On demand radiation induced constructive and deconstructive chemical reactions

Patent metadata

Field	Value
Publication number	US-9676918-B2
Application number	US-201615183110-A
Country	US
Kind code	B2
Filing date	Jun 15, 2016
Priority date	Aug 6, 2007
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A method is provided for de-bonding objects contained in an article at an interface between the objects, wherein the objects are joined at the interface through an intermediate layer, which involves applying energy from a radiation source, wherein the energy is sufficient to cause destruction of bonds within the intermediate layer; and separating the two objects from one another.

First claim

The invention claimed is:

1. A method for de-bonding objects contained in an article at an interface between the objects, wherein the objects are joined at the interface through an intermediate layer, wherein the intermediate layer is at least one primer layer at an interface between at least one of the objects and a further bonding layer between the objects, comprising:
applying energy from a radiation source, wherein the energy is sufficient to cause destruction of bonds within the intermediate layer, wherein the radiation source is one or more energy modulation agents contained within the at least one primer layer, wherein the one or more energy modulation agents convert an externally applied energy into the energy sufficient to cause destruction of bonds within the at least one primer layer, or between the at least one primer layer and the further bonding layer; and
separating the two objects from one another.

2. The method of claim 1 , wherein the further bonding layer is an adhesive layer used to join the objects together, wherein the adhesive layer is formed from a curable adhesive composition comprising one or more curable monomers and one or more energy modulation agents.

3. The method of claim 2 , wherein the adhesive layer is formed by applying an applied energy to the curable adhesive composition, whereby the one or more energy modulation agents convert the applied energy into an initiation energy which initiates polymerization of the one or more monomers and thus cause curing of the curable adhesive composition.

4. The method of claim 3 , wherein the applied energy is a first ionizing radiation.

5. The method of claim 4 , wherein the ionizing radiation is at least one member selected from the group consisting of x-rays, gamma rays, and electron beams.

6. The method of claim 3 , wherein the first ionizing radiation is x-rays.

7. The method of claim 6 , wherein the first ionizing radation x-rays have an energy of from 1 kV to 200 kV.

8. The method of claim 3 , wherein the radiation source is the one or more energy modulation agents contained within the adhesive layer, wherein the one or more energy modulation agents convert an externally applied energy into the energy sufficient to cause destruction of bonds within the adhesive layer.

9. The method of claim 8 , wherein the externally applied energy is a second ionizing radiation.

10. The method of claim 9 , wherein the second ionizing radiation is a member selected from the group consisting of x-rays, gamma rays, and electron beams.

11. The method of claim 9 , wherein the second ionizing radiation is x-rays, and the one or more energy modulation agents convert the second ionizing radiation into UV energy sufficient to cause destruction of bonds wtihin the adhesive layer.

12. The method of claim 11 , wherein the second ionizing radiation x-rays have an energy of 1 MV or higher.

13. The method of claim 1 , wherein the externally applied energy is an ionizing radiation.

14. The method of claim 13 , wherein the ionizing radiation is a member selected from the group consisting of x-rays, gamma rays, and electron beams.

15. The method of claim 13 , wherein the ionizing radiation is x-rays, and the one or more energy modulation agents convert the ionizing radiation into UV energy sufficient to cause destruction of bonds within the at least one primer layer, or between the at least one primer layer and the further bonding layer.

16. The method of claim 15 , wherein the x-rays have an energy of 1 MV or higher.

17. The method of claim 1 , wherein the at least one primer layer comprises primer layers on each of the objects at an interface with each of the objects and the further bonding layer.

18. A method for de-bonding objects contained in an article at an interface between the objects, wherein the objects are joined at the interface through an intermediate layer, comprising:
applying energy from a radiation source, wherein the energy is sufficient to cause destruction of bonds within the intermediate layer, wherein the applying energy is performed while the article is immersed in a chemical digestion bath comprising a medium and an acid compound; and
separating the two objects from one another.

19. The method of claim 18 , wherein the applying energy is performed while the article is heated to a temperature of from room temperature to 200° C.

20. The method of claim 18 , wherein the immersed article is also heated to a temperature of from room temperature to 200° C.

21. The method of claim 18 , wherein the radiation source is a source of x-rays, e-beams or UV radiation.

22. The method of claim 18 , wherein the radiation source is one or more energy modulation agents contained within the intermediate layer, wherein the one or more energy modulation agents convert an externally applied energy into the energy sufficient to cause destruction of bonds within the intermediate layer.

23. The method of claim 22 , wherein the externally applied energy is an ionizing radiation.

24. The method of claim 23 , wherein the ionizing radiation is a member selected from the group consisting of x-rays, gamma rays, and electron beams.

25. The method of claim 23 , wherein the ionizing radiation is x-rays, and the energy modulation agent converts the ionizing radiation into UV energy sufficient to cause destruction of bonds within the intermediate layer.

26. The method of claim 25 , wherein the x-rays have an energy of 1 MV or higher.

27. The method of claim 18 , wherein the intermediate layer is an adhesive layer used to join the objects together, wherein the adhesive layer is formed from a curable adhesive composition comprising one or more curable monomers and one or more energy modulation agents.

28. The method of claim 27 , wherein the adhesive layer is formed by applying an applied energy to the curable adhesive composition, whereby the one or more energy modulation agents convert the applied energy into an initiation energy which initiates polymerization of the one or more monomers and thus cause curing of the curable adhesive composition.

29. The method of claim 28 , wherein the applied energy is a first ionizing radiation.

30. The method of claim 29 , wherein the ionizing radiation is at least one member selected from the group consisting of x-rays, gamma rays, and electron beams.

31. The method of claim 30 , wherein the first ionizing radiation is x-rays.

32. The method of claim 31 , wherein the first ionizing radation x-rays have an energy of from 1 kV to 200 kV.

33. The method of claim 28 , wherein the radiation source is the one or more energy modulation agents contained within the adhesive layer, wherein the one or more energy modulation agents convert an externally applied energy into the energy sufficient to cause destruction of bonds within the adhesive layer.

34. The method of claim 33 , wherein the externally applied energy is a second ionizing radiation.

35. The method of claim 34 , wherein the second ionizing radiation is a member selected from the group consisting of x-rays, gamma rays, and electron beams.

36. The method of claim 34 , wherein the second ionizing radiation is x-rays, and the one or more energy modulation agents convert the second ionizi

Assignees

• Immunolight Llc

Inventors

• Fathi Zakaryae
• Pacanovsky John
• Bourke Jr Frederic A

Classifications

• Y10T156/1153

  Temperature change for delamination [e.g., heating during delaminating, etc.] · CPC title

• B32B43/006

  Delaminating · CPC title

• C08J11/10 Primary

  by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation (depolymerisation to the original monomer C07) · CPC title

• C08J2321/00

  Characterised by the use of unspecified rubbers · CPC title

• B32B38/10

  Removing layers, or parts of layers, mechanically or chemically · CPC title