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Preparation method of diatomite-modified flame-retardant polypropylene

A flame-retardant polypropylene and diatomite technology, applied in the field of materials, can solve problems such as poor compatibility, uneven mixing of composite materials, and reduce the stability and strength of finished composite materials, achieve good gas phase barrier, improve compatibility, The effect of improving surface strength

Inactive Publication Date: 2017-11-24
陈涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, more scientific workers have begun to explore the flame retardant mechanism of polymers from a microscopic point of view. The research has explored the changes from the macroscopic surface combustion phenomenon to the molecular level, which is of great significance to the research on the flame retardant mechanism of silicon-containing polymers. A major breakthrough has been made, but the compatibility between traditional methyl hydrogen silicone oil and polypropylene is poor, which makes the composite material mixed unevenly and reduces the stability and strength of the finished composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of diatomite modified flame retardant polypropylene, comprising the following steps:

[0019] (1) Get 0.4 parts by weight of 1,2-dimethylimidazole, add it to 14 times the weight of dehydrated alcohol, stir well, add 0.1 parts by weight of lithium naphthenate, 3 parts by weight of tetramethyl dimethicone Siloxane, heat preservation and stirring at 50°C for 20 minutes to obtain a silanol dispersion;

[0020] (2) Get 0.6 parts by weight of β-hydroxyalkylamide, add it to deionized water 10 times its weight, and stir evenly to obtain an amide solution;

[0021] (3) Get 13 parts by weight of diatomaceous earth, 1 part by weight of dithiosalicylic acid, and 2 parts by weight of ammonium bicarbonate and mix them, send them into a muffle furnace, heat at 120°C for 20 minutes, and lower the temperature at 60°C, add it to the above amide solution, and keep stirring for 4 minutes to obtain a diatomite dispersion;

[0022] (4) Get 0.7 weight part of fatty acid...

Embodiment 2

[0026] (1) Get 1,2-dimethylimidazole of 1 weight part, join in the dehydrated alcohol of its weight 14 times, stir evenly, add the lithium naphthenate of 0.2 weight part, the tetramethyl dimethicone of 4 weight parts Siloxane, heat preservation and stirring at 60°C for 30 minutes to obtain a silanol dispersion;

[0027] (2) Get 1 part by weight of β-hydroxyalkylamide, add it to deionized water 10 times its weight, and stir evenly to obtain an amide solution;

[0028] (3) Get 20 parts by weight of diatomaceous earth, 2 parts by weight of dithiosalicylic acid, and 3 parts by weight of ammonium bicarbonate and mix them, send them into a muffle furnace, heat at 120°C for 30 minutes, and lower the temperature at 60°C, add it to the above amide solution, and keep stirring for 10 minutes to obtain a diatomite dispersion;

[0029] (4) Get 1 weight part of fatty acid polyethylene glycol ester, join in the dimethylformamide of its weight 7 times, stir well, add the ammonium polyphospha...

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Abstract

The invention discloses a preparation method of diatomite-modified flame-retardant polypropylene. Through the addition of diatomite and the like, the surface strength, the hardness and other mechanical properties of the finished diatomite-modified flame-retardant polypropylene can be effectively improved; through blending with ammonium polyphosphate, the area of a burning carbon layer is effectively increased, so that a very good gas barrier effect is achieved and the flame-retardant and fire-proof performance of the finished diatomite-modified flame-retardant polypropylene is improved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of diatomite-modified flame-retardant polypropylene. Background technique [0002] Silane flame retardants mainly include inorganic silicon and organic silicon. Among them, inorganic silicon materials include silica, glass, etc., and these flame retardants are commonly used in the field of fillers. With the development of research and development, more and more inorganic alkane flame retardant systems have been developed. At present, the known ones are: silica, glass fiber, microporous glass and other low melting point glasses, tin chloride, hydrated silicon compounds, Silicate polyphosphate, siloxane boron, etc. The main defect of inorganic silicon-based flame retardants is that they have poor compatibility with the substrate, which leads to many problems in application. In terms of compatibility, micro-particles of micron or nano-scale can usually be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L71/02C08K13/06C08K9/06C08K3/34C08K5/098C08K3/32C08K5/20
CPCC08L23/12C08K2003/323C08L2201/02C08L71/02C08K13/06C08K9/06C08K3/346C08K5/098C08K3/32C08K5/20
Inventor 陈涛
Owner 陈涛
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