Catalysis carbon-forming type flame-retardant composite material and preparation method thereof

A flame-retardant composite material and charcoal-forming technology, which is applied in the field of catalytic charcoal-forming flame-retardant composite materials and its preparation, can solve the problems of fast flame propagation speed, large release rate, environmental hazards, etc., and achieve reduction of combustible gas content, reduction of Good effect on burning speed and product performance

Inactive Publication Date: 2009-09-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most polymers are flammable and combustible materials, which have a large release rate, high calorific value, fast flame propagation speed, and are not easy to extinguish when they burn. security poses a huge threat

Method used

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  • Catalysis carbon-forming type flame-retardant composite material and preparation method thereof
  • Catalysis carbon-forming type flame-retardant composite material and preparation method thereof
  • Catalysis carbon-forming type flame-retardant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A: Hydrotalcite is prepared by nucleation crystallization / isolation method, the specific method is to weigh 174.48gNi(NO 3 ) 2 ·6H 2 O and 112.54g Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to form a 750mL mixed salt solution, and 64.8g NaOH and 95.39g NaOH were weighed 2 CO 3 Dissolve in deionized water to make 750mL mixed alkali solution, add the two mixed solutions into the total back-mixed liquid membrane reactor at the same time, adjust the slit width between the rotor and stator of the reactor to be 2mm, the working voltage is 140V, and the rotor speed is 5000rpm , transfer the obtained mixed slurry to a three-necked flask, heat and stir, under nitrogen protection, reflux crystallization at 70°C for 6 hours, then fully wash with deionized water until the pH value is 7, and dry at 70°C for 12 hours to obtain Ni 2 Al-CO 3 - LDHs;

[0024] B: Weigh 60g of the hydrotalcite obtained in step A, then weigh 100g of polypropylene, and melt and blend it on ...

Embodiment 2

[0031] A: Weigh 174.48g Ni(NO 3 ) 2 ·6H 2 O and 75.96g Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to make 750mL mixed salt solution; then weighed 51.36g NaOH and 63.59g NaOH 2 CO 3Dissolve in deionized water to make 750mL mixed alkali solution; add the above two mixed solutions into the total back-mixed liquid film reactor at the same time, adjust the slit width between the reactor rotor and the stator to be 2mm, the working voltage is 140V, and the rotor speed is 5000rpm, add the obtained mixed slurry into a three-necked flask, heat and stir, under nitrogen protection, keep the temperature of the mixed slurry in the bottle at 70°C for reflux crystallization for 6 hours, and obtain Ni 3 Al-CO 3 - LDHs;

[0032] B: Same as example 1;

[0033] C: Same as example 1.

Embodiment 3

[0035] A: Weigh 43.62g Ni(NO 3 ) 2 ·6H 2 O, 115.38g Mg(NO 3 ) 2 ·6H 2 O and 112.53gAl(NO 3 ) 3 9H 2 O was dissolved in deionized water to make 750mL mixed salt solution; then weighed 57.60g NaOH and 95.39g NaOH 2 CO 3 Dissolve in deionized water to make 750mL mixed alkali solution; add the above two mixed solutions into the total back-mixed liquid film reactor at the same time, adjust the slit width between the reactor rotor and the stator to be 2mm, the working voltage is 140V, and the rotor speed is 5000rpm, add the obtained mixed slurry into a three-necked flask, heat and stir, under nitrogen protection, keep the temperature of the mixed slurry in the bottle at 70°C for reflux crystallization for 6 hours, and obtain nickel-magnesium-aluminum hydrotalcite;

[0036] B: Same as example 1;

[0037] C: Same as Example 1.

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Abstract

The invention discloses a catalysis carbon-forming type flame-retardant composite material and a preparation method thereof, belonging to the technical field of preparation of flame-retardant composite materials. The technical proposal is as follows: firstly hydrotalcite with the particle size of nano level or submicron level is prepared, and the hydrotalcite and the polymer are processed by melt blending reaction so as to prepare the catalysis carbon-forming type halogen free flame-retardant composite material. The composite material employs the property that the hydrotalcite can promote the polymer to be transformed to graphite-structure carbon, thus reducing the content of combustible gas released by polymer pyrolysis in the combustion process, reducing the combustion speed of the materials and leads the materials to have self-protecting function. The hydrotalcite absorbs large amount of heat when being heated for decomposition, and water and carbon dioxide gas released by decomposition can dilute and block the combustible gas; the products after decomposition is alkali porous material, has large specific surface, and can absorb harmful gases, especially acid gases, thus having double functions of retarding flame and suppressing smoke. The method has simple technique and good product performance and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant composite material preparation, and in particular relates to a catalyzed charcoal-forming flame-retardant composite material and a preparation method thereof. Background technique [0002] In recent decades, plastics, rubber, synthetic fibers and other polymer materials and their products have developed vigorously, and they are rapidly replacing traditional steel, metal, cement, wood, cotton and other natural polymers, and are widely used in industry, agriculture, military various sectors of the national economy. In 2000, the production volume of plastic alone reached 170 million tons, and its volume greatly exceeded the volume of steel produced in the same year. However, most polymers are flammable and combustible materials, which have a large release rate, high calorific value, fast flame propagation speed, and are not easy to extinguish when they burn. Security poses a huge threat. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/22C08L23/06C08L23/12C08L23/22C08L27/06C08L23/08C08L55/02
CPCC09K21/02C01B31/04
Inventor 张法智张利霞雷晓东郑秀婷李如事徐赛龙段雪
Owner BEIJING UNIV OF CHEM TECH
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