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Polyformaldehyde composition and preparation method thereof

A polyoxymethylene composition and technology of polyoxymethylene, applied in the field of polymer materials, can solve problems such as strong odor and poor wear resistance, and achieve the effects of improving dispersion, excellent mechanical properties, and feeding saturation

Inactive Publication Date: 2018-12-07
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a polyoxymethylene composition and its preparation method, which solves the technical problems of poor wear resistance and strong odor of the polyoxymethylene material in the prior art

Method used

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  • Polyformaldehyde composition and preparation method thereof

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preparation example Construction

[0026] Preparation of odor adsorption masterbatch: 100 parts of high-density polyethylene, 10 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 10 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano-silica, hard 1 part of calcium fatty acid and 5 parts of melamine were mixed evenly, and then extruded and granulated in a twin-screw extruder to obtain odor-absorbing masterbatches.

[0027] The molecular weight of ultra-high molecular weight polyethylene is 4.8 million, and the elongation at break is 3%-10%.

[0028] High-density polyethylene has a crystallinity of 80% and a molecular weight of 300,000.

[0029] The lubricant is at least one of silicone powder, white oil, silicone oil, paraffin, stearic acid and zinc stearate.

Embodiment 1

[0031] The polyoxymethylene composition of this example is made of the following raw materials in parts by weight: 70 parts of polyoxymethylene, 25 parts of ultra-high molecular weight polyethylene modified glass fiber, 3 parts of odor absorption masterbatch, 0.5 part of molybdenum disulfide, and 1 part of silicone powder. Part, 0.5 part of antioxidant 1098, 0.5 part of antioxidant 168;

[0032] The preparation method of the present embodiment polyoxymethylene composition comprises the following steps:

[0033] S1. After washing and drying the glass fiber, immerse it in the ultra-high molecular weight polyethylene dispersion, take it out and dry it, bake and sinter at 190°C to obtain the ultra-high molecular weight polyethylene modified glass fiber;

[0034] S2. Weigh each raw material in parts by weight, pour polyoxymethylene, odor absorption masterbatch, molybdenum disulfide, lubricant, and antioxidant into a mixer, stir evenly and place it in a twin-screw extruder, and put ...

Embodiment 2

[0037] The polyoxymethylene composition of this example is made of the following raw materials in parts by weight: 54 parts of polyoxymethylene, 45 parts of ultra-high molecular weight polyethylene modified glass fiber, 1 part of odor absorption masterbatch, 0.2 part of molybdenum disulfide, 0.2 part of silicone powder Part, 0.1 part of antioxidant 1098, 0.1 part of antioxidant 168;

[0038] The preparation method of the present embodiment polyoxymethylene composition comprises the following steps:

[0039] S1. After washing and drying the glass fiber, immerse it in the ultra-high molecular weight polyethylene dispersion, take it out and dry it, bake and sinter at 210°C to obtain the ultra-high molecular weight polyethylene modified glass fiber;

[0040] S2. Weigh each raw material in parts by weight, pour polyoxymethylene, odor absorption masterbatch, molybdenum disulfide, lubricant, and antioxidant into a mixer, stir evenly and place it in a twin-screw extruder, and put the ...

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Abstract

The invention provides a polyformaldehyde composition and a preparation method thereof, and relates to the technical field of high polymer materials. The polyformaldehyde composition is prepared fromthe following raw materials: polyformaldehyde, ultra-high-molecular-weight polyethylene modified glass fibers, odor-adsorption master batches, molybdenum disulfide, a lubricant and an antioxidant. Thepolyformaldehyde composition disclosed by the invention has low odor and good wear resistance and stability. Through the adoption of the matching effect of the raw materials such as the ultra-high-molecular-weight polyethylene modified glass fibers, the odor-adsorption master batches and the like, the low-odor characteristic of the polyformaldehyde composition is ensured, and the physical and mechanical properties of the polyformaldehyde composition and the moulding processability of the material are not affected at the same time.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyoxymethylene composition and a preparation method thereof. Background technique [0002] Polyoxymethylene is an engineering plastic with excellent comprehensive properties. It has extremely high strength and rigidity, good dimensional stability, excellent fatigue resistance, creep resistance, self-lubrication and wear resistance. It is used in machinery, automobiles, It is widely used in the manufacture of various parts with low friction and wear resistance in electronics, home appliances and building materials. [0003] However, polyoxymethylene has poor thermal stability at high temperatures, is easy to decompose, has a narrow processing temperature, and has poor aging resistance, so it can only be used under low speed and low load conditions. In order to use polyoxymethylene under high-speed, high-load and harsh conditions, it is necessary to further reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L23/06C08K13/06C08K9/08C08K7/14C08K3/34C08K3/04C08K7/26C08K5/098C08K3/36C08K5/3492C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29B9/06C08J3/226C08J2359/00C08J2423/06C08K2201/011C08K2201/014C08L59/00C08L2205/03C08L2207/062C08L23/06C08K13/06C08K9/08C08K7/14C08K3/34C08K3/04C08K7/26C08K5/098C08K3/36C08K5/34922
Inventor 杨桂生吴安琪范继贤
Owner HEFEI GENIUS NEW MATERIALS
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