申请人:Bayer Aktiengesellschaft
公开号:US04923641A1
公开(公告)日:1990-05-08
Highly concentrated stable solutions of color-forming agents of the general formula ##STR1## wherein x denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino and R denotes alkyl, alkenyl or aralkyl, further isocyclic or heterocyclic rings can be fused onto the rings A, B, C and D and the cyclic and acyclic radicals and the rings A, B, C and D can carry further non-ionic substituents which are customary in dyestuff chemistry, or mixtures thereof, in water-insoluble organic solvents from the group comprising optionally chlorinated hydrocarbons, vegetable oils and phthalic acid esters are used for the preparation of pressure-sensitive recording materials.
通式为##STR1##的色形成剂高浓度稳定溶液,其中x表示羟基,烷氧基,烯基氧基,芳烷氧基,环烷氧基,芳基氧基,酰氧基,烷基氨基,二烷基氨基,酰基氨基,芳基烷基氨基或芳基氨基,R表示烷基,烯基或芳基烷基,环内或杂环可以融合到环A、B、C和D上,环和非环基团以及环A、B、C和D可以携带进一步的非离子取代基,这些非离子取代基在染料化学中是常见的,或其混合物,在不溶于水的有机溶剂中制备压敏记录材料,所述有机溶剂来自可选氯化烃,植物油和邻苯二甲酸酯组成的群。