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Impact-resistant scratch-resistant thermal-conduction nylon composite material and preparation method thereof

A nylon composite material and composite material technology are applied in the field of impact-resistant and scratch-resistant thermally conductive nylon composite materials and their preparation, and can solve the problems of poor scratch resistance, poor toughness and low temperature resistance, and poor toughness of thermally conductive composite materials.

Active Publication Date: 2017-07-25
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN104788951A discloses a composite material with high thermal conductivity for LEDs, which uses conventional nylon as a matrix, blends with thermally conductive fillers and flame retardants, and is extruded and granulated by a twin-screw extruder. The prepared thermally conductive composite material is also There are problems such as poor toughness and poor scratch resistance
[0007] In the above-mentioned prior art, due to the high surface hardness and large filling amount of the inorganic thermally conductive filler, and the compatibility between the filler itself and the resin is not ideal, resulting in poor toughness and low temperature resistance of this type of composite material, high surface hardness, Poor scratch resistance and other issues

Method used

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  • Impact-resistant scratch-resistant thermal-conduction nylon composite material and preparation method thereof
  • Impact-resistant scratch-resistant thermal-conduction nylon composite material and preparation method thereof
  • Impact-resistant scratch-resistant thermal-conduction nylon composite material and preparation method thereof

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preparation example Construction

[0051] The preparation method (i.e. "two-step melt blending method") of the composite material involved in the first aspect of the present invention related to the second aspect of the present invention includes:

[0052] Step A, uniformly mixing the thermally conductive component, coupling agent and optional anti-scratch agent to prepare a pretreatment;

[0053] Step B, uniformly mixing the pretreated material with the nylon resin to obtain a mixture I;

[0054] Step C, using a melt blending method, melt-extruding and granulating the mixture I through a twin-screw extruder to obtain a masterbatch;

[0055] Step D, uniformly mixing the masterbatch with a flame retardant and an antioxidant to obtain a mixture II;

[0056] In step E, the mixture II is melt-extruded and granulated by a twin-screw extruder by a melt-blending method to obtain an impact-resistant, scratch-resistant, and heat-conducting nylon composite material.

[0057] In the preparation method of the above-menti...

Embodiment 1

[0087] Example 1: Preparation of thermally conductive nylon composite material by two-step melt blending method

[0088] (1) Add 1200g of spherical alumina and 9g of KH550 into a heatable homogenizer, adjust the temperature of the homogenizer to 60°C, and mix at a high speed for 3 minutes to obtain a pretreated product;

[0089] (2) Add 1500g copolymerized nylon (relative viscosity is 2.8, number average molecular weight is 15000, molecular weight distribution index is 1.8, and the molar ratio of nylon 6 structural unit and nylon 66 structural unit in the copolymerized nylon is 4:1) in the pretreatment product The resin was uniformly mixed at high speed for 3 minutes to obtain mixture I;

[0090] (3) The mixture I is melt-extruded and granulated through a twin-screw extruder to obtain a heat-conducting, scratch-resistant masterbatch; the process conditions of the twin-screw extruder are: temperature in the first zone: 220°C; temperature in the second zone: 240°C; the temperat...

Embodiment 2

[0094] Example 2: Preparation of thermally conductive nylon composite material by two-step melt blending method

[0095] (1) Add 300g of boron nitride, 900g of spherical alumina and 9g of KH550 into a heatable homogenizer, adjust the temperature of the homogenizer to 60°C, and mix at a high speed for 3 minutes to obtain a pretreated product;

[0096] (2) Add 1500g copolymerized nylon (relative viscosity is 3.2, number average molecular weight is 18000, molecular weight distribution index is 2.2, and the molar ratio of nylon 6 structural unit and nylon 66 structural unit in the copolymerized nylon is 4:1) in the pretreatment product The resin was uniformly mixed at high speed for 3 minutes to obtain mixture I;

[0097] (3) The mixture I is melt-extruded and granulated through a twin-screw extruder to obtain a heat-conducting, scratch-resistant masterbatch; the process conditions of the twin-screw extruder are: temperature in the first zone: 220°C; temperature in the second zone...

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Abstract

The present invention relates to an impact-resistant scratch-resistant thermal-conduction nylon composite material and a preparation method thereof, wherein a nylon composition containing copolymerized nylon is adopted as a resin matrix, and the impact-resistant scratch-resistant thermal-conduction nylon composite material is prepared from the nylon composition, a thermal conduction component, a flame retardant agent, an antioxidant, a coupling agent and an optional scratch-resistant agent through a two-step melt blending method. According to the present invention, the impact-resistant scratch-resistant thermal-conduction nylon composite material has advantages of good toughness, good low temperature impact resistance, low surface hardness, excellent scratch resistance, good thermal conduction performance, good mechanical property and good flame-retardant property, and can be widely used in electric tool shells, battery pack shells, LED heat dissipators, vehicle LED brackets, and other plastic part fields having high heat dissipating requirements.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an impact-resistant, scratch-resistant, heat-conducting nylon composite material and a preparation method thereof. Background technique [0002] With the development of light weight and miniaturization of electronic equipment, the density of electronic assembly has increased rapidly, which requires that the heat generated by components during work must be dissipated and conducted in time, otherwise it will affect the energy efficiency of the system and the service life of the product. Therefore, thermally conductive composite materials have become a new development direction. [0003] At present, the main method of preparing thermally conductive composite materials is to fill the polymer matrix with high thermally conductive components. Through the interaction between the thermally conductive fillers, a chain-like or network-like distribution form is formed ...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08K13/06C08K9/06C08K7/08C08K3/32C08K3/22C08K3/38C08K3/16B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K3/16C08K3/22C08K3/32C08K3/38C08K7/08C08K9/06C08K13/06C08K2003/162C08K2003/2224C08K2003/323C08K2003/385C08L2201/02C08L2201/08C08L2201/22C08L77/00
Inventor 左景奇甘典松杨克俭邓程方王雄刚黄安民王文志
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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