A kind of high temperature resistant, thermally conductive nylon composite material and preparation method thereof

A nylon composite material and composite material technology are used in the field of high temperature resistant, thermally conductive nylon composite materials and their preparation, which can solve the problems of high brittleness, stress cracking, and high processing requirements, and achieve improved toughness, enhanced bridging ability, and improved mechanical properties. Effect

Active Publication Date: 2018-12-18
上海日之升科技有限公司
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Problems solved by technology

Chinese patent CN2013104674047 discloses a heat-conducting and high-temperature-resistant nylon composite material and its preparation method. The composite material is made of the following components by weight: 100 parts by weight of high-temperature nylon, 5-30 parts by weight of carbon fiber, and 20-50 parts by weight of thermally conductive filler. parts by weight, 0.2-1 parts by weight of coupling agent, 0.3-0.8 parts by weight of antioxidant, 0.5-1.5 parts by weight of lubricant, and 0.1-0.8 parts of crystallization nucleating agent; it uses high melting point PA as the matrix resin, and adds carbon fiber and inorganic The filler is used to prepare heat-conducting and high-temperature-resistant nylon composite materials. This type of material has high processing requirements and is prone to stress cracking due to its high brittleness.
Chinese patent 2016102122801 discloses a heat-conducting and high-temperature resistant nylon composite material, which is made of the following components by weight: 100 parts of high-temperature nylon, 5-15 parts of expanded graphite, 1-5 parts of finely ground graphite powder, and 0.2- 1 part, 0.3-0.8 parts of antioxidant, 0.5-1.5 parts of lubricant; the material is added with inorganic fillers to prepare heat-conducting and high-temperature-resistant nylon composite materials, which require high processing requirements and are prone to stress cracking problems due to high brittleness

Method used

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  • A kind of high temperature resistant, thermally conductive nylon composite material and preparation method thereof
  • A kind of high temperature resistant, thermally conductive nylon composite material and preparation method thereof
  • A kind of high temperature resistant, thermally conductive nylon composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Example 1 Preparation of high temperature resistant and thermally conductive nylon composite material (1)

[0033] (1) Dry the nylon at 110°C for 4 hours.

[0034] (2) Weigh the raw materials: 100 parts of PA66, 40 parts of PA9T, 10 parts of PA1212 elastomer, 20 parts of alumina, 0.2 part of reactive flow modifier, 0.3 part of antioxidant and 0.3 part of lubricant, premixed uniformly; The PA66 is a homopolymer PA66 with a relative molecular weight of 15000-20000; the reactive flow modifier is Sanstab 2303; the antioxidant is a hindered phenol antioxidant; the lubricant is silicone powder.

[0035] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 10 parts of carbon fiber from the glass fiber feed port, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion granulation. The material is extruded and cut into pellets under cold water; the diameter of the carbon fiber is 7-20 μm.

[0036] (4) Dry the cut particles, inj...

Embodiment 2

[0037] Example 2 Preparation of high temperature resistant and thermally conductive nylon composite material (2)

[0038] (1) Dry the nylon at 110°C for 4 hours.

[0039] (2) Weigh 100 parts of PA66, 80 parts of PA12T, 50 parts of PA1212 elastomer, 50 parts of aluminum nitride, 1.5 parts of reactive flow modifier, 1.2 parts of antioxidants, and 2.0 parts of lubricants, and premix them evenly; the PA66 It is homopolymer PA66 with a relative molecular weight of 15000-20000; the reactive flow modifier is Sanstab 2303; the antioxidant is a phosphite antioxidant; and the lubricant is Montan wax.

[0040] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 30 parts of carbon fiber from the glass fiber feed port, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion granulation. The material is extruded and cut into pellets under cold water; the diameter of the carbon fiber is 7-20 μm.

[0041] (4) Dry the cut particles and injec...

Embodiment 3

[0042] Example 3 Preparation of high temperature resistant and thermally conductive nylon composite material (3)

[0043] (1) Dry the nylon at 110°C for 4 hours.

[0044] (2) Weigh 100 parts of PA66, 60 parts of PA10T, 30 parts of PA1212 elastomer, 30 parts of boron nitride, 1.0 part of reactive flow modifier, 0.8 part of antioxidant, and 1.2 part of lubricant, and premix it evenly; the PA66 It is homopolymer PA66 with a relative molecular weight of 15000-20000; the reactive flow modifier is Sanstab 2303; the antioxidant is a sulfur-containing antioxidant; and the lubricant is a polyester wax.

[0045] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 20 parts of glass fiber from the barrel of the fourth section of the twin-screw extruder, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion granulation , The material is extruded and cut into pellets under cold water; the diameter of the carbon fiber is 7-20 μm.

[0046...

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Abstract

The invention relates to a high-temperature-resistant and heat-conductive nylon composite material and a preparation method thereof. The high-temperature-resistant and heat-conductive nylon composite comprises the following components in parts by weight: 100 parts of PA66, 40-80 parts of high temperature-resistant nylon, 10-50 parts of a nylon elastomer, 10-30 parts of carbon fibers, 20-50 parts of a heat-conductive filler, 0.2-1.5 parts of a reactive flow modifier, 0.3-1.2 parts of an antioxidant and 0.3-2 parts of a lubricating agent. The preparation method comprises the following steps: uniformly pre-mixing the PA66, the high-temperature-resistant nylon, the nylon elastomer, the heat-conductive filler, the reactive flow modifier, the antioxidant and the lubricating agent, adding from a main feeding port of a double-screw extruder, adding the carbon fibers from a glass fiber mouth, controlling the rotating speed to be 800-1200 revolutions / min and the temperature to be 250-285 DEG C and performing extrusion granulation to obtain the high-temperature-resistant and heat-conductive nylon composite material. The material has excellent high temperature resistance and heat conduction and simultaneously has the characteristics of being good in mechanical property and easy to process.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-temperature resistant, thermally conductive nylon composite material and a preparation method thereof. Background technique [0002] LED lighting technology meets people's needs for energy saving and emission reduction, and has therefore been widely used in the global lighting industry in recent years. However, existing LED products often have the problem of higher operating temperature and shorter product life, which places high requirements on the overall heat dissipation capacity of the product. It is particularly important to choose a thermal interface material with good thermal conductivity and high temperature resistance. Nylon is one of the five major engineering plastics. It has excellent mechanical properties, wear resistance, thermal stability and fatigue resistance. It is widely used in automobiles, electrical appliances, mechanical parts and other fields....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K13/04C08K7/06C08K3/22C08K3/28C08K3/38
CPCC08L77/06C08L2201/08C08L2205/025C08L2205/035C08K7/06C08K2003/2227C08K2003/282C08K2003/385
Inventor 周军杰张强陈光伟王锡军孟成铭杨涛陈晓东
Owner 上海日之升科技有限公司
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