Adhesive composition

• US 20060027321A1
• Filed: 08/09/2004
• Published: 02/09/2006
• Est. Priority Date: 08/09/2004
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Schaffer, Kevin R., Zhu, Dong-Wei
• Application Number:
  US10/914,773
• Publication Number:
  US 20060027321A1
• Time in Patent Office: Days
• US Class Current: 156/330.900
• CPC Class Codes: B32B 2307/40 having particular optical properties light or UV resistant B32B2307/71
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 37/12 characterised by using adhesives

Abstract

The invention relates to an adhesive composition comprising the reaction product of at least one nitrogen-containing polymer and at least one polymerizable ethylenically unsaturated diluent.

Claims

1. An adhesive composition comprising

at least one ethylenically unsaturated polymerizable diluent, and

at least one nitrogen-containing polymer.

2. The adhesive composition of claim 1 wherein the nitrogen-containing polymer is a homopolymer or copolymer of a moderately polar Lewis base-functional copolymerizable monomer.

3. The adhesive composition of claim 1 wherein the nitrogen-containing polymer is soluble in the diluent.

4. The adhesive composition of claim 1 wherein the nitrogen-containing polymer is selected from the group consisting of homopolymers and copolymers of vinylcaprolactam, ethyloxazoline homopolymers, vinylpyrrolidone copolymers, acrylonitrile-styrene copolymers, acrylonitrile-butadiene-styrene copolymers, and copolymers of nitrogen containing acrylates.

5. The adhesive composition of claim 1 wherein the nitrogen-containing polymer is free of ethylenically unsaturated polymerizable groups.

6. The adhesive composition of claim 1 wherein the adhesive composition has a residual nitrogen-containing monomer content of less than 25 ppm.

7. The adhesive composition of claim 1 wherein the ethylenically unsaturated polymerizable diluent comprises at least one (meth)acrylate group.

8. The adhesive composition of claim 1 wherein the ethylenically unsaturated polymerizable diluent is selected from a monomer, an oligomer, a prepolymer and mixtures thereof.

9. The adhesive composition of claim 1 wherein the amount of ethylenically unsaturated polymerizable diluent ranges from about 40 wt-% to about 95 wt-%.

10. The adhesive composition of claim 1 wherein the ethylenically unsaturated polymerizable diluent is monofunctional.

11. The adhesive composition of claim 1 wherein the composition further comprises at least one crosslinking agent.

12. The adhesive composition of claim 1 wherein the adhesive composition further comprises about 0.1 wt-% to about 5 wt-% of photoinitiator.

13. The adhesive composition of claim 1 wherein the adhesive has a refractive index ranging from about 1.50 to 1.55.

14. The adhesive composition of claim 1 wherein the adhesive exhibits a change in b* of less than 2 after accelerated aging.

15. A method of making an article comprising:

applying an adhesive composition to a first substrate wherein the adhesive composition comprises at least one ethylenically unsaturated polymerizable diluent and at least one nitrogen-containing polymer;

contacting the adhesive composition with a second substrate; and

polymerizing the composition such that a bond is formed between the first substrate and second substrate.

16. The method of claim 15 wherein the first and second substrates are independently polymeric films.

17. The method of claim 15 wherein at least one substrate comprises poly(ethylene naphthalate) at least at the surface.

18. The method of claim 15 wherein the adhesive composition further comprises an initiator.

19. The method of claim 15 wherein the composition is polymerized by photocuring.

20. The method of claim 15 wherein the bond exhibits a T-peel of at least about 0.35 lbs/inch width.