Abstract: Modifier for heat transfer printing on cotton fabrics was prepared by semi-continuous emulsion polymerization process. The relationship between copolymer composition and color yield of printing products were explored, the effects of the different crosslinking monomers on properties of latex film, K/S value and the color fastness of printing products were studied. The results showed that the styrene (St) and acrylonitrile (AN) had significant impact on the K/S value of printing products. The satisfactory color depth and brilliance of printing products can be obtained when the amount of styrene and acrylonitrile were 30% and 5% respectively. The crosslinking monomer of polyethylene glycol (200) dimethyl acrylate (PEG (200) DMA) can be used as an ideal formaldehyde-free crosslinker for transfer printing modifier, and when the crosslinking monomer was 3%, the latex film presented lower dissolve-loss rate, superior breaking tenacity and elongation, and the printing products had excellent color fastness. The modified fabric was transfer printed with disperse red dye. The performance of printing products conform to the A grade of GB18401-2010 《National general safety technical code for textile products》.

Key words: semi-continuous emulsion polymerization, monomer, modifier, transfer printing