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Polyformaldehyde high-stabilization base masterbatch and preparation method thereof

A polyoxymethylene and stabilization technology is applied in the field of highly stabilized polyoxymethylene basic masterbatch and its preparation, which can solve the problems of decomposition, deterioration of polyoxymethylene performance, loss of use value, etc. The effect of discoloration tendency

Inactive Publication Date: 2016-12-21
江苏互胜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many commercially available polyoxymethylene (POM) will undergo changes and reactions even in normal temperature environments, especially in processing applications at high temperatures, its molecular structure is prone to chain scission and continuous formaldehyde and formic acid reactions to promote thermal decomposition, resulting in The macromolecular chain of polyoxymethylene (POM) is seriously decomposed, which deteriorates the performance of polyoxymethylene (POM) and loses valuable use value

Method used

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  • Polyformaldehyde high-stabilization base masterbatch and preparation method thereof
  • Polyformaldehyde high-stabilization base masterbatch and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] The preparation method of polyoxymethylene highly stabilized basic masterbatch, the homopolyoxymethylene of 50 weight parts, the ethylene copolymer of 50 weight parts, the dicyandiamide of 6 weight parts, the calcium stearate of 6 weight parts, the calcium stearate of 6 weight parts The mixture of antioxidant 1010, 1 weight part of MD-697, 0.3 weight part of silicone oil and KH550, and 0.3 weight part of ethylene bisstearamide were poured into a high-speed mixer at 75°C, stirred for 3 minutes, and After extruded by twin-screw extruder, the polyoxymethylene high stability basic masterbatch is obtained.

[0022] The vinyl acetate content of the ethylene copolymer is 10%.

[0023] The melt flow rate of the homopolyoxymethylene is 1g / 10min.

[0024] The kinematic viscosity of silicone oil is controlled at 0.001m 2 / s, magnesium hydroxide is active nano-scale, and its average particle size is 25nm.

Embodiment 2

[0026] The preparation method of polyoxymethylene highly stabilized basic masterbatch, the homopolyoxymethylene of 75 weight parts, the ethylene copolymer of 75 weight parts, the dicyandiamide of 7 weight parts, the calcium stearate of 12 weight parts, the calcium stearate of 12 weight parts The mixture of antioxidant 1010, 4 parts by weight of MD-697, 3 parts by weight of silicone oil and KH550, and 3 parts by weight of ethylene bisstearamide were poured into a high-speed mixer at 80°C, stirred for 5 minutes, and After extruded by twin-screw extruder, the polyoxymethylene high stability basic masterbatch is obtained.

[0027] The vinyl acetate content of the ethylene copolymer is 25%.

[0028] The melt flow rate of the homopolyoxymethylene is 15g / 10min.

[0029] The kinematic viscosity of silicone oil is controlled at 0.03m 2 / s, magnesium hydroxide is active nano-scale, and its average particle size is 32nm.

Embodiment 3

[0031] The preparation method of polyoxymethylene highly stabilized basic masterbatch, the homopolyoxymethylene of 100 weight parts, the ethylene copolymer of 100 weight parts, the dicyandiamide of 8 weight parts, the calcium stearate of 18 weight parts, the calcium stearate of 18 weight parts The mixture of antioxidant 1010, 6 parts by weight of MD-697, 6 parts by weight of silicone oil and KH550, and 6 parts by weight of ethylene bis-stearamide were poured into a high-speed mixer at 85°C and stirred for 8 minutes. After extruded by twin-screw extruder, the polyoxymethylene high stability basic masterbatch is obtained.

[0032] The vinyl acetate content of the ethylene copolymer is 50%.

[0033] The melt flow rate of the homopolyoxymethylene is 26g / 10min.

[0034] The kinematic viscosity of silicone oil is controlled at -0.06m 2 / s, magnesium hydroxide is active nano-scale, and its average particle size is 40nm.

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Abstract

The invention discloses a polyformaldehyde high-stabilization base masterbatch and a preparation method thereof, wherein polyformaldehyde, an ethylene copolymer, a formaldehyde absorber, a formic acid absorber, an antioxidant, a metal purification agent, a dispersing lubricant A and a dispersing lubricant B are poured into a high-speed mixer in a mixed manner, and extrusion is performed through a twin-screw extruder to prepare the polyformaldehyde high-stabilization base masterbatch. According to the present invention, with the product, the molecular structure change of polyformaldehyde is effectively stabilized, the chain breaking reaction is inhibited, the service life is prolonged, the technology of the polyformaldehyde and the product application scope are expanded, the polyformaldehyde has the broad application field, and the polyformaldehyde high-stabilization base masterbatch is the essential high-stability base masterbatch for research and development of the high performance polyformaldehyde engineering plastic alloy.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to polyoxymethylene highly stabilized basic master batches and a preparation method thereof. Background technique [0002] Polyoxymethylene (POM) is one of the top five engineering plastics in the world today. Its wear resistance and self-lubricating properties are particularly outstanding compared with other engineering plastics. It has a small friction coefficient, good dielectric properties, and strong fatigue and creep resistance. The specific strength and specific stiffness of the material are very close, known as "Saigang" high polymer, widely used in aerospace, aviation, automobile, electronic appliances, precision instruments and other departments as power transmission parts. [0003] However, due to the particularity of the molecular structure of polyoxymethylene (POM), its thermal stability is extremely poor, and it is an unstable high polymer. Many ...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08L59/04C08L23/08C08L83/04C08L31/04C08K5/00C08K5/315C08K5/098C08K5/20C08K13/02C08K5/3492C08K3/22C08K5/103
CPCC08K2201/003C08K2201/011C08L23/0853C08L31/04C08L59/02C08L59/04C08L2201/08C08L2205/03C08L83/04C08K5/00C08K5/3155C08K5/098C08K5/20C08K13/02C08K5/34922C08K2003/2224C08K5/103
Inventor 严希
Owner 江苏互胜新材料科技有限公司