Synthesis of double terminated acryloyloxy-polyether silicone oil and property of its modified polyacrylate latex

A double-terminated acryloyloxy-polyether silicone oil was prepared by esterification reaction from acrylic acid and polyether silicone oil with double terminated hydroxyl groups.The influences of reaction factors such as amount of catalyst,reaction temperature and time,dosage of solvent and inhibitor on esterification rate were investigated,and the product was characterized by the structure using FT-IR and 1H-NMR and then was applied in the preparation of silicon-modified polyacrylate latex.The properties of silicon-modified polyacrylate latex were tested along with its pigment printing behavior.The results showed that the optimal esterification conditions were as follows: amounts of catalyst and solvent were 5% and 70% of total reactant mass,respectively,dosage of inhibitor was 0.75% of the amounts of acrylic acid,reaction temperature was 110 ℃ and reaction time was 4 h.FT-IR and 1H-NMR analysis indicated that the structure of esterified product was acryloyloxy-polyether silicon oil.Hydrophobicity of the modified polyacrylate latex film was enhanced obviously with breaking tenacity decreased slightly,breaking extension increased significantly,and work of break increased a little.When the modified polyacrylate latex was used in pigment printing,the dry and wet rubbing fastness of the pigment printed fabric reached rating 4 or above,and its handle became softer.