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Whisker reinforced thermally conductive plastic material and preparation method thereof

A technology of thermally conductive plastics and thermally conductive insulating fillers, applied in the field of polymer materials, can solve problems such as poor mechanical properties and low thermal conductivity, and achieve the effects of improving mechanical properties, improving thermal conductivity, and improving filler aggregation.

Inactive Publication Date: 2015-04-29
HUIZHOU KINGBALI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to address the deficiencies of the above-mentioned prior art, and provide a whisker-reinforced thermally conductive plastic and a preparation method thereof. Made of additives, the crystallization rate of polycaprolactam can be changed through pre-mixing, extrusion, cooling, air-drying, pelletizing and other processes to improve its thermal conductivity and improve its mechanical properties at the same time, solving the problem of thermal conductivity of existing heat-conducting plastics Problems with low and poor mechanical properties

Method used

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  • Whisker reinforced thermally conductive plastic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 According to the formula in Table 1, 5 different formula products (1#~5# in Table 1) were produced, and compared with the products produced by the formula (6#) without adding inorganic whiskers.

[0029] Table 1 Product formula table (unit: parts by weight)

[0030]

[0031] In the formula, the specific ingredients used are as follows:

[0032] (1) PA6 resin: translucent or opaque milky white granular polycaprolactam (PA6) with a relative viscosity of 2.8;

[0033] (2) Thermally conductive insulating material: aluminum nitride, boron nitride and aluminum oxide are compounded at a mass ratio of 1:1:3;

[0034] (3) Inorganic whiskers: calcium sulfate whiskers with an aspect ratio of 60-80;

[0035] (4) The coupling agent is: 3-glycidyl etheroxypropyl trimethoxysilane;

[0036] (5) The antioxidant is: the main antioxidant 1076 and the auxiliary antioxidant 168 are compounded according to the mass ratio of 3:1;

[0037] (6) Other additives are: 1:1 comp...

Embodiment 2

[0050] Example 2 The whisker-reinforced thermally conductive plastic of the present invention is prepared by the following method:

[0051] 1. Product formula: 30 parts of PA6 resin (relative viscosity 2.8, translucent milky white particles), 20 parts of thermally conductive insulating filler (combined with talcum powder and carbon nanotubes at a ratio of 3:2), inorganic whiskers (length-to-diameter ratio 60~80 calcium sulfate whisker and silicon carbide compounded at 4:1) 10 parts, coupling agent (aluminate coupling agent) 0.5 part, antioxidant (antioxidant 3114) 0.5 part, processing aid agent (antistatic agent, anti-dripping agent, lubricant compounded according to 1:2:1) 5 parts;

[0052] 2. Preparation steps:

[0053] (1) Surface treatment of thermally conductive insulating fillers and inorganic whiskers with coupling agents: Dilute aluminate coupling agents with anhydrous solvents and atomize, then pass thermally conductive insulating fillers and inorganic whiskers into ...

Embodiment 3

[0060] Example 3 The whisker-reinforced thermally conductive plastic described in the present invention is prepared by the following method:

[0061] 1. Product formula: 50 parts of PA6 resin (relative viscosity 2.8, opaque milky white particles), 30 parts of thermally conductive insulating filler (talcum powder, alumina, silicon oxide compounded at 1:1:1), inorganic whiskers (sulfuric acid Calcium, calcium carbonate, silicon carbide compounded according to 2:3:2) 20 parts, coupling agent (titanate coupling agent) 2 parts, antioxidant (antioxidant 1098) 1 part, processing aid ( Flame retardant) 10 parts;

[0062] 2. Preparation steps:

[0063] (1) Surface treatment of thermally conductive insulating fillers and inorganic whiskers with coupling agents: first dilute the aluminate coupling agent into a liquid with an anhydrous solvent, and then atomize the thermally conductive insulating fillers and inorganic whiskers Pass it into the atomization chamber, make the thermally con...

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Abstract

The invention discloses a whisker reinforced thermally conductive plastic. The whisker reinforced thermally conductive plastic is prepared from the following components including polycaprolactam, inorganic whiskers, a thermal conductive insulating filler, a coupling agent and other processing aids. According to the whisker reinforced thermally conductive plastic disclosed by the invention, with combination of processes of premixing, extrusion, cooling, air drying, granulating and the like, based on the characteristics of high mechanical strength, good toughness and the like of polycaprolactam resin, by changing the crystallization rate of the polycaprolactam, the mechanical property of the polycaprolactam is improved and enhanced while the thermal conductivity of the polycaprolactam is improved, and the problems of low thermal conductivity and poor mechanical property of the traditional thermally conductive plastic are solved. The whisker reinforced thermally conductive plastic can be widely applied to the field of LED lamps.

Description

technical field [0001] The invention relates to a material and a preparation method thereof, in particular to a whisker-reinforced heat-conducting plastic material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polycaprolactam (PA6) is an engineering plastic with high mechanical strength, good toughness, oil resistance, weak acid and alkali resistance, etc. It is widely used in the field of automobile parts manufacturing. The amide group of PA6 is a polar group, and hydrogen bonds are easily formed between nylon molecular chains, resulting in poor dimensional stability and strong hygroscopicity of the product, which limits its application. At the same time, the thermal conductivity of PA6 is low, only 0.23w / m.k, which is not suitable for the use environment with strict heat dissipation requirements. [0003] Researchers at home and abroad have carried out a lot of research and development and modificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K13/06C08K9/06C08K3/28C08K3/38C08K3/22C08K7/08C08K5/134C08K5/526B29C47/92B29C48/92
CPCC08K13/06B29C48/92B29C2948/9259B29C2948/92704C08J5/06C08K3/04C08K3/22C08K3/28C08K3/34C08K3/38C08K5/1345C08K5/526C08K7/08C08K7/10C08K7/24C08K9/04C08K9/06C08K2003/2206C08K2003/2227C08K2003/282C08K2003/385C08K2201/016C08L77/02
Inventor 杨永佳张彦兵杨小义
Owner HUIZHOU KINGBALI TECH
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