專利摘要 | 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--(OH) 2 (III)
wherein Ar is defined as the above, is heated with the CDOP of formula (II) to form the product of the formula (I).
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-(OH)2 (III) wherein Ar is defined as the above, is heated with the CDOP of formula (II) to form the product of the formula (I). |