Preparation of electrostatic resistant and conductive polypropylene blend

A polypropylene and blend technology is applied in the field of preparation of antistatic and conductive polypropylene blends, which can solve the problems of limited application and easy generation of static electricity hazards.

Active Publication Date: 2005-02-23
上海长宁橡胶制品厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its volume resistivity is at 10 16 ~10 20 The range of Ω·cm is prone to electrostatic haz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0019] Examples 1 to 5: Polypropylene (PP) with a melt index of 25g / 10min, epoxy resin (EP) with an epoxy equivalent of 2000g / eq, glass fiber (GF) treated with silane coupling agent KH550 and The conductive carbon black with a DBP absorption value of 168.6ml / 100g was mixed uniformly according to the formula in Table 1, and then added to the internal mixer at the same time, and melted and blended for 10 minutes at a processing temperature of 190℃ and a rotor speed of 30rpm to obtain an antistatic PP copolymer. Blend.

[0020] The antistatic PP blend obtained by banburying was pressed on a flat vulcanizing machine at 190°C for 5 minutes to obtain a test piece of about 1 mm thickness. The volume resistivity was tested according to the GB1410-78 standard, and the results are shown in Table 1.

[0021] Table 1 Formula and volume resistivity of antistatic PP blend

[0022] Formula (parts by mass) Volume resistivity

[0023] PP EP GF CB (Ω·cm)

Embodiment 1

[0026] Example 1 100 10 12.5 5 2.29×10 10

[0027] 2 100 12.5 12.5 5 9.48×10 8

[0028] 3 100 12.5 18.5 5 4.01×10 9

[0029] 4 100 18.5 18.5 5 1.70×10 9

[0030] 5 100 12.5 12.5 6.25 5.40×10 8

[0031] It can be seen from Table 1 that when adding 5 parts or 6.25 parts of CB, changing the amount of EP and GF, the volume resistivity of the obtained blend is 7-9 orders of magnitude lower than that of unmodified pure PP. Resistivity at 10 9 At about Ω·cm, the amount of CB required by the blend of the present invention is also less than that of the PP / CB system.

Embodiment 6～8

[0032] Examples 6-8: Polypropylene (PP) with a melt index of 25g / 10min, epoxy resin (EP) with an epoxy equivalent of 2000g / eq, glass fiber (GF) treated with silane coupling agent KH550 and Conductive carbon black with a DBP absorption value of 168.6ml / 100g is uniformly mixed according to the formula in Table 2 and then added to the internal mixer at the same time, and melted and blended for 10 minutes at a processing temperature of 190℃ and a rotor speed of 30rpm to obtain a conductive PP blend Things.

[0033] The conductive PP blend obtained by banburying was pressed on a flat vulcanizer at 190°C for 5 minutes to obtain a test piece of about 4 mm thickness. Prepare standard samples and test the volume resistivity according to the GB / T15662-1995 standard. The results are shown in Table 2.

[0034] Table 2 Formula and volume resistivity of conductive PP blend

[0035] Formula (parts by mass) Volume resistivity

[0036] PP EP GF CB (Ω·cm)

[0037] ...

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Abstract

This invention has offered a kind of antistatic and conductive polypropylene (pp) to mix the preparation method of the thing altogether. And charcoal PP mix composition of thing PP, epoxy resin, through unite glass fibre and charcoal black electric conduction that pharmaceutical deal with occasionally altogether. Join above-mentioned composition in the dense smelting machine under 170-210deg.C temperature, in the course of shearing and mixing, will form carbon black distribute among epoxy resin, epoxy resin is it cover on the glass fibre surface to wrap up spontaneous, and through joining forming the complex system that the electric conduction goes the same way among the glass fibre, can reduce the resistivity of volume of PP effectively. Preparation that invention offer this method processing technology simple, can regulate the resistivity of PP in heavy range, antistatic and conductive PP got mixes the resistivity of things altogether steadily, the reappearing is good.

Description

Technical field: [0001] The invention relates to a method for preparing an antistatic and conductive polypropylene (PP) blend, in particular to a method for preparing a multi-element composite antistatic and conductive PP blend by blending with polar polymers and the like. Background technique: [0002] PP has good tensile strength, compressive strength and hardness, and also has excellent heat resistance, chemical resistance and electrical insulation. It is a versatile plastic with a wide range of applications. However, its volume resistivity is 10 16 ~10 20 The range of Ω·cm is prone to electrostatic hazards during use, which limits its application in electronics, petrochemical, medical and other fields. [0003] In order to reduce the volume resistivity of PP, a large number of studies have been conducted on PP blending systems with conductive carbon black added at home and abroad. The blend of Chinese patent CN 1312321A includes PP, ethylene-vinyl acetate copolymer (EVA) and ...

Claims

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Application Information

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IPC IPC(8): C08K7/14C08L23/12C09K3/16H01B1/24
Inventor 李莹张勇王仕峰张隐西
Owner 上海长宁橡胶制品厂有限公司
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