Study On Preparation And Color-deepening Property Of Organosilane/Polyacrylate Complex Emulsion

Polyester fibers are used widely. When dying polyester fibers fuscous color, the dyestuff always has low efficiency. The color of polyester fibers is affected by fiber size, refractive and the roughness surface of the fiber. Therefore the color-deepening of polyester fibers are very important. According to the methods of treating fibers with resin which has low refractive and making the surface of fibers rough, the organosilane/polyacrylate complex emulsion was prepared. Then the color-deepening and tactility effect of polyester textile were investigated.Seeded emulsion polymerization and semicontinuous process was adopted for preparing the polyacrylate grafted by polysiloxane and the core-shell polymer of polyacrylate mixed with polysiloxane. Then the color-deepening effect of polyester textile was studied. The relationship between color-deepening effect and polymer molecule structure or aggregation morphology was built.When the polyacrylate grafted by polysiloxane was prepared, with the objective of obtaining stable emulsion, we investigated the effect factors of polymerization technics including reaction temperature, reaction time, surfactant, emulsification methods of pre-emulsion, feeding time of pre-emulsion and dosages of seeded emulsion. The structure of polymer and morphologies of latex particles were characterized by IR, DSC and TEM. Then the effect of color deepening was reseached, which provide theory supervise for preparing color-deepening agent.When the core-shell polymer of polyacrylate was prepared, with the objective of obtaining stable, uniform-size core-shell polymer, the effect factors of polymerization technics, including reaction temperature, mixing speed, feeding time of shell monomer and surfactant content of shell, were investigated. The structure of polymer and morphologies of latex particles were characterized by IR, DSC and TEM. Then the effect of color deepening by shell monomer content and core-shell struction of latex particles was studied.Using the above-mentioned methods, two kinds of color-deepening agent were obtained, which had excellent color-deepening effect. The deepening degree was about 30%. After being finished by the core-shell polymer of polyacrylate mixed with polysiloxane, the tactility of polyester textile became much softer. However after being finished by the polyacrylate grafted by polysiloxane emulsion, the tactility of polyester textile didn't change a lot. We can improve it by blendingsoftener.