Semiaromatic moulding masses and their applications

一种半芳香族、模塑料的技术，应用在薄料处理、运输和包装等方向，能够解决未报道模塑料热稳定性的改善等问题，达到良好热老化稳定性的效果

Active Publication Date: 2012-12-19
EMS PATENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No improvement in the thermal stability of these molding compounds has been reported

Method used

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  • Semiaromatic moulding masses and their applications
  • Semiaromatic moulding masses and their applications
  • Semiaromatic moulding masses and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment B1～B5 and comparative example V1～V9

[0125] Molding compounds of the compositions given in Tables 1 and 2 were produced on a twin-screw extruder manufactured by Werner and Pfleiderer (type ZSK25). The polyamide pellets are distributed into the feed zone together with the additives, while the glass fibers are distributed into the polymer melt through the side feeder 3 of the housing unit before the nozzle. The housing temperature is set with a ramp up to 330°C. The production capacity of 10kg is realized at 150rpm~200rpm. The properties of the granules were measured after cooling and granulating the polymer strands in a water bath and drying at 120° C. for 24 hours.

[0126] The molding compound was then injection molded into ISO test bodies in an Arburg Allrounder 320-210-750 injection molding machine, provided that the barrel temperature in zones 1-4 was 325°C-340°C and the "cooling temperature" was 130°C .

[0127] figure 1 The results of thermal storage at 250°C are shown. The breaking strength of the mol...

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Abstract

The prevent invention provides a polyamide molding plastic and a moulded parts prepared by the polyamide molding plastic. The molding plastic is composed of (A) a polyamide mixture, (B) fillers and reinforcing agents, (C) thermal stabilizers and (D) additives, wherein the sum total of components (A) to (D) is 100 wt %. The polyamide molding plastic is free of transition metal salts and / or metallic oxides of groups VB, VIB, VIIB or VIIIB of the periodic table. The polyamide mixture consists of (A1) a semiaromatic, semicrystalline polyamide having a melting point of 275 DEG C to 330 DEG C, and (A2) a caprolactam-containing polyamide that is different from (A1) and that has a caprolactam content of at least 50 wt %, where the total caprolactam content is 22-30 wt %, with respect to the polyamide mixture.

Description

technical field [0001] The invention relates to a heat-aging-resistant polyamide molding compound based on semi-crystalline semi-aromatic polyamide, its preparation method and its application. Background technique [0002] Thermoplastic polyamides are often used in the form of glass-fibre-reinforced molding compounds as constituent materials for components that are exposed to high temperatures during their service life, which ends in thermo-oxidative damage. The onset of thermo-oxidative damage, for example in the form of a decrease in mechanical properties, can be delayed by the addition of known thermal stabilizers, but it cannot be prevented permanently. An improvement of the thermal aging stability of polyamides is highly desirable, since through this a longer service life of thermally stressed components can be achieved or the risk of failure thereof can be reduced. Alternatively, the improved heat aging stability also enables parts to be used at higher temperatures. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/06C08L77/02C08K13/04C08K7/14C08K3/34
CPCC08G69/14C08L77/06C08G69/36C08L2205/02C08K5/005C08K7/14C08L77/02C08K3/014Y10T428/1372Y10T428/1352Y10T428/139Y10T428/31725Y10T428/249946Y10T428/31739Y10T428/24994Y10T428/249945C08L77/00C08J5/00
Inventor A·拜尔N·拉姆贝特斯B·霍夫曼M·赫威尔
Owner EMS PATENT AG
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