| 摘要 |
<p>The invention relates to novel 4-styryl-4'-vinylbiphenyls of the formula <IMAGE> wherein the benzene rings A, B and C can carry non-chromophoric substituents and R3 is a second order non-chromophoric substituent, and R4 is hydrogen or a non-chromophoric substituent which cannot be a second order substituent, and also a process for obtaining them. These novel compounds can be used as fluorescent whitening agents for treating organic material of high molecular weight, preferably textile material, most preferably polyester fibres. The invention also discloses novel intermediates of the formula <IMAGE> wherein A, B and C are as defined above, which are formed during the production of the novel 4-styryl-4'-vinylbiphenyls, and also a process for obtaining them.</p> |
