Lotion Polymerization of Organosilicon

The silicone modified acrylic polyurethane lotion was prepared by lotion polymerization. The morphology of lotion particles was analyzed by transmission electron microscope, and it was proved that the lotion particles had a core-shell structure. The effects of the type and amount of silicone monomer on the mechanical properties, gloss and heat resistance of lotion after film formation were discussed. The semi transparent silicone modified polyacrylate micro lotion was synthesized by core-shell emulsification with acrylic acid 2-ethylhexyl ester, butyl ester and other soft monomers as the shell, and Methyl methacrylate, acrylic acid, styrene and other hard monomers as the core under the condition of low surfactant content. Experiments have shown that the product has good film-forming properties, permeability, and affinity. It can be used as a printing adhesive for finishing polyester fabrics, with a soft feel, improved moisture permeability, washability, and color enhancing effect.

A stable lotion with poly (Dimethylsilane) as the core and poly (methyl methacrylate)/Butyl acrylate as the shell was synthesized by core-shell lotion polymerization with monomer dropping method. The results indicate that when vinyl siloxane is used as the core, there is an uneven phenomenon on the surface of the rubber particles due to cross-linking and uranylation. With methacryloyloxypropyl Trimethoxysilane as functional monomer, organosilicon groups were grafted onto the surface of polystyrene lotion particles through lotion polymerization. The results showed that the pH value and the property of emulsifier had a greater impact on the stability of lotion, In addition, the silicone modified acrylate lotion with polymethacrylate ®/Butyl acrylate as the core and methacryloyloxypropyltrimethoxy silicone as the shell was also prepared by this method. The core-shell lotion of polyorganosiloxane Glycidol methacrylate (GMA) was synthesized by one-step method. From the analysis of reactive polymerization rate and swelling degree between monomers, the probability of various monomers reacting with polyorganosiloxane to form core-shell structure was obtained. With methacryloyloxypropyl Trimethoxysilane as the coupling agent, a core shell emulsion with polyacrylate as the core and polydimethylsiloxane as the shell was synthesized by a semi continuous method. The results showed that through X-ray photoelectron spectroscopy and contact angle measurement, it was verified that the silicone functional monomer had been attached to the surface of the acrylate core, and the thickness of the shell layer was closely related to the amount of silicone functional monomer added, And through comparative experiments, it was verified that the introduction of coupling agents makes the core-shell structure more secure.

The microphase composite polymer lotion with "hard core" and "soft shell" structure was synthesized with methacrylic acid, Butyl acrylate, acrylic acid 2-ethylhexyl ester, etc. as monomers, and persulfate as initiator. The test found that the core/shell structure of latex particles could be obtained by dropping shell monomer directly into the core lotion or dropping shell monomer pre emulsion under appropriate control of feeding speed, But dropping shell monomer directly into the core component lotion requires a longer feeding time, which is prone to coagulation. The morphology of lotion particles was further studied by the author, which showed that the latex particles synthesized in lotion had the expected shell/core structure, and there was a Chemical bond between the shell/core. The aging resistance, water resistance, and mechanical properties of the film-forming material have significantly improved.

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