New fire retardant aluminium crystal whisker and its production process

A new type of aluminum-based technology, applied in fire-retardant coatings and other directions, can solve the problems of poor compatibility between inorganic flame-retardant whiskers and polymers, less types of released resistive gases, and small whisker length/diameter ratio. Anti-smoke effect, low toxicity and good compatibility

Inactive Publication Date: 2006-08-02
WUHAN CHEM COLLEGE
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Problems solved by technology

[0003] In order to solve the problems of poor compatibility between inorganic flame retardant whiskers and high polymers, few types and small amounts of released flame retardant gases, and small whisker length / diameter ratio, the present invention provides a new type of aluminum flame retardant whisker (AACHH) and its production method

Method used

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  • New fire retardant aluminium crystal whisker and its production process
  • New fire retardant aluminium crystal whisker and its production process

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Embodiment Construction

[0013] Add 1Kg Al 2 SO 4 18H 2 O and 0.254Kg urea (NH 2 ) 2 CO as raw material, add 1.1Kg water H 2 O and 0.038Kg template agent sorbitol, mix evenly, adjust the pH value to 6 with nitric acid, put the mixed solution in an autoclave, heat to 95°C-100°C, and react for 8 hours to obtain the crystal NH 4 Al(OH) 2 (CO 3 )·H 2 O, after washing with water and suction filtration, the filtrate is recycled, and the filter cake is dried at a temperature of 105°C to finally obtain 0.66Kg of novel aluminum-based flame-retardant whiskers (AACHH).

[0014] The infrared spectrum of the resulting novel aluminum-based flame-retardant whisker (AACHH) is as follows figure 2 shown.

[0015] In the figure, there are obviously three kinds of anionic groups, among which 3445cm -1 is the structural hydroxyl group (OH -1 ) symmetrical stretching vibration; 3018~3174cm -1 is the amine group (NH 4 + ), the symmetrical stretching vibration of ), 1386cm -1 is the amine group (NH 4 + ) as...

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Abstract

The present invention is new type fire retardant aluminum crystal whisker and its production process. The fire retardant aluminum crystal whisker has the chemical molecular expression of NH4Al(OH)2(CO3)íñH2O. It is prepared with Al2SO4íñ18H2O and urea as main material, and through mixing with sorbic alcohol and water, regulating pH to 6-8, and heating to 95-150 deg.c to react inside a high pressure reactor for 6-8 hr to obtain the crystal as the fire retardant aluminum crystal whisker. The fire retardant aluminum crystal whisker has no toxicity, less smoke produced in burning, low toxicity of the burning product, no immigration, no leaching out, no environmental pollution and low cost, as well as high compatibility with polymer, many kinds of fire retarding gases, fire retarding gas releasing amount up to 60.0-80.0 %, low fire retarding gas releasing temperature of 250-350 deg.c, whisker length/diameter ratio up to 20-40 and other features.

Description

technical field [0001] The invention relates to a novel aluminum-based flame-retardant whisker (AACHH) and a production method thereof. Background technique [0002] At present, the widely used halogen-containing polymer flame-retardant materials release a large amount of poisonous and harmful corrosive gases in case of fire, which brings great harm to people. Inorganic flame retardant whiskers have become the leading direction of flame retardant technology development because of their characteristics of non-toxicity, smoke elimination, low toxicity of combustion products, no migration, no leakage, no pollution to the environment, and low cost. There are two main types of known inorganic flame-retardant whiskers: one is aluminum-based inorganic flame-retardant whiskers represented by aluminum hydroxide whiskers; the other is magnesium-based inorganic flame-retardant whiskers represented by magnesium hydroxide whiskers. However, ① these two kinds of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/02
Inventor 黄志良刘羽梁邦兵
Owner WUHAN CHEM COLLEGE
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