Synthesis and Application of Polyurethane Modified Fluorinated Polyacrylate

A polyurethane modified fluorinated polyacrylate( PUAF) was prepared from 2-( perfluorohexy) ethyl acrylate( C6F) and the carbon-carbon double terminated polyurethane prepolymer( PUA) which was obtained by reaction of IPDI,PEG and hydroxypropyl acrylate( HPAA)in the presence of azobisisobutyronitrile as a radical polymerization initiator. The chemical structure,film morphology and application performance of PUAF were studied by infrared spectroscopy,field spectrum scanning electron microscopy( FE-SEM),etc. PUAF could form hydrophobic membrane on the fiber or fabric surface which caused the contact angle of water on those substrates to increase to133. 5°. And when the dosage of PUAF in solution was 1 g in 100 g ethyl acetate,and when the polyester fabric was treated by such a PUAF solution and then dried at 180 ℃ for 1. 5 min,the hydrophobicity of the treated fabric could reach 90; meanwhile the oil-repellent grade reached grade 6.