申请人:Etat Francais represente par le Delegue General pour l'Armement
公开号:US04287337A1
公开(公告)日:1981-09-01
The invention relates to spiropyran compounds. They have the general formula (I): ##STR1## in which: X represents the CH.sub.2 group or a sulfur atom; R.sub.1 and R.sub.2 represent electron donor and/or acceptor groups selected for instance from the group NO.sub.2, COC.sub.6 H.sub.5, CN, the halogens, the acyl substituents, alkoxy substituents, the hydrogen atom, the alkyl and mercaptoalkyl groups, the ethers of the formula CH.sub.2 OR, thioethers of the formula CH.sub.2 SR and amines of the formula CH.sub.2 NR.sub.2 in which R represents an alkyl group; R.sub.3 is a linear or branched alkyl group, having 1 to 18 carbon atoms, or an arylalkyl or alkenyl group. --R.sub.4,R.sub.5,R.sub.6,R.sub.7,R.sub.8 and R.sub.9 have one of the meanings indicated for R.sub.3 or represent, two by two, with the group in ortho position, a --(CH.sub.2).sub.n -- group in which n is a number between 5 and 10. R.sub.10 represents a hydrogen atom if X=S and if X=CH.sub.2 a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an arylalkyl group in which the alkyl group has 1 to 5 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms. The compounds in accordance with the invention have photochromic properties and are suitable for the recording of information on transparent or opaque supports.
该发明涉及螺环吡喃化合物。它们具有一般式(I):##STR1##其中:X代表CH.sub.2基团或硫原子;R.sub.1和R.sub.2代表电子给体和/或受体基团,例如从NO.sub.2、COC.sub.6 H.sub.5、CN、卤素、酰基取代基、烷氧基取代基、氢原子、烷基和巯基烷基基团、CH.sub.2 OR式醚、CH.sub.2 SR式硫醚和CH.sub.2 NR.sub.2式胺中选择,其中R代表烷基;R.sub.3是线性或支链烷基基团,具有1至18个碳原子,或芳基烷基或烯基基团。--R.sub.4、R.sub.5、R.sub.6、R.sub.7、R.sub.8和R.sub.9具有R.sub.3所示的含义之一,或者两两表示,与邻位的基团一起,一个--(CH.sub.2).sub.n--基团,其中n是5到10之间的数字。R.sub.10代表氢原子,如果X=S,如果X=CH.sub.2,则代表氢原子、具有1至18个碳原子的烷基基团、芳基烷基基团,其中烷基基团具有1至5个碳原子,或具有2至10个碳原子的烯基基团。根据该发明的化合物具有光致变色性能,并适用于在透明或不透明支撑物上记录信息。