METHOD FOR PRODUCING PHOSPHORUS FLAME RETARDANT COMPOSITION

METHOD FOR PRODUCING PHOSPHORUS FLAME RETARDANT COMPOSITION

  • CN 104,987,531 A
  • Filed: 12/17/2009
  • Published: 10/21/2015
  • Est. Priority Date: 01/19/2009
  • Status: Active Application
First Claim
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1. the manufacture method of a phosphorus flame retardant composition, it is characterized in that, described phosphorus flame retardant composition comprises the aromatic diphosphate compound shown in general formula (I), and as impurity general formula (II) shown in the content with the phosphorus compound of hydroxy phenyl be determined as 1 below area % by gel permeation chromatography (GPC), the manufacture method of described phosphorus flame retardant composition comprises following operation:

  • As the 1st operation, the aromatic monohydroxy compound at ortho position with sterically hindered group shown in general formula (III) and trihalophosporus oxide is made to react in the presence of a lewis acid catalyst, obtain the diaryl halogenated phosphate shown in general formula (IV)Then, as the 2nd operation, make in the presence of a lewis acid catalyst the 1st operation obtain diaryl halogenated phosphate with relative to diaryl halogenated phosphate in stoichiometry for the aromatic dihydroxy compound shown in the logical formula V of equivalent reactsFor equivalent is tried to achieve by the amount of the reaction mixture after the 1st operation and halogen concentration thereof in described stoichiometry,

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