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Preparation method of capsule-coated magnesium hydroxide fire retardant

A magnesium hydroxide and capsule coating technology, applied in the chemical industry, can solve the problems affecting the processing and forming properties of polymer-based filling materials, the mechanical properties and other properties of the filling materials are decreased, and the compatibility of flame retardants is poor. Strong force, large interface bonding force, good compatibility effect

Active Publication Date: 2012-12-26
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame retardants produced by the above methods have poor compatibility with polymers, and the interfacial bonding force is small, making it difficult to disperse in polymer matrix materials, which affects the processing and molding properties of polymer-based filling materials and leads to the mechanical properties of filled materials. and other performance degradation

Method used

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  • Preparation method of capsule-coated magnesium hydroxide fire retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1, 160g of magnesium hydroxide micropowder with a particle size of 0.08-1μm was added to 600mL of water, and stirred for 20min at a temperature of 40°C and a stirring speed of 600rpm to form a uniformly dispersed suspension of water phase components ;

[0025] Mix free radical polymerization monomer, crosslinking agent and initiator, free radical polymerization monomer is methyl acrylate 89g, n-butyl methacrylate 36g, styrene 45g, crosslinking agent is glycerol trimethacrylate 18g, the initiator is azobisisobutyronitrile 2g, under the condition that the temperature is 40°C and the stirring speed is 600rpm, stir evenly to make the oil phase component;

[0026] Add 190g of the oil phase component into the suspension of the water phase component, and stir to form a homogeneous mixture at a temperature of 40°C and a stirring speed of 8000rpm;

[0027] The temperature of the mixture was raised to 61°C, and the reaction was stirred for 3 hours to complete;

[0028] ...

Embodiment 2

[0029] Example 2, 300g of magnesium hydroxide micropowder with a particle size of 0.08-1μm was added to 1000mL of water, and stirred for 20min at a temperature of 50°C and a stirring speed of 500rpm to form a uniformly dispersed aqueous component suspension ;

[0030] Mix the free radical polymerization monomer, crosslinking agent and initiator, the free radical polymerization monomer is 265g of styrene, the crosslinking agent is 30g of divinylbenzene, the initiator is 5g of azobisisoheptanonitrile, at a temperature of 50°C 1. Under the condition that the stirring speed is 500rpm, stir evenly to make the oil phase component;

[0031] Add 300g of the oil phase component into the suspension of the water phase component, and stir to form a homogeneous mixture at a temperature of 40°C and a stirring speed of 9000rpm;

[0032] The temperature of the mixed solution was raised to 85°C, and the reaction was stirred for 4 hours to complete;

[0033] Stop stirring, cool down to room t...

Embodiment 3

[0034] Example 3, 400g of magnesium hydroxide micropowder with a particle size of 0.08-1μm was added to 600mL of water, and stirred for 30min at a temperature of 60°C and a stirring speed of 800rpm to form a uniformly dispersed aqueous component suspension ;

[0035] Mix free radical polymerization monomer, crosslinking agent and initiator, free radical polymerization monomer is methyl methacrylate 371g, crosslinking agent is ethylene glycol dimethacrylate 50g, initiator is benzoyl peroxide 8g, under the condition that the temperature is 60°C and the stirring speed is 800rpm, stir evenly to make the oil phase component;

[0036] Add 429g of the oil phase component into the suspension of the water phase component, and stir to form a homogeneous mixture at a temperature of 60°C and a stirring speed of 10,000rpm;

[0037] The temperature of the mixture was raised to 90°C, and the reaction was stirred for 5 hours to complete;

[0038] Stop stirring, cool down to room temperature...

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Abstract

The invention relates to a preparation method of capsule-coated magnesium hydroxide fire retardant, comprising the following steps: adding magnesium hydroxide micropowder into water to prepare aqueous phase component suspension; mixing a free radical polymerization monomer, a cross-linking agent and an initiator, and evenly stirring to prepare into an oil phase component; adding the prepared oil phase component into the aqueous phase component suspension, and evenly stirring to obtain mixed liquor; heating the mixed liquor, stirring, and lowering the temperature to room temperature; filtering and separating the mixed liquor; separating out the magnesium hydroxide capsule; washing the magnesium hydroxide capsule to obtain a magnesium hydroxide capsule wet cake; and drying to obtain the capsule-coated magnesium hydroxide fire retardant, wherein the binding force of a coating layer and the magnesium hydroxide formed by the free radical polymerization monomer, the cross-linking agent and the initiator is strong. The capsule-coated magnesium hydroxide fire retardant has the advantages of good compatibility of the coating layer and a high polymer matrix material, large interface binding force, evenly dispersed magnesium hydroxide micropowder, cooperated inflaming retarding of the magnesium hydroxide and the capsule, and high inflaming retarding efficiency.

Description

technical field [0001] The invention relates to a preparation method of a surface-coated composite inorganic flame retardant, more precisely a preparation method of a capsule-coated magnesium hydroxide flame retardant, which belongs to the technical field of chemical industry. Background technique [0002] At present, the development of flame retardants in the world shows the trend of non-halogenated, compound, harmless or low-harm and low-smoke. Magnesium hydroxide inorganic flame retardant has good chemical stability, is not volatile, has low toxicity or is non-toxic, does not produce corrosive and other harmful gases, is environmentally friendly, and has rich sources of raw materials and low price, which is in line with the development of today's flame retardants towards environmental protection It has become the main direction of the development of flame retardant technology. However, the flame retardant efficiency of single magnesium hydroxide is low, and generally a h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/10C08K9/10C08K3/22
Inventor 逄奉建张志鸿曹其贵王乐军刘建华于万永姜明亮王东
Owner 潍坊欣龙生物材料有限公司
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