Preparation of cationic short branched-chain perfluoroalkyl-based water and oil repellent finish agent

In an attempt to find a way to solve the problem of environmental pollution resulting from perfluorooctanoic acid finish,a cationic water and oil repellent finish was prepared by emulsion polymerization using six F-n-butyl methacrylate(FMA),methyl methacrylate(MMA) and butyl methacrylate(BMA) as monomers,FK-300B and cetyl trimethylammonium bromide as emulsifier,and APS as initiator.The results showed that when molar ratio of FMA,MMA and BMA was 2∶1∶1,weight ratio of initiator and monomers was 0.25%,weight ratio of emulsifier and monomers was 10%,the contact angle of the fabric treated with the prepared finish agent was the largest,i.e.,131.° FT-IR analysis showed that the finish agent consisted of three monomers.The particles were mainly in the range of 20-110 nm.The prepared latex had a good dispersibility and stability.