Abstract: Disclosed are a hybrid dialkylphosphinate salt, a method for preparing same, and use thereof. The hybrid dialkylphosphinate salt is selected from at least one of the compounds represented by Formula (I). The hybrid dialkylphosphinate salt of Formula (I) provided herein features a low required loading level, high flame retardant efficiency for various polymers, and good thermal stability. The present invention overcomes the disadvantage of low flame retardant efficiency of diethylphosphinate in polymers as well as low thermal stability and large dust of dipropylphosphinate. The hybrid dialkylphosphinate salt of Formula (I) can be widely applied to flame retardant polymers which require high-temperature processing.

Abstract: Disclosed are a hybrid dialkylphosphinic acid salt, and a preparation method therefor and an application thereof. The hybrid dialkylphosphinic acid salt is at least one of compounds represented by Formula (I). The hybrid dialkylphosphinic acid salt of Formula (I) provided herein features a low required loading level, high flame retardant efficiency for various polymers, and high economic efficiency. The present invention overcomes the disadvantage of low flame retardant efficiency of diethylphosphinate in polymers as well as high volatility and low flame retardant efficiency for polyesters of diisobutylphosphinate. The hybrid dialkylphosphinate salt of Formula (I) can be widely applied to flame retardant polymers which require high-temperature processing.

Abstract: The present provides a process for preparing dialkyl phosphinate, comprising: (1) firstly adding 0-99% of the total weight of phosphinic acids and/or salts thereof and a solvent into a reaction kettle; (2) in the reaction kettle in the presence of alkene and initiator, continuously adding 1-100% of the total weight of the phosphinic acids and/or salts thereof into the reaction system, during the addition process, when the mole contents of monoalkyl phosphinic acids and/or salts thereof account for 10% or less of the total molar contents of phosphorus in the reaction system, stopping adding the phosphinic acids and/or salts thereof. Also providing a dialkyl phosphinate flame retardant prepared by above preparation process.

Abstract: The present provides a process for preparing dialkyl phosphinate, comprising: (1) firstly adding 0-99% of the total weight of phosphinic acids and/or salts thereof and a solvent into a reaction kettle; (2) in the reaction kettle in the presence of alkene and initiator, continuously adding 1-100% of the total weight of the phosphinic acids and/or salts thereof into the reaction system, during the addition process, when the mole contents of monoalkyl phosphinic acids and/or salts thereof account for 10% or less of the total molar contents of phosphorus in the reaction system, stopping adding the phosphinic acids and/or salts thereof. Also providing a dialkyl phosphinate flame retardant prepared by above preparation process.