Title:
POLYESTER IMIDE RESIN BASED VARNISH FOR LOW-PERMITTIVITY COATING
Document Type and Number:
WIPO Patent Application WO/2012/026438
Kind Code:
A1
Abstract:
Provided are: a varnish capable of forming a low-permittivity insulating layer which comprises a polyester imide as the main component; and an insulated wire in which a low permittivity is attained using the varnish. The varnish comprises, as the main component, a polyester imide resin obtained by reacting a carboxylic component that consists of a carboxylic acid component containing a dicarboxylic acid, or an anhydride or alkyl ester thereof with an alcohol component and a diamine compound. In the polyester imide resin, the monomer composition is regulated so as to give a molar ratio (OH/COOH) of the hydroxyl of the alcohol component to the carboxyl of the carboxylic component of 1.9 or less, or the content of imido (which exhibits high polarizability) per unit polyester imide molecular chain is reduced by increasing the molecular weights of the starting monomers. It is preferable to use, as the starting monomers, a carboxylic acid component containing a dicarboxylic acid having a molecular weight of 167 or more and/or a diamine compound having a molecular weight of 250 or more.
Inventors:
SAITO Hideaki (Ltd. 1-3 Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
齋藤 秀明 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
FURUYA Yudai (Ltd. 1-3 Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
古屋 雄大 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
齋藤 秀明 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
FURUYA Yudai (Ltd. 1-3 Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
古屋 雄大 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
Application Number:
JP2011/068902
Publication Date:
March 01, 2012
Filing Date:
August 23, 2011
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD. (5-33 Kitahama 4-chome, Chuo-ku Osaka-sh, Osaka 41, 〒5410041, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
SUMITOMO ELECTRIC WINTEC, INC. (1074, Eda Shigaraki-cho, Koka-sh, Shiga 11, 〒5291811, JP)
住友電工ウインテック株式会社 (〒11 滋賀県甲賀市信楽町江田１０７４番地 Shiga, 〒5291811, JP)
SAITO Hideaki (Ltd. 1-3 Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
齋藤 秀明 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
SUMITOMO ELECTRIC WINTEC, INC. (1074, Eda Shigaraki-cho, Koka-sh, Shiga 11, 〒5291811, JP)
住友電工ウインテック株式会社 (〒11 滋賀県甲賀市信楽町江田１０７４番地 Shiga, 〒5291811, JP)
SAITO Hideaki (Ltd. 1-3 Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
齋藤 秀明 (〒24 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 Osaka, 〒5540024, JP)
International Classes:
H01B3/30; C08G18/34; C08G73/16; C08L61/06; C08L79/08; C09D5/25; C09D179/08; H01B7/02
Attorney, Agent or Firm:
KAMITANI Eriko (9-4 Higashitenma 2-chome, Kita-ku Osaka-sh, Osaka 44, 〒5300044, JP)
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