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Weatherability type polyformaldehyde material and its preparation method

A polyoxymethylene material, weather-resistant technology, applied in the field of weather-resistant polyoxymethylene material and its preparation, can solve the problems of artificial accelerated weather aging test, ultraviolet light aging test, thermal oxygen aging test and hot water aging test, etc., to achieve easy The effect of industrial production, simple manufacturing method, and easy raw materials

Inactive Publication Date: 2005-05-25
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on POM modification, mainly toughening and strengthening modification, but less research on POM weather resistance modification, and the related reports mainly involve modification system formula, such as Japanese patent JP 06279651 A2, world patent WO 9502012 A1, Japanese Patent JP 11343383 A2, Japanese Patent JP 11021416 A2, Japanese Patent JP 09071715 A2, World Patent WO 9709383 A1, Japanese Patent JP 94-105776, German Patent DE 4442123 A1, European Patent EP 655482A2, German Patent DE 4442167 A1, etc. , seldom involve the comparison of the comprehensive mechanical properties (including impact strength, bending strength, tensile strength and elongation at break, etc.) of the modified system after artificial accelerated weathering test for a certain period of time and the mechanical properties before aging See the simultaneous artificial accelerated weather aging test, ultraviolet light aging test, thermal oxygen aging test and hot water aging test for polyoxymethylene products
There is no weather-resistant polyoxymethylene product with excellent weather aging resistance, good UV aging resistance, heat oxygen aging resistance and hot water aging resistance.

Method used

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  • Weatherability type polyformaldehyde material and its preparation method
  • Weatherability type polyformaldehyde material and its preparation method
  • Weatherability type polyformaldehyde material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 1000 g of polyoxymethylene to 10 g of liquid paraffin, mix well, then add 3 g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, dilauryl thiodipropionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, succinic acid and 4-hydroxy-2,2,6, 0.5g of 6-tetramethyl-1-piperidinol polymer, fully stirred and mixed evenly, then placed in a twin-screw extruder, melted, blended and extruded at a temperature of 140-220°C, and then pelletized by a pelletizer , to obtain a weather-resistant polyoxymethylene material, which is injection molded at a temperature of 170-190°C.

Embodiment 2

[0038] Add 1000 g of polyoxymethylene to 10 g of liquid paraffin, mix well, then add 30 g of nano-zinc oxide, 3 g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, dithiodi Dilauryl propionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, succinic acid and 4-hydroxy-2 , 0.5g of the polymer of 2,6,6-tetramethyl-1-piperidinol, fully stirred and mixed evenly, then placed in a twin-screw extruder, melted and blended at a temperature of 150-210°C, and then The weather-resistant polyoxymethylene material is obtained by cutting pellets with a pelletizer, and injection molding is performed at a temperature of 170-200°C.

Embodiment 3

[0040] Add 1000 g of polyoxymethylene to 20 grams of liquid paraffin, mix well, then add tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol 3 g, dilauryl thiodipropionate 1.5g, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 0.5g, stir well and mix well, then place in twin-screw extruder , melt blending and extrusion at a temperature of 140-210°C, and then pelletized by a pelletizer to obtain a weather-resistant polyoxymethylene material, which is injection-molded at a temperature of 170-200°C.

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Abstract

An anti-weathering polyoxymethylene material is prepared from atoleine and polyoxymethylene through proportioning, surface wetting, adding inorganic particles, optical stabilizer and thermooxidative stabilizer, fusing, pugging, extruding out for granulating, and injection moulding. Its advantage is high resistance to weathering, UV, thermooxidizing and hot water.

Description

1. Technical field [0001] The invention relates to a weather-resistant polyoxymethylene material and a preparation method thereof, belonging to the field of polymer modification and processing. 2. Background technology [0002] Polyoxymethylene has excellent comprehensive properties and is one of the five major engineering plastics. However, due to the structural characteristics, the weather resistance of polyoxymethylene is poor, so its application is limited. Improving the weather resistance and anti-aging performance of POM is an important measure to improve the grade of POM, broaden the application range of POM, and develop the POM industry. At present, there are many studies on POM modification, mainly toughening and strengthening modification, but less research on POM weather resistance modification, and the related reports mainly involve modification system formula, such as Japanese patent JP 06279651 A2, world patent WO 9502012 A1, Japanese Patent JP 11343383 A2, J...

Claims

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Application Information

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IPC IPC(8): B29C47/40C08K5/10C08L59/02
Inventor 淡宜蔡绪福赵红军任显诚陈山玉刘和兴王志春普雪涛
Owner SICHUAN UNIV
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