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Flocculant and preparation method thereof

A coagulant and organic solvent technology, applied in the field of coagulant and its preparation, can solve the problems of harsh preparation conditions and increase the cost of rubber enterprises, and achieve the effect of fast powder formation and low loss

Active Publication Date: 2015-06-24
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation conditions of this method are relatively harsh, and the stirring speed must be between 3000-10000 rpm, which puts higher requirements on the stirring equipment and increases the cost of rubber enterprises.

Method used

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  • Flocculant and preparation method thereof
  • Flocculant and preparation method thereof
  • Flocculant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 200g of polyperfluoroethylene propylene resin emulsion with a solid content of 30% and 50g of magnesium chloride aqueous solution with a mass percentage concentration of 30% into 200g of 95% ethanol, at room temperature, stirring at a speed of 200r / min, and fully mix to form a dispersion system .

Embodiment 2-7

[0026] According to the ratio of each raw material in Table 1, the coagulant was prepared according to the method of Example 1.

[0027] Table 1 Coagulant Raw Material Ratio

[0028]

[0029]

[0030] Preparation of powdered rubber

[0031] 1, utilize the coagulant of above-mentioned embodiment 1-7 gained to prepare powdered rubber, concrete preparation method is as follows:

[0032] Weigh 450 g of coagulant obtained in Example 1. Under stirring conditions, slowly add 1000g of fluororubber emulsion (30% dry rubber) to the coagulant at a rate of 200g / min. With the addition of the fluororubber emulsion, the fluororubber in the mixture is continuously coagulated and precipitated in the form of particles. The fluororubber particles and ethanol aqueous solution were separated by vacuum filtration, and the ethanol aqueous solution was recovered for reuse after treatment. The fluororubber particles were washed and dehydrated, and then dried in a vacuum oven at 55°C for 12 hou...

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Abstract

The invention relates to a flocculant which is prepared from the following components in parts by weight: 5-20 parts of polymer resin or emulsion thereof based on solid content, 5-30 parts of metal salt solution based on solute, and 10-200 parts of organic solvent. Powder rubber prepared from the flocculant disclosed by the invention is even in granulation, non-viscous in particles, fast to form powder, and high in production efficiency; and no agglomeration exists in storage. An organic solvent adopts a non-toxic or low-toxic solvent. The flocculant can be effectively recovered and repeatedly utilized after being used, is small in loss, and harmless to the environment, can be suitable for a powder forming technology of rubber latex which contains gel, does not contain the gel, and has high Mooney viscosity or low Mooney viscosity.

Description

technical field [0001] The invention relates to a coagulant and a preparation method thereof, in particular to a coagulant obtained by dispersing a high molecular polymer and a metal salt in an organic solvent. Background technique [0002] Compared with traditional block rubber, powder rubber has many advantages: it can be directly processed by extrusion, injection and other methods; it is conducive to continuous, automatic and computer control of the processing process; it can simplify the processing technology, shorten the mixing cycle, save investment, Reduce total cost and energy consumption, reduce labor intensity and improve working conditions. Its appearance can be regarded as a great revolution in the rubber industry, and it is highly valued by human beings. [0003] At present, the method for preparing powdered rubber is mainly based on coagulation method, so the selection of coagulant is very important. In the prior art, commonly used coagulants include solid alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/15
Inventor 曾波高家勇白鲸兰军赵媛媛张廷建王先荣余金龙
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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