Guangzhou Longkai Chemical Co., Ltd.
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Development of Organic and Inorganic Hybrid Coatings under the Action of Silane Coupling Agent
Author:LongKom  Time:2018-1-30

Hybridization of organic phase compounds and inorganic phase compounds is one of the important methods of material modification. At present, the hybridization of macromolecule organic compounds and silicon compounds has been paid attention to. The advantages of this process are low VOC or zero VOC emission, which is conducive to environmental protection and energy saving. In coatings, adhesives, and silicon compounds, the hybridization of organic phase compounds and inorganic phase compounds is one of the most important methods of material modification. Textile and other aspects have broad prospects.

Organic and inorganic hybridization processes include:
1. Simple mixing. The operation is simple, but the effect is not satisfactory.
2. Sol gel method. According to the different precursors of reaction, there are several types, such as inorganic phase network formed in the presence of organic polymer, organic monomer polymerization in the presence of inorganic phase, and interpenetrating network formed in the presence of organic phase and inorganic phase. This kind of technology is more complex, but the effect is better.
3. Using colloidal SiO2 particles as the core, the core shell composite emulsion prepared by ordinary emulsion polymerization is an extension of the core shell polymerization process.

4. By coupling agents, the silica sol and emulsion can be combined together. The process is simple and practical, and needs to be deepened and perfected. In this paper, silane coupling agent is chosen to prepare organic-inorganic hybrid coatings. The process is simple, the reaction conditions are mild and easy to control. Systematic technological conditions tests were carried out to change the technological parameters so as to realize the performance tailoring of coatings.

The organic-inorganic composite coating was prepared by mixing silane coupling agent, acrylic emulsion and silica sol with appropriate additives. The physical, chemical and chemical stability of the composite coating were better than that of pure acrylic emulsion and silica sol / polyacrylate. The effects of the amount of coupling agent, the optimum proportion of compound and additives were tested.

Organic-inorganic hybrid polymer emulsion coatings were prepared by using silane coupling agent and simple process. Their stability and coating physicochemical properties were better than those of simple blend emulsion and acrylic emulsion.
The main components of the composite coating are silane coupling agent 0.1% ~ 0.2%, silica sol 11% ~ 20%, acrylic emulsion 75% ~ 90%, deionized water and auxiliary amount.