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Vermiculite-based composite flame retardant and preparation method thereof

A technology of compound flame retardant and phosphorus-based flame retardant, applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., can solve the problems of low flame retardant effect, cumbersome preparation process and loss, etc. Improve synergistic flame retardant effect, improve flame retardant effect, good effect of flame retardant effect

Active Publication Date: 2014-10-01
XINJIANG AOJILI ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention patent "Preparation method of efficient and environmentally friendly composite flame retardant (CN102010585B)" uses nano-attapulgite, inorganic flame retardants, and phosphate flame retardants as raw materials, and undergoes surface modification and compounding of attapulgite. The environmentally friendly composite flame retardant is prepared, and its flame retardant effect is not very high. After adding this flame retardant, the limiting oxygen index of polyurethane foam can only reach 28.7, and the preparation process is relatively cumbersome
However, since the expanded vermiculite has been treated at a high temperature of about 900°C, it basically loses all interlayer water and structural water, and no longer has the expansion effect, so the flame retardant effect of vermiculite cannot be fully exerted.

Method used

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Embodiment 1

[0029] The technical solution adopted in the present invention is a vermiculite-based composite flame retardant, which consists of the following components by mass: 20 parts of modified vermiculite, 45 parts of magnesium hydroxide, 25 parts of phosphorus-based flame retardant, 5 parts of silane coupling agent.

[0030] The preparation method of the composite flame retardant based on vermiculite, the preparation method comprises the following steps:

[0031] (1) Modification of vermiculite:

[0032] Firstly, select raw ore vermiculite with a particle size of 0.7mm-2mm, crush it with a ball mill, and sieve it to 100-300 mesh to obtain vermiculite powder;

[0033] Add 30g of vermiculite powder to H + The concentration is 6mol / L in 1000ml acidic solution, heat up to 100 o C, processed under rapid stirring for 3 hours to obtain a solid-liquid mixture;

[0034] The resulting solid-liquid mixture is filtered to obtain vermiculite solids, and the vermiculite solids are repeatedly ...

Embodiment 2

[0039]The technical solution adopted in the present invention is a compound flame retardant based on vermiculite, which consists of the following components by mass: 35 parts of modified vermiculite, 30 parts of magnesium hydroxide, 15 parts of phosphorus-based flame retardant, 2 parts of silane coupling agent.

[0040] The preparation method of the composite flame retardant based on vermiculite, the preparation method comprises the following steps:

[0041] (1) Modification of vermiculite:

[0042] Firstly, select raw ore vermiculite with a particle size of 0.7mm-2mm, crush it with a ball mill, and sieve it to 100-300 mesh to obtain vermiculite powder;

[0043] Add 50g of vermiculite powder to H + In the 3500ml acid solution whose concentration is 4mol / L, the temperature is raised to 80 o C, processed under rapid stirring for 3 hours to obtain a solid-liquid mixture;

[0044] The resulting solid-liquid mixture is filtered to obtain vermiculite solids, and the vermiculite ...

Embodiment 3

[0049] The technical solution adopted in the present invention is a compound flame retardant based on vermiculite, which consists of the following components by mass: 30 parts of modified vermiculite, 40 parts of magnesium hydroxide, 20 parts of phosphorus-based flame retardant, 3 parts of silane coupling agent.

[0050] The preparation method of the composite flame retardant based on vermiculite, the preparation method comprises the following steps:

[0051] (1) Modification of vermiculite:

[0052] Firstly, select raw ore vermiculite with a particle size of 0.7mm-2mm, crush it with a ball mill, and sieve it to 100-300 mesh to obtain vermiculite powder;

[0053] Add 40g of vermiculite powder to H + In 5500ml acidic solution with a concentration of 1mol / L, the temperature is raised to 50-100 o C, processed under rapid stirring for 3 hours to obtain a solid-liquid mixture;

[0054] The resulting solid-liquid mixture is filtered to obtain vermiculite solids, and the vermicul...

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Abstract

The invention discloses a vermiculite-based composite flame retardant and a preparation method thereof. The composite flame retardant is composed of the following components in parts by mass: 20-35 parts of modified vermiculite, 30-45 parts of magnesium hydroxide, 15-25 parts of a phosphorus based flame retardant and 2-5 parts of a silane coupling agent. The preparation method of the vermiculite-based composite flame retardant comprises the steps of carrying out modified treatment on vermiculite, preparing a composite flame retardant and compounding the composite flame retardant. The composite flame retardant prepared by using the method contains no halogen components and has environment-friendly and low-smoke effects; the composite flame retardant is prepared from different flame-retardant components; the flame-retardant and smoke-inhibiting effects of the flame retardant are simultaneously improved by utilizing the synergistic effect of the flame-retardant components.

Description

technical field [0001] The invention relates to a composite flame retardant and a preparation method thereof, in particular to a vermiculite-based composite flame retardant and a preparation method thereof. Background technique [0002] With the rapid development of social economy, people pay more and more attention to environmental protection and fire safety, and fireproof materials have been greatly developed. High-efficiency flame retardants have played a great role in reducing fire hazards, but at the same time, traditional halogen-based flame-retardant products produce a large amount of smoke and toxic corrosive gases during combustion, hindering rescue and evacuation, resulting in secondary Disasters happen. Therefore, the application of halogen flame retardant products is limited. Halogen-free and environmentally friendly flame retardants are widely used due to their environmentally friendly characteristics such as low smoke and low toxicity. The use of high-effici...

Claims

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Application Information

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IPC IPC(8): C08K9/00C08K9/02C08K3/34C08K3/22C08K3/32C08K5/5333C08K5/523C08K5/521C09C1/42C09C3/04C09C3/06
Inventor 宋怡孟凡斌陶海军阙勇军
Owner XINJIANG AOJILI ENERGY SAVING TECH
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