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Compound talcpowder and preparation method thereof

A technology of talc and titanate, applied in the direction of fibrous fillers, can solve the problems of poor product uniformity, wide particle size distribution, poor compatibility, etc., and achieve small particle diameter, good compatibility, particle size The effect of uniform diameter distribution

Active Publication Date: 2013-03-13
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Superfine talcum powder is prepared by the above method, but this method cannot meet the absolute particle size of 2-3um, and the particle size distribution range is wide, the uniformity of the product is not good, and the compatibility with organic matter is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The present invention also provides a kind of preparation method of composite talcum powder, comprising:

[0030] 1) Weigh talcum powder, ethanol, and titanate in proportion and put them into the grinder for the first grinding, then add part of the titanate for the second grinding, and then add the rest to the grinder after a certain period of time The titanate is ground for the third time to obtain the initial grinding slurry;

[0031] 2) Mix the primary grinding slurry prepared in step (1) with the weighed silane and grind for the fourth time to obtain the grinding slurry, dry the grinding slurry to obtain a composite talcum powder, the composite talc powder , including talcum powder, titanate, silane, characterized in that the diameter of the talcum powder ranges from 100nm to 3um, and the average particle diameter is 350 to 400nm. Based on the total volume of the composite talcum powder, the particles of 100 to 500nm Accounted for 68-73%, 0.5-1.0um particles accoun...

Embodiment 1

[0044] This embodiment is used to illustrate the composite talcum powder provided by the present invention and its preparation method.

[0045] Weigh 10Kg of talcum powder and 20Kg of ethanol produced by Jinlonghui Company with an average particle size of 2500 mesh, put them into a grinder (DMQ series of Qingdao Lianrui Precision Machinery Co., Ltd.), mix and grind for 3 hours at 1000rpm, and 100g The isopropyl tris (dioctyl pyrophosphate acyl) titanate coupling agent (NDZ201 for short) was added to it, and ground for 3 hours under the condition of 1200rpm, and 100g of NDZ201 was added to the above mixture, under the condition of 1500 Grind for 3h to obtain a grinding slurry, then add 100g of gamma-aminopropyltriethoxysilane coupling agent (abbreviated as KH550) to the grinding slurry and grind for 3h under the condition of 1800rpm to obtain a grinding slurry. Put the abrasive slurry into a vacuum oven and dry it at 60-120°C to obtain the composite talc powder sample T1.

Embodiment 2

[0047] This embodiment is used to illustrate the composite talcum powder provided by the present invention and its preparation method.

[0048] Weigh 20Kg of Jinlonghui talcum powder with an average particle diameter of 1000 mesh, 20Kg of ethanol, put them into a grinder (DMQ series of Qingdao Lianrui Precision Machinery Co., Ltd.), mix and grind for 5 hours under the condition of 1000rpm, and 400g of iso Propyl tris (dioctyl pyrophosphate acyl) titanate coupling agent (NDZ201 for short) was added to it, and ground at 1200rpm for 4h, 200g of NDZ201 was added to the above mixture, and ground at 1500rpm for 3h , to obtain the grinding slurry, then add 200g of gamma-aminopropyltriethoxysilane coupling agent (abbreviated as KH550) to the grinding slurry and grind for 3h under the condition of 1800rpm to obtain the grinding slurry, the grinding slurry Put the material into a vacuum oven and dry it at 60-120°C to obtain the composite talc powder sample T2.

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Abstract

The invention provides compound talcpowder and a preparation method thereof. The compound talcpowder comprises talcpowder, titanate and silane; the compound talcpowder has a diameter range of between 100 nm and 3 um and the average particle size of between 350 and 400 nm; and based on the total volume of the talcpowder, particles with the diameter of between 100 and 500 nm account for 68 to 73 percent, particles with the diameter of between 0.5 and 1.0 um account for 20 to 24 percent, and particles with the diameter of between 1 and 3 um account for 7 to 8 percent. The compound talcpowder prepared by the method provided by the invention has the characteristics of good uniformity of particle size distribution and the maximum particle size of less than 3 mu m.

Description

technical field [0001] The invention relates to a composite talc powder and a preparation method thereof. Background technique [0002] Talc is a layered hydrous magnesium silicate with good electrical insulation, heat resistance and mechanical properties. It can be added to organic materials as a filler to improve the thermal expansion and mechanical properties of composite materials. Talc and strong acid Generally, it does not work with strong alkali and has good chemical stability; my country's talc reserves are abundant and the price is low. Its many characteristics determine that it is widely used as a filler in electronic packaging materials, military packaging materials, automotive instruments and other fields. application. With the continuous improvement of the requirements for the fine miniaturization of products in the above fields, it puts forward higher requirements for the size of fillers and their compatibility with organic resins. [0003] At present, domestic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/06C09C1/28
Inventor 陈旭陈靖华杨卫国
Owner BYD CO LTD