Flame-retardant polypropylene composite materials with palygorskite as flame retardant

A technology of flame-retardant polypropylene and composite materials, which is applied in the field of flame-retardant polypropylene composite materials, can solve the problems of unfavorable popularization and application, high cost of addition, etc., and achieve the effects of low price, good material compatibility and stability, and small smoke

Inactive Publication Date: 2005-08-17
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Europe, America and Japan, inorganic flame retardant materials have accounted for 50% to 64% of all flame retardant products, mainly Al(OH) 3 and Mg(OH) 2 It is a material for additives, but these additions are expensive, which is not conducive to popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: After the natural palygorskite is selected and crushed to 100-5000 mesh (particle size is 0.26-2.um), then the palygorskite powder and magnesium hydroxide are mixed with a mixer in a ratio of 1:1 30 minutes to get the palygorskite composite flame retardant; then, the palygorskite composite flame retardant and polypropylene are fully mixed with a weight ratio of 45%, 55%, and injected on the injection molding machine with a conventional injection molding process Molded to obtain a flame-retardant polypropylene composite material. Determination of its performance indicators are as follows:

[0019] The oxygen index can reach 28; the combustion performance is UL94-1; the impact strength is 21;

[0020] The hardness is 94; the bending strength is 53.1.

Embodiment 2

[0021] Example 2: After the natural palygorskite is selected and crushed to 100-5000 mesh (particle size is 0.26-2.um), then the palygorskite powder and melamine are mixed with a mixer at a ratio of 1:2 for 30 minutes Palygorskite composite flame retardant; then, palygorskite composite flame retardant and polypropylene are fully mixed with a weight ratio of 40%, 60%, and injection molded on an injection molding machine with a conventional injection molding process, A flame retardant polypropylene composite was obtained. Determination of its performance indicators are as follows:

[0022] The oxygen index can reach 30; the combustion performance is UL94-0; the impact strength is 15.4; the hardness is 97; the bending strength is 41.5.

Embodiment 3

[0023] Embodiment 3: the natural palygorskite is finely ground to 100~5000 orders (particle size is 0.26-2.um), then the mixture of palygorskite powder and magnesium hydroxide and melamine (magnesium hydroxide and melamine The ratio of 1:0.1) was mixed with a mixer in a ratio of 1:3 for 30 minutes to obtain palygorskite compound flame retardant; The weight ratio is fully mixed, and injection molding is performed on an injection molding machine by a conventional injection molding process to obtain a flame-retardant polypropylene composite material. Determination of its performance indicators are as follows:

[0024] The oxygen index can reach 31, the combustion performance is UL94-0, and the impact strength is 28

[0025] The hardness is 96 and the bending strength is 36.6

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Abstract

The present invention provides one kind of composite fireproof polypropylene material and the composite fireproof polypropylene material is prepared with composite attapulgite clay fire retardant and polypropylene, and through mixing at 80-300 deg.c. The attapulgite clay with microporous structure makes the composite fireproof polypropylene material possess the functions of high efficiency, low cost, low toxicity, less smoke, no environmental pollution, high heat stability, excellent machining performance, etc.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a flame-retardant polypropylene composite material, in particular to a flame-retardant polypropylene composite material prepared by using palygorskite as a flame retardant. Background technique [0002] Palygorskite clay is a silicate clay mineral mainly composed of palygorskite. Due to the harsh conditions for its formation, it is a rare environmental mineral material in the world. Palygorskite with mining value in the world is mainly distributed in a few countries such as China, the United States, Spain, Senegal, France, Australia, Mexico, and Russia. my country's palygorskite reserves account for more than 95% of the world's reserves. Among them, the recently discovered palygorskite reserves in Banqiao Township, Linze County, Gansu Province are about 1.1 billion tons, accounting for more than 85% of the world's prospective reserves. X-ray diffraction quantitative an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08L23/12
Inventor 雷自强罗居杰杨志旺白雁斌马恒昌
Owner NORTHWEST NORMAL UNIVERSITY
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