UNSATURATED EOSINE DERIVATIVE AND A METHOD FOR ITS PREPARATION

摘要

The compound is applicable for colouration of polymers. It chemically bonds with them, the result being a lasting and uniform colouration. The unsaturated eosin derivative has the following formula:IMAGEIt is prepared through a two-hour interaction of eosin with allylbromide in organic solvent medium in the presence of a catalyst and at a temperature of 25 to 50 degrees C.