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Scratch-resistant polyamide composition and preparation method thereof

A polyamide composition and a scratch-resistant technology, which are applied in the field of scratch-resistant polyamide compositions and their preparation, can solve the problem of polyamide not being scratch-resistant, and achieve the effect of good scratch resistance

Inactive Publication Date: 2017-12-29
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that polyamide is not scratch-resistant, and provides a scratch-resistant polyamide composition and its preparation method

Method used

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  • Scratch-resistant polyamide composition and preparation method thereof
  • Scratch-resistant polyamide composition and preparation method thereof
  • Scratch-resistant polyamide composition and preparation method thereof

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preparation example Construction

[0042] A preparation method of scratch-resistant polyamide composition, comprising the following steps:

[0043] 1) Weigh all components except glass fiber in proportion, stir and mix to obtain premix;

[0044] 2) Add the premix to the main feed port of the twin-screw extruder, add glass fiber from the side feed port, and extrude and granulate to obtain a scratch-resistant polyamide composition.

[0045] Preferably, the mixing conditions in step 1) are: temperature: normal temperature; stirring speed: 60-120 rpm; stirring time 1-5 minutes.

[0046] Preferably, the twin-screw extruder in step 2) is a toothed co-rotating parallel twin-screw extruder with an aspect ratio of ≥32:1; further preferably, the aspect ratio of the twin-screw extruder in step 2) It is (36~40):1.

Embodiment 1

[0049] The following raw materials are used:

[0050] Polyamide (PA66EPR27) 74.6kg;

[0051] Glass fiber (ECS301CL-3 alkali-free glass fiber processed by silane coupling from Chongqing International Composite Materials Co., Ltd.) 10kg;

[0052] Organosiloxane (GM100) 4kg;

[0053] Polytetrafluoroethylene (TF9207) 0.4kg;

[0054] Polyethylene-(meth)acrylic acid ionomer (sarin resin 8940) 10kg;

[0055] Antioxidant (Tianjin Rianlong New Materials Co., Ltd. 1098 and 168 are matched at 1:1) 0.5kg;

[0056] Lubricant (Honeywell AC540) 0.5kg.

[0057] Put the components other than the glass fiber into the high-speed mixer according to the weight percentage, and stir for 1-5 minutes under the conditions of normal temperature and 120 r / min to prepare the premix; select the teeth with an aspect ratio of 36:1. Type co-rotating parallel twin-screw extruder, the temperature range of each zone is 245-305 ℃, the premix is ​​fed into the extruder through the main feed port of the twin-s...

Embodiment 2

[0059] The following raw materials are used:

[0060] Polyamide (PA66EPR27) 50.8kg;

[0061] Glass fiber (ECS301CL-3 alkali-free glass fiber processed by silane coupling from Chongqing International Composite Materials Co., Ltd.) 40kg;

[0062] Organosiloxane (GM100) 2kg;

[0063] Polytetrafluoroethylene (TF9207) 0.6kg;

[0064] Polyethylene-(meth)acrylic acid ionomer (sarin resin 8940) 5kg;

[0065] Antioxidant (Tianjin Rianlong New Materials Co., Ltd. 1098 and 168 are matched at 1:1) 0.6kg;

[0066] Lubricant (Honeywell AC540) 1.0kg.

[0067] Put the components other than the glass fiber into the high-speed mixer according to the weight percentage, and stir for 1-5 minutes under the conditions of normal temperature and 120 r / min to prepare the premix; select the teeth with a length-diameter ratio of 40:1. Type co-rotating parallel twin-screw extruder, the temperature range of each zone is 245-305 ℃, the premix is ​​fed into the extruder through the main feed port of the...

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Abstract

The invention discloses a scratch-resistant polyamide composition and a preparation method thereof. The scratch-resistant polyamide composition is prepared from the following raw materials in percentage by mass: 40-80% of a polyamide resin, 10-40% of a glass fiber, 0.5-4% of organo-siloxane, 0.3-1.5% of polytetrafluoroethylene, 5-15% of a polyethylene-crylic acid ionomer, 0.2-1.0% of an antioxidant and 0.1-1.0% of a lubricant. The invention further discloses a preparation method of the scratch-resistant polyamide composition. The scratch-resistant polyamide composition disclosed by the invention is good in scraping resistance, mechanical property and coloring property, no conspicuous scratch marks are caused in five-finger scratch tests, and components and elements made of the composition are not easily scratched in long-term use.

Description

technical field [0001] The invention belongs to the field of polymer materials, and particularly relates to a scratch-resistant polyamide composition and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, is one of the earliest synthetically developed and relatively inexpensive engineering plastics. It has the characteristics of light weight, high mechanical strength and easy molding and processing. It also has excellent comprehensive properties such as low friction coefficient, oil resistance, self-lubrication and corrosion resistance performance, and has obtained good applications in many industries. The surface hardness and scratch resistance of polyamide resin are average, especially after moisture absorption, its scratch resistance will be greatly reduced, and fingernails can easily scratch the surface of the workpiece. [0003] By adding reinforcing materials, functional additives, etc., the comprehensive properties of poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L83/04C08L27/18C08L23/08C08K9/06C08K7/14C08K5/20C08K5/526
CPCC08L77/06C08K2201/003C08L2205/025C08L2205/035C08L83/04C08L27/18C08L23/0869C08K9/06C08K7/14C08K5/20C08K5/526
Inventor 易庆锋朱保成王灿耀于海鸥桑杰
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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