Granted Patent B2

US 12,325,813 · App. 17/822,125 · Granted Jun 10, 2025

Inventors: Yao Yu Wang (Guangdong, CN); Liping Liu (Guangdong, CN); Huiyi Zhong (Guangdong, CN)

Assignees: Interface Technology (ChengDu) Co., Ltd.; Interface Optoelectronics (ShenZhen) Co., Ltd.; General Interface Solution Limited

C09J7/10C09J7/385C09J11/06C09J2301/416C09J2409/00C09J2433/00

Abstract

Claims (25)

1. An optical clear adhesive composition, comprising:

a first polydiene having a first weight average molecular weight of 500 Da to 1500 Da;

a second polydiene having a second average molecular weight of 50000 Da to 110000 Da;

a plurality of acrylate monomers comprising at least two different hydroxyacrylates; and

a photoinitiator.

2. The optical clear adhesive composition of claim 1 , wherein a mass ratio of the first polydiene to the second polydiene is 1:7 to 1:9.

3. The optical clear adhesive composition of claim 1 , wherein the first polydiene and the second polydiene account for 30 wt % to 60 wt % in the optical clear adhesive composition, the acrylate monomers account for 35 wt % to 65 wt % in the optical clear adhesive composition, and the photoinitiator accounts for 0.1 wt % to 5 wt % in the optical clear adhesive composition.

4. The optical clear adhesive composition of claim 1 , wherein the first polydiene comprises polyisoprene, polybutadiene, or a combination thereof, and the second polydiene comprises polyisoprene, polybutadiene, or a combination thereof.

5. The optical clear adhesive composition of claim 1 , wherein the at least two different hydroxyacrylates comprise hydroxypropyl methacrylate and hydroxyethyl methacrylate.

6. The optical clear adhesive composition of claim 1 , wherein the at least two different hydroxyacrylates account for 4.2 wt % to 25 wt % in the optical clear adhesive composition.

7. The optical clear adhesive composition of claim 1 , wherein the acrylate monomers comprise 3-phenoxybenzyl acrylate, tricyclo[5.2.1.02,6]decan-8-ol methacrylate, hydroxypropyl methacrylate, hydroxyethyl methacrylate, and lauryl acrylate.

8. The optical clear adhesive composition of claim 7 , wherein the 3-phenoxybenzyl acrylate accounts for 5 wt % to 40 wt % in the optical clear adhesive composition, the tricyclo[5.2.1.02,6]decan-8-ol methacrylate accounts for 10 wt % to 40 wt % in the optical clear adhesive composition, the hydroxypropyl methacrylate accounts for 4 wt % to 15 wt % in the optical clear adhesive composition, the hydroxyethyl methacrylate accounts for 0.2 wt % to 10 wt % in the optical clear adhesive composition, and the lauryl acrylate accounts for 0 wt % to 15 wt % in the optical clear adhesive composition.

9. The optical clear adhesive composition of claim 1 , wherein the photoinitiator is a phosphine oxide photoinitiator.

10. The optical clear adhesive composition of claim 9 , wherein the phosphine oxide photoinitiator comprises diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide.

11. The optical clear adhesive composition of claim 1 , further comprising an antioxidant, a crosslinking agent, and a leveling agent.

12. The optical clear adhesive composition of claim 11 , wherein the antioxidant comprises 2,6-di-tert-butyl-4-methylphenol, the crosslinking agent comprises 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone, and the leveling agent comprises modified polysiloxane.

13. The optical clear adhesive composition of claim 12 , wherein the 2,6-di-tert-butyl-4-methylphenol accounts for 0.1 wt % to 5 wt % in the optical clear adhesive composition, the 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone accounts for 0.1 wt % to in the optical clear adhesive composition, and the modified polysiloxane accounts for 0.1 wt % to 5 wt % in the optical clear adhesive composition.

14. An optical clear adhesive layer prepared by curing and crosslinking the optical clear adhesive composition of claim 1 with an ultraviolet light irradiation.

15. The optical clear adhesive layer of claim 14 , wherein a ratio of an adhesion strength to an elastic modulus of the optical clear adhesive layer at a temperature of 80° C. to 90° C. is greater than 1.

16. The optical clear adhesive layer of claim 14 , wherein a tensile strength of the optical clear adhesive layer is between 3.7 N/mm 2 to 3.8 N/mm 2 .

17. The optical clear adhesive layer of claim 14 , wherein an optical phase difference of the optical clear adhesive layer is zero.

18. The optical clear adhesive layer of claim 14 , wherein a haze of the optical clear adhesive layer is between 0.01% to 0.03%.

19. A method of forming optical clear adhesive layer, comprising:

irradiating the optical clear adhesive composition of claim 1 with an ultraviolet light to cure and crosslink the optical clear adhesive composition.

20. The method of claim 19 , wherein an intensity of the ultraviolet light is between 40 mW/cm 2 to 200 mW/cm 2 .

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (53)