Synthesis and Properties of Multifunctional Light Stabilizer Based on Triazine-Stilbene Fluorescent Brightening Agents

The multifunctional light stabilizer was synthesized through joining the 2,4-dihydroxybenzophenone( a ultraviolet absorber),triazine-stilbene fluorescent brighteners and the series of polyethylene glycol( PEG) in the same molecule with cyanuric chloride as the crosslinking monomer.The molecular structures were characterized by means of IR spectra and1 HNMR,the physical properties were examined by UV spectra and photoluminescence( PL) spectra,and the application effect of the light stabilizer in paper sheet was tested. The results show that the active ingredient of triazine-stilbene fluorescent brighteners( VBL) was 28. 86%,while the active ingredient of the multifunctional light stabilizer( FBs- 400) was 61. 8% after illumination. The fluorescence was quenched when the concentration of the light stabilizer was over 1 g /L,and its range of application is wider than that of VBL( 1 × 10- 5kg /L). The brightening effect and light stability of the multifunctional light stabilizer are nice in the performance of application. At the same time,its light stability is significantly improved.