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PC/PBT alloy material as well as preparation method and application thereof

A technology of alloy materials and raw materials, applied in the field of PC/PBT alloy materials and their preparation, can solve the problems of large molding shrinkage rate of finished products, insufficient high temperature rigidity, low impact strength, etc., so as to overcome poor flow properties and make up for low impact resistance. , the effect of overcoming wear resistance

Active Publication Date: 2015-06-10
东莞市科罗威新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a fast crystallization rate, can be molded at high speed, has excellent solvent resistance, heat resistance, toughness and wear resistance, and low water absorption, and still maintains various good properties in a humid environment, and has good electrical insulation, but Large volume resistance and dielectric loss, large shrinkage rate of finished products, low notched impact strength, poor hydrolysis resistance, rapid crystallization at low temperature, insufficient rigidity at high temperature, etc.
In the current method, PC and PBT are blended and modified, and the properties of the prepared PC and PBT alloy materials are unstable.

Method used

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  • PC/PBT alloy material as well as preparation method and application thereof
  • PC/PBT alloy material as well as preparation method and application thereof
  • PC/PBT alloy material as well as preparation method and application thereof

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preparation example Construction

[0031] The preparation method of the PC / PBT alloy material of one embodiment, comprises the following steps:

[0032] According to the above-mentioned parts by mass, each component is raw material;

[0033] Premixing the PC, PBT, SEBS, toughening agent, compatibilizer, transesterification inhibitor, antioxidant and lubricant to obtain a premixture; and

[0034] The pre-mixture is extruded and granulated to obtain PC / PBT alloy material.

[0035] Further, the device used for extruding and granulating the pre-mixture is a twin-screw extruder, where the pre-mixture is melted and then extruded and granulated. The twin-screw extruder is divided into nine zones from zone 1 to zone 9 according to the feeding sequence. Zone 1 is the most advanced feeding area, and the die head is the last feeding area. The temperature settings of each section of the twin-screw extruder are as follows: zone one 205-215°C, zone two 235-245°C, zone three 235-245°C, zone four 235-245°C, zone five 225-235...

Embodiment 1

[0043] 70Kg of PC after dry pretreatment, 20Kg of PBT, 2Kg of SEBS, 6Kg of polysiloxane-methyl methacrylate copolymer, 0.5Kg of SBS-MAH, 0.8Kg of sodium dihydrogen phosphate, 0.1 Kg of 2,6-tertiary butyl-4-methylphenol and 0.1 Kg of silicone powder were added into a high-speed mixer for pre-mixing to obtain a pre-mixture. Put the mixed pre-mixture in a twin-screw extruder to melt, extrude and granulate. The temperature settings of each section of the twin-screw extruder are: 215°C for the first zone, 235°C for the second zone, and 245°C for the third zone. The fourth zone is 245°C, the fifth zone is 235°C, the sixth zone is 235°C, the seventh zone is 235°C, the eighth zone is 225°C, the ninth zone is 235°C, and the machine head is 235°C to obtain PC / PBT alloy materials.

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Abstract

The invention discloses a PC / PBT alloy material as well as a preparation method and application thereof. The PC / PBT alloy material comprises the following components in parts by mass: 50-70 parts of PC (polycarbonate), 20-30 parts of PBT (polybutylene terephthalate), 2-6 parts of SEBS (styrene-ethylene / butylene-styrene block polymer), 5-15 parts of toughening agent, 0.5-2 parts of compatilizer, 0.8-2 parts of ester exchange inhibitor, 0.1-1 part of antioxidant and 0.1-1 part of lubricant, wherein the toughening agent is polysiloxane-methyl methacrylate copolymer, the compatibilizer is SBS-MAH (styrene butadiene styrene-maleic anhydride), the ester exchange inhibitor is phosphate type ester exchange inhibitor, the antioxidant is hindered phenol antioxidant or phosphite antioxidant, and the lubricant is silicone powder. The PC / PBT alloy material has stable performance. Moreover, the invention further provids a preparation method and application of the PC / PBT alloy material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PC / PBT alloy material and its preparation method and application. Background technique [0002] Polycarbonate (PC) is a linear almost colorless glassy amorphous polymer, which has the advantages of good impact strength, excellent electrical insulation performance, wide service temperature range and good dimensional stability of products, but PC molecules contain A large number of benzene rings, molecular rigidity and steric hindrance are large, so its melting temperature is high, the fluidity during processing is poor, the product is prone to stress cracking, the residual stress is large, the wear resistance is poor, and it is sensitive to the gap. It is limited in production applications. [0003] Polybutylene terephthalate (PBT) is an engineering material with excellent comprehensive properties, which has very good chemical stability, mechanical strength, electrica...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L53/02C08L51/00C08L51/08C08L83/04B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08K2201/011C08L69/00C08L2205/02C08L2205/035C08L2205/08C08L2207/53C08L67/02C08L53/025C08L83/04C08L51/006C08L51/085C08K2003/324C08K5/13C08K5/526C08K5/523C08K5/521
Inventor 向玄玲黄坚国曾东华韩艳梅李金香郭浩潘朝安胜高邓新松江细红
Owner 东莞市科罗威新型材料有限公司
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