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Highly flowing halogen-free flame-retardant enhanced PA66 composition

A technology of PA66 and composition, which is applied in the field of high-flow halogen-free flame-retardant PA66 composition and its preparation, can solve problems such as the limitation of application prospects, and achieve the effects of cost reduction, simple and efficient preparation method, and excellent mechanical and mechanical properties

Inactive Publication Date: 2019-03-15
NANTONG XINGCHEN SYNTHETIC MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluidity of materials can be characterized by the index of melt flow rate. The current technology can only reach MFI<40g / 10min (275°C, 5Kg), and its application prospect in the product of complex molding structure with multiple cavities in one mold will be greatly affected. limits

Method used

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  • Highly flowing halogen-free flame-retardant enhanced PA66 composition
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  • Highly flowing halogen-free flame-retardant enhanced PA66 composition

Examples

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Embodiment Construction

[0018] The raw materials are weighed according to the percentages by weight of the raw materials in the embodiment composition shown in Table 1, and the raw materials other than the chopped glass fibers are fully mixed by the mixing equipment and then put into the feeding port of the twin-screw extruder, chopped The glass fiber is added to the extruder by measuring the feed, and all the materials are melted and mixed and extruded to pelletize; the melt temperature of Example 1 is 254°C, the melt temperature of Example 2 is 262°C, and the melt temperature of Example 3 is The melting temperature of the compound is 258° C.; the performance test is performed after the pellets are dried or prepared into a standard sample. The performance test results of the composition of the example are shown in Table 2. The application evaluation results of the compositions of the examples are shown in Table 3. See Table 4 for the application evaluation results of the comparative composition (wit...

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Abstract

The invention discloses a highly flowing halogen-free flame-retardant enhanced PA66 composition and a preparation method thereof. The composition is composed of PA66, a halogen-free flame retardant, an antioxidant, a flowing improver, a lubricant and short glass fibers. The preparation method comprises the following steps: fully mixing all raw materials except the short glass fibers and adding theraw materials into a feed inlet of a twin-screw extruder; adding the short glass fibers into the twin-screw extruder through a lateral feed inlet; and melting, mixing, extruding and granulating all the materials, wherein the melt temperature of the materials from a homogenizing section to a mouth model is 220-300 DEG C. The composition not only has thin-walled flame retardant property and excellent mechanical property, but also has ultrahigh flowing property. The melt index reaches up to 90 g / 10 min above, and the demand on model structure thin wall, miniature, complication and the like and the cost-lowering demand of multiple holes of one mold can be met. The preparation method is simple and efficient.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-fluidity halogen-free flame-retardant PA66 composition and a preparation method thereof, which can be applied to a complex molding structure with multiple cavities in one mold, such as computer motherboard memory slots. Background technique [0002] PA66 engineering plastics are widely used in the automotive industry and electronic appliances because of their excellent impact resistance and high strength. On January 23, 2003, the European Parliament and the Council of the European Union adopted No. 2002 / 95 / EC "Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Directive", restricting the use of certain brominated flame retardants in electrical and electronic products The application of halogen-free flame-retardant composite materials has become the development trend in recent years. With the requirements of lightweight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/04C08K7/14C08K5/5313C08K5/523C08J5/04
CPCC08J5/043C08J2377/06C08K5/523C08K5/5313C08K7/14C08K13/04C08L2201/02C08L2201/22C08L77/06
Inventor 张义盛汪永斌戴伍国姚君肖春燕
Owner NANTONG XINGCHEN SYNTHETIC MATERIAL
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