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A glass fiber reinforced PBT/PC alloy with high strength, low warpage and high heat distortion temperature and its preparation method and application

A technology of deformation temperature and high strength, applied in the field of glass fiber reinforced PBT/PC alloy and its preparation, can solve the problems of limited improvement in performance and achieve the effect of optimal tensile strength

Active Publication Date: 2022-03-01
KINGFA SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvement of performance by only using ester inhibitors is still limited, and further improvement is necessary

Method used

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  • A glass fiber reinforced PBT/PC alloy with high strength, low warpage and high heat distortion temperature and its preparation method and application
  • A glass fiber reinforced PBT/PC alloy with high strength, low warpage and high heat distortion temperature and its preparation method and application
  • A glass fiber reinforced PBT/PC alloy with high strength, low warpage and high heat distortion temperature and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18

[0053]Warpage test: Inject the PBT / PC alloy into a 100*100*1.5mm square plate, press one corner with a 1kg weight, and measure the height h from the diagonal to the horizontal plane with a vernier caliper, in mm. Embodiment 1~18 and comparative example 1~6

[0054] According to the formula of table 1~table 3, preparation embodiment 1~18 and comparative example 1~6, concrete preparation steps are as follows:

[0055] S1. Dry PBT resin and PC resin at 120-140°C for 4-6 hours;

[0056] S2. Mix the dried PBT resin and PC resin with polycarbodiimide and antioxidant in S1. Feed from the main feeding port of the twin-screw extruder, and the glass fiber is fed from the side of the twin-screw extruder. feeding port feeding;

[0057] S3. Set the temperature of each zone of the twin-screw extruder to 220-250° C. for extrusion, and the speed of the twin-screw extruder to be 300-400 rpm. ;

[0058] S4. Post-processing after extrusion to obtain the PBT / PC alloy.

[0059] The performanc...

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Abstract

The invention provides a glass fiber reinforced PBT / PC alloy with high strength, low warpage and high heat distortion temperature, its preparation method and application. The PBT / PC alloy, calculated in parts by weight, includes the following components: PBT resin 37.3-64.6%; PC resin 0-37.3%; glass fiber 25-40%; transesterification inhibitor 0.2-1.5%; antioxidant 0.2-0.5%; the PBT resin is a PBT resin with a carboxyl-terminal content lower than 10mmol / kg, and the carboxyl-terminal content test method is according to GB / T 14190-2017; the PC resin is a PC resin with a hydroxyl-terminal content lower than 10ppm. By selecting the carboxyl group content in PBT and the hydroxyl group content in PC, the alloy has better tensile strength, heat distortion temperature, and warpage, and can be applied to household appliances that require high heat distortion temperature and low warpage.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a glass fiber reinforced PBT / PC alloy with high strength, low warpage and high heat distortion temperature and its preparation method and application. Background technique [0002] PBT resin is a crystalline thermoplastic with fast crystallization speed, good chemical resistance and heat resistance, but has disadvantages such as large molding shrinkage rate and low notched impact strength. As an amorphous engineering plastic, PC has excellent comprehensive properties, especially high impact strength and good dimensional stability, but PC has poor fluidity, poor solvent resistance, easy wear and high price. Blending PBT and PC can learn from each other and obtain an alloy material with excellent comprehensive properties. In the home appliance and fan industry, in order to solve the problem of glass fiber reinforced PBT warping, PC is often added to PBT. However, when P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L69/00C08L79/00C08K7/14
CPCC08L67/02C08L69/00C08L2201/08C08K2201/003C08K2201/004C08L79/00C08K7/14
Inventor 莫文杰黄险波叶南飚朱文龚德君冯健付学俊
Owner KINGFA SCI & TECH CO LTD
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