Self-wetting adhesive composition

Patent metadata

Field	Value
Publication number	US-11560496-B2
Application number	US-201816487217-A
Country	US
Kind code	B2
Filing date	Feb 19, 2018
Priority date	Feb 20, 2017
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

According to various embodiments of the present disclosure, a composition includes about 5 to about 40 parts by weight of a solute copolymer component. The solute component optionally has one T g or T m of at least 25° C. The composition further includes about 60 to about 95 parts by weight of a solvent monomer. The solvent monomer component includes (meth)acrylate monomers and a multifunctional acrylate. The sum of the solute copolymer component and the solvent monomer component is 100 parts by weight. The composition further includes about 5 to about 100 parts of a plasticizer, relative to the 100 parts.

First claim

The invention claimed is:

1. A composition comprising:
a) about 5 to about 40 parts by weight of a solute copolymer component optionally having one T g or T m of at least 25° C.;
b) about 60 to about 95 parts by weight of a solvent monomer component comprising (meth)acrylate monomers and a multifunctional acrylate, wherein the sum of a) and b) is 100 parts by weight; and
c) about 5 to about 100 parts of a plasticizer, relative to 100 parts a) and b).

2. The composition of claim 1 , wherein the solvent monomer component comprises:
d) about 5 to about 95 parts by weight of low T g monomers;
e) about 0 to about 20 parts of an acid functional monomer;
f) about 0 to about 20 parts of a non-acid functional polar monomer; and
g) about 5 to about 40 parts of a multifunctional acrylate cross-linking agent,
wherein the sum of d) to g) is 100 parts by weight.

3. The composition of claim 1 , wherein the composition is a syrup polymer composition.

4. The composition of claim 3 , wherein the syrup polymer composition has a viscosity of from about 500 to about 10,000 cP at 22° C.

5. The composition of claim 1 , wherein the solute copolymer is selected from a polyurethane, a polyester, a polyvinylpyrrolidone, a poly(methyl methacrylate), a poly(butyl acrylate), a polymer derived from a polyvinyl alcohol and an alkanal, a polyacrylonitrile, a polyolefin, a polyurea, a polybutadiene, a polystyrene, any copolymer thereof, and any combination thereof.

6. The composition of claim 5 , wherein solute copolymer component comprises a poly(vinyl butyral).

7. The composition of claim 1 , wherein the solute copolymer comprises a block copolymer of poly(methyl methacrylate) and poly(n-butyl acrylate).

8. The composition of claim 2 , wherein the solvent monomer comprises about 0 to 15 parts by weight of acid-functional monomer and about 60 to about 90 parts by weight of the low T g monomer.

9. The composition of claim 1 , wherein at the solute copolymer is about 10 parts to about 20 parts by weight of the composition.

10. The composition of claim 2 , wherein at least one of the acid functional monomer in the solvent monomer is at least one of an ethylenically unsaturated carboxylic acid, an ethylenically unsaturated sulfonic acid, an ethylenically, and unsaturated phosphonic acid.

11. The composition of claim 2 , wherein the non-acid functional polar monomer in the solvent monomer is ethylenically unsaturated hydroxyl containing monomer, an ethylenically unsaturated amine containing monomer, or a combination thereof.

12. The composition of claim 2 , wherein the solvent monomer component comprises about 0 to about 15 parts by weight of the non-acid functional polar monomer, and wherein the solvent monomer component comprises about 0 to about 15 parts by weight of the acid-functional monomer.

13. The composition of claim 1 , wherein the composition comprises about 10 to about 80 parts of the plasticizer, relative to 100 parts of a) and b).

14. A film formed from the composition of claim 1 .

15. The film of claim 14 , wherein the film is a cured adhesive film.

16. The cured adhesive film of claim 15 , wherein the film is scratch resistant when subjected to a linear stroke of a stylus of having a speed of at least 0.16 cm/s and a weight applied to the stylus ranges from about 0 grams to about 1500 grams.

17. The cured adhesive film of claim 15 , wherein a 0.5 inch wide by 0.5 inch long sample of the film remains adhered to a substrate for a time ranging from approximately 10 minutes to 40 days when a force ranging from about 2 lbs/in. 2 to about 10 lbs/in 2 is applied to the film.

18. The cured adhesive film of claim 15 , wherein the cured adhesive film is applied to a polarizer.

19. An adhesive article comprising a layer of the cured adhesive film of claim 15 disposed on an optical film.

20. The adhesive article of claim 19 wherein the optical film is at least one of a multilayer optical film and a microstructured optical film.

Assignees

• 3M Innovative Properties Company

Inventors

• Fornof Ann R
• Thomas Carla S
• Whiting Tien Yi T H
• Khodaparast Payam
• Naismith Nathaniel K
• Sitter Brett J
• Thielen James A

Classifications

• C09J4/06

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00 · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C08F220/14

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

• C08K5/0016

  Plasticisers · CPC title

• C08F220/1804

  C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate · CPC title