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Preparation method of mica powder modified foam material

A foaming material and mica powder technology, applied in the field of foaming material preparation, can solve problems such as poor heat resistance and cold resistance, poor product dimensional stability, poor molding processability, etc., to reduce mechanical properties, improve molding processability, increase Effects of Steel Toughness and Modulus

Inactive Publication Date: 2015-08-12
威海耐特新型材料科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of existing RPVC foaming materials such as high production cost, poor product dimensional stability, poor heat and cold resistance, low steel toughness, and poor formability, and provides a method that can reduce production costs and improve product dimensional stability. Preparation method of foaming material modified by mica powder, heat resistance and cold resistance, steel toughness and formability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method among the present invention comprises the following steps:

[0016] In the first step, the raw sericite powder in the tailings is washed, stripped, flotation, and magnetically separated to remove impurities to obtain refined sericite powder, and then remove water in a dryer, and the dehydration temperature in the device is controlled at 600-800°C , time 30-50min, so that the water content of the refined sericite powder is ≤0.4%, and the particle size distribution is 0.2 micron-1.0 micron.

[0017] The second step, the modification process of ultrafine sericite powder: the modification is carried out in a stepless speed-variable high-speed stirring kettle (produced by Qingdao Sanyi Plastic Machinery Co., Ltd.), and the refined sericite powder formed in step 1 is combined with compound coupling Stir together with the agent in a stepless speed-variable high-speed stirring tank. The modification process conditions are: the temperature of the interlaye...

Embodiment 2

[0027] In the first step, the raw sericite powder in the tailings is washed, stripped, flotation, and magnetically separated to remove impurities to obtain refined sericite powder, and then remove water in the dryer, and the dehydration temperature in the device is controlled at 600-800°C , time 30-50min, so that the water content of the refined sericite powder is ≤0.4%, and the particle size distribution is 0.2 micron-1.0 micron.

[0028] The second step, the modification process of ultra-fine sericite powder: the modification is carried out in a continuously variable speed high-speed stirring tank. Stirring in the middle, the modification process conditions are as follows: the temperature of the interlayer of the kettle wall is controlled at 100-115°C, the speed of the main machine is 50-1200RPM, and the processing time is 15-25min.

[0029] Composite coupling agent comprises silane coupling agent, titanate coupling agent, borate ester coupling agent, the weight of added sil...

Embodiment 3

[0036] The preparation method comprises the following steps:

[0037] In the first step, the raw sericite powder in the tailings is washed, stripped, flotation, and magnetically separated to remove impurities to obtain refined sericite powder, and then remove water in the dryer, and the dehydration temperature in the device is controlled at 500-700°C , time 40-60min, so that the water content of the refined sericite powder is ≤0.4%, and the particle size distribution is 0.2 micron-0.4 micron.

[0038] The second step, the modification process of ultra-fine sericite powder: the modification is carried out in a continuously variable speed high-speed stirring kettle, and the refined sericite powder formed in step 1 and the composite coupling agent are put together in a continuously variable speed high-speed stirring kettle Medium stirring, modification process conditions are: the temperature control of the interlayer of the kettle wall is at 100-115°C, the speed of the main machi...

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Abstract

The invention relates to a preparation method of a mica powder modified foam material. The technical problems of high production cost, poor dimension stability, poor heat and cold resistance, low rigidity toughness and low molding processability of present RPVC foam materials are solved. The method comprises the following steps: removing impurities from sericite raw powder in mine tailing to obtain purified sericite powder, dehydrating, modifying the purified sericite powder, and carrying out foam material extrusion to make foam sheets or section bars. The method is widely used to prepare foam materials.

Description

technical field [0001] The invention relates to a preparation method of a polymer composite foaming material, in particular to a preparation method of a mica powder modified foaming material. Background technique [0002] The foaming material based on PVC (polyvinyl chloride) has a lot of development results at home and abroad, and there are many types and specifications of its products. There are different classifications from different angles. Only from the hardness of the foam material, it can be divided into soft foam material and hard foam material. The former PVC resin needs a large amount of plasticizer components, and the latter generally has no plasticizer. , only a small amount of plasticizer is added; from the density of the foam body, it can be divided into high foam, medium foam and micro foam; It can be divided into foamed sheet, foamed profile, and foamed pipe. Among them, micro-foaming and medium-low foaming plates have a large production capacity and are w...

Claims

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Application Information

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IPC IPC(8): C08J9/04C08L27/06C08K9/06C08K9/04C08K3/34B29C47/92B29C48/92
Inventor 姜中海陈占勋
Owner 威海耐特新型材料科技开发有限公司
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