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Ultraviolet-resistant POM (polyoxymethylene) material and preparation method thereof

An anti-ultraviolet and anti-ultraviolet agent technology, applied in the field of materials, can solve problems such as POM fracture, safety hazards, and reduction of material mechanical strength, and achieve good weather resistance

Inactive Publication Date: 2014-05-07
NANTONG RED STONE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing modification of POM is mainly an improvement of its toughness, but with the wide use of polyoxymethylene products, there are more and more requirements for its performance in outdoor use, such as weather resistance and UV resistance etc. Due to the particularity of POM’s molecular structure, its weather resistance is poor. When it is used outdoors for a long time, it is not resistant to sunlight and ultraviolet radiation, and it is easy to age and degrade, causing the chain of POM to break, thereby reducing the mechanical strength of the material. While bringing certain safety hazards, it reduces the service life of polyoxymethylene materials outdoors. These deficiencies greatly limit the application of POM in various fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 60kg of POM, 3kg of 2-hydroxy-4-n-octyloxybenzophenone, 5kg of dimethyl 4-methoxybenzylidene malonate, TiO 2 3kg and antioxidant 1010 0.2 kg;

[0024] (2) After the above raw materials are fully mixed, they are placed in a twin-screw extruder, melted and extruded, and granulated;

[0025] The aspect ratio of the twin-screw extruder is 39:1; the temperature of the first zone of the twin-screw extruder is 150°C, the temperature of the second zone is 160°C, the temperature of the third zone is 180°C, and the temperature of the fourth zone is 190°C. ℃.

[0026] The test results of the prepared materials are shown in Table 1.

Embodiment 2

[0028] (1) Weigh 80kg of POM, 2kg of 2-hydroxy-4-n-octyloxybenzophenone, 2kg of dimethyl 4-methoxybenzylidene malonate, TiO 2 1kg and antioxidant 1010 1kg;

[0029] (2) After the above raw materials are fully mixed, they are placed in a twin-screw extruder, melted and extruded, and granulated;

[0030] The aspect ratio of the twin-screw extruder is 39:1; the temperature of the first zone of the twin-screw extruder is 150°C, the temperature of the second zone is 160°C, the temperature of the third zone is 180°C, and the temperature of the fourth zone is 190°C. ℃.

[0031] The test results of the prepared materials are shown in Table 1.

Embodiment 3

[0033] (1) Weigh 70kg of POM, 5kg of 2-hydroxy-4-n-octyloxybenzophenone, 3kg of dimethyl 4-methoxybenzylidene malonate, TiO 2 2kg and antioxidant 1010 0.6kg;

[0034] (2) After the above raw materials are fully mixed, they are placed in a twin-screw extruder, melted and extruded, and granulated;

[0035] The aspect ratio of the twin-screw extruder is 39:1; the temperature of the first zone of the twin-screw extruder is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 190°C, and the temperature of the fourth zone is 200°C ℃.

[0036] The test results of the prepared materials are shown in Table 1.

[0037] Table 1

[0038] standard test Example 1 Example 2 Example 3 Notched impact strength (J / m) ASTM D256 178 168 181 Notch impact strength after 300h (J / m) ASTM D256 145 125 152

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PUM

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Abstract

The invention belongs to the field of materials, and discloses an ultraviolet-resistant POM (polyoxymethylene) material and a preparation method thereof. The ultraviolet-resistant POM material mainly contains the following components in parts by weight: 60 to 80 parts of POM, 2 to 5 parts of weather resisting agent, 2 to 5 parts of ultraviolet resisting agent, 1 to 3 parts of light stabilizer and 0.2 to 1 part of antioxidant 1010. The method comprises the following steps: fully mixing the raw materials; and performing melting extrusion and granulation on the raw materials in a double-screw extruder, thereby obtaining the ultraviolet-resistant POM material. The prepared ultraviolet-resistant POM material is good in weather resistance and ultraviolet resistance; the good mechanical strength of the POM is maintained.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to an anti-ultraviolet POM material and a preparation method thereof. Background technique [0002] As a synthetic polymer material, polyoxymethylene (POM) has high mechanical strength, good wear resistance, self-lubrication and toughness, and is widely used in automobiles, electronics and other industries. [0003] The existing modification of POM is mainly an improvement of its toughness, but with the wide use of polyoxymethylene products, there are more and more requirements for its performance in outdoor use, such as weather resistance and UV resistance etc. Due to the particularity of POM’s molecular structure, its weather resistance is poor. When it is used outdoors for a long time, it is not resistant to sunlight and ultraviolet radiation, and it is easy to age and degrade, causing the chain of POM to break, thereby reducing the mechanical strength of the material. While...

Claims

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Application Information

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IPC IPC(8): C08L59/00C08K13/02C08K5/132C08K5/11C08K3/22C08K5/134B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 石磊
Owner NANTONG RED STONE TECH DEV
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