Granted Patent B2

US 12,735,611 · App. 18/579,545 · Granted Sep 15, 2026

Inventors: Adam O. Moughton (Minneapolis, MN); Kathleen S. Shafer (Woodbury, MN); Andrew Satrijo (St. Paul, MN); Michael J. Maher (St. Paul, MN); Deborah K. Schneiderman (St. Paul, MN)

Assignee: 3M Innovative Properties Company

C09J133/08B32B7/12C08F220/285C08K5/0025C08K5/36C08L33/08C08L53/00C08L63/00C09J7/40C09J163/00C08L2205/025C09J2203/326C09J2301/408C09J2433/00C09J2453/00C09J2463/00

Abstract

Claims (25)

1 . A curable composition comprising:

a) a (meth)acrylic-based multiblock copolymer;

b) a random (meth)acrylate copolymer comprising monomeric units having a pendant poly(alkylene oxide) group, wherein the monomeric unit having the pendant poly(alkylene oxide) group has a number average molecular weight of at least 300 Daltons;

c) an epoxy resin; and

d) a cationic photoinitiator.

2 . The curable composition of claim 1 , wherein the (meth)acrylic-based multiblock copolymer is a triblock copolymer of formula A-B-A where A blocks phase separate from the B block.

3 . The curable composition of claim 2 , wherein each A block comprises monomeric units derived from methyl methacrylate and the B block comprises monomeric units derived from n-butyl (meth)acrylate.

4 . The curable composition of claim 1 , wherein the curable composition comprises 5 to 60 weight percent of the (meth)acrylic-based multiblock copolymer based on a total weight of resin components in the curable composition.

5 . The curable composition of claim 1 , wherein the pendant (alkylene oxide) group on the random (meth)acrylate copolymer is a poly(ethylene oxide) group, a poly(propylene oxide) group, a poly(tetramethylene oxide) group, or a copolymer thereof.

6 . The curable composition of claim 1 , wherein the random (meth)acylate copolymer is crosslinked.

7 . The curable composition of claim 1 , wherein the curable composition comprises 30 to 85 weight percent random (meth)acrylate copolymer based on a total weight of resin components in the curable composition.

8 . The curable composition of claim 1 , wherein the curable composition comprises 10 to 50 weight percent epoxy resin based on a total weight of the resin components in the curable composition.

9 . The curable composition of claim 1 , wherein the curable composition is free or contains less than 0.1 weight percent of a liquid polyether polyol based on a total weight of resin components in the curable composition.

10 . The curable composition of claim 1 , wherein the random (meth)acrylate copolymer consists of monomeric units derived from a) a (meth)acrylate macromer having a pendent poly(alkylene oxide) group, wherein the pendant poly(alkylene oxide) group is the pendant poly(alkylene oxide) group of claim 1 ; b) an alkyl (meth)acrylate; and c) optionally at least one polar monomer that is free of an acidic group and free of a nitrogen-containing group.

11 . A first article comprising:

a curable composition according to claim 1 ; and

a first substrate or a first release liner positioned adjacent to a first surface of the curable composition.

12 . The first article of claim 11 , wherein the article comprises the curable composition, the first release liner positioned adjacent to the first surface of the curable composition, and a second release liner positioned adjacent to a second surface of the curable composition opposite the first release liner.

13 . The first article of claim 11 , wherein the first article is in a roll.

14 . The first article of claim 11 , wherein the first article is a die-cut part suitable for adhering a first component to a second component.

15 . A cured composition comprising a reaction product of the curable composition of claim 1 .

16 . A second article comprising:

a first substate;

a second substrate; and

the cured composition of claim 15 positioned between the first substrate and the second substrate, wherein the first substate is bonded to the second substrate with the cured composition.

Assignments (1)

Continuity (2)

References Cited (47)