申请人:Ciba-Geigy Corporation
公开号:US04161603A1
公开(公告)日:1979-07-17
Dicarboxylic acids or dicarboxylic acid esters, containing a N,N-heterocyclic radical, of the formula ##STR1## in which the two R.sub.1 independently of one another each denote hydrogen, an alkyl with 1 to 4 C atoms or a phenyl, the two R.sub.2 independently of one another each denote hydrogen or an alkyl with 1 to 10 C atoms, the two n represent identical or different numbers from 2 to 12 and X denotes a divalent monocyclic N,N-heterocyclic radical of benzimidazolone, parabanic acid, 2,2-dimethylimidazolidine-4,5-dione, 6-ethyluracil or barbituric acid are prepared by reacting 1 mol of the corresponding N,N-heterocyclic compounds with 2 mols of a compound of the formula ##STR2## wherein Y.sub.1 denotes a chlorine or bromine atom. The dicarboxylic acid compounds have a high stability to heat and therefore are very suited for the manufacture of polycondensates by the melt condensation process.
含有N,N-杂环基团的二羧酸或二羧酸酯,其化学式为##STR1##其中两个R.sub.1分别表示氢、1至4个碳原子的烷基或苯基,两个R.sub.2分别表示氢或1至10个碳原子的烷基,两个n表示2至12之间相同或不同的数字,X表示苯并咪唑酮、对苯二羧酸、2,2-二甲基咪唑烷-4,5-二酮、6-乙基尿嘧啶或巴比妥酸的二价单环N,N-杂环基团,通过将相应的N,N-杂环化合物的1摩尔与化学式##STR2##中Y.sub.1表示氯或溴原子的化合物的2摩尔反应制备而成。这些二羧酸化合物对热稳定性较高,非常适合通过熔融缩聚法制造聚酯。