Abstract
To investigate the effective utilization of FBAs especially in the washing process of textile materials and to prevent the environmental contamination, properties of several reactive-type FBAs-fixation, ratio, whitening effect, and wash fastness-were examined and compared with theseof corresponding direct-type FBAs. Both series are triazinyl stilbene type FBAs. The results are summarized as follows :
1. The fixation ratios of each reactive-type FBA on cotton differ from the substituted groups on cyanuric rings of each FBA. But these ratios are almost equal to the adsorption ratio of corresponding direct-type FBAs.
2. Desorptions of FBA from the reactive-type FBA whitened samples are very little, and wash fastnesses are extremely superior to that of corresponding direct-type FBAs.
3. On the other hand, maximum reflectance obtained by the reactive-type FBAs was about 138%. These values are compared unfavourably with those of the direct-type FBAs.
Now we are investigating different series of reactive-type FBAs which have superior whitening effect together with excellent wash fastness.
