Preparation of a mixture of 1-(2-chloro) styryl-4 (2-cyano) styrylbenzene and 1,4-bis (2-cyanostyryl) benzene

摘要

The present invention relates to a method for preparing a mixture of high-lightfast synthetic fiber which is dependent on the whole amount of the compound of formula (I) and (II) as an alternative dye having whiteness and fluorescence ability similar to fluorescent whitening agent Cl tongue 199 And a novel process for producing the material at a high purity and a bone marrow ratio by a simple reaction process using a material of low cost as a raw material.