Chung Shan Institute of Science and Technology

Te-Chuan Chang

Yaw-Shun Hong

Jeng-Cheng Yang

Tseng-Rong Wu

Yie-Shun Chiu

Hsing-Tsai Huang

Yi-Chin Lin

Yu-Tan Wang

Gaw-Pying Wang

Pin-Yang Yu

The present invention discloses an acidic fluorine-containing hybrid having a uniform distribution of an organic and an inorganic components prepared by a sol-gel process. The organic component is a fluorine-containing poly(siloxane amideimide) having a good processing ability, gas permeability, mechanical properties, and chemical stability. The inorganic component is silica having good heat resistance and moisture resistance. The hybrid has excellent properties, such as a good film formation property, a high gas selectivity, a low dielectric constant, a good resistance to scraping, and a good transparency, etc., and can be used in making industrial products, such as gas detection films, sensors, encapsulation material, photoelectrical communication material, and biomedical material, etc.

Acidic fluorine-containing poly (siloxane amideimide) silica hybrids

A novel antioxidant has the advantages of both the hindered phenols and the phosphite antioxidant is prepared from phosphorus trichloride and 2,5-di-tert-butylhydroquinone, such as tetrakis-(2,5-di-tert-butyl-4-hydroxyphenyl)-2,5-di-tert-butyl-hydroquinonediyl diphosphite.

Phenolic phosphite antioxidants and polymer compositions containing said antioxidant

In the present invention, vinylimidazole and &lsqb;3-(methacryloxy)propyl&rsqb;trimethoxysilane are copolymerized to form a modified polyvinylimidazole, which then undergoes hydrolysis and condensation reactions with water and tetramethoxysilane to prepare a hybrid of polyvinylimidazole and silica. Experimental analyses show that covalent bondings exist between the modified polyvinylimidazole and silica in the hybrid.

Method of preparing a hybrid of polyvinylimidazole and silica

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Tao-Yuan, Taiwan

Te-Chuan Chang