High heat-resistant heat-conductive polyester composite material and preparation method thereof

A polyester composite material, high heat resistance technology, applied in the field of polyester resin, can solve the problems affecting material processing performance, mechanical properties and thermal conductivity, low thermal deformation temperature, etc., to improve processing performance, mechanical properties, comprehensive performance Excellent, the effect of increasing the heat distortion temperature

Active Publication Date: 2019-11-15
FOSHAN SANSHUI JINGE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the coupling agent can improve the compatibility between the thermally conductive powder and the polyester matrix, because it is mostly small molecules, it is easy to precipitate when the polyester is melted and extruded, thus affecting the processing performance, mechanical properties and thermal conductivity of the material.
[0005] The invention patent with the publication number CN1473883A discloses a method for organic modification of inorganic oxide powders. The method of in-situ soap-free emulsion polymerization on the particle surface is used to modify the surface of inorganic oxide powders, which can improve the inorganic oxide powders. The dispersion of powder in non-polar organic medium avoids the precipitation of small molecule coupling agent during thermal processing, thereby improving the thermal processing performance of composite materials. However, because the glass transition temperature of these polymers is not high, so The prepared composite still has the problem of low heat distortion temperature

Method used

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  • High heat-resistant heat-conductive polyester composite material and preparation method thereof
  • High heat-resistant heat-conductive polyester composite material and preparation method thereof
  • High heat-resistant heat-conductive polyester composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix and stir 100 parts of deionized water, 100 parts of magnesium oxide powder with a particle size of 40 μm, 1 part of stearic acid, 10 parts of monomer I and 0.5 part of potassium persulfate in parts by mass, and heat to 70 ° C to make the The monomer is polymerized on the surface of magnesium oxide for 3-4 hours, filtered, heat-preserved and dried to obtain the heat-conducting powder; according to the following formula, each raw material is added to a high-speed mixer, and mixed at 60-80°C for 5-30 minutes; the above-mentioned materials It is fed into the twin-screw extruder from the hopper, melted and extruded, and granulated. The temperature of each zone of the extruder is set as follows: T1=190°C, T2=205°C, T3=210°C, T4=210°C, T5= 220 ° C, T6 = 225 ° C, T7 = 225 ° C, T8 = 235 ° C, T9 = 235 ° C, T mold = 220 ° C, the obtained pellets were placed in a blast dryer at 100 ° C for 4 hours, and passed through the injection molding mechanism The test samples were prepare...

Embodiment 2

[0032] By mass parts, the mixture of 200 parts of deionized water, 100 parts of magnesium oxide powder with a particle size of 1 μm, 3 parts of sodium stearate, 20 parts of monomer I and monomer II (the mass ratio of monomer I and monomer II is 6:4) and 0.8 parts of ammonium persulfate were mixed and stirred evenly, heated to 75° C., polymerized the monomer on the surface of magnesium oxide for 4 hours, filtered, heat-preserved and dried to obtain the heat-conducting powder.

[0033] The polyester composite material is prepared according to the following formula, and its process is the same as that of Example 1, and the test data are shown in Table 1.

[0034]

Embodiment 3

[0036]Mix 300 parts of deionized water, 100 parts of magnesium oxide powder with a particle size of 5 μm, 5 parts of sodium dodecylsulfonate, 30 parts of monomer I, monomer II, and monomer III in parts by mass (monomer I , monomer II, monomer III (mass ratio is 6:3:1) and 1 part of sodium persulfate are mixed and stirred evenly, heated to 80°C, polymerized on the surface of magnesium oxide for 4 hours, filtered, heat-preserved and dried to obtain The thermally conductive powder.

[0037] The polyester composite material is prepared according to the following formula, and its process is the same as that of Example 1, and the test data are shown in Table 1.

[0038]

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Abstract

The invention discloses a high heat-resistant heat-conductive polyester composite material and a preparation method thereof. The material is composed of the following components, in parts by mass: 49.6-89.6 parts of polyester, 10-50 parts of a heat-conductive filler, 0.2-0.5 part of an antioxidant, and 0.2-0.5 part of an anti-hydrolysis agent. According to the composite material provided by the invention, the heat-conductive filler in the composite material is obtained by initiating in-situ polymerization of a triazine acrylate monomer at the surface of magnesium oxide by a radical initiator,and the filler can give thermal conductivity to the polyester composite material and improve the heat resistance and processing stability of the composite material; and the composite material can broaden an application field of polyester materials.

Description

technical field [0001] The invention belongs to the technical field of polyester resin, and in particular relates to a high heat-resistant and thermally conductive polyester composite material and a preparation method thereof. Background technique [0002] Polyester is a general term for a class of compounds obtained by polycondensation of polybasic acids and polyols, usually including polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyarylate Wait. Polyester plastics have good mechanical properties, heat resistance, moisture and water resistance, and air tightness, and are widely used in textiles, packaging, electronic appliances, and construction. However, polyester plastic itself has poor thermal conductivity, which limits its range of applications. [0003] At present, the method commonly used to improve the thermal conductivity of polyester materials is to add thermally conductive powder, which usually includes aluminum oxide, magnesium oxide, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L79/00C08K9/10C08K3/22C08F126/06C08F226/06B29C48/92
CPCB29C48/92B29C2948/92704C08F126/06C08F226/06C08K2003/222C08L67/02C08L2201/08C08L79/00C08K9/10C08K3/22
Inventor 卢秋影姜宏伟
Owner FOSHAN SANSHUI JINGE NEW MATERIALS CO LTD
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