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Flame-retarding antistatic polyformaldehyde composite material and preparation method thereof

A flame retardant, antistatic, composite material technology, applied in the field of plastic modification, can solve the problems of decreased impact resistance, large amount of flame retardant and antistatic agent, poor compatibility, etc., and achieves low percolation threshold, The effect of reducing the amount of addition and facilitating the conductive network

Inactive Publication Date: 2018-05-25
KAILUAN ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing flame retardant and antistatic polyoxymethylene modification technology uses a large amount of flame retardants and antistatic agents, and the compatibility between inorganic powder and polyoxymethylene is extremely poor. The addition of a large amount of powder additives makes polyoxymethylene The mechanical properties of the material deteriorate seriously, especially the defects caused by the agglomeration of powder additives, which significantly reduce the impact resistance of the material and make the material embrittled. While obtaining flame retardant and antistatic properties, it also loses its use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The components calculated in parts by weight include: 76.5 parts of polyoxymethylene, 8 parts of ammonium polyphosphate, 4 parts of pentaerythritol diphosphate melamine salt, 2 parts of carbon nanotubes, 2 parts of carbon fiber, triethylene glycol bis[β-( 3-tert-butyl-4-hydroxy-5-methylphenyl) propionate] 0.5 parts, melamine 3 parts, polyester thermoplastic polyurethane elastomer 4 parts.

[0022] The preparation process steps are as follows:

[0023] (1) Put the polyester-type thermoplastic polyurethane elastomer into the mixer, and after melting, add ammonium polyphosphate and pentaerythritol diphosphate melamine salt into the mixer, and wait until the thermoplastic polyurethane elastomer and flame retardant are fully mixed. Remove after mixing to form a flame retardant coating. Process parameters: the temperature of the front roll of the mixer is 168 °C, the temperature of the rear roll is 175 °C, the speed of the roll is 20 rpm, and the mixing time is 30 min.

[0...

Embodiment 2

[0027] The components calculated in parts by weight include: 68.5 parts of polyoxymethylene, 8 parts of melamine condensed polyphosphate, 6 parts of pentaerythritol diphosphate melamine salt, 4 parts of carbon nanotubes, 1 part of conductive carbon black, 3 parts of carbon fiber, three [2, 0.5 parts of 4-di-tert-butylphenyl]phosphite, 1 part of melamine, and 8 parts of polyether-type thermoplastic polyurethane elastomer.

[0028] The preparation process steps are as follows:

[0029] (1) Put the polyether-type thermoplastic polyurethane elastomer into the mixer, and after melting, add melamine polycondensed phosphate ester and pentaerythritol diphosphate melamine salt into the mixer, and wait for the thermoplastic polyurethane elastomer and flame retardant Mix well and remove to form a flame retardant coating. Process parameters: the temperature of the front roll of the mixer is 170 °C, the temperature of the back roll is 180 °C, the speed of the roll is 25 rpm, and the mixin...

Embodiment 3

[0033] The components calculated in parts by weight include: 65.9 parts of polyoxymethylene, 6 parts of melamine borate, 10 parts of melamine pyrophosphate, 4 parts of pentaerythritol diphosphate melamine salt, 3 parts of graphene, 2 parts of carbon fiber, four [β -0.1 part of (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 1 part of melamine, and 8 parts of polyester thermoplastic polyurethane elastomer.

[0034] The preparation process steps are as follows:

[0035] (1) Put the polyester-type thermoplastic polyurethane elastomer into the mixer, and after melting, add melamine borate, melamine pyrophosphate, and pentaerythritol diphosphate melamine into the mixer, and wait for the thermoplastic polyurethane The elastomer and the flame retardant are fully mixed and taken out to form a flame retardant coating. Process parameters: the temperature of the front roll of the mixer is 175 °C, the temperature of the rear roll is 185 °C, the speed of the roll is 3...

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PUM

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Abstract

The invention discloses a flame-retarding antistatic polyformaldehyde composite material and a preparation method thereof. The flame-retarding antistatic polyformaldehyde composite material is prepared from the following components: 65 to 79.9 parts of polyformaldehyde, 12 to 20 parts of a nitrogen and phosphorus flame retardant, 3 to 8 parts of an antistatic agent, 0.1 to 0.5 part of an antioxidant, 1 to 3 parts of melamine and 4 to 8 parts of a compatibilizer. According to the flame-retarding antistatic polyformaldehyde composite material, a thermoplastic polyurethane elastomer is used as the compatibilizer and is used for cladding the flame retardant and the antistatic agent respectively to prepare a cladding material; then the cladding material, the polyformaldehyde and other auxiliaryagents are commixed through a double-screw extruder to prepare the flame-retarding antistatic polyformaldehyde composite material. According to the flame-retarding antistatic polyformaldehyde composite material, the nitrogen and phosphorus flame retardant with high carbon content is selected to be compounded with other flame retardants and the flame retarding effect is strengthened through char formation; a carbon material with high electric conductivity is compounded with carbon fibers to use and the dosage of the antistatic agent is reduced under the same electrical resistivity; the thermoplastic polyurethane elastomer is used as the compatibilizer between the antistatic flame-retarding auxiliary agent and the polyformaldehyde, so that the phase interface cohesiveness is effectively improved, and the prepared flame-retarding antistatic polyformaldehyde composite material keeps excellent mechanical strength.

Description

technical field [0001] The invention relates to a flame-retardant and antistatic polyoxymethylene composite material and a preparation method thereof, belonging to the technical field of plastic modification. Background technique [0002] As a high crystalline engineering plastic, polyoxymethylene has excellent mechanical properties, wear resistance, dimensional stability, chemical corrosion resistance, fatigue resistance, self-lubricating properties, etc., so that it can replace metals in many fields. For example, it is widely used in automobile, machinery manufacturing, electronic appliances, chemical industry, building materials and other fields. However, the limiting oxygen index of polyoxymethylene is only 15%. It is an extremely flammable material, and its high resistivity is easy to generate static electricity. Applications, such as plastic rollers, equipment parts, etc. Flame retardant and antistatic modification of polyoxymethylene is the main means to make up for...

Claims

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Application Information

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IPC IPC(8): C08L59/00C08L75/06C08L75/08C08K13/06C08K9/10C08K7/24C08K7/06C08K5/3492C08K3/04C08K3/32C08K5/134C08K5/526
CPCC08K2003/323C08K2201/001C08L59/00C08L2201/02C08L2207/04C08L75/06C08L75/08C08K13/06C08K9/10C08K7/24C08K7/06C08K5/34922C08K3/04C08K5/34928C08K3/32C08K5/1345C08K5/526
Inventor 马小丰刘莉莉金旺杨大志关礼争吕运开李建华王亚涛
Owner KAILUAN ENERGY CHEM
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