Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic

A technology of polycarbonate and engineering plastics, which is applied in the field of high-temperature-resistant engineering plastics manufacturing, and can solve the problems of poor heat resistance of materials, low temperature resistance of ordinary rubber or elastomer, compatibility of polycarbonate and composite matrix And other issues

Inactive Publication Date: 2011-10-05
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0002] For the general polycarbonate and elastomer composite toughening system, although the comprehensive mechanical properties of the composite have been greatly improved, there are still compatibility problems between the polycarbonate and the composite matrix, and because ordinary rubber or elastomer is not resistant to High temperature, so the heat resistance of the material is not good

Method used

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  • Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic
  • Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic
  • Production method of nylon 66/ polycarbonate/ silicon rubber thermostability engineering plastic

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Embodiment 2-5

[0033] Both nylon 6 and polycarbonate were dried under vacuum at 90°C for 14 hours, and the montmorillonite was dried in an air-circulating oven at 80°C for 4 hours before mixing. Nylon 6 / polycarbonate / silicone rubber compound is dynamically vulcanized in a co-rotating twin-screw extruder. The barrel temperature is between 270-285°C, and the rotation speed is between 60-90rpm. Cool in a water bath after extrusion and start granulation. The formulation of the nylon 66 / polycarbonate / silicone rubber compound is shown in Table 1.

[0034] Subsequent injection molding was carried out in a plastic injection molding machine at an injection temperature of 275°C. Injection speed and pressure are 11.5cm 3 / s and 2300bar. Gained composite toughened nylon 66 engineering plastics carries out performance test, and the results are shown in Table 2, figure 2 and image 3 .

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Abstract

The invention discloses a production method of nylon 66 / polycarbonate / silicon rubber thermostability engineering plastic, comprising the following steps: 1) drying nylon 66 and polycarbonate in a high-performance vacuum dehumidification drier at the temperature of 90 DEG C for 12 hours; and evenly mixing according to the mass ratio that: PA66: PC: silicon rubber: montmorillonoid (OMMT) is equalto 100: (5-10): (1-5): (0-1); and (2) fusing and extruding the mixture by a screw extruder for granulation. The fusion processing temperature is 265-300 DEG C, the rotating speed of the screw is 50-100 r / min, and the retention period of mixture in a double-screw extruder is 120-400 seconds. Compared with the prior art, the invention obtains the engineering plastic with favorable mechanical property and resistance to high temperature.

Description

technical field [0001] The invention relates to a manufacturing method of high-temperature-resistant engineering plastics, in particular to a manufacturing method of nylon 66 / polycarbonate / silicone rubber high-temperature-resistant engineering plastics. technical background [0002] For the general polycarbonate and elastomer composite toughening system, although the comprehensive mechanical properties of the composite have been greatly improved, there are still compatibility problems between the polycarbonate and the composite matrix, and because ordinary rubber or elastomer is not resistant to High temperature, so the heat resistance of the material is not good. [0003] Silicone rubber provides ideas for solving the above problems due to the following properties: wide operating temperature (-100°C to +250°C); resistance to oxygen, ozone and light; good non-stickiness; low toxicity; light transmission; good Electrically insulating; low chemical activity. Invention conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L69/00C08L83/04C08L83/07C08K3/34C08K9/04
Inventor 陈军吴唯优异王茹刘明昌
Owner EAST CHINA UNIV OF SCI & TECH
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