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Polyamide composition and its preparing method

A technology of polyamide composition and polyamide resin, which is applied in the field of modified polyamide, and can solve problems such as harsh requirements, complicated preparation process of composite materials, loss of polyamide impact resistance, etc.

Inactive Publication Date: 2006-05-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents CN1055706C and CN1081207C respectively reported the preparation of polyamide / clay nanocomposites by in-situ intercalation polymerization and melt intercalation. Both methods require organic treatment of montmorillonite to facilitate intercalation, but Complicates the preparation process of composite materials
However, this process has very strict requirements on equipment, and there are certain difficulties in industrialization in the true sense, especially the strict requirements on water discharge.
[0006] The above technologies of using clay materials to modify polyamide can improve the rigidity of polyamide, but at the same time, the impact resistance of polyamide is greatly lost.

Method used

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  • Polyamide composition and its preparing method

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Experimental program
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Effect test

Embodiment 1

[0041] Sodium-based montmorillonite (produced by Zhangjiakou Qinghe Chemical Factory, Hebei Province, with an average thickness of 1.0nm) was mixed with water at a concentration of 5% by weight, dispersed by a high-shear disperser, and left for a period of time. 5Kg of commercially available benzopyridine rubber latex (produced by Changzhihai Latex Co., Ltd., Cixi City, Zhejiang Province, trade mark 5555) with a solid content of 40% weight is placed in the container, and 100 g of trimethylolpropane triacrylate is added dropwise under stirring. , after the dropwise addition was completed, stirring was continued for one hour. Then irradiate with cobalt source, the dose is 2.5 Mrad, and the dose rate is 50Gy / min. The gel content of the rubber particles in the latex after irradiation was 87%, and the average particle size of the particles was 100 nm. The irradiated latex and sodium-based montmorillonite slurry are mixed according to the ratio of 95:5 of their respective dry weigh...

Embodiment 2

[0043] The other conditions are the same as in Example 1 except that the dry weight of the benzopyridine latex and the sodium montmorillonite slurry is 80:20. After spray drying, the compound powder of benzopyridine rubber montmorillonite ( Composite powder 2 ).

Embodiment 3

[0045] Except the 20:80 ratio of the dry weight of the styrene-butadiene rubber latex and the sodium montmorillonite slurry, the rest of the conditions were the same as in Example 1. After spray drying, the compound powder of benzopyridine rubber montmorillonite ( Composite powder 3 ).

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Abstract

The invention provides a polyamide composition and a preparation method thereof, and relates to the technical field of polyamide resin modification. The polyamide composition contains polyamide resin and composite powder. The ratio of the total weight of the composite powder to the total weight of the polyamide fat is (0.5-100):100. The composite powder described therein comprises clay sheets and rubber particles without organic functional groups, and is prepared by uniformly mixing and drying raw materials comprising irradiated or non-irradiated rubber latex and clay slurry. Using the composite powder to modify the polyamide resin can improve the comprehensive performance of the polyamide, improve the heat resistance while making the polyamide resin have good rigidity and toughness, and is suitable for a very wide range of fields.

Description

technical field [0001] The present invention relates to a modified polyamide, and furthermore relates to a composite powder modified polyamide resin composition and a preparation method thereof. Background technique [0002] As an engineering plastic, polyamide has excellent wear resistance, self-lubrication and heat resistance, and it has excellent oil resistance, high mechanical strength, and easy processing and molding. However, due to the strong polarity of polyamide, it has a high water absorption rate, and the strength and elastic modulus decrease greatly after water absorption. Moreover, the heat distortion temperature of polyamide is low, so it is not suitable for applications with higher temperature requirements. In addition, polyamide has low impact strength in dry state and low temperature, showing obvious notch sensitivity and other shortcomings. Therefore, it is very necessary to modify the toughening, strengthening and heat resistance of polyamide. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08K9/00
Inventor 刘轶群东为富乔金梁张晓红高建明黄帆宋志海谭邦会
Owner CHINA PETROLEUM & CHEM CORP