Preparation of Cationic Fluorinated Styrene-Butyl Acrylate Graft Copolymer and Its Application as Surface Sizing Agent

The corrugated board surface sizing agent was synthesized by soap-free radical polymerization using styrene(St),butyl acrylate(BA),dodecafluoro-heptyl methacrylate(FM),N-hydroxymethyl acrylamide(HMAM) and dimethyl diallyl ammonium chloride(DMDAAC) as graft monomers in oxidation-reduction initiator system,and the surface sizing agent was characterized with infrared spectrum(FTIR),static contact angle and SEM.The optimum synthesis conditions are as follows:m(persulfate):m(starch) dosage being 0.5,m(monomer):m(starch) dosage being 2,m(St):m(BA) dosage being 2.5,and FM dosage being 0.3%.The sizing degree is more than 5 minutes when the sizing content is 0.6%.