ADHESIVE ARTICLE, COMPOSITE ARTICLE, AND METHODS OF MAKING THE SAME

• US 20070148473A1
• Filed: 12/28/2005
• Published: 06/28/2007
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Jing, Naiyong, Clark, John, Moore, George, Melancon, Kurt, Muggli, Mark, Sherman, Audrey, Filiatrault, Timothy
• Granted Patent: US 7,560,166 B2
• Time in Patent Office: Days
• US Class Current: 428/447
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/748 Releasability
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/283 comprising polysiloxanes
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 27/42 comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
• CPC Class Codes: B32B 7/06 permitting easy separation
• CPC Class Codes: C08G 77/458 containing polyurethane sequences
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C09J 183/04 Polysiloxanes
• CPC Class Codes: C09J 183/10 Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09J151/08, C09J153/00
• CPC Class Codes: C09J 2301/414 presence of a copolymer
• CPC Class Codes: C09J 2427/006 in the substrate
• CPC Class Codes: C09J 2475/00 Presence of polyurethane
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 428/31663 : As siloxane, silicone or silane

Abstract

An adhesive article comprising a fluorothermoplastic film having a major surface; and a pressure sensitive adhesive layer adhered to at least a portion of the first major surface, wherein the pressure sensitive adhesive comprises a silicone polyurea block copolymer and an MQ tackifying resin. Composite articles preparable from the adhesive articles, and methods of making the same are also disclosed.

Claims

1. An adhesive article comprising:

a fluorothermoplastic film having a interior portion and a major surface; and

a pressure sensitive adhesive layer adhered to at least a portion of the major surface, wherein the pressure sensitive adhesive comprises a silicone polyurea block copolymer and an MQ tackifying resin, and wherein the silicone polyurea block copolymer comprises n blocks represented by the formula

 

and m blocks represented by the formula

 

wherein

each R independently represents a monovalent group selected from the group consisting of alkyl groups, vinyl groups, higher alkenyl groups, cycloalkyl groups, aryl groups, and fluorine-containing groups;

each Z independently represents a divalent group selected from the group consisting of arylene groups, alkarylene groups, aralkylene groups, alkylene groups, and cycloalkylene groups, and combinations thereof,

each Y independently represents a divalent group selected from the group consisting of alkylene groups, alkarylene groups, aralkylene groups, arylene groups, and combinations thereof;

each D is independently selected from the group consisting of hydrogen, alkyl groups having 1 to 10 carbon atoms, phenyl, and groups that complete a ring structure including B or Y to form a heterocycle;

each B independently represents a divalent group selected from the group consisting of alkylene groups, alkarylene groups, aralkylene groups, cycloalkylene groups, arylene groups, and poly(alkyleneoxy) groups, and combinations thereof;

p is an integer number that is at least 10;

n is an integer that is at least 1; and

m is an integer in a range of from at least 1 up to and including 1,000, and wherein the ratio of n to m is in a range of from about 1;

10 to about 10;

1.

2. An adhesive article according to claim 1, wherein the major surface and the interior portion of the fluoropolymer film have the same composition.

3. An adhesive article according to claim 1, wherein

4. An adhesive article according to claim 1, wherein

5. An adhesive article according to claim 1, wherein the film has a thickness in a range of from about 100 micrometers to about 300 micrometers.

6. An adhesive article according to claim 1, wherein R is methyl, Z is —

CH₂C₆H₄C(CH₃)₂C₆H₄CH₂—

, Y is —

CH₂CH₂CH₂—

, D is H, and B is —

CH₂CH₂CH₂CH(CH₃)—

.

7. An adhesive article according to claim 1, wherein the fluorothermoplastic film comprises at least one fluorothermoplastic material selected from the group consisting of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymers;

tetrafluoroethylene-hexafluoropropylene copolymers;

tetrafluoroethylene-perfluoropropyl vinyl ether copolymers;

tetrafluoroethylene-hexafluoropropylene copolymers;

ethylene-tetrafluoroethylene copolymers;

tetrafluoroethylene-propylene copolymers; and

tetrafluoroethylene-hexafluoropropylene-ethylene copolymers.

8. An adhesive article according to claim 1, further comprising a release liner releasably adhered to at least a portion of the pressure sensitive adhesive layer.

9. A composite article comprising an adhesive article according to claim 1 adhered to a substrate, wherein at least a portion of the pressure sensitive adhesive layer is adhesively adhered to the substrate.

10. A composite article according to claim 9, wherein the substrate comprises at least one of glass, polyester, polyamide, polymethyl methacrylate, polypropylene, metal, fiberglass or ceramic.

11. A method of making a composite article, the method comprising providing a fluorothermoplastic article according to claim 1, and adhering at least a portion of the pressure sensitive adhesive layer to a substrate.

12. An adhesive article according to claim 1, wherein if the pressure sensitive adhesive layer of the adhesive article is adhered to glass and peeled according to the 180°

Peel Adhesion Test, then the pressure sensitive adhesive layer cleanly releases from the glass and remains adhered to the nonporous fluorothermoplastic film.

13. An adhesive article according to claim 1, wherein the ratio of n to m is about one.

14. A method of making an adhesive article, the method comprising adhering a pressure sensitive adhesive layer to at least a portion of a major surface of a fluorothermoplastic film, wherein the pressure sensitive adhesive comprises a silicone polyurea block copolymer and an MQ tackifying resin, wherein the pressure sensitive adhesive comprises a silicone polyurea block copolymer and an MQ tackifying resin, and wherein the silicone polyurea block copolymer comprises n blocks represented by the formula

15. A method according to claim 14, wherein the fluoropolymer film further comprises an interior portion, and wherein the major surface and the interior portion of the fluoropolymer film have the same composition.

16. A method according to claim 14, wherein

17. A method according to claim 14, wherein

18. A method according to claim 14, wherein the film has a thickness in a range of from about 100 micrometers to about 300 micrometers.

19. A method according to claim 14, further comprising adhering a release liner to at least a portion of the pressure sensitive adhesive layer.

20. A method according to claim 14, further comprising adhering a substrate to at least a portion of the pressure sensitive adhesive layer.

21. A method according to claim 14, wherein R is methyl, Z is —

CH₂C₆H₄C(CH₃)₂C₆H₄CH₂—

, Y is —

CH₂CH₂CH₂—

, D is H, and B is —

CH₂CH₂CH₂CH(CH₃)—

.

22. A method according to claim 14, wherein the fluorothermoplastic film comprises at least one fluorothermoplastic material selected from the group consisting of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymers;

tetrafluoroethylene-hexafluoropropylene copolymers;

tetrafluoroethylene-perfluoropropyl vinyl ether copolymers;

tetrafluoroethylene-hexafluoropropylene copolymers;

ethylene-tetrafluoroethylene copolymers;

tetrafluoroethylene-propylene copolymers; and

tetrafluoroethylene-hexafluoropropylene-ethylene copolymers.

23. A method according to claim 14, wherein the substrate comprises at least one of glass, polyester, polyamide, polymethyl methacrylate, polypropylene, metal, fiberglass or ceramic.

24. A method of making an adhesive article according to claim 14, wherein if the pressure sensitive adhesive layer of the adhesive article is adhered to glass and peeled according to the 180°

Peel Adhesion Test, then the pressure sensitive adhesive layer cleanly releases from the glass and remains adhered to the nonporous fluorothermoplastic film.

25. A method of making an adhesive article according to claim 14, wherein the ratio of n to m is about one.