Development of organic-inorganic hybrid coatings by the sol-gel technology

We developed two new types of organic-inorganic hybrid coatings using sol-gel technology. They have excellent durability such as weather resistance, soil resistance, heat resistance, scratch resistance etc. Many applications such as super weather resistant paint for exterior walls, heat resistant paint, binder for textiles or non-woven fabrics etc. have been achieved. Organically modified polysiloxane was polymerized by hydrolysis and condensation of alkoxyalkylsilane in the presence of colloidal silica or colloidal alumina. We successfully improved the pot life of coatings based on organic synthesis. We also studied the structure of polysiloxanes using NMR. The organic-inorganic hybrid polymer was prepared by using polyacrylate having alkoxysilyl groups, alkoxyalkylsilane and Al-compound as an effective catalyst. The structure of the hybrid was assumed by using GPC analysis, DMTA analysis and SEM. This hybrid could be formed as a thick (>100 mu m), uniform, transparent and flexible film by coating. This him can be cured at wide range of temperature (room temp approximate to 200 degrees C) using a special catalyst. It has been applied as super weather resistant paint as well as for other uses.