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Palygorskite compound flame retardant

A compound flame retardant and palygorskite technology, applied in the field of flame retardants and additives, can solve the problems of high adding price, unfavorable promotion and application, etc., and achieve the effects of low cost, low price and lasting effect

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

[0014] 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 mechanically blended in a ratio of 1:1 The method is fully mixed to obtain palygorskite composite flame retardant. The palygorskite composite flame retardant obtained above is fully mixed with polypropylene at a weight ratio of 45% and 55%, and injection-molded 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:

[0015] The oxygen index can reach 28; the combustion performance is UL94-1

Embodiment 2

[0016] Example 2: The natural palygorskite is finely ground and crushed to 100-5000 mesh (particle size is 0.26-2.um), and then the palygorskite powder and melamine are mechanically mixed in a ratio of 1:2 Mix well to get the palygorskite composite flame retardant. The palygorskite composite flame retardant obtained above is fully mixed with polypropylene at a weight ratio of 40% and 60%, and injection-molded 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:

[0017] The oxygen index can reach 30; the combustion performance is UL94-0

Embodiment 3

[0018] 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) is fully mixed with the ratio of 1:3 by mechanical mixing to obtain the palygorskite composite flame retardant. The palygorskite composite flame retardant obtained above is fully mixed with polypropylene at a weight ratio of 30% and 70%, and injection-molded 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:

[0019] The oxygen index can reach 31, and the combustion performance is UL94-0

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Abstract

The composite paligorskite flame retardant is prepared through mixing paligorskite powder of 100-5000 mesh and re-compounding agent in certain ratio. Paligorskite in microporous structure has powerful gas adsorbing effect and excellent water absorbing and maintaining performance, can produce water vapor to isolate oxygen and isolate heat transfer, and thus has excellent flame retarding effect. Compared with available flame retardants, the composite paligorskite flame retardant as one kind of green flame retardant has no volatilization, lasting effect, low cost, less smoke and no toxicity.

Description

technical field [0001] The invention relates to an additive, in particular to a flame retardant, in particular to a palygorskite composite 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 analysis and transmission electron microscope analysis show that the content of palygorskite is 25% to 51%, and its single cry...

Claims

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Application Information

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IPC IPC(8): C09K21/10
Inventor 雷自强罗居杰杨志旺白雁斌马恒昌
Owner NORTHWEST NORMAL UNIVERSITY
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