Abstract

Corn starch modified polyacrylate emulsion was prepared by semi-continuous seed emulsion polymerization with methyl methacrylate (MMA), butyl acrylate (BA) and oxidized starch (OSt) as the main raw materials and was subsequently used for leather finishing. The structure of starch/polyacrylate emulsion film was characterized by FT-IR, XPS and 1HNMR and the properties of leather coated with the emulsion were tested. The results showed that after corn starch was oxidized, the oxidized starch reacted with acrylate monomers, and the polyacrylate emulsion modified using oxidized starch was successfully prepared. Compared with a polyacrylate emulsion, the particle size distribution of modified composite emulsion is more concentrated. After finishing with polyacrylate emulsion containing oxidized starch, the leather was folded 20,000 times without developing cracks; In the wear resistance test, the gray scale of dry-wiped interlining cloth increased from 4.0 to 5.0, and the gray scale of wet-wiped interlining cloth increased from 3.5 to 4.5; The softness increased from 4.35 mm to the highest value at 5.23 mm; The tensile strength increased from 523N to 581N; The yellowing resistance is also obviously improved.