Stretch releasing pressure sensitive adhesive tape and articles

• US 6,569,521 B1
• Filed: 07/06/2000
• Issued: 05/27/2003
• 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: Sheridan, Margaret M., Malmer, Jeffrey D., Sherman, Audrey A., Kinning, David J., Bries, James L.
• Primary Examiner(s): ZIRKER, DANIEL R
• Application Number:
  US09/612,341
• Time in Patent Office: 1,055 Days
• Field of Search: 248/205.3, 248/304, 428/343, 428/40.1, 428/351, 428/447, 528/14
• 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 adhesive tape comprising

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,

said pressure sensitive adhesive composition comprising

a. silicone polyurea block copolymer comprising the reaction product of

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

ii) polyisocyanate, and

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

a non-tacky tab.

2. The tape of claim 1, wherein said pressure sensitive adhesive composition comprises a silicone polymer selected from the group consisting of silicone polyurea block copolymers, polydiorganosiloxane polymers, and mixtures thereof.

3. 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.

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

5. The tape of claim 3, wherein said polydiorganosiloxane diamine has a molecular weight of from about 10,000 g/mole to about 65,000 g/mole.

6. The tape of claim 3, wherein said polydiorganosiloxane diamine has a molecular weight of from about 25,000 g/mole to about 50,000 g/mole.

7. The tape of claim 3, 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.

8. The tape of claim 3, 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.

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

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

11. The tape of claim 3, wherein said pressure sensitive adhesive composition comprises from about40% by weight to about 60% by.

12. The tape of claim 3, wherein said pressure sensitive adhesive composition comprises from about 45% by weight to about 55% by weight MQ resin.

13. 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.

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 32.8 N/dm.

15. 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 1×

10⁷ Pa.

16. 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.

17. 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.

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

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

20. The tape of claim 19, wherein said backing is selected from the group consisting of elastic backings, highly extensible backings, and substantially inelastic backings, and combinations thereof.

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

22. The tape of claim 19, wherein said backing comprises a layer of polymeric film and a layer of polymeric foam.

23. The tape of claim 19, 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.

24. The tape of claim 19, wherein said backing comprises a treated surface, said pressure sensitive adhesive composition being disposed on said treated surface of said backing and exhibiting a greater adhesion to said treated backing relative to an untreated backing.

25. The tape of claim 19, further comprising a primer composition disposed between said pressure sensitive adhesive composition and said backing.

26. The tape of claim 19, 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.

27. 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.

28. 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.

29. The assembly of claim 28, wherein said device is capable of holding an article selected from the group consisting of razor, bottle, bar of soap and combinations thereof.

30. A method of removably bonding the assembly of claim 28 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.

31. The method of claim 30, wherein said substrate is selected from the group consisting of glass, ceramic, porcelain and combinations thereof.

32. The method of claim 30, wherein said substrate is disposed in a high humidity environment.

33. The method of claim 30, wherein said substrate is in a location selected from the group consisting of a shower, a steam room, a bathtub, and a refrigerator.

34. A kit comprising:

a device for holding an article; and

a stretch releasing pressure sensitive adhesive tape capable of forming a bond to a surface of said device and to a substrate,

said tape comprising 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,

said pressure sensitive adhesive composition comprising

a. silicone polyurea block copolymer comprising the reaction product of

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

ii) polyisocyanate, and

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

35. The kit of claim 34 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.

36. A stretch releasing adhesive article comprising:

an extensible backing; and

a silicone pressure sensitive adhesive composition disposed on a first major surface of said backing, said silicone pressure sensitive adhesive composition exhibiting a 180°

peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm, said silicone pressure sensitive adhesive composition comprising

a. silicone polyurea block copolymer comprising the reaction product of

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

ii) polyisocyanate, and

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

37. The stretch releasing adhesive article of claim 36, wherein said extensible backing comprises foam.

38. The stretch releasing adhesive article of claim 37, further comprising a pressure sensitive adhesive composition disposed on a second major surface of said backing, said second major surface being opposite said first major surface.

39. The stretch releasing adhesive article of claim 38, further comprising a pressure sensitive adhesive composition disposed on a second major surface of said backing, said second major surface being opposite said first major surface.

40. The stretch releasing adhesive article of claim 37, further comprising a non-tacky tab.

41. The stretch releasing adhesive article of claim 38, further comprising a non-tacky tab.

42. The stretch releasing adhesive article of claim 39, further comprising a non-tacky tab.