Multi-layer assembly, multi-layer stretch releasing pressure-sensitive adhesive assembly, and methods of making and using the same

• US 8,334,037 B2
• Filed: 05/11/2007
• Issued: 12/18/2012
• Est. Priority Date: 05/11/2007
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Sheridan, Margaret M., Bries, James L., Malmer, Jeffrey D.
• Primary Examiner(s): Sheikh, Humera
• Assistant Examiner(s): MOORE, WALTER A
• Application Number:
  US11/747,443
• Publication Number:
  US 20080280086A1
• Time in Patent Office: 2,048 Days
• Field of Search: 428/41.9, 428/40.7, 428/354, 428/906, 428/40.1, 428/40.2, 428/40.3, 428/40.4, 428/40.5, 428/40.6, 428/40.8, 428/40.9, 428/41.1, 428/41.2, 428/41.3, 428/41.4, 428/41.5, 428/41.6, 428/41.7, 428/41.8, 428/42.1, 428/42.3, 428/317.1, 428/317.3, 156/60, 156/289
• US Class Current: 428/40.7
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: C09J 2301/208 the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
• CPC Class Codes: C09J 2301/21 the adhesive layer being formed by alternating adhesive areas of different nature
• CPC Class Codes: C09J 2400/243 in the substrate
• CPC Class Codes: C09J 2453/00 Presence of block copolymer
• CPC Class Codes: C09J 2475/00 Presence of polyurethane
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: C09J 7/401 characterised by the release coating composition
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1429 Fluorine
• CPC Class Codes: Y10T 428/1462 Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/1481 Dissimilar adhesives

Abstract

A multi-layer assembly that includes a release liner, a first layer disposed on the release liner, the first layer including a pressure-sensitive adhesive composition that includes a silicone polymer that includes silicone polyurea block copolymers, polydiorganosiloxane polymers, or combinations thereof, a second layer disposed on the first layer, the second layer including a composition that includes an elastomer, the composition of the second layer being different from the pressure-sensitive adhesive composition of the first layer, the first layer of the multi-layer assembly exhibiting a release force to the release liner of no greater than 100 gram per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120° F.

Claims

1. A multi-layer assembly comprising:

a release liner comprising

a first major surface,

a second major surface,

a first release agent on the first major surface of the release liner, the first release agent comprising the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent, and

a second release agent on the second major surface of the release liner;

a first layer comprising a pressure-sensitive adhesive composition in contact with the first release agent on the first major surface of the release liner, the pressure-sensitive adhesive composition comprising silicone polyurea block copolymer; and

a second layer comprising a pressure-sensitive adhesive composition comprising an elastomer in contact with the first layer, the composition of the pressure-sensitive adhesive composition of the second layer being different from the composition of the pressure-sensitive adhesive composition of the first layer,

the first layer of the multi-layer assembly exhibiting a release force to the release liner of no greater than 100 gram per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120°

F.;

wherein the multi-layer assembly is in the form of a roll, and the second layer is in contact with the second release agent on the second major surface of the release liner.

2. The multi-layer assembly of claim 1, wherein the first layer of the multi-layer assembly exhibits a release force to the release liner of no greater than 50 g per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120°

F.

3. The multi-layer assembly of claim 1, wherein the first layer of the multi-layer assembly exhibits a release force to the release liner of no greater than 200 g per 0.5 inch width after the multi-layer assembly has been stored for 88 days at 120°

F.

4. The multi-layer assembly of claim 1, wherein the first layer of the multi-layer assembly exhibits a release force to the release liner of no greater than 100 g per 0.5 inch width after the multi-layer assembly has been stored for 88 days at 120°

F.

5. The multi-layer assembly of claim 1, wherein when the release liner is removed and the assembly is bonded to a painted drywall surface through the first layer, the assembly exhibits a static shear to the painted drywall of at least 30,000 minutes.

6. The multi-layer assembly of claim 1, wherein when the release liner is removed and the assembly is bonded to a glass substrate through the first layer, the assembly exhibits a static shear to the glass substrate of at least 30,000 minutes.

7. The multi-layer assembly of claim 1, wherein when the release liner is removed and the assembly is bonded to a glass substrate through the first layer, the assembly exhibits a static shear to the glass substrate of at least 30,000 minutes at 90% relative humidity and 90°

F.

8. The multi-layer assembly of claim 1, wherein the multi-layer assembly is wound up on itself in the form of a roll.

9. The multi-layer assembly of claim 1, wherein the first layer exhibits a first release force to the first major surface of the release liner and the second layer exhibits a second release force to the second major surface of the release liner, the ratio of the first release force to the second release force being at least 1.5:

1.

10. The multi-layer assembly of claim 9, wherein the ratio of the first release force to the second release force is at least 2:

1.

11. The multi-layer assembly of claim 9, wherein the ratio of the first release force to the second release force is at least 10:

1.

12. The multi-layer assembly of claim 1, wherein the pressure-sensitive adhesive composition of the first layer comprises

a. a silicone polyurea block copolymer comprising the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, and

ii) a polyisocyanate;

and

b. from about 30% by weight to about 70% by weight MQ resin.

13. The multi-layer assembly of claim 12, wherein the silicone polyurea block copolymer comprises the reaction product of a polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, a polyamine, and a polyisocyanate.

14. The multi-layer assembly of claim 1, wherein the elastomer of the second layer comprises at least one of a silicone polymer different from the silicone polymer of the pressure-sensitive adhesive composition of the first layer, acrylic resin, natural rubber, polychloroprene, nitrile rubber, butyl rubber, polysulfide rubber, polyisoprene, ethylene-propylene diene rubber, polyurethane, acrylonitrile-butadiene rubber, acrylonitrile-butadiene-styrene, styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylene-propylene-styrene, and styrene-ethylene-butylene-styrene.

15. The multi-layer assembly of claim 1, wherein the pressure-sensitive adhesive composition of the second layer comprises a silicone polyurea block copolymer.

16. The multi-layer assembly of claim 1, wherein the pressure-sensitive adhesive composition of the second layer comprises the reaction product of isooctylacrylate and acrylic acid.

17. The multi-layer assembly of claim 1, wherein the fluorosilicone polymer of the first release agent comprises at least about 42% fluorine substitution.

18. The assembly of claim 1, wherein the pressure-sensitive adhesive composition of the first layer comprises

a. a silicone polyurea block copolymer comprising the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 150,000 g/mole, and

ii) a polyisocyanate;

and

b. from about 30% by weight to about 70% by weight MQ resin.

19. The assembly of claim 1, wherein the pressure-sensitive adhesive composition of the first layer comprises

a. a silicone polyurea block copolymer comprising the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of from about 25,000 g/mole to about 50,000 g/mole, and

ii) a polyisocyanate;

and

b. from about 30% by weight to about 70% by weight MQ resin.

20. The assembly of claim 1, wherein the second release agent comprises the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent.

21. A multi-layer assembly comprising:

a release liner comprising

a first major surface,

a second major surface,

a first release agent on the first major surface of the release liner, the first release agent comprising the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent, and

a second release agent on the second major surface of the release liner;

a first layer comprising a pressure-sensitive adhesive composition in contact with the first release agent on the first major surface of the release liner, the pressure-sensitive adhesive composition comprising silicone polymer selected from the group consisting of silicone polyurea block copolymers, polydiorganosiloxane polymers, and combinations thereof; and

a second layer comprising a pressure-sensitive adhesive composition comprising an elastomer in contact with the first layer, the composition of the pressure-sensitive adhesive composition of the second layer being different from the composition of the pressure-sensitive adhesive composition of the first layer,

the first layer of the multi-layer assembly exhibiting a release force to the release liner of no greater than 100 gram per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120°

F.;

wherein the multi-layer assembly is in the form of a roll, and the second layer is in contact with the second release agent on the second major surface of the release liner.

22. The assembly of claim 21 further comprising a second composition comprising a reaction product of a fluorosilicone polymer and an organohydrogenpolysiloxane crosslinking agent on the second major surface of the release liner, the second composition being different from the first composition on the first major surface of the release liner.

23. The assembly of claim 21, wherein the fluorosilicone polymer comprises at least about 42% fluorine substitution.

24. The assembly of claim 21, wherein the silicone polymer is selected from the group consisting of silicone polyurea block copolymers prepared from a polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 60,000 g/mole, polydiorganosiloxane polymers having a molecular weight of from about 10,000 g/mole to about 60,000 g/mole, and combinations thereof.

25. The assembly of claim 21, wherein the second release agent comprises the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent.

26. A multi-layer assembly comprising:

a release liner comprising

a first major surface,

a second major surface; and

a first release agent on the first major surface of the release liner, the first release agent comprising a reaction product of a fluorosilicone polymer comprising at least about 42% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent, and

a second release agent on the second major surface of the release liner,

a first layer comprising a pressure-sensitive adhesive composition in contact with the first release agent on the first major surface of the release liner, the pressure-sensitive adhesive composition comprising silicone polyurea block copolymer prepared from a polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 60,000 g/mole; and

a second layer comprising a pressure-sensitive adhesive composition comprising an elastomer in contact with the first layer of pressure-sensitive adhesive and the second release agent of the second major surface of the release liner, the composition of the pressure-sensitive adhesive composition of the second layer being different from the composition of the pressure-sensitive adhesive composition of the first layer,

the first layer of the multi-layer assembly exhibiting a release force to the release liner of no greater than 100 gram per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120°

F.;

wherein the multi-layer assembly is in the form of a roll, and the second layer is in contact with the second release agent on the second major surface of the release liner.

27. The assembly of claim 26, wherein the pressure-sensitive adhesive composition of the first layer comprises

a. a silicone polyurea block copolymer comprising the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 150,000 g/mole, and

ii) a polyisocyanate;

and

b. from about 30% by weight to about 70% by weight MQ resin.

28. The assembly of claim 26, wherein the pressure-sensitive adhesive composition of the first layer comprises

a. a silicone polyurea block copolymer comprising the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of from about 25,000 g/mole to about 50,000 g/mole, and

ii) a polyisocyanate;

and

b. from about 30% by weight to about 70% by weight MQ resin.

29. The assembly of claim 26, wherein the second release agent comprises the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent.

30. A multi-layer assembly comprising:

a release liner comprising

a first major surface,

a second major surface,

a first release agent on the first major surface of the release liner, the first release agent comprising the reaction product of a fluorosilicone polymer comprising at least about 35% fluorine substitution and an organohydrogenpolysiloxane crosslinking agent, and

a second release agent on the second major surface of the release liner;

a first layer comprising a pressure-sensitive adhesive composition in contact with the first composition on the first major surface of the release liner, the pressure-sensitive adhesive composition comprising silicone polyurea block copolymer; and

a second layer comprising silicone polyurea block copolymer in contact with the first layer, the silicone polyurea block copolymer of the second layer being different from the silicone polyurea block copolymer of the first layer,

the first layer of the multi-layer assembly exhibiting a release force to the release liner of no greater than 100 gram per 0.5 inch width after the multi-layer assembly has been stored for 46 days at 120°

F.;

wherein the multi-layer assembly is in the form of a roll, and the second layer is in contact with the second release agent on the second major surface of the release liner.

31. The multi-layer assembly of claim 30, wherein the silicone polyurea block copolymer of the second layer comprises the reaction product of a polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, a polyamine, and a polyisocyanate.