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A kind of high temperature resistant non-discoloration polypropylene alloy material and preparation method thereof

An alloy material, polypropylene technology, applied in the polymer field, can solve problems such as limiting the use range of filling and toughening PP

Active Publication Date: 2019-02-22
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polypropylene (PP) modified by filling and toughening will change color when heated, which limits the scope of use of filled and toughened PP in high temperature and heat-resistant environments
At present, there have been many newspapers and magazines at home and abroad that have discussed in detail the thermal discoloration of some small molecular substances, but there are not many reports on the thermal discoloration of macromolecular polymers. As the temperature of the aqueous solution changes, the hydrophilic-hydrophobic properties of its molecular chains change, and the increase in temperature causes the molecular chains to shrink to spherical particles, and the state of the polymer in the solution undergoes a coil-pellet transition, resulting in a color change.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 50 parts of transparent PP, 10 parts of POE, 10 parts of talc, 0.05 parts of tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester antioxidant, 0.05 parts of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, where PP, POE, and talc have the same refractive index. Mix for 5 minutes in a high-speed mixer, and extrude and granulate the uniformly mixed materials in a twin-screw extruder. The temperature of the extruder is set to: 190°C in zone I, 195°C in zone II, 200°C in zone III, 205°C in zone IV, 220°C in zone V, 220°C in zone VI, 180°C in zone Ⅶ, 185°C in zone VIII, and die head 185 ℃, after the material is extruded, it is cooled and pelletized, and the sample is made of injection molding grade, and tested after being placed at a constant temperature of 23 ℃ for 16 hours. The performance test results are shown in Table 1.

Embodiment 2

[0024] Weigh 65 parts of transparent PP, 20 parts of EPDM, 10 parts of calcium carbonate, 0.15 parts of tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester antioxidant, 0.15 parts of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, where PP, POE, and talc have the same refractive index. Mix for 5 minutes in a high-speed mixer, and extrude and granulate the uniformly mixed materials in a twin-screw extruder. The temperature of the extruder is set to: 190°C in zone I, 195°C in zone II, 200°C in zone III, 205°C in zone IV, 220°C in zone V, 220°C in zone VI, 180°C in zone Ⅶ, 185°C in zone VIII, and die head 185 ℃, after the material is extruded, it is cooled and pelletized, and the sample is made of injection molding grade, and tested after being placed at a constant temperature of 23 ℃ for 16 hours. The performance test results are shown in Table 1.

Embodiment 3

[0026] Weigh 57 parts of transparent PP, 15 parts of POE, 15 parts of barium sulfate, 0.1 part of tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester antioxidant, 0.1 part of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, where PP, POE, and talc have the same refractive index. Mix for 5 minutes in a high-speed mixer, and extrude and granulate the uniformly mixed materials in a twin-screw extruder. The temperature of the extruder is set to: 190°C in zone I, 195°C in zone II, 200°C in zone III, 205°C in zone IV, 220°C in zone V, 220°C in zone VI, 180°C in zone Ⅶ, 185°C in zone VIII, and die head 185 ℃, after the material is extruded, it is cooled and pelletized, and the sample is made of injection molding grade, and tested after being placed at a constant temperature of 23 ℃ for 16 hours. The performance test results are shown in Table 1.

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PUM

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Abstract

The invention relates to a high-temperature-resistant and color-changing polypropylene alloy material, which is prepared from 50-65 parts of polypropylene, 20-30 parts of modifier, and 0.1-0.3 part of antioxidant through mixing, extrusion and granulation. ; Wherein the modifier is a filler and a toughening agent, the polypropylene is a transparent polypropylene, and the transparent polypropylene and the modifier have the same refractive index value. In the present invention, a modifier with the same refractive index value as the transparent polypropylene is added, which may cause secondary crystallization of the polypropylene when heating up, thereby ensuring the high temperature resistance and no discoloration of the material, and can be widely used in the field of medical equipment.

Description

Technical field [0001] The invention relates to the field of polymer technology, in particular to a high-temperature resistant non-coloring polypropylene alloy material and a preparation method thereof. Background technique [0002] Filled and toughened polypropylene (PP) will undergo color changes when heated, which limits the application range of filled and toughened PP in high temperature and heat resistant environments. At present, many newspapers and magazines at home and abroad have conducted detailed discussions on the thermal discoloration of some small molecular substances, but there are not many reports on the thermal discoloration of macromolecular polymers. The thermal discoloration mechanism of macromolecular polymers is that the polymer is As the temperature of the aqueous solution changes, the hydrophilic-hydrophobicity of the molecular chain changes. The increase in temperature causes the molecular chain to shrink to a spherical particle, and the state of the poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K3/34C08K3/26C08K3/30C08K5/134C08K5/526B29B9/06
CPCB29B9/06B29C48/92B29C2948/92704C08L23/12C08L2201/08C08L23/0815C08K3/34C08K5/1345C08K5/526C08L23/16C08K2003/265C08K2003/3045
Inventor 杨桂生刘凯
Owner HEFEI GENIUS NEW MATERIALS