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    • 22. 发明授权
    • Polymeric materials suitable as dispersing resins
    • 适合作为分散树脂的聚合材料
    • US5756637A
    • 1998-05-26
    • US643587
    • 1996-05-06
    • Gregor BrodtJosef SchelbleAugust LehnerFranz WeingartAlbert KohlRia KressNorbert Schneider
    • Gregor BrodtJosef SchelbleAugust LehnerFranz WeingartAlbert KohlRia KressNorbert Schneider
    • C08L75/04C08G18/10C08G18/62C08G18/65C08G18/83C08L75/00C08L101/00C08L101/12C09D5/23G11B5/702G11B5/73
    • G11B5/7021C08G18/10C08G18/6245C08G18/831Y10S428/90
    • A polymeric material I is obtainable by reacting 1) a polymer II of a) from 80 to almost 100 mol % of a C.sub.1 -C.sub.25 -alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid, b) from 0 to 20 mol % of one or more further monomers and c) an initiator and/or regulator by means of which the majority of the polymer chains of the polymer II are terminated at one of their ends by a hydroxyl group, 2) with a polyfunctional nonaromatic isocyanate III to give a reaction product IV, the amount of isocyanate groups being from 1.2 to 3.9 mol per mole of the hydroxyl groups in II, 3) reacting IV with a) a compound V, containing groups reactive toward isocyanates, to give a reaction product VI, the amount of reactive groups being from 2 to 7 mol per mole of the free isocyanate groups still present in IV, and reacting VI with a compound VII to give the polymer I, which reacts with the reactive groups which are still free in VI and by means of which acidic groups are introduced into VI, or b) a compound VIII which contains groups reactive toward isocyanates and by means of which the acidic groups are introduced into IV, to give the polymer I. The polymeric materials can be used as dispersing resin for pigment-containing coatings, in particular for the production of magnetic recording materials.
    • 聚合物材料I可通过以下步骤获得:a)a)80至几乎100摩尔%的α,β-不饱和羧酸的C 1 -C 25烷基酯的聚合物II,b)0至20摩尔% 一个或多个另外的单体和c)引发剂和/或调节剂,聚合物II的大部分聚合物链通过羟基在其一端终止,2)与多官能非芳族异氰酸酯III一起给出 反应产物IV,II中每摩尔羟基的异氰酸酯基团的量为1.2至3.9摩尔,3)使IV与a)包含对异氰酸酯反应的基团的化合物V反应,得到反应产物VI, 反应基团的量相对于IV中仍然存在的每摩尔游离异氰酸酯基团为2至7摩尔,并且使VI与化合物VII反应,得到聚合物I,其与VI中仍具有自由基的反应性基团反应, 其中酸性基团被引入VI​​中,或b)化合物V III,其含有对异氰酸酯具有反应性的基团,并且通过其将酸性基团引入到IV中,得到聚合物I.聚合物材料可用作含颜料的涂料的分散树脂,特别是用于制备磁性记录材料 。