Synthesis and performance of polyacrylate latex modified with double terminated acryloyloxy-propyl polysiloxane

A silicone modified polyacrylate latex was synthesized with double terminated acryloyloxypropyl polysiloxane as modifier and applied to pigment printing. The effects of addition methods of modifier and its dosages on the properties of the modified latex and latex film were studied,and the properties of the latex,film and pigment printing were measured,and compared with those of the polyacrylate latex modified with double terminated acryloyloxy-polyether polysiloxane. The results showed that when the modifier was mixed with acrylate monomer before addition and its dosage was 8% to the total mass of acrylate monomers,the monomer conversion of emulsion polymerization was higher,and the agglomerate rate was lower; the particle size of the emulsion was about 62 nm and its distribution was narrow; and the modified film had low water absorption and higher fracture work,and its pigment printed fabric had good color fastness and soft handle. Compared with the polyacrylate latex modified with double terminated acryloyloxy-polyether polysiloxane,it had better hydrophobic and tensile properties,therefore its pigment printed fabrics had better color fastness to wet rubbing.