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    • 26. 发明公开
    • BINDER RESIN FOR COATING PASTE
    • BINDEMITTELFÜRBESCHICHTUNGSPASTE
    • EP1637546A1
    • 2006-03-22
    • EP04746596.8
    • 2004-06-28
    • SEKISUI CHEMICAL CO., LTD.
    • ICHITANI, Motokuni, c/o Sekisui Chemical Co. Ltd.II, Daizo, c/o Sekisui Chemical Co. Ltd.OCHITANI, Yukio, c/o Sekisui Chemical Co. Ltd.TAKAHASHI, Hideyuki, c/o Sekisui Chemical Co. Ltd.SAKASHITA, Katsuaki, c/o Sekisui Chemical Co. Ltd.
    • C08F8/48C09D129/14
    • C03C8/16C03C3/072C08F8/48C08J5/18C09D129/14C08F8/28C08F16/06
    • It is the object or the present invention to provide a binder resin for coating paste, comprising a polyvinyl acetal type resin, having an excellent dispersibility of inorganic powder such as conductive powder, ceramic powder and glass powder and being capable of exerting an extremely excellent coating property, particularly a printing property, when dispersing the inorganic powder to form paste, conductive paste, ceramic paste and glass paste.
      The present invention is a binder resin for coating paste for forming a film or a film pattern comprising inorganic powder by coating, which comprises a modified polyvinyl acetal resin comprising structural units represented by the following general formulas (1), (2), (3) and (4):





      in the formulas, R 1 represents a straight chain or branched alkyl group having 1 to 20 carbon atoms, and R 2 represents hydrogen, a straight chain, branched or cyclic alkyl group having 1 to 20 carbon atoms, or an aryl group; and n represents an integer of 1 to 8; and further in the modified polyvinyl acetal resin, a content of the structural unit represented by the general formula (3) is 1 to 20 mol% and a content of the structural unit represented by the general formula (4) is 30 to 78 mol%.
    • 本发明的目的是提供一种用于涂料的粘合剂树脂,其包含聚乙烯醇缩醛型树脂,其具有优异的无机粉末如导电粉末,陶瓷粉末和玻璃粉末的分散性,并且能够施加极好的涂层 特性,特别是印刷性,当分散无机粉末形成糊状物,导电膏,陶瓷膏和玻璃糊时。 本发明是一种用于涂膜形成用粘合剂树脂或包含无机粉末的膜图案,其包含通过下述通式(1),(2),(3)表示的结构单元的改性聚乙烯醇缩醛树脂 )和(4):式中,R 1表示碳原子数1〜20的直链或支链烷基,R 2表示氢,碳原子数1〜20的直链,支链或环状烷基,或 芳基; n表示1〜8的整数, 进一步在改性聚乙烯醇缩醛树脂中,由通式(3)表示的结构单元的含量为1〜20摩尔%,通式(4)表示的结构单元的含量为30〜78摩尔% 。