Phosphorus-containing flame retardant and preparation method thereof

A phosphorus flame retardant and flame retardant technology are applied in the field of phosphorus-containing flame retardants and their preparation, which can solve the problems of easy formation of cyclic by-products and easy self-polymerization, etc. The effect of reducing the reaction cost
CN103772740BActive Publication Date: 2016-01-20SHOUGUANG WEIDONG CHEM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHOUGUANG WEIDONG CHEM
Publication Date
2016-01-20

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Abstract

The present invention relates to the field of organic synthesis, and provides a phosphorus-containing flame retardant and a preparation method thereof. The phosphorus-containing flame retardant has a chemical formula such as formula (i), and the preparation method includes the following steps: (1) combining DOPO and Dibasic carboxylic acid was added to toluene, stirred and heated to 110±2°C, reacted for 2 to 6 hours, stopped heating, and filtered the reacted solution to obtain a white solid, dried to obtain DOPO dibasic carboxylic acid derivative (2) Dissolve DOPO dibasic carboxylic acid derivatives in 2±0.2mol / L potassium hydroxide solution at a temperature of 0-40°C and stir for 1.5-2.5 hours to generate DOPO dibasic carboxylic acid derivatives Potassium salt; (3) Add a phase transfer catalyst and a halogenated alcohol to the solution prepared in step (2), react for 4 to 8 hours, pour into a separating funnel to separate layers, and remove the lower layer to obtain the phosphorus-containing flame-retardant agent. (i).
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Description

Technical field

[0001] The present invention is an organic synthesis field, which involves a phosphorus -containing flame retardant and its preparation methods. Background technique

[0002] 9,10-dihydrogen-9-oxygen-10-phosphorus-10-oxides (referred to as dopo), which is a new type of flame retardant intermediate.Its structure contains P-H bonds, which is very active to olefins, epoxy bonds, and cymbals, and can reflect many derivatives.DOPO and its derivatives are introduced in the form of phenyl ring and the Philippines because the molecular structure contains the phenyl ring and the Philippines.High stability and better flame retardant performance.DOPO and its derivatives can be used as response and added flame retardants. The synthetic flame retardant is halogentian, smoke -free, non -toxic, non -migration, and lasting flame retardant performance.Can be used for flame retardant treatment of linear polyester, polyamide, epoxy resin, polyurethane and other polymer materials.For...

Claims

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