Distyrylebiphenyles, process for their preparation and their use for the optical brightening of organic materials, as well as detergent compositions, textile treating compositions and products for the after-treatment of laundry containing them

摘要

the distyrylbiphenyle formulawherein x and x 'independently of the direct link, oxygen, sulfur, - o -, c1 - 3 - alkylen con (r4) -, - con (r4) - o - c - 3 - alkylen - coo -, - coo - or - oco -, which