Ordered architectures in acrylic polymers

Patent metadata

Field	Value
Publication number	US-10011747-B2
Application number	US-201715429287-A
Country	US
Kind code	B2
Filing date	Feb 10, 2017
Priority date	May 19, 2010
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

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.

First claim

What is claimed is:

1. A method of preparing a pressure sensitive adhesive composition, the method comprising:
forming an ordered polymer by living polymerization, whereby the ordered polymer comprises at least two different blocks, including one or more blocks A placed at a first region within the polymer and one or more blocks B placed at a second region within the polymer, and at least one reactive functional group apportioned between the blocks A and B wherein an amount of the at least one reactive functional group in both blocks A and B is apportioned between the blocks A and B in an apportionment ratio of from about 6:1 to about 10,000:1;
crosslinking the ordered polymer by mixing the ordered polymer with an amount of a crosslinking agent;
drying the crosslinked ordered polymer,
wherein the first region is an end region of the polymer and the second region is a middle region of the polymer.

2. The method of claim 1 wherein the apportionment ratio is within the range of from 6:1 to 1,000:1.

3. The method of claim 1 wherein the apportionment ratio is within the range of from 6:1 to 100:1.

4. The method of claim 1 wherein the polymer has a number average molecular weight of from about 10,000 to about 300,000.

5. The method of claim 1 wherein the polymer has a number average molecular weight of from about 50,000 to about 200,000.

6. The method of claim 1 wherein the polymer has a number average molecular weight of from about 100,000 to about 150,000.

7. The method of claim 1 wherein the amount of the crosslinking agent is from 0.05% to 5%.

8. The method of claim 1 wherein the amount of the crosslinking agent is from 0.075% to 2%.

9. The method of claim 1 wherein the amount of the crosslinking agent is from 0.1% to 1.5%.

Assignees

• Avery Dennison Corp

Inventors

• Miller Brandon S
• Heimbach Kyle R
• Bottorf William L
• Lester Christopher L
• Bartholomew Eric L

Classifications

• C08F2438/03

  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 title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• C08F293/005 Primary

  using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent · CPC title

• C09J2467/006

  in the substrate · CPC title

• C08F220/06

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title