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PBT/PC alloy with stable mechanical property and preparation method and product ofPBT/PC alloy

A technology of alloy and performance, applied in the field of engineering plastics, can solve problems such as poor mechanical properties, achieve the effects of reducing degradation, improving the retention rate of mechanical properties, and improving the stability of mechanical properties

Active Publication Date: 2021-11-16
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a PBT / PC alloy with stable mechanical properties in order to overcome the defects of poor mechanical properties after multiple injection moldings described in the above-mentioned prior art. The retention rate of mechanical properties after three injections is ≥90%

Method used

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  • PBT/PC alloy with stable mechanical property and preparation method and product ofPBT/PC alloy
  • PBT/PC alloy with stable mechanical property and preparation method and product ofPBT/PC alloy
  • PBT/PC alloy with stable mechanical property and preparation method and product ofPBT/PC alloy

Examples

Experimental program
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Embodiment 1～19

[0066] The content of each component in the PBT / PC alloys of Examples 1-19 is shown in Table 1.

[0067] Its preparation method is: coupling agent N-(β-aminoethyl)-γ-aminopropyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, isopropyl bis(methyl Acryloyl) isostearyl titanate is blended according to the weight ratio of 2:1:3, the glass fiber is carried out coupling treatment, obtains the glass fiber through coupling treatment;

[0068] Mix epoxy resin, antioxidant, toughening agent and TMAIC according to Table 1 to obtain a premix; mix PBT, PC, glass fiber with coupling treatment or glass fiber without coupling treatment with the premix Afterwards, it is added into a twin-screw extruder, melted, extruded and granulated to obtain a PBT / PC alloy.

[0069] The temperature of the first zone from the feed port to the head of the twin-screw extruder is 200-230°C, the temperature of the second zone is 240-260°C, the temperature of the third zone is 235-255°C, the temperatur...

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Abstract

The invention discloses PBT / PC alloy with stable mechanical property and a preparation method of the PBT / PC alloy. The PBT / PC alloy is prepared from the following components in parts by weight: 50 to 80 parts of PBT / PC mixture, 10 to 40 parts of glass fiber, 2 to 5 parts of epoxy resin, 0.1 to 0.3 part of antioxidant, 4 to 8 parts of flexibilizer and 2 to 4 parts of trimethylallyl isocyanate; the weight ratio of PBT to PC in the PBT / PC mixture is (2-6): 1, and the flexibilizer is an organic silicon-acrylate core-shell structure flexibilizer. Through the synergistic effect of the trimethylallyl isocyanate, the flexibilizer agent with the core-shell structure and the epoxy resin, the mechanical property retention rate of the PBT / PC alloy after multiple times of injection molding is effectively improved. The mechanical property retention rate of the PBT / PC alloy is larger than or equal to 95% after secondary injection molding, the mechanical property retention rate of the PBT / PC alloy is larger than or equal to 90% after three-time injection molding, and the PBT / PC alloy can be used for multiple times of cyclic injection molding.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a PBT / PC alloy with stable mechanical properties, a preparation method and a product thereof. Background technique [0002] Polycarbonate (PC) is a non-crystalline thermoplastic with high impact strength and excellent creep resistance. Polybutylene terephthalate (PBT) is a crystalline thermoplastic with It has the advantages of fast crystallization speed, high rigidity, excellent chemical resistance, and good melt fluidity. The blending modification of PC and PBT can not only make up for the shortcomings of high melt viscosity, poor fluidity, and poor solvent resistance of PC, but also improve the defects of PBT's low impact resistance. It can be widely used in automotive engineering, electrical and electronic engineering , Sports and leisure products. [0003] However, due to the -OH group at the end of the PC molecular chain and the -OH and -COOH groups at the en...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L63/00C08L51/00C08K9/06C08K9/04C08K7/14C08K5/3492
CPCC08L67/02C08L2207/53C08L69/00C08L63/00C08L51/003C08K9/06C08K9/04C08K7/14C08K5/34924
Inventor 陈伟陈平绪叶南飚莫文杰龚德君冯健付学俊
Owner KINGFA SCI & TECH CO LTD
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