Stretch releasing pressure sensitive adhesive tape and articles

• US 7,078,093 B2
• Filed: 04/08/2003
• Issued: 07/18/2006
• Est. Priority Date: 07/06/2000
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Sherman, Audrey A., Kinning, David J., Bries, James L., Sheridan, Margaret M., Malmer, Jeffrey D.
• Primary Examiner(s): PENG, KUO LIANG
• Application Number:
  US10/409,361
• Publication Number:
  US 20030211317A1
• Time in Patent Office: 1,197 Days
• Field of Search: 428/343, 428/447, 428/40.1, 528/38, 528/28
• US Class Current: 428/343
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• CPC Class Codes: C09J 2301/308 the adhesive tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive
• CPC Class Codes: C09J 2400/243 in the substrate
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 7/10 without carriers
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2883 including addition polymer of diene monomer [e.g., SBR, SIS, etc.]
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

A stretch releasing pressure sensitive adhesive tape includes a silicone pressure sensitive adhesive composition that exhibits a 180° peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm and a non-tacky tab. A stretch releasing pressure sensitive adhesive tape includes a pressure sensitive adhesive composition having a modulus at 1 radian/second and −17° C. of no greater than about 1×10⁷ Pa and a non-tacky tab.

Claims

1. A stretch releasing pressure sensitive adhesive tape comprising:

a pressure sensitive adhesive composition having a modulus at 1 radian/second and −

17°

C. of no greater than about 1×

10⁷ Pa, said pressure sensitive adhesive composition comprising

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,

ii) a polyisocyanate, and

b) from about 39% by weight to about 70% by weight MQ resin; and

a non-tacky tab.

2. The tape of claim 1, wherein said silicone polyurea block copolymer comprises the reaction product of

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

ii) a polyamine, and

iii) a polyisocyanate.

3. The tape of claim 2, wherein the polyamine has a molecular weight no greater than 300 g/mole.

4. The tape of claim 2, wherein said polydiorganosiloxane diamine has a molecular weight of from about 10,000 g/mole to about 65,000 g/mole.

5. The tape of claim 2, wherein said polydiorganosiloxane diamine has a molecular weight of from about 25,000 g/mole to about 50,000 g/mole.

6. The tape of claim 2, wherein said silicone polyurea block copolymer comprises the reaction product of

i) a. polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 65,000 g/mole,

ii) no greater than 3 moles polyamine, and

iii) a polyisocyanate.

7. The tape of claim 2, wherein said silicone polyurea block copolymer comprises the reaction product of

i) a polydiorganosiloxane diamine having a molecular weight of from about 10,000 g/mole to about 65,000 g/mole,

ii) from about 0.25 moles to 2 moles polyamine, and

iii) a polyisocyanate.

8. The tape of claim 2, wherein said pressure sensitive adhesive composition comprises from about 40% by weight to about 60% by weight MQ resin.

9. The tape of claim 2, wherein said pressure sensitive adhesive composition comprises from about 45% by weight to about 55% by weight MQ resin.

10. The tape of claim 1, wherein said pressure sensitive adhesive composition comprises from about 40% by weight to about 60% by weight MQ resin.

11. The tape of claim 1, wherein said pressure sensitive adhesive composition comprises from about 45% by weight to about 55% by weight MQ resin.

12. The tape of claim 1 wherein said pressure sensitive adhesive composition has a modulus at 1 radian/second and −

17°

C. of no greater than about 5×

10⁶ Pa.

13. The tape of claim 1 wherein said pressure sensitive adhesive composition has a modulus at 1 radian/second and −

17°

C. of no greater than about 2×

10⁶ Pa.

14. The tape of claim 1 wherein said pressure sensitive adhesive composition exhibits a 180°

peel strength on a glass substrate at 98% relative humidity of at least about 21.9 N/dm.

15. The tape of claim 1 wherein said pressure sensitive adhesive composition exhibits a 180°

peel strength on a glass substrate at 98% relative humidity of at least about 32.8 N/dm.

16. The tape of claim 1, wherein said tape comprises a pressure sensitive adhesive foam.

17. The tape of claim 1, wherein said tape further comprises a backing, said pressure sensitive adhesive composition being disposed on said backing.

18. The tape of claim 17, wherein said backing is selected from the group consisting of elastic backings, highly extensible backings, and substantially inelastic backings, and combinations thereof.

19. The tape of claim 17, wherein said backing comprises a film selected from the group consisting of single layer, multi-layer, woven, non-woven, porous, and combinations thereof.

20. The tape of claim 17, wherein said backing comprises a layer of polymeric film and a layer of polymeric foam.

21. The tape of claim 17, wherein said backing comprises a layer of foam, a first film disposed on a first surface of said foam and a second film disposed on a second surface of said foam.

22. The tape of claim 17, wherein said backing comprises a treated surface, said pressure sensitive adhesive composition being disposed on said treated surface and exhibiting a greater adhesion to the treated backing relative to an untreated backing.

23. The tape of claim 17, further comprising a primer composition disposed between said pressure sensitive adhesive composition and said backing.

24. The tape of claim 17, wherein a pressure sensitive adhesive composition is disposed on a first major surface of said backing and a second major surface of said backing opposite said first major surface.

25. The tape of claim 1, wherein when a first substrate is bonded to a second substrate through said stretch releasing pressure sensitive adhesive tape, said stretch releasing pressure sensitive adhesive tape is capable of completely separating from one of said first substrate or said second substrate prior to completely separating from the other of said first substrate or said second substrate.

26. An assembly comprising:

a device for holding an article; and

the stretch releasing pressure sensitive adhesive tape of claim 1 disposed on a surface of said device.

27. The assembly of claim 26, wherein said device is capable of holding an article selected from the group consisting of razor, bottle, bar of soap and combinations thereof.

28. A method of removably bonding the assembly of claim 26 to a substrate, said method comprising

contacting the substrate with said stretch releasing pressure sensitive adhesive tape such that said device is bonded to said substrate through said stretch releasing pressure sensitive adhesive tape and said non-tacky tab is available for grasping by a user.

29. The method of claim 28, wherein said substrate is selected from the group consisting of glass, ceramic, porcelain and combinations thereof.

30. The method of claim 28, wherein said substrate is in a location selected from the group consisting of a refrigerator and a portable cooler.

31. The method of claim 28, further comprising pulling said tab such that said pressure sensitive adhesive tape stretches and releases from at least one of said device and said substrate.

32. A kit comprising:

a device for holding an article; and

the stretch releasing pressure sensitive adhesive tape of claim 1, said tape being capable of forming a bond to a surface of said device and to a substrate.

33. The kit of claim 32, wherein, when said device is bonded to a substrate through said stretch releasing pressure sensitive adhesive tape, said stretch releasing pressure sensitive adhesive tape being capable of completely separating from one of said device or said substrate prior to completely separating from the other of said device or said substrate.

34. A multi-layer stretch releasing pressure-sensitive adhesive tape comprising:

a) a backing comprising a foam substrate;

b) a first pressure-sensitive adhesive composition disposed on a first surface of said backing, said first pressure sensitive adhesive composition having a modulus at 1 radian/second and −

17°

C. of no greater than about 1×

10⁷ Pa and comprising

wa′

) 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,

ii) a polyisocyanate, and

b′

) from about 30% by weight to about 70% by weight MQ resin; and

c) a second pressure-sensitive adhesive composition disposed on a second surface of said backing and

d) a non-tacky tab.