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Microencapsulated inorganic hypophosphite flame retardant and preparation method thereof

A hypophosphite and microencapsulation technology, applied in microcapsule preparations, microsphere preparation and other directions, can solve problems such as limiting the value of commercialization, and achieve the effects of improving processing performance, good compatibility and simple process

Active Publication Date: 2014-08-20
苏州安鸿泰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a highly efficient halogen-free phosphorus-based flame retardant, red phosphorus can be used with its excellent flame retardant efficiency, but its commercial value is limited due to its color and easy spontaneous combustion.

Method used

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  • Microencapsulated inorganic hypophosphite flame retardant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In the reactor, add 9.0kg of inorganic aluminum hypophosphite, 0.6kg calcium stearate and 100kg of water, stir to make it uniformly dispersed, then add 0.5kg of cyanuric acid and 0.1kg of sodium carbonate, and the reaction kettle The temperature was raised to 80°C to dissolve the cyanuric acid. After 20 minutes, 0.55kg melamine and 0.1kg phenyltrichlorosilane were alternately and slowly added to the reaction kettle several times. During this process, hydrogen was oxidized dropwise. Sodium solution controls the pH of the reaction system in the range of 6-8. After the addition, raise the reaction temperature to 100°C, keep stirring at this temperature, and react for 10 hours to obtain a viscous paste, which is filtered and dried 1. After being pulverized, a powdered microencapsulated inorganic aluminum hypophosphite flame retardant product is obtained.

[0041] Such as figure 1 As shown, the microencapsulated inorganic aluminum hypophosphite flame retardant product ...

Embodiment 2

[0045] Add 1.2kg of phosphoric acid to the reaction kettle, preheat at 80°C for 10 minutes, then slowly add 0.4kg of pentaerythritol, raise the temperature to 120°C, start stirring, and get a light yellow viscous liquid after 4 hours of reaction, which is pentaerythritol phosphoric acid ester.

[0046] Get another reactor, add 8.0kg of inorganic aluminum hypophosphite, 0.5kg hexenylbisstearamide and 80kg of water, stir to make the inorganic aluminum hypophosphite evenly disperse, then add 0.4kg of melamine, and adjust the temperature of the reactor Raise it to 80°C to dissolve the melamine. After 20 minutes, slowly add about 1.6kg of pentaerythritol phosphate that has been successfully prepared into the reaction kettle. After the dropwise addition, raise the reaction temperature to 100°C and keep it at this temperature Stir continuously and react for 6 hours, and the viscous paste obtained is filtered, dried and pulverized to obtain a powdery microencapsulated inorganic al...

Embodiment 3

[0048] Add 8kg of inorganic magnesium hypophosphite, 0.5kg sodium tripolyphosphate and 80kg ethyl acetate in the reactor, stir to make the inorganic magnesium hypophosphite evenly disperse, then add 0.3kg cyanuric chloride and 0.2kg sodium carbonate, stir evenly, And the temperature of the reaction kettle was raised to 40°C to dissolve cyanuric chloride, and 1.7kg of tribromophenol was slowly added dropwise to the reaction kettle after 10 minutes, while sodium hydroxide solution was added dropwise to keep the pH value of the system at 6 In the range of -8, after the tribromophenol is added dropwise, the reaction temperature is raised to 70°C, kept stirring at this temperature, and reacted for 4 hours, and the viscous paste obtained is filtered, dried, and pulverized. A powdery microencapsulated inorganic magnesium hypophosphite flame retardant product was obtained.

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Abstract

The invention relates to a microencapsulated inorganic hypophosphite flame retardant and a preparation method thereof. A capsule wall material of the microencapsulated inorganic hypophosphite flame retardant is a triazine ring containing crosslinked polymer. In order to solve the problem in the prior art that inorganic hypophosphite flame retardants are liable to combust spontaneously, the microencapsulated inorganic hypophosphite flame retardant is obtained by wrapping the surface of inorganic hypophosphite with the triazine ring containing crosslinked polymer as the capsule wall material through the microencapsulation technology. The microencapsulated inorganic hypophosphite flame retardant has the advantages of higher thermal stability, difficulty in spontaneous combustion, higher flame retardance efficiency, better compatibility with polymer matrices and the like. Besides, the preparation method is simple in process, is easy to operate and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of flame retardant preparation, and in particular relates to a microencapsulated inorganic hypophosphite flame retardant and a preparation method thereof, wherein the capsule material is a triazine ring-containing cross-linked polymer. Background technique [0002] Inorganic hypophosphite, as a new type of flame retardant with high phosphorus content, is widely used in engineering plastics and polyamide materials due to its excellent flame retardant efficiency. Inorganic hypophosphite is not volatile under the usual conditions for preparing and processing thermoplastic polymers, nor will it cause polymer decomposition, and has good mechanical properties and weather resistance during processing. The main disadvantage of inorganic hypophosphite is its poor thermal stability, especially in the processing of engineering plastics, the temperature is high and the friction of materials makes it easier to spontaneou...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/32B01J13/02
Inventor 葛骅朱长江肖锡福
Owner 苏州安鸿泰新材料有限公司
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