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Preparation method of resin-wrapped aluminum hydroxide

A technology of aluminum hydroxide and resin coating, applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problem of poor compatibility, small change in particle size of aluminum hydroxide particles, affecting the mechanical properties and processing of polymer materials. performance and other issues, to achieve good compatibility, no reduction in flame retardant effect, good dispersion and compatibility

Inactive Publication Date: 2015-04-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the poor compatibility with non-polar polymer materials and the tendency to agglomerate when aluminum hydroxide is used as a polymer flame retardant in the prior art, especially the agglomeration phenomenon between ultrafine aluminum hydroxide particles is obvious, Defects that affect the mechanical properties and processing properties of polymer materials, the purpose is to provide a simple preparation method for resin-coated aluminum hydroxide, the particle size of resin-coated aluminum hydroxide prepared by this method has little change, and it is compatible with polymer The matrix has good dispersion and compatibility, and can be widely used in polymer flame retardant

Method used

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  • Preparation method of resin-wrapped aluminum hydroxide
  • Preparation method of resin-wrapped aluminum hydroxide
  • Preparation method of resin-wrapped aluminum hydroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Add 55g of median diameter D to a 1000mL beaker 50 3.89 μm raw material aluminum hydroxide particles, 10.0 g ammonium persulfate and 500 mL deionized water, control the pH to 6.5, stir at 20°C for 24 hours, suction filter and dry to obtain aluminum hydroxide particles anchored by initiator ammonium persulfate ; Add 10.0g ammonium persulfate-anchored aluminum hydroxide particles, 0.2g polyvinylpyrrolidone, 0.8g sodium lauryl sulfate and 150mL deionized water into a 250mL three-necked flask, stir vigorously to disperse, heat to 80°C, slowly drop Add 8.0 g of styrene monomer, and drop it in about 1 hour; then continue to react for 8 hours, cool, wash, filter, and extract with tetrahydrofuran for 24 hours to obtain polystyrene resin-coated aluminum hydroxide.

Embodiment 2

[0029] Add 55g of median diameter D to a 1000mL beaker 50 Aluminum hydroxide particles of 5.12 μm in size, 20.0 g of ammonium persulfate and 500 mL of deionized water, controlled to pH 6.5, stirred at 25°C for 24 hours, suction filtered and dried to obtain aluminum hydroxide particles anchored by initiator ammonium persulfate ; Add 10.0g of ammonium persulfate-anchored aluminum hydroxide particles, 0.3g of polyvinylpyrrolidone, 1.0g of sodium lauryl sulfate and 150mL of deionized water into a 250mL three-neck flask, stir vigorously to disperse, heat to 80°C, and slowly drop Add 10.0g of methyl methacrylate monomer, and drop it in about 1 hour; then continue to react for 8 hours, cool, wash, filter, and extract with tetrahydrofuran for 24 hours to obtain polymethyl methacrylate resin-coated hydrogen alumina.

[0030] The characterization of the product that embodiment 1 and embodiment 2 make:

[0031] Observation of surface morphology: The morphology of raw aluminum hydroxide...

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Abstract

The invention discloses a preparation method of resin-wrapped aluminum hydroxide. The method comprises the following steps: dispersing aluminum hydroxide particles in an aqueous liquor of ammonium persulfate, controlling the pH value to 5-7, and stirring and absorbing; after absorption, filtering, and washing and drying the particles to obtain aluminum hydroxide particles anchored by ammonium persulfate; then, dispersing the aluminum hydroxide particles anchored by ammonium persulfate in water, heating while stirring, dropping an organic polymerizing monomer to the aqueous liquor for polymerization; after polymerization, washing, filtering and extracting the particles to obtain the aluminum hydroxide. The resin-wrapped aluminum hydroxide prepared by the method is small in change of grain size, has good dispersibility and compatibility with polymer base bodies, and can be widely applied to flame retardance of polymers.

Description

technical field [0001] The invention relates to a method for preparing resin-coated aluminum hydroxide, which belongs to the field of polymer material flame retardants. Background technique [0002] As a halogen-free flame retardant, aluminum hydroxide decomposes at high temperature to produce two products that can play a flame retardant role—alumina and water. At the same time, the water vapor generated by dehydration can dilute the pyrolysis of the polymer. The concentration of flammable gas and oxygen can slow down the combustion speed or prevent the continuation of combustion, so it has been widely used in the field of polymer flame retardancy. With the ultra-fineness of aluminum hydroxide, the surface electronic structure and crystal structure have changed, resulting in surface effects, small size effects, quantum effects and macroscopic tunnel effects that bulk materials do not have, so that it can be used in magnetism, optics, etc. Absorption, catalysis, chemical act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F120/14C08F2/44C08K9/10C08K3/22C09C1/40C09C3/10
Inventor 刘辉叶红齐崔欢庆王瑞萌邹鑫
Owner CENT SOUTH UNIV
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