National Chi Nan University

Great Chain Chemical Ltd

Yao-Chih Lu

Long-Li Lai

Cheng-Hua Lee

Ya-Lin Chang

The present invention relates to a silicon dioxide composite particle with far-infrared radioactivity, which is formed by the hydrolysis, condensation and polymerization of an organic silane precursor having the structure of the formula (I) with a tetra-alkoxysilane. The high stability of organic silane precursor compounds and the low biotoxicity of silicon dioxide composite particles make the present far-infrared radioactive silicon dioxide composite particles of great potential for extensive use in related bio-products.A-R&#x2014;Si(OR)&#x2003;&#x2003; Formula (I)

Silicon dioxide composite particle with far-infrared radioactivity; precursor of the same and application thereof

Disclosed is an azo compound represented by Formula (I), in which Ris hydrogen or methyl, Ris hydrogen or methyl, and Ris hydrogen, an unsubstituted linear alkyl group of from 1 to 4 carbon atoms, or an unsubstituted branched alkyl group of from 1 to 4 carbon atoms. This disclosure also provides a black dye composition including the azo compound represented by Formula (I).

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Puli, Taiwan

Yao-Chih Lu