Divinyl compounds and chromogenic recording-material prepared by using thereof

摘要

Disclosed herein are novel divinyl compounds represented by the formula (I): <IMAGE> (I) and a recording-material prepared by utilizing the divinyl compounds. The present divinyl compound is in itself almost colorless, extremely stable in the atmosphere and develops rapidly blakish color by a developer. The color image given by the present divinyl compound is excellect in light-resistance and moisture-resistance and the letters developed can be read by an optical letter-reading apparatus or a barcord reading apparatus.