Organophosphorus compound and flame retardant agent comprising same, and method for producing organophosphorus compound

Abstract

The present invention addresses the problem of providing: a novel organophosphorus compound which can impart flame retardancy to an amorphous resin without deteriorating the heat resistance and transparency of the amorphous resin even when added to the amorphous resin in a smaller amount, and which can be used for wide varieties of resins; a flame retardant agent comprising the organophosphorus compound; and a method for producing an organophosphorus compound. An organophosphorus compound represented by general formula (1) (wherein R1 and R2 independently represent a hydrogen atom, an alkyl group having 1 to 15 carbon atoms, an aryl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 15 carbon atoms, or an alkylaryl group having 7 to 15 carbon atoms; R3 and R4 independently represent an alkyl group having 1 to 15 carbon atoms, an aryl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 15 carbon atoms, an alkylaryl group having 7 to 15 carbon atoms, an alkoxy group having 1 to 15 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, an aralkyloxy group having 7 to 15 carbon atoms, or an alkylaryloxy group having 7 to 15 carbon atoms, provided that R3 and R4 may be bound to each other to form a ring; and m and n independently represent 1, 2, 3 or 4).

Description

technical field [0001] The present invention relates to an organophosphorus compound, a flame retardant containing the same, and a method for producing the organophosphorus compound. Background technique [0002] Conventionally, halogen-based flame retardants have been widely used as representative flame retardants for flame retardants used in thermoplastic resins. However, since halogen-based flame retardants generate toxic gas depending on incineration conditions, the use of halogen-based flame retardants has been limited in recent years from the viewpoint of the environment and safety. [0003] Therefore, phosphorus-based flame retardants are widely used as flame retardants considered to be more environmentally friendly than halogen-based flame retardants. Phosphate-based flame retardants such as bisphenol A condensed phosphoric acid diphenyl ester and resorcinol condensed phosphoric acid di(xylyl) ester are known as phosphorus-based flame retardants. [0004] However, ...

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Problems solved by technology

[0021] However, the conventional method of reacting DOPO with dihalogenated ethane or ethylene glycol requires a step of removing catalysts, halogen compounds, etc., which is disadvantageous from an economic point of view.

In particular, organophosphorus compounds containing two DOPO structures are usually crystalline solids with low solubility in solvents, so simple purification methods such as distillation or recrystallization cannot be applied, and they need to be repeatedly performed exclusively with water or organic solvents Slurry washing

Therefore, a large amount of waste liquid will be produced, which is extremely unfavorable for industrial implementation

[0022] In addition, in the addition reaction of P(O)-H bonds and carbon-carbon unsaturated bonds, a catalyst or catalyst residue removal process is also required, which is extremely unfavorable for industrial implementation.

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