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PC-PA alloy material with outstanding heat resisting stability and preparation method thereof

A heat-resistant stability, alloy material technology, applied in the field of alloy materials, can solve the problems of oligomers, affecting the thermal stability of material molding, etc., to achieve outstanding heat resistance stability, promote compatibility, and inhibit low-molecular polymerization the effect of things

Active Publication Date: 2015-12-23
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are not many research reports on PC / PA alloys at present, mainly because PA contains a large number of polar amide groups and is very easy to absorb water. The occurrence of hydrothermal oxygen degradation and transesterification reaction produces some oligomers, which greatly affects the molding thermal stability of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A PC / PA alloy material with outstanding heat resistance stability and a preparation method thereof, comprising the following steps:

[0027] (1) Weigh each component by weight: PC: 70, PA: 22, toughening agent: 5, compatibilizer: 3, transesterification inhibitor 0.5, antioxidant 0.3, lubricant 0.3.

[0028] (2) Pre-mix the raw materials in the mixing mixer for 5-10 minutes, add them into the twin-screw extruder from the main feeding port, melt and extrude them at 250°C, and the screw extruder speed is 450rpm, preferably with weak shear Advanced screw combination and strict control of the vacuum degree in the extrusion process, the corresponding products can be obtained after melt extrusion and granulation.

Embodiment 2

[0030] A PC / PA alloy material with outstanding heat resistance stability and a preparation method thereof, comprising the following steps:

[0031] (1) Weigh each component by weight: PC: 60, PA: 30, toughening agent: 3, compatibilizer: 7, transesterification inhibitor 0.3, antioxidant 0.3, lubricant 0.3.

[0032] (2) Pre-mix the raw materials in the mixing mixer for 5-10 minutes, add them into the twin-screw extruder from the main feeding port, melt and extrude them at 250°C, and the screw extruder speed is 450rpm, preferably with weak shear Advanced screw combination and strict control of the vacuum degree in the extrusion process, the corresponding products can be obtained after melt extrusion and granulation.

Embodiment 3

[0034] A PC / PA alloy material with outstanding heat resistance stability and a preparation method thereof, comprising the following steps:

[0035] (1) Weigh each component by weight: PC: 85, PA: 15, toughening agent: 1, compatibilizer: 2, transesterification inhibitor 0.5, antioxidant 0.3, lubricant 0.3.

[0036] (2) Pre-mix the raw materials in the mixing mixer for 5-10 minutes, add them into the twin-screw extruder from the main feeding port, melt and extrude them at 250°C, and the screw extruder speed is 450rpm, preferably with weak shear Advanced screw combination and strict control of the vacuum degree in the extrusion process, the corresponding products can be obtained after melt extrusion and granulation.

[0037] Specific implementation effect

[0038] Before preparing the sample strip and sample plate, the particles need to be fully dried, and after the sample preparation, place it for 24 hours before testing. Injection of various test specimens and swatches was pe...

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Abstract

The invention relates to a PC-PA alloy material with the outstanding heat resisting stability and a preparation method thereof. The PC-PA alloy material is prepared from, by weight, 60-85 parts of PC resin, 15-30 parts of PA resin, 1-8 parts of toughening agents, 1-8 parts of compatilizers, 0.1-1 part of ester exchange inhibitors, 0.1-1 part of antioxidants and 0.1-1 part of lubricating agents. The preparation method of the PC-PA alloy material comprises the following steps that the raw materials are added in a mixing blender to be premixed for 5-10 min, then the premixed materials are added into a double-screw extruder from a main feeding port to be extruded at the melting temperature of 230 DEG C-280 DEG C, the revolving speed of the screw extruder is 350-550 rpm, the materials are cooled through water and palletized, and the PC-PA alloy material is obtained. Compared with the prior art, the PC-PA alloy material has the advantages that by adding the compatilizers, compatibility between the PC resin and the PA resin is facilitated, and an end sealing effect on more sensitive PC molecular chains is achieved; meanwhile, through the ester exchange inhibitors, hydrothermal degradation of PC and PA in the extruding process is effectively controlled, generation of low molecular polymers is inhibited, and therefore PC-PA alloy material with the outstanding heat resisting stability can be obtained.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a PC / PA alloy material with outstanding heat resistance stability and a preparation method thereof. Background technique [0002] The polycarbonate aromatic polycarbonate (PC), which is often said to be polycarbonate, is a thermoplastic engineering plastic with excellent comprehensive properties. The soft carbonate bonds in its macromolecular chain are alternately combined with the more rigid aralkylene groups, endowing it with excellent impact toughness, transparency, and high heat resistance. Nylon (Nylon), Chinese name polyamide, English abbreviation PA, is the general term for thermoplastic resins containing repeated amide groups -[NHCO]- on the main chain of the molecule; it has high crystallinity, obvious melting point; high surface hardness and wear resistance , Rigid outstanding. Therefore, the ideal PC / PA alloy has the advantages of both PC and PA resin. On the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L77/00C08L51/00C08K13/02C08K3/32C08K5/103B29B9/06
Inventor 钱进李强罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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