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Electrically conductive paste, electrically conductive film, touch panel, and process for production of electrically conductive thin film

A conductive paste, non-crystalline technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, conductive coatings, etc., can solve coating film leakage, uneven distribution of coating film, conductivity Or the impact of surface hardness and other issues, to achieve high reliability, improve adhesion, and good electrical conductivity

Active Publication Date: 2012-07-11
TOYO TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the silane coupling agent has a low molecular weight, it not only affects the conductivity and surface hardness due to the action of a plasticizer, but also is not ideal in terms of long-term reliability.
In addition, since the silane coupling agent is an additive used in a small amount, it is easy to distribute unevenly in the coating film, and it may bleed out during long-term storage of the coating film.

Method used

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  • Electrically conductive paste, electrically conductive film, touch panel, and process for production of electrically conductive thin film
  • Electrically conductive paste, electrically conductive film, touch panel, and process for production of electrically conductive thin film
  • Electrically conductive paste, electrically conductive film, touch panel, and process for production of electrically conductive thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0099] Examples and comparative examples are shown below to describe the present invention more specifically. In addition, this invention is not limited to the following embodiment. In addition, unless otherwise specified, "parts" in examples means "parts by mass", and the solid content concentration means the concentration of non-volatile matter after the solvent is completely volatilized.

[0100] Physical property evaluation (1. Number average molecular weight, 2. Glass transition temperature (Tg), 3. Acid value, and 4. Resin composition) of polyester resin (P) and polyurethane resin (U) produced in the production examples described later ) is measured as follows.

[0101] In addition, 10. storage stability of the conductive paste prepared using the polyester resin (P) and polyurethane resin (U) prepared in the production example, and the physical property evaluation of the test piece formed using the conductive paste (5. Adhesiveness, 6. Resistivity, 7. Pencil hardness, ...

manufacture example

[0128] Synthesis of Polyester Polyol (P)

[0129] Polyester polyol (P-1)

[0130] 700 parts of dimethyl terephthalate, 700 parts of dimethyl isophthalate, 671 parts of ethylene glycol, 526 parts of neopentyl glycol, tetratitanate 0.48 parts of butyl esters were transesterified at 180° C. for 3 hours. Next, the pressure was gradually reduced to below 1 mmHg, and polymerization was carried out at 240° C. for 1.5 hours. The composition of the obtained copolyester P-1 is terephthalic acid / isophthalic acid / / ethylene glycol / neopentyl glycol=50 / 50 / / 50 / 50 (molar ratio), number average molecular weight 2,000, acid Value 2eq / ton, Tg=58°C. The results are shown in Table 1.

[0131] Polyester polyol (P-2)~(P-5) and (P-7)

[0132] In the polyester polyol (P-1), the acid component and the diol component shown in Table 1 were used, and the monomers were replaced to the molar ratios in Table 1. In addition, by mixing with the polyester polyol (P- 1) Synthesis was carried out in the same...

Embodiment 1

[0165] 2,858 parts of polyurethane resin solution (U-1) with a solid content concentration of 35% by mass (1,000 parts in terms of solid content), 6,540 parts of flaky silver powder SF70A manufactured by Ferro Japan Co., Ltd., and carbon black manufactured by Lion Co., Ltd. 76 parts of ECP600JD, 76 parts of graphite BF manufactured by Chuetsu Graphite Industry Co., Ltd., 58 parts of MK Conk manufactured by Kyoeisha Chemical Co., Ltd. for the leveling agent, and 215516 parts of Disperbyk manufactured by Vitsuku Chemical Japan Co., Ltd. for the dispersant , The solvent is mixed with 640 parts of diethylene glycol ethyl ether acetate (ECA) and 210 parts of carbitol butyl ether acetate (BCA), and dispersed 3 times by chilled rolling three-roll mixer. Table 4 shows the amount of each component in all solutions. The obtained silver paste annealed PET film was used as a substrate, and after printing according to the method specified in 5. Adhesion test, it was dried at 120° C. for 30...

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Abstract

Disclosed is an electrically conductive paste which can be used for the formation of an electrically conductive thin film that has significantly improved adhesion to a substrate having a transparent electrically conductive layer or the like and can impart high reliability and high electrical conductivity to the substrate. The electrically conductive paste comprises: a component (A) which is a binder resin having an acid value of 50 to 500 eq / ton and a glass transition temperature of 60 to 150 DEG C and comprising a polyurethane resin; a component (B) which is a metal powder; and a component (C) which is an organic solvent.

Description

technical field [0001] The present invention relates to a conductive paste and its application. In more detail, it relates to a conductive paste containing a polyurethane resin as a binder resin, a conductive film made using the conductive paste, a manufacturing method thereof, and a laminate of the conductive film. A conductive laminate on a transparent conductive layer and a touch panel using the same. Background technique [0002] Transparent touch panels that can be operated by touching the screen with a finger or a dedicated pen are widely used in ATMs, car navigation systems, game machines, automatic ticket vending machines at stations, copiers, explanation terminals in museums, and portable information terminals. [0003] The transparent touch panel is composed of two transparent conductive films overlapping to form a switch. Generally, the transparent conductive film of this kind of transparent touch panel is deposited on substrates such as polyester film and glass ...

Claims

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Application Information

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IPC IPC(8): H01B1/22B32B9/00B32B27/40C09D5/24C09D7/12C09D175/04C09D175/06G06F3/041G06F3/045H01B5/14B32B27/18C09D11/02C09D11/033C09D11/52H01B13/00
CPCC08G18/755C08K3/04C08G18/6659C08G18/7671C08G18/4213C08G18/0823G06F3/041G06F2203/04103B32B7/12H01B1/22C09D5/24C08G18/3206C08K3/08
Inventor 浜崎亮
Owner TOYO TOYOBO CO LTD
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