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    • 9. 发明授权
    • Binders for cathodic electrocoating
    • 阴极电泳用粘合剂
    • US4713406A
    • 1987-12-15
    • US934623
    • 1986-11-25
    • Eberhard SchuppRolf OsterlohWerner LochKlaas Ahlers
    • Eberhard SchuppRolf OsterlohWerner LochKlaas Ahlers
    • C08G59/50C08G59/58C09D5/44C09D163/00C08L63/02
    • C09D5/4438C08G59/50C08G59/58
    • Binders for cathodic electrocoating which are based on polyadducts/polycondensates which carry basic nitrogen groups and are rendered water-dilutable by protonation with an acid, and one or more crosslinking agents for these polyadducts/polycondensates, their use and electrocoating baths prepared from them.These binders essentially consist of a mixture of(A) from 50 to 90% by weight of a polyadduct/polycondensate which carries basic nitrogen groups and is obtainable by reacting(a) an essentially epoxide-free adduct of a secondary amine and polyepoxide compound with(b) a condensate of a diamine/polyepoxide adduct which is prepared in the presence of excess diamine and separated off from excess diamine after complete conversion of the epoxide groups, with one or more mono- and/or dicarboxylic acids of not less than 6 carbon atoms.(B) from 10 to 50% by weight of a crosslinking agent which does not react with component (A) at room temperature but reacts with the latter at elevated temperatures with crosslinking.These binders are particularly useful for the cathodic electrocoating of electrically conductive substrates.
    • 用于阴极电泳的粘合剂,其基于承载碱性氮基并通过用酸质子化而被水稀释的聚加合物/缩聚物,以及一种或多种用于这些聚加合物/缩聚物的交联剂,它们的用途和由它们制备的电泳浴。 这些粘合剂基本上由(A)50-90%重量的承载碱性氮基团的聚加合物/缩聚物组成,可通过使(a)仲胺和聚环氧化物化合物的基本上不含环氧化物的加合物与 (b)二胺/聚环氧化物加合物的缩合物,其在过量二胺存在下制备并在完全转化环氧基之后与过量二胺分离,与一种或多种不少于6个的单 - 和/或二羧酸 碳原子。 (B)10至50重量%的交联剂,其在室温下不与组分(A)反应,但在高温下与交联反应。 这些粘结剂特别适用于导电基材的阴极电涂层。