Chemical Modification of Organosilicon and Acrylate
Jun 12, 2023
In recent years, with the continuous improvement of people's awareness of environmental protection, as well as the continuous improvement and development of polymerization theory and technology, people are increasingly calling for environment-friendly green chemical products. lotion polymerization has gradually developed into an important method for the synthesis of polymer compounds. The development of lotion polymerization technology started in the early 20th century. Because its system uses water as the continuous phase, it avoids the introduction of benzene, alcohol and other substances harmful to the environment, and has the characteristics of low viscosity, easy heat dissipation, easy reaction control, etc. These characteristics endow lotion polymerization with strong vitality. Therefore, organic modified acrylate lotion polymerization has attracted more attention.
The chemical modification method is to form random, graft and interpenetrating network copolymers according to different polymerization mechanisms and polymerization methods through the reaction of unsaturated bonds in organosiloxane monomers and active functional groups in acrylate monomers, so as to introduce organosilicon molecules into the molecular chain of acrylate polymers, so as to organically combine organosilicon and acrylate polymer molecules to form Chemical bond A method of achieving molecular level modification by modifying acrylic polymer in composition. By chemical modification, the compatibility between polysiloxane and polyacrylate can be improved, and the surface migration of organic silicon molecular chains and the micro morphology of organic silicon can be controlled to a certain extent. The two are evenly dispersed, resulting in the preparation of organic silicon modified acrylate polymers with excellent stain resistance and waterproof performance. They have various excellent properties that are not found in simple physical blending of organic silicon polyacrylate polymers, and have more application prospects.
The preparation of organic leaf modified acrylate lotion by copolymerization is to copolymerize organic siloxane with active group (carbon carbon double bond, etc.) and acrylate monomer to generate random, graft, block or interpenetrating network lotion polymers, so as to obtain a stable organic silicon modified acrylate lotion system, and greatly improve the performance of the modified polymer. According to different Chemical bond modes, types of organosilicon and lotion polymerization technologies, chemical modification can be divided into: condensation polymerization, hydrosilylation, free radical copolymerization, conventional lotion polymerization, soap free lotion polymerization, core-shell lotion polymerization, lotion interpenetrating polymer network and microemulsion polymerization.
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