Ordered Architectures in Acrylic Polymers

• US 20130059971A1
• Filed: 05/17/2011
• Published: 03/07/2013
• Est. Priority Date: 05/19/2010
• Status: Active Grant

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Miller, Brandon S., Heimbach, Kyle R., Bottorf, William L., Lester, Christopher, Bartholomew, Eric L.
• Granted Patent: US 9,644,063 B2
• Time in Patent Office: Days
• US Class Current: 524/553
• CPC Class Codes: C08F 2438/03 Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]
• CPC Class Codes: C08F 293/005 using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
• CPC Class Codes: C09J 153/00 Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 153/005 Modified block copolymers

Abstract

Polymers having ordered architectures and one or more reactive functional groups incorporated in select blocks or regions of the polymer in particular proportions relative to other regions in the polymer, are described. The polymers are well suited for use in adhesive compositions, and particularly for pressure sensitive adhesive compositions. In addition, various methods for forming the noted polymers and adhesive compositions utilizing the ordered polymers are disclosed.

Claims

1. An ordered polymer comprising at least two different blocks and at least one reactive functional group apportioned between the at least two blocks in an apportionment ratio of from about 1.1:

1 to about 10,000;

1.

2. The ordered polymer of claim 1 wherein the apportionment ratio is from 1.1:

1 to 1,000;

1.

3. The ordered polymer of claim 1 wherein the apportionment ratio is from 1.1:

1 to 100;

1.

4. The ordered polymer of claim 1 wherein the at least two different blocks include a first block selected from the group consisting of acrylate monomers, methacrylate monomers, and combinations thereof;

and a second block including a polymerizable acrylate comonomer, the first and second blocks including at least one reactive functional group selected from the group consisting of acrylonitrile groups, acrylamide groups, methacrylamide groups, vinyl ester groups, vinyl ether groups, vinyl amide groups, vinyl ketone groups, styrene groups, halogen-containing groups, ionic groups, acid-containing groups, base-containing groups, olefin groups, silane groups, epoxy groups, hydroxyl groups, anhydride groups, silyl groups, carboxyl groups, carbonyl groups, carbonate ester groups, isocyanato groups, amino groups, amide groups, imide groups, mercapto groups, acetoacetyl groups, and combinations thereof.

5. The ordered polymer of claim 1 wherein the polymer has a molecular weight of from about 10,000 to about 300,000.

6. The ordered polymer of claim 1 wherein the polymer has a molecular weight of from about 50,000 to about 200,000.

7. The ordered polymer of claim 1 wherein the polymer has a molecular weight of from about 100,000 to about 150,000.

8. An adhesive composition comprising an ordered polymer including at least two different blocks and at least one reactive functional group apportioned between the at least two blocks in an apportionment ratio of from about 1.1:

1 to about 10,000;

1.

9. The adhesive composition of claim 8 wherein the apportionment ratio is from 1.1:

1 to 1,000;

1.

10. The adhesive composition of claim 8 wherein the apportionment ratio is from 1.1:

1 to 100;

1.

11. The adhesive composition of claim 8 wherein the at least two different blocks include a first block selected from the group consisting of acrylate monomers, methacrylate monomers, and combinations thereof;

and a second block including a polymerizable acrylate comonomer, the first and second blocks including at least one reactive functional group selected from the group consisting of acrylonitrile groups, acrylamide groups, methacrylamide groups, vinyl ester groups, vinyl ether groups, vinyl amide groups, vinyl ketone groups, styrene groups, halogen-containing groups, ionic groups, acid-containing groups, base-containing groups, olefin groups, silane groups, epoxy groups, hydroxyl groups, anhydride groups, silyl groups, carboxyl groups, carbonyl groups, carbonate ester groups, isocyanato groups, amino groups, amide groups, imide groups, mercapto groups, acetoacetyl groups, and combinations thereof.

12. The adhesive composition of claim 8 wherein the polymer has a molecular weight of from about 10,000 to about 300,000.

13. The adhesive composition of claim 8 wherein the polymer has a molecular weight of from about 50,000 to about 200,000.

14. The adhesive composition of claim 8 wherein the polymer has a molecular weight of from about 100,000 to about 150,000.

15. The adhesive composition of claim 8 wherein the composition further comprises at least one agent selected from the group consisting of tackifiers, plasticizers, antioxidants, pH controllers, medicaments, bactericides, growth factors, wound healing components, deodorants, perfumes, antimicrobials, fungicides, cutting agents, pigments, filler, diluents, flame retardants, and combinations thereof.

16. A method of preparing an adhesive composition, the method comprising:

forming an ordered polymer by living polymerization whereby the ordered polymer comprises at least two different blocks and at least one reactive functional group apportioned between the at least two blocks in an apportionment ratio of from about 1.1;

1 to about 10,000;

1;

crosslinking the ordered polymer by mixing the ordered polymer with an effective amount of a crosslinking agent;

drying the crosslinked ordered polymer.

17. The method of claim 16 wherein the apportionment ratio is within the range of from 1.1:

1 to 1,000;

1.

18. The method of claim 16 wherein the apportionment ratio is within the range of from 1.1:

1 to 100;

1.

19. The method of claim 16 wherein the polymer has a molecular weight of from about 10,000 to about 300,000.

20. The method of claim 16 wherein the polymer has a molecular weight of from about 50,000 to about 200,000.

21. The method of claim 16 wherein the polymer has a molecular weight of from about 100,000 to about 150,000.

22. The method of claim 16 wherein the effective amount of the crosslinking agent is from 0.05% to 5%.

23. The method of claim 16 wherein the effective amount of the crosslinking agent is from 0.075% to 2%.

24. The method of claim 16 wherein the effective amount of the crosslinking agent is from 0.1% to 1.5%.