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Preparation method of anti-drip agent based on electrostatic adsorption and wrapping

An anti-drip agent and electrostatic adsorption technology, applied in the field of anti-drip agent preparation, can solve the problems of poor dispersibility of polytetrafluoroethylene and difficult to add, and achieve the effects of increasing binding force, enhancing stability and improving stability

Inactive Publication Date: 2013-10-30
HANGZHOU COLORICH CHEM MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersibility of polytetrafluoroethylene is poor, which makes it difficult to add. In order to improve the dispersion of polytetrafluoroethylene particles, a layer of polymer can be wrapped on the polytetrafluoroethylene particles to improve its surface properties and achieve better Dispersion properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Weigh 0.1g of dodecyldimethylbenzyl ammonium chloride and 0.05g of cetyltrimethylammonium chloride, 19.2g of styrene (St) and 4.8g of acrylonitrile (An), add a certain A certain amount of distilled water was added into a 500ml flask, and magnetically stirred for 30min to prepare a pre-emulsion.

[0022] 2. Put the pre-emulsion into the round bottom flask, then add 0.05g of azobisisobutyronitrile (AIBN), react at a constant temperature of 70°C, and keep 120r / min. After 2 hours of reaction, the temperature was raised to 75°C, and an appropriate amount of initiator (AIBN) was continued to be added to increase the monomer conversion rate. The reaction was carried out for 4 hours, and the total reaction time was 6 hours.

[0023] 3. Weigh 40ml of PTFE dispersion and the same amount of polymer emulsion, heat to 90°C, add 1mol / L acetic acid solution and 1mol / L MgSO 4 solution, a large amount of precipitate was obtained after stirring.

[0024] 4. Suction filtration under ...

Embodiment 2

[0026] 1. Weigh 0.1g of dodecyldimethylbenzyl ammonium chloride and 0.05g of cetyltrimethylammonium chloride, 19.2g of styrene (St) and 4.8g of acrylonitrile (An), add a certain A certain amount of distilled water was added into a 500ml flask, and magnetically stirred for 30min to prepare a pre-emulsion.

[0027] 2. Put the pre-emulsion into the round bottom flask, then add 0.05g of potassium persulfate (KPS), and react at a constant temperature of 70°C, keeping 120r / min. After reacting for 2 hours, raise the temperature to 75°C, continue to add an appropriate amount of initiator (KPS) to increase the conversion rate of the monomer, react for 4 hours, and the total reaction time is 6 hours.

[0028] 3. Weigh 40ml of PTFE dispersion and the same amount of polymer emulsion, heat to 90°C, add 1mol / L acetic acid solution and 1mol / L MgSO 4 solution, a large amount of precipitate was obtained after stirring.

[0029] 4. Suction filtration under reduced pressure was carried out on ...

Embodiment 3

[0031] 1. Weigh 0.2g of dodecyldimethylbenzyl ammonium chloride and 0.1g of cetyltrimethylammonium chloride, 57.6g of styrene (St) and 14.4g of acrylonitrile (An), add a certain A certain amount of distilled water was added into a 500ml flask, and magnetically stirred for 30min to prepare a pre-emulsion.

[0032] 2. Put the pre-emulsion into the round bottom flask, then add 0.25g of potassium persulfate (KPS), and react at a constant temperature of 70°C, keeping 120r / min. After reacting for 2 hours, raise the temperature to 75°C, continue to add an appropriate amount of initiator (KPS) to increase the conversion rate of the monomer, react for 4 hours, and the total reaction time is 6 hours.

[0033] 3. Weigh 120ml PTFE dispersion and the same amount of polymer emulsion, heat to 90°C, add 1mol / L acetic acid solution and 1mol / L MgSO 4 solution, a large amount of precipitate was obtained after stirring.

[0034] 4. Suction filtration under reduced pressure was carried out on th...

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Abstract

The invention relates to a preparation method of an anti-drip agent based on the electrostatic adsorption and wrapping. The preparation method comprises the following steps of: 1, measuring two reaction monomers according to a ratio of 4:1, adding 1% of cation surface active agent, and carrying out the pre-emulsification to obtain pre-emulsion; 2, adding the pre-emulsion into a round-bottom flask, adding deionized water which is twice of the total quantity of the monomers, uniformly mixing the deionized water with the pre-emulsion, maintaining rotating speed at 120 r / min, carrying out a polymerization reaction for 6 to 8h at the temperature of 70 to 80 DEG C, and cooling reaction products to the room temperature after the reaction to obtain polymer emulsion; 3, adding partial polymer emulsion into a polytetrafluoroethylene diffusion solution of the same volume, and heating and stirring the mixture to obtain a great amount of precipitate; and 4, carrying out vacuum filtration to the precipitate, washing the emulsifier through a given method, and drying and pulverizing the precipitate to obtain the anti-drip agent. By adopting the method, the stable polymer emulsion can be prepared, simplicity in operation can be realized, the cost is low, and the preparation method has the advantages that the polymerization process is stable and the product quality is consistent.

Description

Technical field: [0001] The invention relates to a method for preparing an anti-dripping agent, in particular to a method for preparing an anti-dripping agent based on electrostatic adsorption packaging. Background technique: [0002] Thermoplastic materials have the advantages of being lightweight, easy to manufacture and industrialized production. They are used in all aspects of our daily production and life, and have brought great impetus to human development. However, thermoplastic materials are easy to burn, soften and deform when heated, and even fall off. In the production process, it is necessary to add a flame retardant to make it have a wider scope of application, but the flame retardant can only reduce the probability of its burning, and does not solve the problem of its falling after being heated and deformed. In order to achieve anti-drip Some high molecular polymers with heat shrinkage properties have been used to improve the dripping problem of thermoplastic m...

Claims

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Application Information

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IPC IPC(8): C08J3/16C08L27/18C08L25/12C08F212/08C08F220/44C08F2/28
Inventor 聂成孙丁海燕杨晋涛
Owner HANGZHOU COLORICH CHEM MATERIALS
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