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PC/PA composite material with relatively high light transmittance and preparation method thereof

A composite material and light transmittance technology, applied in the field of polymer materials, can solve the problems of limited application, no large-scale industrial production, and high price of block copolymerized PC, and achieve the effect of good transparency

Pending Publication Date: 2021-12-21
SHANDONG DONGCHEN ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PC is thermodynamically incompatible with traditional aliphatic PA. In order to obtain an alloy with excellent performance, it is necessary to add a compatibilizer to improve the compatibility of the two. At present, commercialized PC / PA alloys are made of Adding compatibilizer for production, the product is completely opaque, which limits its application in industrial windows and other aspects with transparency requirements
CN101365753A patent proposes that transparent PA / PC alloy can be prepared by blending polyamide and block copolymerized PC, but block copolymerized PC is expensive and there is no large-scale industrial production in China, which limits the application of transparent PC / PA composite materials

Method used

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  • PC/PA composite material with relatively high light transmittance and preparation method thereof
  • PC/PA composite material with relatively high light transmittance and preparation method thereof
  • PC/PA composite material with relatively high light transmittance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Preparation of PC / PA composite material A with higher light transmittance

[0023] Raw materials: 95 parts of PC resin, 5 parts of PA10I resin, 0.2 part of antioxidant, and 0.2 part of lubricant.

[0024] 1. Weigh 47.5 kg of PC resin, 2.5 kg of dried PA10I resin, 0.1 kg of antioxidant, and 0.1 kg of lubricant, add them to the high-speed mixer, mix at low speed for 1 minute, then mix at high speed for 2 minutes, and release the material;

[0025] 2. Feed the mixed material into the twin-screw extruder, and after the material comes out of the die of the extruder, it is dragged, cooled, dried, and pelletized to obtain the PC / PA composite material.

[0026] The temperature of each zone of the twin-screw extruder is set as follows: the temperature in the first zone is 180-185°C, the temperature in the second zone is 200-255°C, the temperature in the third zone is 255-260°C, the temperature in the fourth zone is 255-260°C, and the temperature in the fifth zone is 2...

experiment example 1

[0027] Experimental example 1: PC / PA composite material A product performance test with high light transmittance

[0028] After drying the PC / PA composite material A prepared in Example 1, use an injection molding machine to make various standard specimens, and place it for 24 hours for testing; injection molding machine temperature: 265°C, 265°C, 270°C; injection speed 68g / s, injection molding The time is 12s, the injection pressure is 43MPa, the holding pressure is 36MPa, and the holding time is 30s.

[0029] Table 1 Test results of PC / PA composites

[0030]

[0031] Note: PC / PA66 test data comes from CN103937194A Example 4

Embodiment 2

[0032] Embodiment two: the preparation of PC / PA composite material B with higher light transmittance

[0033] Raw materials: 90 parts of PC resin, 10 parts of PA10I resin, 0.4 part of antioxidant, and 0.4 part of lubricant.

[0034] 1. Weigh 45 kg of PC resin, 5 kg of dried PA10I resin, 0.2 kg of antioxidant, and 0.2 kg of lubricant, add them to the high-speed mixer, mix at low speed for 1 minute, then mix at high speed for 2 minutes, and release the materials;

[0035] 2. Feed the mixed material into the twin-screw extruder, and after the material comes out of the die of the extruder, it is dragged, cooled, dried, and pelletized to obtain the PC / PA composite material.

[0036] The temperature of each zone of the twin-screw extruder is set as follows: the temperature in the first zone is 180-185°C, the temperature in the second zone is 200-255°C, the temperature in the third zone is 255-260°C, the temperature in the fourth zone is 255-260°C, and the temperature in the fifth zo...

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Abstract

The invention discloses a PC / PA composite material with relatively high light transmittance and a preparation method thereof. The composite material takes PC, PA10I and a copolymer thereof as main raw materials, a proper amount of an antioxidant and a lubricant are added, and compared with the existing PC / PA, the prepared product has the advantages that the tensile strength, bending strength, processing fluidity, heat resistance and other properties are basically equivalent; however, the product prepared by the method is good in transparency, and can be used for preparing products with transparent requirements.

Description

technical field [0001] The invention relates to a PC / PA composite material with relatively high light transmittance and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polycarbonate (PC) has the advantages of excellent mechanical properties, heat resistance, low water absorption, dimensional stability, and high light transmittance, but pure PC resin has poor processing fluidity, poor solvent resistance, and is prone to stress cracking. Sensitive, which greatly limits its application. Nylon (PA) has the advantages of wear resistance, self-lubrication, easy processing, solvent resistance, and high mechanical strength. Therefore, PC and PA have good complementarity in terms of material properties, and the advantages of both can be combined to expand the application field. The ideal PC / PA alloy combines the advantages of PC and PA resin. On the one hand, the alloy can improve the rigidity and chemical resistance of PC ma...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L77/06
CPCC08L69/00C08L2201/10C08L77/06
Inventor 田国锋毕燕王朝进刘建伟孙即威
Owner SHANDONG DONGCHEN ENG PLASTIC
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