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Melamine free composite addictive for polyoxymethylene

A melamine and composite technology, which is applied in the field of polymer organic antioxidant and light stabilizer complex, to eliminate free radicals, improve thermal stability, and stabilize antioxidant effects

Inactive Publication Date: 2015-10-28
FDC LEES CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regardless of the copolymerization or substitution reaction, the molecular structure of polyoxymethylene still has the problem of autooxidation.

Method used

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  • Melamine free composite addictive for polyoxymethylene
  • Melamine free composite addictive for polyoxymethylene
  • Melamine free composite addictive for polyoxymethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] It should be noted that the manufacturing method of the polyoxymethylene compound is to mix the above ingredients evenly, and then put them into a twin-screw extruder for extrusion, and there are 13 temperature settings for each section of the extruder, and they are respectively 180°C, 200°C ℃, 200℃, 200℃, 200℃, 200℃, 200℃, 200℃, 200℃, 200℃, 200℃, 200℃, 180℃. The rotational speed of the main screw is 200 rpm, and the residence time is 30 seconds. The extrudate will go through the process of cooling, air drying, cutting and drying to prepare polyoxymethylene compound with melamine-free compound additive.

[0026] Example 2

Embodiment 2

[0028] Example 3

Embodiment 3

[0030] Example 4

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PUM

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Abstract

A melamine free composite additive used in polyoxymethylene is provided. The composite additive includes an amine stabilizer and antioxidant. The composition of the amine stabilizer is 0.01 to 3 parts by weight per 100 parts by weight of the polyoxymethylene. The composition of the antioxidant is 0.05 to 3 parts by weight per 100 parts by weight of the polyoxymethylene. The composite additive enhances the light stability and thermal stability of the polyoxymethylene.

Description

technical field [0001] The invention relates to a complex of high molecular organic antioxidant and light stabilizer, in particular to a complex of high molecular organic antioxidant and light stabilizer for polyoxymethylene. Background technique [0002] Polyoxymethylene is a polymer with high crystallinity and high melting point. Polyoxymethylene has poor thermal stability, and when heated, it will release small molecular weight substances such as formaldehyde or formic acid, causing the plastic to crack. Therefore, the industry adopts the method of copolymerization to modify polyoxymethylene to improve its thermal stability. For example, it can be copolymerized with cyclic ether compounds, and the thermal stability of polyoxymethylene can be improved through a small amount of carbon-carbon (cc) copolymerized chains in the copolymer. In European Patent EP.128739 (1984), trioxane (trioxane) is used to carry out copolymerization reaction with polyoxymethylene. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08K13/02C08K5/3435C08K5/17C08K5/098C08K3/26C08K5/20C08K5/103
CPCC08K5/34924C08K5/103C08K5/13C08K5/134C08K5/20C08K5/3435
Inventor 谢树泓陈桢凯李昆昌
Owner FDC LEES CHEM IND