Transparent polycarbonate/polybutylece terephthalate alloy and preparation method thereof

A technology of polybutylene terephthalate and polycarbonate, which is applied in the field of preparation of transparent polycarbonate and polybutylene terephthalate alloy, and can solve problems such as alloy transparency damage

Inactive Publication Date: 2010-06-30
ANHUI KEJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Maleic anhydride grafts and ethylene elastomers can improve the compatibility and toughness of PC / PBT alloys to a certain extent, but they are destructive to the transparency of the alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The premix is ​​prepared according to the following formula: polycarbonate 70%, polybutylene terephthalate 24%, compatibilizer PCTG 5%, antioxidant 1%. The mixed premix is ​​placed in a twin-screw machine for melt extrusion and granulation. The process is as follows: the temperature of the first stage of the twin-screw machine is 220-230 °C, the temperature of the second stage is 250-260 °C, the temperature of the third stage is 260-270 °C, the residence time is 1-2 minutes, and the pressure is 10-15MPa.

Embodiment 2

[0033] The premix was prepared according to the following formula: polycarbonate 73%, polybutylene terephthalate 22%, compatibilizer PETG 3%, antioxidant 2%. The mixed premix is ​​placed in a twin-screw machine for melt extrusion and granulation. The process is as follows: the temperature of the first stage of the twin-screw machine is 220-230 °C, the temperature of the second stage is 250-260 °C, the temperature of the third stage is 260-270 °C, the residence time is 1-2 minutes, and the pressure is 10-15MPa.

Embodiment 3

[0035] The premix is ​​prepared according to the following formula: polycarbonate 75%, polybutylene terephthalate 20%, compatibilizer PCTG 4%, and antioxidant 1%. The mixed premix is ​​placed in a twin-screw machine for melt extrusion and granulation. The process is as follows: the temperature of the first stage of the twin-screw machine is 220-230 °C, the temperature of the second stage is 250-260 °C, the temperature of the third stage is 260-270 °C, the residence time is 1-2 minutes, and the pressure is 10-15MPa.

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Abstract

The invention discloses a transparent polycarbonate / polybutylece terephthalate (PC / PBT) alloy and a preparation method thereof. The PC / PBT alloy is prepared from the following ingredients in percentage by weight: 70 to 75 percent of polycarbonate, 20 to 25 percent of polybutylece terephthalate, 3 to 5 percent of compatilizers and 1 to 2 percent of antioxidizers, wherein the compatilizers are copolyester. The transparent PC / PBT alloy of the invention has the advantages that the PC / PBT alloy prepared by the recipe and the process has good mold filling flowability, good processing performance, hydrolytic resistance, chemical resistance, high harness and difficult scratch formation, the excellent transparency is mainly maintained, glass fiber with the similar refractive index to PC can also be added as required for reinforcement, and the alloy can be used as substitute materials of PC and glass in special fields.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a transparent polycarbonate and a polybutylene terephthalate alloy. Background technique [0002] Polycarbonate (PC for short) is an excellent non-crystalline thermoplastic engineering plastic with outstanding impact resistance, good creep resistance and dimensional stability, heat resistance, low water absorption, non-toxicity, and dielectric properties. Excellent, it is the only product with good transparency among the five major engineering plastics, and it is also the general engineering plastic with the fastest growth rate in recent years. At present, it is widely used in automobile, electronic and electrical, construction, office equipment, packaging, sports equipment, medical care and other fields. However, unmodified polycarbonate still has shortcomings. It is manifested in insufficient processing fluidity and poor chemical resistance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08K5/134C08K5/526B29B9/00B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C48/9185B29C2948/92514B29C2948/92561B29C2948/92895B29C2948/92904
Inventor 何杰
Owner ANHUI KEJU NEW MATERIALS
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