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Electrically conductive paste and metal thin film

A technology of conductivity and metal particles, applied in conductive coatings, metal pattern materials, conductive layers on insulating carriers, etc., can solve problems such as insufficient performance and achieve excellent dispersion stability

Inactive Publication Date: 2012-09-26
TOYO TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Document 5 discloses the use of a polyester resin having a branch unit and a hydroxyl group in the molecule, but sufficient performance has not yet been achieved in terms of adhesion to substrates and volume resistivity

Method used

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  • Electrically conductive paste and metal thin film
  • Electrically conductive paste and metal thin film
  • Electrically conductive paste and metal thin film

Examples

Experimental program
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Effect test

Embodiment

[0049] Hereinafter, examples are given to further describe the present invention in detail, but the present invention is not limited to the examples at all. In addition, the measured value described in an Example is the value measured by the following method. In addition, unless otherwise stated, a part means a weight part.

[0050] Hereinafter, the abbreviations of the compounds shown in this paper and the tables in the examples represent the following compounds respectively:

[0051] T: Terephthalic acid

[0052] I: Isophthalic acid

[0053] O: phthalic acid

[0054] SIPA: Sodium isophthalic acid-5-sulfonate

[0055] HOPA: Hydrogenated phthalic acid

[0056] AA: adipic acid

[0057] SA: Sebacic acid

[0058] TMA: trimellitic anhydride

[0059] NPG: Neopentyl glycol

[0060] EG: ethylene glycol

[0061] PD: 1,5-pentanediol

[0062] HD: 1,6-Hexanediol

[0063] 2MD: 2-methyl-1,3-propanediol

[0064] BEPD: 2-Butyl-2-ethyl-1,3-propanediol

[0065] DEG: diethylene gl...

Synthetic example 1

[0087] Synthesis example 1 Synthesis of carboxyl-containing branched polyester (b1)

[0088] 131.9 parts of dimethyl isophthalate, 48.0 parts of neopentyl glycol, 122.0 parts of 1,6-hexanediol and tetrabutyl titanate were placed in a reaction vessel equipped with a thermometer, a stirrer, and a Liebig cooling tube. 0.1 part of oxyester, heated at 150~230°C for 180 minutes, after transesterification, 43.7 parts of phthalic anhydride and 3.8 parts of trimellitic anhydride were added, and the esterification reaction was carried out at 200~250°C for 60 minutes. Then, while raising the temperature to 260° C., the system was gradually decompressed, and it became 0.3 mmHg or less after 10 minutes. After reacting under these conditions for 60 minutes, the reaction system was returned to normal pressure in a nitrogen atmosphere, and the temperature of the system was set to 220°C. 1.9 parts of trimellitic anhydride was added and stirred at 220° C. for 45 minutes in a nitrogen atmospher...

Synthetic example 2

[0089] Synthesis example 2 Synthesis of carboxyl-containing branched polyester (b2)

[0090] In a reaction vessel equipped with a thermometer, a stirrer, and a Liebig cooling tube, 131.9 parts of dimethyl isophthalate, 48.0 parts of neopentyl glycol, 122.0 parts of 1,6-hexanediol and 0.1 parts of tetrabutoxy titanate were charged Parts, heated at 150~230°C for 180 minutes, after transesterification, 42.9 parts of phthalic anhydride and 3.8 parts of trimellitic anhydride were added, and esterification reaction was carried out at 200~250°C for 60 minutes. Then, while raising the temperature to 260° C., the pressure in the system was gradually reduced to 0.3 mmHg or less after 10 minutes. After reacting under these conditions for 60 minutes, the reaction system was returned to normal pressure in a nitrogen atmosphere, and the temperature of the system was set to 220°C. 3.8 parts of trimellitic anhydride were added, and it stirred at 220 degreeC for 45 minutes in the nitrogen atm...

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Abstract

An electrically conductive paste comprising metal microparticles, a branched polyester and an organic solvent, wherein the metal microparticles have an average particle diameter of 1*10-3 to 5*10-1 [mu]m inclusive, the branched polyester has a branching point derived from a polycarboxylic acid compound having a functionality of three or more and / or a polyol compound having three or more functionalities, the branched polyester has an acid value of 30 to 200 equivalents / 106 g inclusive, the branched polyester contains, as copolymerization components, at least one residue selected from an isophthalic acid residue, an ortho-phthalic acid residue and a cyclohexanedicarboxylic acid residue and a compound produced by substituting at least one hydrogen atom that is bound to a carbon atom contained in a linear alkyl diol having 3 to 5 carbon atoms by a linear alkyl group having 1 to 4 carbon atoms, the branched polyester has a glass transition temperature of lower than 40 DEG C, and the metal microparticles are contained in an amount of 600 to 1500 parts by weight relative to 100 parts by weight of the branched polyester.

Description

technical field [0001] The present invention relates to a conductive paste using a specific polyester resin as a resin binder, a method for producing a metal thin film laminate using the same, a metal thin film, and applications thereof. Background technique [0002] A technique for forming a conductive circuit by drawing a circuit by using a conductive paste in which conductive fine particles such as metal fine particles are dispersed in a medium, using screen printing or a dispenser, is widely used. The conductive fine particles used here are generally flakes with a particle diameter of several μm or more, and the thickness of the circuit is made to be 10 μm or more to ensure conductivity. In recent years, conductive circuits have rapidly progressed toward high density. In order to be able to form a denser circuit, the development of finer metal particles is being carried out. [0003] The production method of fine particles is classified into solid phase method, gas pha...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B5/14H01B13/00H05K1/09
CPCH05K2201/0145H05K1/095H01B1/22C08G18/0823C08G18/4213C08G18/7671C09D5/24G06F3/041H01B5/14H01B13/00H01B13/0026H01B13/0033H05K1/09
Inventor 小木浩二鲇泽佳孝近藤孝司木津本博俊八塚刚志
Owner TOYO TOYOBO CO LTD
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