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Antistatic polycarbonate/polyester alloy material and preparation method thereof

A polycarbonate and polyester alloy technology, applied in the field of antistatic polymers, can solve the problems of poor solvent resistance, high melt viscosity, stress cracking, etc., and achieve stress cracking resistance, low melt viscosity, and reduce raw material costs Effect

Active Publication Date: 2013-01-30
上海冠旗电子新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an antistatic polycarbonate / polyester alloy material and its preparation method to solve the problems of poor solvent resistance, high melt viscosity and prone to stress cracking of polycarbonate in the prior art. disadvantages such as relatively high prices

Method used

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preparation example Construction

[0031] A preparation method of antistatic polycarbonate / polyester alloy material, comprising the following steps:

[0032] 1) Dry polycarbonate, polyester and conductive carbon black at 100-110°C for 12-24 hours;

[0033] 2) Mix 1~4% compatibilizer, 0.01~0.05% transesterification catalyst, 0.1~0.5% antioxidant, 0~5% heat stabilizer and 0.2~1% lubricant in a high mixer for 10~ 20 minutes;

[0034] 3) Put the mixture obtained in step 2, 50-70% polycarbonate and 10-30% polyester into the internal mixer until melting;

[0035] 4) Put 5~25% conductive carbon black into the internal mixer, kneading time is 5~8 minutes, and the temperature is 270~290°C;

[0036] 5) Send the melt obtained in step 4 into a twin-screw extruder, the speed of the extruder is 150~300 rpm, melt extrusion at a temperature of 260~280°C, and pelletize.

[0037] In order to facilitate the further understanding of the present invention, the present invention is described in detail in conjunction with specific...

Embodiment 1

[0039]According to the data given in Example 1 of Table 1, first, the Teijin L-1259Y polycarbonate and the Teijin TR 850 polyester were air-dried at 100°C for 12 hours; then the epoxy equivalent 699~700g / eq Bisphenol A solid epoxy resin, calcium stearate, triethyl phosphate, tris(2,4-di-tert-butylphenyl) phosphite and 2,2 methylene-bis(4-methyl- 6-tert-butylphenol) according to the composition of mass ratio 2:1, anhydrous lanthanum acetate were mixed in the high mixer for 15 minutes, and the mixture in the high mixer was dropped into the internal mixer together with polycarbonate and polyester , until melting; then put Cabot VULCANXC72 conductive carbon black into the internal mixer and knead for 8 minutes, the kneading temperature is 280 ° C; finally, the melt obtained by kneading the internal mixer is sent to the twin-screw extruder for melting and extrusion, For granulation, the speed of the extruder is 150 rpm, the temperature of the first zone of the extruder is 260~265°C...

Embodiment 2

[0042] According to the data given in Example 1 of Table 1, first, the Teijin L-1259Y polycarbonate and the Teijin TR 850 polyester were air-dried at 100°C for 12 hours; then the epoxy equivalent was 600~700g / eq Bisphenol A solid epoxy resin, calcium stearate, triphenyl phosphite, tris (2,4-di-tert-butylphenyl) phosphite composition according to the mass ratio of 2:1, lanthanum acetylacetonate Mix in the high mixer for 15 minutes, put the mixture in the high mixer into the internal mixer together with polycarbonate and polyester until it melts; then put Cabot VULCANXC72 conductive carbon black into the internal mixer and knead for 5 minutes , the kneading temperature is 270°C; finally, the melt kneaded by the internal mixer is sent to the twin-screw extruder for melt extrusion and granulation. 250~255℃, the temperature of the second zone is 255~260℃, the temperature of the third zone is 255~260℃, the temperature of the fourth zone is 260~265℃, and the temperature of the machin...

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Abstract

The invention relates to the field of antistatic polymers, in particular to a polycarbonate / polyester alloy material and a preparation method thereof. The antistatic polycarbonate / polyester alloy material comprises the following components in percentage by weight: 5 to 25 percent of conductive carbon black, 50 to 70 percent of polycarbonate, 10 to 30 percent of polyester, 0. 01 to 0.05 percent of ester exchange catalyst, 1 to 4 percent of compatilizer, 0.1 to 0.5 percent of antioxidant and 0.2 to 1 percent of lubricant; and the preparation method comprises the following steps of: mixing the compatilizer, the ester exchange catalyst, the antioxidant, the heat stabilizer and the lubricant in a high-speed mixing machine; putting the mixture with the polycarbonate and the polyester into an internal mixer until the mixture is molten; and putting the conductive carbon black into the internal mixer, feeding the melt into a twin screw extruder for melt extrusion and prilling. By the method, the prepared alloy material has good performance, good solvent performance and low melt viscosity, stress crack is avoided, and the raw material cost is reduced.

Description

technical field [0001] The invention relates to the field of antistatic polymers, in particular to a polycarbonate / polyester alloy material and a preparation method thereof. Background technique [0002] Polycarbonate is a widely used thermoplastic engineering plastic, which has the advantages of high rigidity, high elastic modulus, good thermal stability, and dimensional stability, making it widely used in machinery, tool casings, bodies, computers and televisions. The electrical industry has been widely used. Polycarbonate is an electrical insulator, and it is easy to generate static electricity and cause damage to electronic appliances. In order to prevent losses caused by static electricity, it can be combined with conductive materials. Some existing materials have disclosed that some carbon fibers, conductive carbon black, carbon nanotubes, etc. are used as conductive materials to be added to polycarbonate materials to prepare antistatic polycarbonate materials. In vi...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L63/02C08K13/02C08K3/04
Inventor 林峰
Owner 上海冠旗电子新材料股份有限公司
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