Granted Patent B2

US 12,570,875 · App. 18/007,154 · Granted Mar 10, 2026

Inventors: Deborah K. Schneiderman (St. Paul, MN); Michael J. Maher (St. Paul, MN); Adam O. Moughton (Minneapolis, MN); Jennifer J. Sahlin (Minneapolis, MN)

Assignee: 3M Innovative Properties Company

C09J7/385C09J133/10C09J2203/326C09J2301/302C09J2301/312

Abstract

Claims (34)

1 . An adhesive composition comprising:

(a) 0.5 to 20 weight percent of a first (meth) acrylate polymer based on a total weight of (meth) acrylate polymers in the adhesive composition, wherein the first (meth) acrylate polymer has a weight average molecular weight of at least 300,000 Daltons and is a polymerized product of a first polymerizable composition comprising (1) an alkyl (meth) acrylate and (2) an optional polar monomer; and

(b) 80 to 99.5 weight percent of a second (meth) acrylate polymer based on the total weight of (meth) acrylate polymers in the adhesive composition, wherein the second (meth) acrylate polymer is crosslinked and is a polymerized product of a second polymerizable composition comprising (1) an alkyl (meth) acrylate, (2) a polar monomer, (3) a poly (tetrahydrofuran) (meth) acrylate macromer, and (4) a crosslinking monomer having a plurality of (meth) acryloyl groups.

2 . The adhesive composition of claim 1 , wherein the first polymerizable composition comprises 60 to 99 weight percent alkyl (meth) acrylate and 1 to 40 weight percent polar monomer based on a total weight of polymerizable components in the first polymerizable composition.

3 . The adhesive composition of claim 2 , wherein the polar monomer comprises 1 to 15 weight percent of an acidic polar monomer and 0 to 25 weight percent of a non-acidic polar monomer based on a total weight of polymerizable components in the first polymerizable composition.

4 . The adhesive composition of claim 1 , wherein the second polymerizable composition comprises 25 to 95 weight percent alkyl (meth) acrylate, 0.5 to 40 weight percent polar monomers, 2 to 50 weight percent poly (tetrahydrofuran) (meth) acrylate macromer, and 0.01 to 5 weight percent crosslinking monomer having a plurality of (meth) acryloyl groups based on a total weight of polymerizable components in the second polymerizable composition.

5 . The adhesive composition of claim 1 , wherein the poly (tetrahydrofuran) (meth) acrylate macromer has a weight average molecular weight in a range of 500 to 12,000 Daltons.

6 . The adhesive composition of claim 1 , wherein the adhesive composition comprises 5 to 20 weight percent first (meth) acrylate polymer and 80 to 95 weight percent second (meth) acrylate polymer based on the total weight of (meth) acrylate polymers in the adhesive composition.

7 . The adhesive composition of claim 1 , wherein the adhesive composition is a pressure-sensitive adhesive.

8 . An article comprising:

a) a substrate; and

b) an adhesive composition of claim 1 positioned adjacent to the substrate.

9 . The article of claim 8 , wherein the article is a transfer tape, a one-sided adhesive tape, a dual-sided adhesive tape, or a die-cut adhesive article.

10 . The article of claim 8 , wherein the article is an electronic device incorporating the adhesive composition.

11 . A method of making an adhesive composition, the method comprising:

(a) providing a first polymerizable composition comprising:

(1) an alkyl (meth) acrylate; and

(2) an optional polar monomer;

(b) forming a syrup composition by partially polymerizing the first polymerizable composition, wherein the syrup composition comprises

(1) 1 to 20 weight percent of solute polymer based on a total weight of the syrup composition, the solute polymer being a first (meth) acrylate polymer having a weight average molecular weight of at least 300,000 Daltons;

(2) 80 to 99 weight percent of solvent monomers based on a total weight of the syrup, the solvent monomers comprising (i) the alkyl (meth) acrylate and (ii) the optional polar monomer; and

(c) preparing a second polymerizable composition comprising

(1) the syrup composition;

(2) a polar monomer if the syrup composition is free of the optional polar monomer;

(3) a poly (tetrahydrofuran) (meth) acrylate macromer; and

(4) a crosslinking monomer having a plurality of (meth) acryloyl groups

(d) polymerizing the second polymerizable composition to form the adhesive composition comprising (1) the first (meth) acrylate polymer and (2) a second (meth) acrylate polymer that is crosslinked.

12 . An adhesive composition comprising a polymerized product of:

(a) a syrup composition comprising a partially polymerized product of a first polymerizable composition comprising (i) an alkyl (meth) acrylate and (ii) an optional polar monomer, wherein the syrup composition comprises

(1) 1 to 20 weight percent solute polymer based on a total weight of the syrup, the solute polymer being a first (meth) acrylate polymer having a weight average molecular weight of at least 300,000 Daltons; and

(2) 80 to 99 weight percent solvent monomers based on a total weight of the syrup, the solvent monomers comprising (i) the alkyl (meth) acrylate and (ii) the optional polar monomer; and

(b) a polar monomer if the syrup composition is free of the optional polar monomer; and

(c) a poly (tetrahydrofuran) (meth) acrylate macromer; and

(d) a crosslinking monomer having a plurality of (meth) acryloyl groups.

Assignments (1)

Continuity (2)

References Cited (27)