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A special halogen-free flame retardant and synergistic functional masterbatch for polyoxymethylene modification and preparation method thereof

A functional masterbatch, flame retardant and synergistic technology, applied in the field of plastic modification processing, can solve the problems of poor thermal stability, weak interface adhesion, large loss of flame retardant performance, etc., to achieve enhanced compactness and structural stability, Improve thermal decomposition temperature and synergistic flame retardant effect

Active Publication Date: 2021-12-28
江苏勒诚技术研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the problems of strong hygroscopicity, poor thermal stability, weak interfacial adhesion, large loss of flame retardant performance, low fluidity, and dispersion of melamine polyphosphate in the application process of halogen-free flame-retardant polyoxymethylene modification. Poor performance and other application defects, as well as problems such as thermal degradation caused by powder friction during the twin-screw direct blending extrusion process, resulting in flame retardant performance and physical and mechanical decline, while overcoming the single-layer coating of traditional polymer or inorganic wall materials For the defect that melamine polyphosphate cannot provide sufficient protection, the present invention proposes a method of using a wall material with flame-retardant synergies and dense material to implement multiple composite coatings on melamine polyphosphate, and then combine it with the corresponding flame-retardant Synergist and additives are mixed at low temperature to prepare a halogen-free flame-retardant synergistic functional masterbatch for polyoxymethylene halogen-free flame-retardant modification

Method used

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  • A special halogen-free flame retardant and synergistic functional masterbatch for polyoxymethylene modification and preparation method thereof
  • A special halogen-free flame retardant and synergistic functional masterbatch for polyoxymethylene modification and preparation method thereof
  • A special halogen-free flame retardant and synergistic functional masterbatch for polyoxymethylene modification and preparation method thereof

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Effect test

Embodiment 1

[0034] A special halogen-free flame retardant synergistic functional masterbatch for polyoxymethylene modification, the quality ratio of raw materials is as follows:

[0035]

[0036] The preparation method of the multi-compound coated melamine polyphosphate used in the above-mentioned polyoxymethylene modified special-purpose halogen-free flame-retardant synergistic functional masterbatch is as follows:

[0037] Add 230L of absolute ethanol, 120kg of melamine polyphosphate, 7kg of aluminum sol, and 1kg of zinc oxide sol into the enamel reaction kettle with a stirring and temperature control device, stir evenly and add to 40°C, then add the mass percentage content dropwise at an even speed 10.0wt.% ammonia water, and the pH value of the reaction solution is controlled at 7.5 to 8.5 to promote the sol-gel reaction between the aluminum sol and the zinc oxide sol. After the addition is completed, continue to stir for 3.5 hours to end the reaction; Washing, filtering, and dryin...

Embodiment 2

[0040] A special halogen-free flame retardant synergistic functional masterbatch for polyoxymethylene modification, the quality ratio of raw materials is as follows:

[0041]

[0042] The preparation method of the multi-compound coated melamine polyphosphate used in the above-mentioned polyoxymethylene modified special-purpose halogen-free flame-retardant synergistic functional masterbatch is as follows:

[0043] Add 230L of absolute ethanol, 120kg of melamine polyphosphate, 8kg of aluminum sol, and 1.5kg of zinc oxide sol into the enamel reaction kettle with a stirring and temperature control device, stir evenly and add to 35°C, then add the mass percentage dropwise at an even speed Ammonia water with a content of 11.5wt.%, and the pH value of the reaction solution is controlled at 7.5 to 8.5 to promote the sol-gel reaction between the aluminum sol and the zinc oxide sol. After the addition is completed, continue to stir for 4 hours to end the reaction; Washing, filtering,...

Embodiment 3

[0046] A special halogen-free flame retardant synergistic functional masterbatch for polyoxymethylene modification, the preparation method of the multiple compound coated melamine polyphosphate used in it is as follows:

[0047] Add 230L of absolute ethanol, 120kg of melamine polyphosphate, 7.5kg of aluminum sol, and 2kg of zinc oxide sol into the enamel reaction kettle with a stirring and temperature control device, stir evenly and add to 37°C, then add the mass percentage dropwise at an even speed Ammonia water with a content of 12.5wt.%, and the pH value of the reaction solution is controlled at 7.5 to 8.5 to promote the sol-gel reaction between the aluminum sol and the zinc oxide sol. After the addition is completed, continue to stir for 4 hours to end the reaction; Wash, filter, and dry in an oven at 125°C for 8 hours to obtain zinc ion-doped aluminum hydroxide-coated melamine polyphosphate. In another glass container, 3kg of phytic acid was dissolved in 6L of deionized w...

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Abstract

The invention relates to the technical field of plastic modification processing, in particular to a special halogen-free flame-retardant synergistic functional masterbatch for polyoxymethylene modification and a preparation method thereof; It is a flame retardant, and the mass percentage composition of the functional masterbatch is as follows: multiple composite coating melamine polyphosphate 55.0-65.0 wt.%, nitrogen-based flame retardant 20.0-30.0 wt.%, dipentaerythritol 3.0-5.0 wt .%, thermoplastic polyurethane 10.0~12.0 wt.%, dispersant 0.5~1.0 wt.%, lubricant 0.3~0.5 wt.%; compared with the traditional flame retardant functional masterbatch, the functional masterbatch prepared by the present invention significantly improves Improve the thermal stability of melamine polyphosphate, enhance its water resistance, thus more effectively improve the flame retardant effect of melamine polyphosphate on polyoxymethylene.

Description

technical field [0001] The invention relates to the technical field of plastic modification processing, in particular to a special halogen-free flame-retardant and synergistic functional masterbatch for polyoxymethylene modification and a preparation method thereof. Background technique [0002] Polyoxymethylene is a class of engineering plastics with a special molecular chain structure. Although the plastic has excellent comprehensive mechanical properties and electrical insulation properties, the alternating carbon-oxygen main chain structure in its molecular chain makes it the easiest polymer among all polymers. Combustible material, its oxygen index is only 14.9vol.%, which seriously hinders the application of polyoxymethylene in the field of industrial and household electronic appliances. Effective flame retardant modification can be implemented for polyoxymethylene to improve its flame retardancy, thereby improving the safety of its use in electronic and electronic equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L75/06C08K9/10C08K5/3492C08K5/06C08K5/098C08K7/24C08K13/06C08J3/22
CPCC08J3/226C08J2475/08C08J2475/06C08J2359/00C08K9/10C08K5/34928C08K5/06C08K5/098C08K7/24C08K13/06
Inventor 李翰卿汪晓东
Owner 江苏勒诚技术研发有限公司
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