Conductive coating material having good adhesiveness to...

C - Chemistry – Metallurgy – 09 – D

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C09D 5/24 (2006.01) C09D 161/06 (2006.01) H01B 1/22 (2006.01) H05K 1/09 (2006.01)

Patent

CA 2146016

A conductive coating material having good solderability and adhesiveness without the necessity for accurately controlling the hardening condition. It is prepared by kneading a mixture of 100 parts by weight of a silver-plated copper powder (with a silver content of 30 wt.% or less) with 13.6-6.0 parts by weight (in terms of solid content) of a phenolic resin satisfying the requirement (1) which will be described hereinafter, 0.2-0.7 part by weight of a coupling agent containing a saturated fatty acid, 1.0-4.0 parts by weight of triethanolamine, 0.1-1.0 part by weight of dihydroxybenzene, a suitable amount of a defoamer, and a suitable amount of a solvent mixture consisting of 9.5-8.0 parts by weight by butyl carbitol and 0.5-2.0 parts by weight of acetylacetone requirement (1): (i) l/n = 0.8-1.2, (11) m/n = 0.8-1.2, (iii) b/a = 0.8-1.2, and (iv) c/a = 1.2-1.5, wherein 1, m, n, a, b, and c represent the infrared transmittances of, respectively, a 2-monosubstituted derivative, 2,4-disubstituted derivative, 2,4,6-trisubstituted derivative, methylol group, dimethylene ether group, and phenyl group.

Voici la description d'un matériau de revêtement conducteur possédant une bonne aptitude au brasage et une bonne capacité d'adhérence sans le besoin de contrôler avec précision l'état de durcissement. On le prépare en malaxant un mélange dont la proportion en poids de poudre de cuivre argentée est de 100 parties (le contenu d'argent est de 30 %, ou moins, du poids total), la proportion en poids (exprimé en fonction de contenu solide) de résine phénolique est de 13,6-6,0 parties répondant à l'exigence (1) (décrite ci-après), la proportion en poids d'un agent de pontage contenant un acide gras saturé est de 0,2-0,7 partie, les proportions en poids de triéthanolamine et de dihydroxybenzène sont de 1,0-4,0 parties et de 0,1-1,0 partie, respectivement, de quantités convenables d'un antimousse et d'un mélange de solvant composé d'éther monobutylique du diéthylèneglycol dont la proportion en poids est de 9,5-8,0 parties et d'acétylacétone de l'exigence (1) dont la proportion en poids est de 0,5-2,0 parties. Voici la description de l'exigence (1) : (i) l/n = 0,8-1,2, (11) m/n = 0,8-1,2, (iii) b/a = 0,8-1,2, et (iv) c/a = 1,2-1,5, où 1, m, n, a, b et c représentent les transmittances infrarouges de 2-dérivés monosubstitués, 2,4- dérivés disubstitués, 2,4,6-dérivés trisubstitués, les groupes de méthylol, de diméthylène-éther et de phényle, respectivement.

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