Synthesis of diacryloyl-terminated polysiloxane and properties of polyacrylate latex modified thereby

Diacrylamide-propyl-terminated polysiloxane( diAAp-PDMS) or diacryloyloxy-propylterminated polysiloxane( diAOp-PDMS) were synthesized by acylation reaction between acryloyl chloride and diamino-propyl-terminated polysiloxane or dihydroxy-propyl terminated polysiloxane,respectively,and applied in the synthesis of modified polyacrylate latex. Influences of synthetic factors on respective synthetic yields were investigated. The synthetic yields of two kinds of organosilicone monomers and properties of modified latex films and pigment printing were compared. The results showed that the reactivity of diamino-propyl-terminated polysiloxane was obviously higher than that of dihydroxy-propylterminated polysiloxane when being reacted with acryloyl chloride. Compared with diAOp-PDMS,the synthetic yield of diAAp-PDMS was higher. The diAAp-PDMS modified polyacrylate latex film had high hydrophobicity,low breaking tenacity,large breaking extension,and slightly-large break power. The colorfastness to crocking( dry and wet) of the diAAp-PDMS modified polyacrylate latex pigment printed fabric reached rating 4 or above,and its hand feeling become softer. The pigment printing property of the diAAp-PDMS modified polyacrylate latex was superior to that of diAOp-PDMS generally.