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Anti-static polyformaldehyde and preparation method thereof

A polyoxymethylene, antistatic technology, applied in the field of antistatic polyoxymethylene and its preparation, can solve the problems of poor thermal stability, charge accumulation, difficult antistatic, etc., to improve tensile strength and elongation at break, antistatic Performance and long-lasting stability, the effect of improving the heat and oxygen aging resistance

Inactive Publication Date: 2016-02-03
YUNNAN YUNTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

POM itself is a material with good electrical insulation properties and does not have electrostatic properties, but it is precisely because of its good electrical insulation properties that it is easy to accumulate conductive charges, which in turn affects the precision of precision instruments, and even electrostatic hazards.
However, POM is one of the resins that are difficult to antistatic. On the one hand, because of its poor thermal stability, the commonly used low-surfactant type antistatic agent has a strong polarity, which is likely to cause POM to be violent during the molding process. Decomposition; on the other hand, due to the small polarity and high crystallinity of POM, the compatibility with general polymer antistatic agents is poor

Method used

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  • Anti-static polyformaldehyde and preparation method thereof

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preparation example Construction

[0022] The present invention also discloses a preparation method of antistatic polyoxymethylene, comprising the following steps:

[0023] a. Polyoxymethylene, polyethylene glycol oleate, dimethyl hydroxyethyl stearylamide ethyl quaternary ammonium nitrate, polyethylene terephthalate, copolymerized nylon, magnesium oxide, copper powder, Antioxidant, light stabilizer, and lubricant are mixed according to the set weight ratio and then added to the extruder, extruded and granulated under reduced pressure and molten state;

[0024] b. Obtain antistatic polyoxymethylene after drying the product pellets of step a.

Embodiment 1

[0026] The antistatic polyoxymethylene of the present embodiment includes the following raw material components in parts by weight: 100 parts of polyoxymethylene, 5 parts of polyethylene glycol oleate, dimethyl hydroxyethyl stearamidoethyl quaternary ammonium nitrate 3 parts, 3 parts of polyethylene terephthalate, 4 parts of copolymerized nylon, 5 parts of magnesium oxide, 3 parts of copper powder, 2 parts of antioxidant, 1 part of light stabilizer, and 1 part of lubricant.

[0027] In this embodiment, the antioxidant is 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, according to this embodiment Parts by weight Replace 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene with 2,4-bis(n-octylsulfide Methylene)-6-methylphenol, 4,4'-methylenebis(2,6-di-tert-butylphenol), tris-(3,5-di-tert-butyl-4-hydroxybenzyl) Similar effects can be achieved when one or more mixtures of isocyanurate and 2,2'-methylenebis(6-cyclohexyl-4-methylphenol) are us...

Embodiment 2

[0032] The antistatic polyoxymethylene of the present embodiment includes the following raw material components in parts by weight: 100 parts of polyoxymethylene, 12 parts of polyethylene glycol oleate, dimethyl hydroxyethyl stearamidoethyl quaternary ammonium nitrate 8 parts, 8 parts of polyethylene terephthalate, 10 parts of copolymerized nylon, 12 parts of magnesium oxide, 10 parts of copper powder, 6 parts of antioxidant, 4 parts of light stabilizer, and 10 parts of lubricant.

[0033]In the present embodiment, the antioxidant is 2,4-bis(n-octylthiomethylene)-6-methylphenol, and 2,4-bis(n-octylthiomethylene) Methylene)-6-methylphenol was replaced by 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 4,4 '-methylenebis(2,6-di-tert-butylphenol), tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 2,2'-methylene When one or more mixtures of two (6-cyclohexyl-4-methylphenol) have similar effects.

[0034] In this example, the light stabilizer is 2-(2'-3'...

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Abstract

The invention discloses anti-static polyformaldehyde, which comprises the following raw materials in parts by weight: 100 parts of polyformaldehyde, 5-12 parts of oleic acid polyglycol ester, 3-8 parts of dimethyl hydroxyethyl stearamide-ethyl quaternary ammonium nitrate, 3-8 parts of polyethylene glycol terephthalate, 4-10 parts of copolymer nylon, 5-12 parts of magnesium oxide, 3-10 parts of copper powder, 2-6 parts of an antioxidant, 1-4 parts of a light stabilizer and 1-10 parts of a lubricating agent. An antistatic component and the polyformaldehyde have appropriate compatibility; the condition that a proper amount of antistatic component migrates to the surface from the inside of the polyformaldehyde is ensured to reach certain surface concentration; when the antistatic component on the surface is washed by a solvent or removed by friction in use, the antistatic component in the polyformaldehyde can further migrate outwards to restore the antistatic effect; the antistatic property is good, lasting and stable; and the problem of intense decomposition of POM in the molding and processing processes can be effectively solved, so that the thermal-oxidative-ageing property of the polyformaldehyde is improved; and the tensile strength and the breaking elongation are improved.

Description

technical field [0001] The invention relates to a polymer engineering plastic, in particular to an antistatic polyoxymethylene and a preparation method thereof. Background technique [0002] Polyoxymethylene (POM) is a linear polymer with high crystallinity containing repeating units of oxymethylene (-CHO-) in the molecular backbone. POM material has excellent physical and mechanical properties, high mechanical strength and rigidity, good self-lubrication and wear resistance, good dimensional stability, especially excellent fatigue resistance, creep resistance and chemical resistance, etc. features. Therefore, POM is widely used in the automotive industry, electronic appliances, precision machinery, hardware and building materials and other fields... But it also has some shortcomings, such as low impact toughness, poor heat resistance, and high electrical resistance. When POM is used as various parts in recording media equipment or in dusty working environments, these par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L67/02C08L77/00C08L71/02C08K13/02C08K5/20C08K3/22C08K3/08C08K5/3475C08K5/132
Inventor 陈玉仙冯志强樊钹张海涛普雪涛江林张红伟唐燕
Owner YUNNAN YUNTIANHUA
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