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Preparation method and application of nanometer organic-layered composite metal hydroxide

A layered composite and hydroxide technology, applied in the field of engineering plastics, can solve problems such as smoke increase, great influence on material mechanical properties, and fast burning speed, so as to improve flame retardant temperature, good peeling effect, and increase heat absorption Effect

Inactive Publication Date: 2012-06-13
SHANDONG WAVE SHAIMULIAO GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its oxygen index is only about 17.4%, its char formation rate is low, it is easy to burn when it meets water, it has a high calorific value and a fast burning speed, and produces a large number of molten droplets accompanied by smoke, which is prone to fire, which limits its application field. Therefore, the development of safe, efficient and environmentally friendly PP flame retardants is one of the hotspots of current research.
The flame retardants currently used in polypropylene (PP) mainly include halogen-containing flame retardants, antimony trioxide (Sb 2 o 3 ) magnesium hydroxide (Mg(OH) 2 ), aluminum hydroxide (Al(OH) 3 ), melamine, ammonium polyphosphate (APP), etc., among which halogenated flame retardants and Sb 2 o 3 The compound can make PP obtain a good flame retardant effect, but the halogen-containing flame retardant releases a large amount of smoke and hydrogen halide gas when burning, which will cause so-called "secondary disasters" such as casualties and corrosion of equipment.
Sb 2 o 3 There are also disadvantages of increasing smoke, toxicity, dust, and high price. The commonly used Mg(OH) 2 , Al(OH) 3 Inorganic flame retardants such as inorganic flame retardants are added in a large amount (accounting for 60% of the matrix), which has a great impact on the mechanical properties of the material. Therefore, the development of environmentally friendly flame retardants that are halogen-free, smoke-suppressing, and toxic-free is the focus of flame retardant development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of nanometer organic-layer composite metal hydroxide as synergist

[0021] Take 14.4g (0.05mol) of sodium lauryl sulfate and dissolve it in 150ml of water, and heat it to 70°C (referred to as solution 1). Get 3.05g (0.015mol) of solid MgCl 2 ·6H 2 O and 1.2g (0.005mol) AlCl 3 ·6H 2 O was dissolved in 45ml of water (referred to as solution 2). Take 2.1g (0.05mol) of NaOH and 1.06g (0.01mol) of NaCO 3 Dissolved in 54ml of water (referred to as solution 3). Add solution 2 and solution 3 dropwise to solution 3 at the same time, adjust the speed of both to complete the dropwise addition, and then adjust the pH to 10 with 2M NaOH solution to obtain colloidal precipitation. The colloidal precipitate was aged at 70°C for 24 hours, suction filtered, washed with water until the pH value was less than 8, and dried at 80°C for 24 hours to obtain a layered composite metal hydroxide.

[0022] The layered composite metal hydroxide prepared and ...

Embodiment 2

[0023] Embodiment 2: the preparation of nanometer organic-layer composite metal hydroxide as synergist

[0024] Dissolve 25g (0.075mol) of sodium stearate in 150ml of water and heat to 80°C (referred to as solution 1). Get 1.02g (0.005mol) of solid MgCl 2 ·6H 2 O, 1.37gZnCl 2 (0.01mol) and 1.34g (0.005mol) CrCl 3 ·6H 2 O was dissolved in 45ml of water (referred to as solution 2). Take 2.1g (0.05mol) of NaOH and 1.06g (0.01mol) of NaCO 3 Dissolved in 54ml of water (referred to as solution 3). Add solution 2 and solution 3 dropwise to solution 3 at the same time, adjust the speed of both to complete the dropwise addition, and then adjust the pH to 10 with 2M NaOH solution to obtain colloidal precipitation. The colloidal precipitate was aged at 80°C for 24 hours, suction filtered, washed with water until the pH value was less than 8, and dried at 80°C for 24 hours to obtain a layered composite metal hydroxide.

[0025] The layered composite metal hydroxide prepared and ma...

Embodiment 3-7

[0026] Embodiment 3-7: the weight ratio content of each component in polypropylene plastic (see table below for details)

[0027] Example PP organic flame retardant synergist antioxidant Lubricant Dispersant Oxygen Index (LOI%) Flame retardant 3 75 25 0 0.2 0.5 23.7 V-0 4 73 25 2 0.2 0.5 26.1 V-0 5 71 25 4 0.2 0.5 27.4 V-0 6 69 25 6 0.2 0.5 26.2 V-0 7 67 25 8 0.2 0.5 25.3 V-0

[0028] In the above table, the polypropylene is homopolypropylene imported from South Korea, the synergist is the nano-organic-layered composite metal hydroxide prepared in Example 1, and the organic flame retardant is ammonium polyphosphate (APP): pentaerythritol ( PER): a mixture of melamine (MEL) = 4:2:1 (weight ratio), 2,6-di-tert-butyl-4-methylphenol as the antioxidant, calcium stearate as the lubricating and dispersing agent, and synergistic The flame retardant composition is mixed with organic flame retardant, antio...

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PUM

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Abstract

The invention discloses a preparation method and application of nanometer organic-layered composite metal hydroxide. The nanometer organic-inorganic composite layered metal hydroxide is the layered composite metal hydroxide of polymer intercalation compatible with polypropylene and can serve as a synergist to be applied to inflaming retarding combination. The inflaming retarding combination is formed by mixing and compounding the synergist, an organic fire retardant, antioxygen and a lubrication dispersing agent and is especially applicable to flame retarding and enhancing of polypropylene. Compared with the prior art, the prepared nanometer organic-layered composite metal hydroxide has good inflaming retarding, enhancing and toughening effects on a system and can enhance effect with an inflaming retarding composite composed of the nanometer organic-layered composite metal hydroxide mutually, thereby achieving purposes of increasing inflaming retarding temperature and heat absorption capacity and reducing use quantity of the fire retardant.

Description

technical field [0001] The invention relates to the preparation of a nano-organic-layered composite metal hydroxide and its application in a flame-retardant composition, belonging to the technical field of engineering plastics. Background technique [0002] Layered composite metal hydroxide, also known as hydrotalcite-like, because its layered composite hydroxide contains a variety of metal hydroxides, such as magnesium aluminum layered metal hydroxide, it has both the properties of magnesium hydroxide and aluminum hydroxide. Advantages, absorb heat and release water, CO when decomposed 2 and other non-combustible materials, and can promote the carbonization of combustible materials, so it can replace magnesium hydroxide and aluminum hydroxide as a flame retardant for polypropylene. However, the layered composite metal hydroxide is a highly water-containing precipitate. During the preparation, due to the dehydration of the hydroxyl group, the original hydrogen bond connecti...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/22C08L51/06C08L23/12
Inventor 王培利艾仕云欧阳秋英段涛
Owner SHANDONG WAVE SHAIMULIAO GRP