Adhesive compositions and articles, and methods of making and using the same

Patent metadata

Field	Value
Publication number	US-10246616-B2
Application number	US-201715615425-A
Country	US
Kind code	B2
Filing date	Jun 6, 2017
Priority date	Dec 28, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

An adhesive composition includes a first acrylic polymer preparable from first components and a second acrylic polymer. The first components comprising i) a branched first alkyl (meth)acrylate having from 4 to 22 carbon atoms, and ii) at least one of acrylic acid and methacrylic acid. The second acrylic polymer is preparable from second components comprising iii) at least one second alkyl (meth)acrylate having from 4 to 22 carbon atoms, iv) a (meth)acrylamide represented by the formula

wherein R 1 is H or methyl, and R 2 and R 3 each independently represents H or an alkyl group having from 1 to 8 carbon atoms, or taken together R 2 and R 3 may form a divalent alkylene group having from 4 to 6 carbon atoms, and v) at least one high T g macromer having a terminal free-radically polymerizable unsaturated group, the high T g macromer having a T g of at least 45° C. Based on the combined total weight of the at least one first acrylic polymer and the at least one second acrylic polymer, the at least one second acrylic polymer is present at a level of from 5 to 40 percent by weight. Methods of making the adhesive composition are also disclosed.

First claim

What is claimed is:

1. An adhesive composition comprising a polymerized reaction product of components comprising:
a) first components of a first acrylic polymer comprising:
i) at least one alkyl (meth)acrylate having from 4 to 22 carbon atoms;
ii) at least one of acrylic acid and methacrylic acid;

b) at least one second acrylic polymer prepared by polymerization of second components comprising:
iii) at least one alkyl (meth)acrylate having from 4 to 22 carbon atoms;
iv) at least one (meth)acrylamide represented by the formula

wherein R 1 is H or methyl; and

R 2 and R 3 independently represents H or an alkyl group having from 1 to 8 carbon atoms, or taken together R 2 and R 3 may form a divalent alkylene group having from 4 to 6 carbon atoms; and
v) at least one high T g macromer having a terminal free-radically polymerizable unsaturated group, wherein the high T g macromer has a T g of at least 45° C.; and

wherein, based on the combined total weight of the components a) and b), second acrylic polymer b) is present at a level of from 5 to 40 percent by weight.

2. The adhesive composition of claim 1 , wherein the high T g macromer has a T g of at least 80° C.

3. The adhesive composition of claim 1 , wherein the at least one high T g macromer comprises a polymethyl methacrylate macromer having a terminal free-radically polymerizable unsaturated group.

4. The adhesive composition of claim 1 , wherein based on the total weight of components i) and ii), the first components comprise:
85 to 99 percent by weight of first component i); and
1 to 15 percent by weight of first component ii).

5. The adhesive composition of claim 1 , wherein based on the total weight of the components iii), iv), and v), the second acrylic polymer comprises:
30 to 94 percent by weight of second component iii);
1 to 10 percent by weight of second component iv); and
5 to 60 percent by weight of second component v).

6. The adhesive composition of claim 1 , wherein based on the total weight of the adhesive composition, the macromer comprises from 1 to 15 percent by weight of the adhesive composition.

7. An extrudable adhesive pouch comprising the adhesive composition of claim 1 , sealed within a thermoplastic pouch.

8. The extrudable adhesive pouch of claim 7 , wherein the thermoplastic pouch comprises an ethylene-vinyl acetate copolymer.

Assignees

• 3M Innovative Properties Co

Inventors

• Yarusso David J
• Tran Thu-Van T
• Kim Soyoung
• Behling Ross E
• Benson Karl E

Classifications

• C09J133/10 Primary

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L23/02

  not modified by chemical after-treatment · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L2205/05

  containing polymer components which can react with one another · CPC title