Abstract: A reactive UV-absorber, 4-(4,6- dichloro-1,3,5-triazin-2- yloxy)-2-hydroxyphenyl) (phenyl)methanone (UV-DTHM）was successfully synthesized by reaction of xy benzophenone(UV-O) with Trichloro-1,3,5-triazine(TCT), and was applied to anti-UV finishing of cotton fabrics. Padding temperature in finishing liquor of UV-DTHM, steaming time, concentration of UV-DTM was discussed. Obtaining the finishing process of the optimized conditions. The highest UPF(46.5) can be get in the conditions of 60℃, 2% o.w.f UV-DTHM and 60min, and after 30 soaping, UPF remain 34.2 which showed fairly good fastness to soaping.

Key words: 2,4-dihydroxybenzophenone, cyanuric chloride, ultravioet absorbent, cotton fabrics, fastness to soaping