Optical laminate

Patent metadata

Field	Value
Publication number	US-11709294-B2
Application number	US-202017101967-A
Country	US
Kind code	B2
Filing date	Nov 23, 2020
Priority date	Jan 14, 2019
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

The present disclosure provides an optical laminate which exhibits improved adhesive strength and scratch resistance together with excellent hardness and fingerprint resistance properties, by further including a fingerprint-resistant layer including an organosilane having excellent adhesion strength with the hard coating layer and an anti-fouling function on the hard coating layer including the transparent support substrate layer and the hard coating layer.

First claim

The invention claimed is:

1. An optical laminate comprising:
a support substrate layer having a thickness of 30 to 100 μm;
a hard coating layer disposed on both surfaces of the support substrate layer and having a thickness of 60 to 100 μm; and
a fingerprint-resistant layer disposed on at least one surface of the hard coating layer and having a thickness of 10 nm to 5 μm,
wherein the fingerprint-resistant layer includes a cured product of a composition comprising a binder resin and an organic silane compound and wherein the organic silane compound has at least one organic functional group selected from the group consisting of an epoxy group, a (meth)acryloxy group, a mercapto group and an amino group, and
wherein the hard coating layer includes an epoxy polysiloxane of Chemical Formula 1,
(R 1 SiO 3/2 ) a (R 2 SiO 3/2 ) b (OR) c   [Chemical Formula 11]

in the Chemical Formula 1,
R 1 is a glycidyl group represented by Chemical Formula 2; or glycidoxypropyl group,

in the Chemical Formula 2,
Ra is selected from the group consisting of a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynylene group having 2 to 20 carbon atoms, —Rb— CH═CH— COO-Rc-; -Rd-OCO—CH═CH—Re—, —RfORg-, —RhCOORi-, and -RjOCORk-,
Rb to Rk are each independently a single bond, or a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms,
R 2 is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted arylalkyl group having 7 to 20 carbon atoms, a substituted or unsubstituted alkylaryl group having 7 to 20 carbon atoms, an epoxy group or a hydrogen atom,
R is a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and
a, b, and c are each
0<a<1, 0≤b<1 and 0<c<1.

2. The optical laminate of claim 1 , wherein the organic silane compound is contained in an amount of 0.1 to 5.0% by weight based on the total weight of the composition.

3. The optical laminate of claim 1 , wherein the binder resin is at least one selected from the group consisting of a perfluoro polyether compound and a fluoro modified silicone compound.

4. The optical laminate of claim 1 , wherein in the Chemical Formula 1, a, b and c satisfy 0.7≤a/(a+b)≤1, 0≤b<0.5 and 0<c<0.5.

5. The optical laminate of claim 1 , wherein in the Chemical Formula 2, Ra is a methylene group.

6. The optical laminate of claim 1 , wherein in the Chemical Formula 1, the R 2 is substituted with one or more substituents selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 12 carbon atoms, an amino group, an acryl group, a methacryl group, a halogen group, a mercapto group, an ether group, an ester group, an acetyl group, a formyl group, a carboxyl group, a nitro group, a sulfonyl group, an urethane group, an epoxy group, an oxetane group and a phenyl group.

7. The optical laminate of claim 1 , wherein the hard coating layer further includes an elastomeric polymer.

8. The optical laminate of claim 7 , wherein the elastomeric polymer includes at least one selected from the group consisting of alkanediol having 1 to 20 carbon atoms, polyolefin polyol, polyester polyol, polycaprolactone polyol, polyether polyol and polycarbonate polyol.

9. The optical laminate of claim 1 , wherein the hard coating layer further comprises a reactive monomer including at least one functional group capable of crosslinking with the epoxy polysiloxane of the Chemical Formula 1.

10. The optical laminate of claim 9 , wherein the reactive monomer includes any one selected from the group consisting of bisphenol A diglycidyl ether, 4-vinylcyclohexene dioxide, cyclohexene vinyl monooxide, (3,4-epoxycyclohexyl)methyl 3,4-epoxycyclohexylcarboxylate, 3,4-epoxycyclohexylmethyl methacrylate, 3,4-epoxycyclohexanecarboxylate, 2-(3,4-epoxycyclohexyl)-1,3-dioxolane, bis(3,4-epoxycyclohexylmethyl)adipate, p-butyl phenol glycidyl ether, butyl glycidyl ether, cresyl glycidyl ether, allyl glycidyl ether, phenyl glycidyl ether, diglycidyl ether, butanediol diglycidyl ether, limonene dioxide, vinylcyclohexene dioxide, diethylene glycol diglycidyl ether, 3-methyloxetane, 2-methyloxetane, 3-oxetanol, 2-methyleneoxetane, 3-methyl-3-hydroxymethyloxetane, 3-ethyl-3-hydroxymethyloxetane, 3,3-oxetanedimethane thiol, 2-ethylhexyl oxetane, 4-(3-methyloxetane-3-yl)benzonitrile, N-(2,2-dimethylpropyl)-3-methyl-3-oxetanemethanamine, N-(1,2-dimethylbutyl)-3-methyl-3-oxetanemethanamine, xylylene bisoxetane, 3-ethyl-3[{(3-ethyloxetane-3-yl)methoxy}methyl]oxetane, (3-ethyloxetane-3-yl)methyl (meth)acrylate, and 4-[(3-ethyloxetane-3-yl)methoxy]butan-1-ol, or a mixture of two or more thereof.

11. The optical laminate of claim 1 , wherein the support substrate layer includes a plastic resin and wherein the plastic resin includes one or more resins selected from the group consisting of polyester-based resin, cellulose-based resin, polycarbonate-based resin, acrylic-based resin, styrene-based resin, polyolefin-based resin, polyimide-based resin, polyether sulfone-based resin and sulfone-based resin.

12. A polarizing plate comprising the optical laminate of claim 1 .

13. A display device comprising the optical laminate of claim 1 .

14. A cover window of a display device comprising the optical laminate of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Kim Ha Neul
• Lee Eun Seon
• Baek Seungil
• Kim Se Jeong
• Kim Woo Han
• Choi Yeongkyu

Classifications

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D5/002

  Priming paints (C09D5/08 takes precedence) · CPC title

• C09D127/18

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C09D133/062

  Copolymers with monomers not covered by C09D133/06 · CPC title