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Preparation method of inorganic aluminum hypophosphite and application of inorganic aluminum hypophosphite in flame-retardant PBT (polybutylene terephthalate)

A technology of inorganic hypophosphorous acid and aluminum hypophosphite, which is applied in the field of flame retardant materials to achieve the effects of improving absorption capacity, improving surface state and physical properties, and good adsorption

Active Publication Date: 2022-02-25
广东宇星阻燃新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing inorganic aluminum hypophosphite to solve the problem of phosphine release from aluminum hypophosphite and make it harmless to the environment and workers

Method used

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  • Preparation method of inorganic aluminum hypophosphite and application of inorganic aluminum hypophosphite in flame-retardant PBT (polybutylene terephthalate)
  • Preparation method of inorganic aluminum hypophosphite and application of inorganic aluminum hypophosphite in flame-retardant PBT (polybutylene terephthalate)
  • Preparation method of inorganic aluminum hypophosphite and application of inorganic aluminum hypophosphite in flame-retardant PBT (polybutylene terephthalate)

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take hydroxyapatite and dissolve it in 0.5mol / L sulfuric acid, then add inorganic aluminum hypophosphite, wherein hydroxyapatite; aluminum hypophosphite=0.002:1, ultrasonically disperse for 10min to make aluminum hypophosphite suspension; Add ammonia water dropwise to the aluminum suspension, adjust the pH to 12, react at a constant temperature at 60°C for 5 hours, wash with water and dry after fully reacting to obtain a composite material A of hydroxyapatite-coated aluminum hypophosphite. Take the composite material A in In a saturated sodium metaaluminate solution, where sodium metaaluminate:composite material = 0.005:1, adjust the reaction temperature to 60°C, add hydrogen peroxide solution drop by drop, adjust the pH to 7, the reaction time is 1h, and the stirring speed is 1500r / min, after the completion of the reaction, obtain inorganic aluminum hypophosphite A through filtration and drying;

[0029]

[0030] Take the above-mentioned flame-retardant PBT materia...

Embodiment 2

[0032] Take hydroxyapatite and dissolve it in 0.1mol / L sulfuric acid, then add inorganic aluminum hypophosphite, wherein hydroxyapatite: aluminum hypophosphite = 0.005:1, ultrasonically disperse for 30min, and make aluminum hypophosphite suspension; Add ammonia water dropwise to the aluminum suspension, adjust the pH to 10, react at a constant temperature at 80°C for 6 hours, wash with water and dry after fully reacting to obtain a composite material B of hydroxyapatite-coated aluminum hypophosphite. In a saturated sodium metaaluminate solution, where sodium metaaluminate:composite material=0.015:1, adjust the reaction temperature to 40°C, add sulfuric acid solution drop by drop, adjust the pH to 8, the reaction time is 3h, and the stirring speed is 500r / min, after the reaction is completed, obtain inorganic aluminum hypophosphite B by filtering and drying;

[0033]

[0034] Take the above-mentioned flame-retardant PBT material in a high-speed mixer, and stir for 5 minutes...

Embodiment 3

[0036] Take hydroxyapatite and dissolve it in 0.3mol / L sulfuric acid, then add inorganic aluminum hypophosphite, wherein hydroxyapatite:aluminum hypophosphite=0.003:1, ultrasonically disperse for 15min to make aluminum hypophosphite suspension; Add ammonia water dropwise to the aluminum suspension, adjust the pH to 11, react at a constant temperature at 100°C for 8 hours, wash with water and dry after fully reacting to obtain a composite material D of hydroxyapatite-coated aluminum hypophosphite, and take the composite material D in In the saturated sodium metaaluminate solution, where sodium metaaluminate:composite material=0.02:1, adjust the reaction temperature to 55°C, add sulfuric acid solution drop by drop, adjust the pH to 7, the reaction time is 2.5h, and the stirring speed is 500r / min, after the completion of the reaction, obtain inorganic aluminum hypophosphite C through filtration and drying;

[0037]

[0038] Take the above-mentioned flame-retardant PBT materia...

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Abstract

The invention relates to the technical field of flame retardance, in particular to a preparation method of inorganic aluminum hypophosphite and application of the inorganic aluminum hypophosphite in flame-retardant PBT (polybutylene terephthalate). The inorganic aluminum hypophosphite is obtained from aluminum hypophosphite coated with hydroxyapatite and aluminum hydroxide, and the hydrogen phosphide absorption capacity is improved. Hydroxyapatite and aluminum hydroxide both have flame-retardant effects and can perform synergistic flame retardance with inorganic aluminum hypophosphite. Through application of inorganic aluminum hypophosphite in flame-retardant PBT, the release amount of phosphine is lower than 0.08 PPM / 200g, which shows that the flame-retardant effect and the hydrogen phosphide release capacity of the inorganic aluminum hypophosphite are obviously superior to those of traditional inorganic aluminum hypophosphite.

Description

technical field [0001] The invention relates to the technical field of flame retardant materials, in particular to a method for preparing inorganic aluminum hypophosphite and its application in flame retardant PBT. Background technique [0002] Inorganic aluminum hypophosphite, a new type of "halogen-free" flame retardant, has a good flame retardant effect due to its high phosphorus content, and its application range has become more and more extensive in recent years. Weaknesses, when used in plastics that require high temperature processing, such as ABS, PBT, PET and other plastics, inorganic aluminum hypophosphite will release phosphine that is harmful to the environment and workers during processing, Al(H 2 PO 2 ) 3 →AlPO 4 +PH 3 , thus limiting the application of inorganic aluminum hypophosphite in the field of flame retardants. Contents of the invention [0003] The invention provides a method for preparing inorganic aluminum hypophosphite to solve the problem of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/32C08K9/10C08K3/22C08L67/02C08K7/14C08K5/3492
CPCC08K3/32C08K7/14C08K9/10C08K5/34922C08K5/34928C08K3/22C08L2201/02C08K2003/2227C08K2003/325C08L67/02
Inventor 孔利权刘敏张文詹和孙
Owner 广东宇星阻燃新材股份有限公司
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