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Novel polyformaldehyde composite material and preparation method thereof

A composite material and polyoxymethylene technology, applied in the field of new polyoxymethylene composite material and its preparation, can solve the problems of difficult to achieve toughening purpose, inconvenient processing, poor compatibility, etc., and achieve improved mechanical properties, wear resistance, notch impact The effect of improving strength and suppressing thermal degradation

Inactive Publication Date: 2019-05-14
安徽华米生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, the modification of polyoxymethylene is mainly to add thermoplastic polyurethane, modified polyolefin, polyamide, polyether, polyester, etc. to polyoxymethylene to improve the toughness of polyoxymethylene, but the difference between polyoxymethylene and such tougheners Poor compatibility, it is difficult to achieve the expected toughening purpose
On the other hand, the thermal stability of polyoxymethylene is usually improved by mixing it with nitrogen-containing compounds, so that the active hydrogen on the amide group has a good addition effect on formaldehyde, and because nitrogen-containing compounds are basic, It can be neutralized with formic acid and other acidic products to slow down acidolysis, thereby improving the heat resistance of polyoxymethylene, but nitrogen-containing compounds are easy to volatilize during melting processing, and migrate to form mold scale, which brings inconvenience to processing

Method used

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  • Novel polyformaldehyde composite material and preparation method thereof
  • Novel polyformaldehyde composite material and preparation method thereof
  • Novel polyformaldehyde composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A preparation method of a novel polyoxymethylene composite material, comprising the following steps:

[0043] (1) Weigh 100 parts of POM, 9.8 parts of modified fillers, 17.5 parts of heat stabilizer and 0.5 parts of lubricant and add them to the high mixer and mix them at room temperature for 8 minutes to obtain the mixed material;

[0044] (2) Add the mixed material prepared in the step (1) into a twin-screw extruder, melt, extrude, and granulate to obtain a novel polyoxymethylene composite material. Among them, the temperature of the first zone of the twin-screw extruder is 80°C, the temperature of the second zone is 130°C, the temperature of the third zone is 160°C, the temperature of the fourth zone is 160°C, the temperature of the fifth zone is 180°C, and the temperature of the sixth zone is 200°C; The head temperature is 190°C; the twin-screw host speed is 150r / min.

Embodiment 2

[0046] A preparation method of a novel polyoxymethylene composite material, comprising the following steps:

[0047] (1) Weigh 100 parts of POM, 14 parts of modified fillers, 17.5 parts of heat stabilizer and 0.6 parts of lubricant and add them to the high mixer and mix them at room temperature for 8 minutes to obtain the mixed material;

[0048] (2) Add the mixed material prepared in the step (1) into a twin-screw extruder, melt, extrude, and granulate to obtain a novel polyoxymethylene composite material. Among them, the temperature of the first zone of the twin-screw extruder is 80°C, the temperature of the second zone is 130°C, the temperature of the third zone is 160°C, the temperature of the fourth zone is 160°C, the temperature of the fifth zone is 180°C, and the temperature of the sixth zone is 200°C; The head temperature is 190°C; the twin-screw host speed is 150r / min.

Embodiment 3

[0050] A preparation method of a novel polyoxymethylene composite material, comprising the following steps:

[0051] (1) Weigh 100 parts of POM, 18 parts of modified fillers, 17.5 parts of heat stabilizer and 0.8 parts of lubricant and add them to the high mixer and mix at room temperature for 8 minutes to obtain the mixed material;

[0052] (2) Add the mixed material prepared in the step (1) into a twin-screw extruder, melt, extrude, and granulate to obtain a novel polyoxymethylene composite material. Among them, the temperature of the first zone of the twin-screw extruder is 80°C, the temperature of the second zone is 130°C, the temperature of the third zone is 160°C, the temperature of the fourth zone is 160°C, the temperature of the fifth zone is 180°C, and the temperature of the sixth zone is 200°C; The head temperature is 190°C; the twin-screw host speed is 150r / min.

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Abstract

The invention discloses a novel polyformaldehyde composite material. The novel polyformaldehyde composite material is prepared through the following steps of (1) weighing out and feeding, by weight part, 100 parts of POM (polyoxymethylene), 10-20 parts of modified filler, 10-26 parts of heat stabilizer and 0.1-1 part of lubricant into a high-speed mixer for mixing at normal temperature for 5-10 min to obtain a mixed material; (2) feeding the mixed material into a double-screw extruder for melting, extrusion and pelletizing. The modified filler is prepared by compounding zinc oxide whisker, mica and zirconium oxide at a weight ratio of 1:4:2; the heat stabilizer is prepared by compounding beta-(3, 5-di-tert-butyl-4-hydroxybenzyl) n-octadecanol propionate and attapulgite. The prepared novelpolyformaldehyde composite material is excellent in mechanical performance, wear resistance and heat resistance.

Description

technical field [0001] The invention relates to the technical field of modification of engineering plastics, in particular to a novel polyoxymethylene composite material and a preparation method thereof. Background technique [0002] POM (Polyoxmethylene, referred to as POM) is a linear highly crystalline polymer with repeating units of oxymethylene (-CH2O-) in its molecular chain. Its molecular chain configuration is regular and its crystallinity is high. The speed is very fast, and it is easy to form large radioactive spherulites, so polyoxymethylene is an unbranched thermoplastic engineering plastic with high crystallinity, high density, and high melting point. Polyoxymethylene has high elastic modulus, rigidity, hardness, tensile strength, fatigue resistance and impact strength. It is known as metal plastic and can be used to replace metal and alloy products. It is widely used in the automotive industry, electronic appliances, Household appliances, precision instruments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08K13/06C08K9/10C08K9/04C08K9/06C08K7/08C08K3/34C08K3/22C08K5/134B29B9/06B29C48/92
Inventor 汪龙翔刘卫伟
Owner 安徽华米生物科技有限公司
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