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Polycarbonate/polyester alloy composition resistant to long-term thermo-oxidative aging and preparation method thereof

A polycarbonate and polyester alloy technology, applied in the field of engineering plastics, can solve the problems of surface cracking, molecular chain reduction, material mechanical properties decline, etc., to improve long-term thermal and oxygen aging resistance, easy to mass production, preparation simple steps

Active Publication Date: 2021-11-19
KINGFA SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

[0003] However, polymer materials such as polycarbonate and polyester will age under the action of heat and oxygen during processing and use, that is, the performance of the material will deteriorate, such as yellowing, surface cracks, and molecular chain reduction. The mechanical properties of the material are reduced or even lost
In addition, the excessive transesterification reaction of polycarbonate and polyester at high temperature is also easy to generate polycarbonate-polyester random block copolymers, resulting in deterioration of its performance
At present, the long-term thermo-oxidative aging resistance of the polycarbonate / polyester alloy prepared in the prior art needs to be further improved

Method used

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  • Polycarbonate/polyester alloy composition resistant to long-term thermo-oxidative aging and preparation method thereof
  • Polycarbonate/polyester alloy composition resistant to long-term thermo-oxidative aging and preparation method thereof
  • Polycarbonate/polyester alloy composition resistant to long-term thermo-oxidative aging and preparation method thereof

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Experimental program
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Effect test

Embodiment 1～ Embodiment 17

[0059] The polycarbonate / polyester alloy compositions resistant to long-term thermal and oxidative aging of each embodiment were prepared by the following raw material formulations (see Table 1) and methods.

[0060] According to the raw material formula in Table 1, polycarbonate, polyester, acrylic-silicone rubber toughener, octadecylenate stabilizer, transesterification inhibitor, antioxidant and lubricant were stirred in a mixer Mix to obtain a premix; put the above premix into a twin-screw extruder, melt and mix in the twin-screw extruder, extrude and granulate, and obtain a polycarbonate / polyester alloy combination resistant to long-term thermal oxygen aging things. Among them, the screw aspect ratio of the twin-screw extruder is 40-45:1, the temperature of the screw barrel is 210-250° C., and the screw speed is 500-600 rpm.

[0061] Table 1 Embodiment 1~7 each component distribution ratio (by weight) and performance test result thereof

[0062]

[0063]

[0064] ...

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Abstract

The invention relates to the technical field of engineering plastics, in particular to a polycarbonate / polyester alloy composition resistant to long-term thermo-oxidative aging and a preparation method thereof. The polycarbonate / polyester alloy composition comprises the following components: polycarbonate, polyester, a flexibilizer, an octadecenoate stabilizer, a transesterification inhibitor and an antioxidant. By simultaneously adding the octadecenoate stabilizer and the transesterification inhibitor, the active molecular chain ends of polycarbonate and polyester can be passivated, the transesterification reaction of the polycarbonate / polyester alloy is inhibited, and the thermo-oxidative aging of the polycarbonate / polyester alloy is slowed down, so that the prepared polycarbonate / polyester alloy composition has good mechanical properties and obviously improved long-term thermo-oxidative aging resistance. According to the preparation method of the polycarbonate / polyester alloy composition resistant to long-term thermo-oxidative aging, the polycarbonate / polyester alloy composition is prepared through premixing and extrusion granulation, and the preparation method has the characteristics of being simple in preparation step, low in production cost and easy to produce on a large scale.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polycarbonate / polyester alloy composition resistant to long-term thermo-oxidative aging and a preparation method thereof. Background technique [0002] Polycarbonate / polyester alloy is a high-performance alloy material, which has the advantages of good toughness, high surface gloss, and good processing fluidity. In addition, the combination of polyester and polycarbonate can significantly improve the chemical resistance of polycarbonate, and can further expand its application fields, such as electronic appliances, kitchen and bathroom, audio-visual equipment, transportation and other fields. The rapid development of the industry has put forward higher requirements for materials, especially in terms of service safety and stability. In order to meet the technical changes in practical applications, polycarbonate / polyester alloys should have long-term thermal oxygen st...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L83/06C08K5/098C08K3/32
CPCC08L69/00C08K2003/324C08L2201/08C08L67/02C08L83/06C08K5/098C08K3/32
Inventor 杨志军陈平绪黄险波岑茵艾军伟丁超吴俊王培涛蒋刚军
Owner KINGFA SCI & TECH CO LTD
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