Relationship between structure of light stabilizer and light fastness of Disperse Red TR-16 on cotton

In order to study the relationship between light stabilizer's structure and the light fastness of Disperse Red TR-16 on cotton,12 light stabilizers of four main categories were selected to treat the cotton fabric which had been dyed with Disperse Red TR-16.The light fastness of the samples was compared.The UV absorption spectra of the light stabilizers and Disperse Red TR-16 as well as the UV transmittance of the dyed cotton fabric before and after illumination were measured.The results showed that good light stabilizer has the following characteristics:maximum UV absorption covering the UV absorption band of Disperse Red TR-16,parallel surface formed with the fiber,well covering the dye molecules,strong intermolecular bonding with the dye molecules,improving the distribution stability of the UV absorber.