Ionomeric polyester-based pressure sensitive adhesives

Patent metadata

Field	Value
Publication number	US-12435247-B2
Application number	US-202017770092-A
Country	US
Kind code	B2
Filing date	Nov 11, 2020
Priority date	Nov 15, 2019
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

Polyester compositions are the reaction product of a reaction mixture including at least two different diacids, and at least two different diols. At least one diacid or diol has at least one pendant ethylenically unsaturated group, and at least one diacid or diol has at least one pendant ionic group. The polyester composition has a glass transition temperature in a range of −60° C. to 12° C., and is a vibration-damping, pressure sensitive adhesive.

First claim

What is claimed is:

1. An adhesive article comprising:
a first carrier layer with a first major surface and a second major surface; and
a first polyester-based ionomeric adhesive layer with a first major surface and a second major surface, wherein the first major surface of the first polyester-based ionomeric adhesive layer is in contact with the second major surface of the first carrier layer, and

wherein the polyester-based adhesive layer comprises:
a polyester composition comprising the reaction product of a reaction mixture comprising:
at least two different diacids;
at least two different diols;
wherein at least one diacid or diol has at least one pendant ethylenically unsaturated group, and
wherein at least one diacid or diol has at least one pendant ionic group;

wherein the polyester composition has a glass transition temperature in a range of 60° C. to 12° C., and
wherein the polyester composition is a vibration-damping, pressure sensitive adhesive, and further comprising a film substrate with a first major surface and a second major surface, wherein the second major surface of the first polyester-based ionomeric adhesive layer is in contact with the first major surface of the film substrate.

2. The adhesive article of claim 1 , wherein the at least one diacid or diol with at least one pendant ionic group comprises 0.001-20 mole % of the total diacid and diol reaction mixture.

3. The adhesive article of claim 1 , wherein the at least one diacid or diol with at least one pendant ionic group comprises a sulfonated diacid or diol.

4. The adhesive article of claim 3 , wherein the at least one diacid or diol with at least one pendant ionic group comprises a sulfonated aromatic diacid or diol.

5. The adhesive article of claim 1 , wherein the at least one diacid or diol with at least one pendant ethylenically unsaturated group comprises 0.001-10 mole % of the total diacid and diol reaction mixture.

6. The adhesive article of claim 1 , wherein vibration-damping, as measured by dynamic mechanical analysis (DMA), comprises a Tan δ of 1.0-3.0, wherein Tan δ is the tangent of the phase angle and the ratio of G″/G′.

7. The adhesive article of claim 1 , wherein the pressure sensitive adhesive is optically transparent having a luminous visible light transmission of at least 80%, and a haze of less than 10%, or optically clear having a luminous visible light transmission of at least 90%, and a haze of less than 5%.

8. The adhesive article of claim 1 , wherein the polyester is substantially amorphous with a heat of melting (ΔH m ) as determined by DSC (Differential Scanning calorimetry) of less than 5 Joules/gram.

9. The adhesive article of claim 1 , wherein the polyester has an intrinsic viscosity of less than 1.2.

10. The adhesive article of claim 1 , wherein the first carrier layer comprises a polymeric film or a release liner.

11. The adhesive article of claim 1 , wherein the film substrate comprises a monolithic or multi-layer optical film.

12. The adhesive article of claim 1 , further comprising a second polyester-based ionomeric adhesive layer with a first major surface and a second major surface, wherein the first major surface of the second polyester-based ionomeric adhesive layer is in contact with the second major surface of the film substrate.

13. The adhesive article of claim 12 , further comprising a second carrier layer with a first major surface and a second major surface, wherein the first major surface of the second carrier layer is in contact with the second major surface of the second polyester-based ionomeric adhesive layer.

14. An adhesive laminate article comprising:
a first substrate with a first major surface and a second major surface;
a first polyester-based ionomeric adhesive layer with a first major surface and a second major surface, wherein the second major surface of the first substrate is in contact with the first major surface of the first polyester-based ionomeric adhesive layer; and
a second substrate with a first major surface and a second major surface, wherein the second major surface of the first polyester-based ionomeric adhesive layer is adjacent to the first major surface of the second substrate, and wherein the first polyester-based ionomeric adhesive layer comprises:
a polyester composition comprising the reaction product of a reaction mixture comprising:
at least two different diacids;
at least two different diols;
wherein at least one diacid or diol has at least one pendant ethylenically unsaturated group, and
wherein at least one diacid or diol has at least one pendant ionic group;

wherein the polyester composition has a glass transition temperature in a range of 60° C. to 12° C., and
wherein the polyester composition is a vibration-damping, pressure sensitive adhesive.

15. The adhesive laminate article of claim 14 , wherein the pressure sensitive adhesive is optically transparent and the first and second substrates comprise optically transparent substrates.

16. The adhesive laminate article of claim 15 , wherein the first and second optically transparent substrates are selected from glass, laminated glass, PMMA (polymethylmethacrylate), PC (polycarbonate), PET (polyethylene terephthalate), PVB (polyvinyl butyral), or a combination thereof.

17. The adhesive laminate article of claim 14 , further comprising:
a film substrate with a first major surface and a second major surface, wherein the first major surface of the film substrate is in contact with the second major surface of the first polyester-based ionomeric adhesive layer; and
a second polyester-based ionomeric adhesive layer with a first major surface and a second major surface, wherein the first major surface of the second polyester-based ionomeric adhesive layer is in contact with the second major surface of the film substrate, and wherein the second major surface of the second polyester-based ionomeric adhesive layer is in contact with the first major surface of the second substrate.

18. The adhesive laminate article of claim 17 , wherein the film substrate comprises a monolithic or multi-layer optical film.

19. The laminate article of claim 17 , wherein the first and second polyester-based ionomeric adhesive layers comprise the same polyester-based ionomeric adhesive layer and each has a thickness of 25-7,620 micrometers (1-300 mils).

Assignees

• 3M Innovative Properties Company

Inventors

• Liu Richard Y

Classifications

• G10K11/168

  Plural layers of different materials, e.g. sandwiches · CPC title

• C09J2467/00

  Presence of polyester · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title