Transparent conductive sheet

• US 6,136,444 A
• Filed: 02/01/1996
• Issued: 10/24/2000
• Est. Priority Date: 02/02/1995
• Status: Expired due to Fees

• Current Assignee: Teijin Limited
• Original Assignee: Teijin Limited
• Inventors: Kon, Tatsuichiro, Igarashi, Satoshi, Fujishima, Hiroyuki, Tamura, Yuji, Yahata, Kazuo
• Primary Examiner(s): Thibodeau, Paul
• Assistant Examiner(s): TARAZANO, DONALD LAWRENCE
• Application Number:
  US08/595,581
• Time in Patent Office: 1,727 Days
• Field of Search: 428/447, 428/412, 428/413, 428/416, 428/414, 428/450, 428/451, 428/500, 428/1, 428/429, 428/703, 428/423.1, 428/448, 428/522, 349/122
• US Class Current: 428/423.1
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: C08J 2439/06 Homopolymers or copolymers of N-vinyl-pyrrolidones
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: C09K 2323/05 Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: H05B 33/28 of translucent electrodes
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

A transparent conductive sheet comprises a silicon oxide gas barrier layer, an organosilicon compound-containing solvent-resistant layer and a transparent conductive layer laminated in that order on one side of a transparent plastic substrate, or a polyvinyl alcohol-based resin gas barrier layer and a solvent-resistant layer laminated in that order, over an anchor coat layer.

Claims

1. A transparent conductive sheet comprising:

i) a plastic substrate having a first and second side,

ii) a gas barrier layer of a metal oxide layer on or above said plastic substrate on said first side thereof

iii) an organosilicon-containing layer on and adhered to said gas barrier layer, said organosilicon-containing layer being a cured layer of a resin composition comprising;

a) a radiation curable resin, and

b) a hydrolysate of at least one alkoxysilane represented by formula (1) or formula (2), or a mixture thereof;

space="preserve" listing-type="equation">R.sup.1 --Si(OR.sup.2).sub.3. (

     1)

space="preserve" listing-type="equation">Si(OR.sup.2).sub.4 (

     2)

wherein R¹ is a methyl group, an ethyl group or an organic group containing at least one group selected from the group consisting of a vinyl group, an acryloyl group, a methacryloyl group, and wherein R² is a methyl group or an ethyl group, and

iv) a transparent electrically conductive layer as an outermost layer on either said first side or said second side of said plastic substrate.

2. The transparent conductive sheet according to claim 1, wherein said organosilicon-containing layer has a thickness sufficient to allow said organosilicon containing layer to serve as a solvent-resistant layer.

3. The transparent conductive sheet according to claim 1 further comprising a solvent-resistant layer on or above an outer side of said organosilicon-containing layer wherein said organosilicon-containing layer serves as an intervening layer that promotes adhesion of said gas barrier layer with a solvent resistant layer.

4. The transparent conductive sheet according to claim 1, wherein said resin composition comprises said radiation curable resin and said hydrolysate in a solid weight ratio of 20:

1 to 1;

3.

5. The transparent conductive sheet according to claim 1, wherein said alkoxysilane is selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane, γ

-acryloxypropyltrimethoxysilane, γ

-methacryloxypropyltrimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, γ

-aminopropyltriethoxysilane and γ

-glycidoxypropyltrimethoxysilane.

6. The transparent conductive sheet according to claim 5, wherein said alkoxysilane is selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane, and γ

-acryloxypropyltrimethoxysilane.

7. The transparent conductive sheet according to claim 2, wherein said radiation curable resin comprises a polyfunctional acrylate.

8. The transparent conductive sheet according to claim 6, wherein said acrylate is represented by formula (8):

##STR18## wherein X is a divalent group represented by;

##STR19## wherein R is a hydrogen atom, a halogen atom, a methyl group, or an ethyl group; and

n is a number in a range of 0.5 to 2 as an average.

9. The transparent conductive sheet according to claim 7, wherein the radiation curable resin contains at least 50% of an aliphatic polyfunctional acrylic resin with at least two acryl groups per molecule, based on the total weight of the resin.

10. The transparent conductive sheet according to claim 1, further comprising a gas barrier layer of a polyvinylalcohol resin layer, wherein said metal oxide layer and polyvinylalcohol resin layer are present on the same side of said plastic substrate, and wherein said polyvinylalcohol resin layer is present on an outer side of said metal oxide layer.

11. The transparent conductive sheet according to claim 1, further comprising a gas barrier layer of a polyvinylalcohol resin layer, wherein said metal oxide layer and said polyvinylalcohol resin layer are present on opposite sides of said plastic substrate.

12. The transparent conductive sheet according to claim 1, wherein said organosilicon-containing layer is a cured layer of resin composition comprising:

(a) a radiation curable resin, comprising a polyfunctional acrylate represented by formula (8);

##STR20## wherein X is a divalent group represented by;

##STR21## wherein R is a hydrogen atom, a halogen atom, a methyl group, or an ethyl group; and

n is a number in a range of 0.5 to 2 as an average, and

(b) a hydrolysate of a least one alkoxysilane represented by formula (1) or formula (2), or a mixture thereof;

space="preserve" listing-type="equation">R.sup.1 -Si(OR.sup.2).sub.3 (

     1)

space="preserve" listing-type="equation">Si(OR.sup.2).sub.4 (

     2)

wherein R¹ is a methyl group;

or an organic group containing a vinyl group, an acryloyl group, a methacryloyl group, an amino group or epoxy group, and

wherein R² is methyl group or an ethyl group.

13. The transparent conductive sheet according to claim 1, wherein the radiation curable resin contains an acryloyl or methacryloyl group.

17. The transparent conductive sheet according to claim 4, wherein said first anchor layer comprising a cured phenoxy resin is obtained by curing a thermal cross-linking resin consisting of a mixture of:

(a) at least one phenoxy resin comprising repeating units represented by formula (5);

##STR22## wherein R⁹, R¹⁰, R¹¹, R¹², R¹³, and R¹⁴, are each independently a hydrogen atom, or an alkyl group having from 1-3 carbon atoms,

wherein R¹⁵ is an alkylene group having from 2-5 carbon atoms,

wherein X is an ether group or an ester group,

wherein m is 0 or an integer of from 1 to 3, and

(b) a polyfunctional isocyanate compound containing at least 2 isocyanate groups.

18. The transparent conductive sheet according to claim 17, wherein said thermal cross-linking resin has a ratio, by number, of isocyanate groups in said polyfunctional isocyanate compound to hydroxy groups in said phenoxy resin, NCO/OH, in a range of 0.2 to 3.

19. The transparent conductive sheet according to claim 17, wherein in formula (5), R⁹ and R¹⁰ are each a methyl group;

R¹¹, R¹², R¹³ and R¹⁴, are each a hydrogen atom; and

R¹⁵ is pentylene group.

20. The transparent conductive sheet according to claim 17, wherein said polyfunctional isocyanate compound is selected from the group consisting of 2,6-tolylene diisocyanate, 2,4-tolylene isocyanate, tolylene diisocyanate-trimethylolpropane adduct and hexamethylene diisocyanate.

14. A transparent conductive sheet comprising

a plastic substrate having a first and second side,

a first gas barrier layer of a polyvinylalcohol resin layer on or above said plastic substrate on said first side thereof and

a second gas barrier layer of a metal oxide layer which is present on said first or said second side of said plastic substrate,

a solvent-resistant layer on and contiguous to said first gas barrier layer or said solvent-resistant layer having a second anchor layer interposed between said first gas barrier and said solvent-resistant layer, and

a transparent electrically conductive layer as an outermost layer on either said first side or said second side of said plastic substrate,

wherein a first anchor layer of a cured phenoxy resin is present between said polyvinylalcohol resin layer and said plastic substrate, said cured phenoxy resin layer being contiguous to said polyvinylalcohol resin layer.

15. The transparent conductive sheet according to claim 14,

wherein said first and second gas barrier layers are present on the same side of said plastic substrate, and wherein said first gas barrier layer is on an outer side of said second gas barrier layer.

16. The transparent conductive sheet according to claim 14,

wherein said first and second gas barrier layers are present on opposite sides of said plastic substrate.