MISCHUNGEN VON OPTISCHEN AUFHELLERN.

摘要

Mixtures of optical brighteners, consisting of from 1 to 99 parts by weight of a compound of the formula 1 where R1 and R2 are identical or different and each is -CN, -COOCH3 or -COOC2H5, and from 99 to 1 parts by weight of one or more compounds of the formulae 2 to 10