comprises a copolymer of methyl methacrylate, n-butyl methacrylate, hydroxyethyl methacrylate and methacrylic acid.

8. The laminate of claim 1 wherein the polyester carrier layer is removably adhered to the film.

9. The laminate of claim 1 wherein the polyester carrier layer is permanently adhered to the film.

10. The laminate of claim 9 further comprising a primer layer between the fluoropolymer layer and the polyester carrier layer, the primer layer comprising a polyvinylidene fluoride copolymer and a hydroxyl functional acrylic polymer crosslinked with a melamine crosslinker.

11. The laminate of claim 1 further comprising a printed layer.

12. The laminate of claim 1 wherein the film is translucent.

13. A laminate comprising a fiberglass reinforced substrate and a high temperature resistant film comprising a fluoropolymer layer formed from a composition comprising (a) a thermoplastic polyvinylidene fluoride copolymer of vinylidene fluoride and hexafluoropropylene;

(b) a hydroxyl functional acrylic polymer; and

(c) a crosslinking agent.

14. The laminate of claim 13 wherein the high temperature resistant film further comprises a printed layer.

15. The laminate of claim 13 wherein the high temperature resistant film further comprises a polyester layer disposed between the fluoropolymer layer and the substrate.

16. The laminate of claim 15 further comprising a primer layer between the fluoropolymer layer and the polyester layer, the primer layer comprising a polyvinylidene fluoride copolymer and a hydroxyl functional acrylic polymer crosslinked with a melamine crosslinker.

17. The laminate of claim 13 wherein the composition further comprises an alkyl methacrylate polymer or copolymer.

18. The laminate of claim 13 wherein the high temperature resistant film is translucent.

19. A method of making a fiberglass reinforced laminate comprising:

providing a carrier film;

depositing a polyester resin onto the carrier film;

distributing chopped glass onto the polyester resin to form a fiberglass reinforced substrate;

providing a fluoropolymer film comprising a fluoropolymer layer formed from a composition comprising (a) a thermoplastic polyvinylidene fluoride copolymer of vinylidene fluoride and hexafluoropropylene;

(b) a hydroxyl functional acrylic polymer; and

(c) a crosslinking agent;

laminating the fluoropolymer film to the fiberglass reinforced substrate;

curing the resin to form a fiberglass reinforced laminate.

20. The method of claim 19 wherein the crosslinking agent comprises a melamine resin.

21. The method of claim 19 wherein the fluoropolymer layer composition comprises 40-60% by weight polyvinylidene fluoride copolymer and 40-60% by weight hydroxyl functional acrylic polymer.

22. The method of claim 19 wherein the fluoropolymer layer composition further comprises an alkyl methacrylate polymer or copolymer.

23. The method of claim 22 wherein the alkyl methacrylate polymer comprises polymethylmethacrylate.

24. The method of claim 19 wherein the fluoropolymer layer composition further comprises at least one UV stabilizer.

25. The method of claim 19 wherein the hydroxyl functional acrylic polymer comprises a copolymer of methyl methacrylate, n-hutyl methacrylate, hydroxyethyl methacrylate and methacrylic acid.