Chung Shan Institute of Science and Technology

Tseng-Rong Wu

Wen-Chiung Su

Shean-Jeng Jong

Yuen-Hsin Peng

Chong Ma

Te-Chuan Chang

Chin-Shang Sheng

Yi-Chin Lin

Pin-Yang Yu

A method for preparing an arylphosphonite antioxidant of the formula (I) below is disclosed, wherein Ar is First, the reactants 2-phenylphenol and phosphorus trichloride are heated under the existence of a zinc chloride catalyst for producing 6-chloro-6H-dibenz[c,e][1,2]oxaphosphorin (CDOP) of the formula (II) below:  Next, the excess phosphorus trichloride is removed. Finally, an organic solution of a di-hydroxylphenol compound of the formula (III),Ar&#x2014;(OH)&#x2003;&#x2003;(III)wherein Ar is defined as the above, is heated with the CDOP of formula (II) to form the product of the formula (I).

Method for preparing arylphosphonite antioxidant

Ferrocenecarbonyl and toluene bromide are reacted in an ether solvent and in the presence of magnesium metal as a catalyst. The liquid portion of the reaction mixture is introduced into a silica gel column, wherein the weak acidity of the silica gel is able to dehydrate the reaction intermediate ferrocenyl alcohol product. The column is eluted with ethyl acetate/n-hexane, and after evaporating the solvent from the eluate collected, a purified ferrocenyl substituted styrene is obtained.

Method for the preparation of ferrocenyl substituted styrene

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

Bis-(pentaerythritol phosphate) phosphoric acid is prepared by mechanochemical synthesis including ball milling a mixture containing P O , pentaerythritol, an alkyl benzene having one or two C1-C5 alkyl groups, and a metal halide catalyst, in a ball mill as a reactor and at a temperature of room temperature to 150&deg; C. Melamine is then reacted with the resulting bis-(pentaerythritol phosphate) phosphoric acid to form a product of melamine salt thereof.

Growing community of inventors

Tao-Yuan, Taiwan

Tseng-Rong Wu