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Method for preparing polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and product

A polytetrafluoroethylene and blend technology, which is applied in the field of high-efficiency, environmental-friendly and low-cost preparation of polytetrafluoroethylene blends, can solve problems such as poor compatibility, poor dispersibility, and large pollution, and achieve high production efficiency and stability. High, easy-to-use effects

Active Publication Date: 2020-01-07
铨盛聚碳科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a polytetrafluoroethylene blend, which not only has the characteristics of a coated anti-dripping agent, but also solves the problem of poor dispersion of polytetrafluoroethylene and other materials The problem of poor tolerance avoids the agglomeration of the polytetrafluoroethylene blend when added to the flame-retardant modified polymer material, and avoids the large pollution caused by the preparation of the existing coated anti-dripping agent itself using polytetrafluoroethylene emulsion Problems of high cost and low efficiency

Method used

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  • Method for preparing polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and product
  • Method for preparing polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and product
  • Method for preparing polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and product

Examples

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Embodiment 1

[0042] A method for preparing polytetrafluoroethylene blends with high efficiency, environmental protection and low cost, comprising the steps of:

[0043] (S1), stir 3 parts of emulsifier, 50 parts of water and 23 parts of unsaturated monomer in parts by weight at a speed of 200 r / min to obtain a mixed solution;

[0044] (S2), heating the mixed solution obtained in step (S1) to 60° C., then adding 0.5 parts of initiator and stirring for 3 hours to obtain a polymer resin emulsion;

[0045] (S3) Mix 100 parts by weight of water, 50 parts by weight of suspension polytetrafluoroethylene resin powder and 50 parts by weight of solid polymer resin emulsion, and stir at 50° C. for 2 hours to obtain a mixed emulsion;

[0046] (S4) Process the mixed emulsion obtained in step (S3) into powder to prepare a polytetrafluoroethylene blend.

[0047] The emulsifier is formed by mixing an anionic emulsifier and a nonionic emulsifier in a weight ratio of 3:1.

[0048] The anionic emulsifier i...

Embodiment 2

[0057] A method for preparing polytetrafluoroethylene blends with high efficiency, environmental protection and low cost, comprising the steps of:

[0058] (S1), stir 1 part of emulsifier, 30 parts of water and 15 parts of unsaturated monomer in parts by weight at a speed of 100 r / min to obtain a mixed solution;

[0059] (S2), heating the mixed solution obtained in step (S1) to 50° C., then adding 0.05 parts of an initiator and stirring for 2 hours to obtain a polymer resin emulsion;

[0060] (S3) Mix 80 parts by weight of water, 5 parts by weight of suspension polytetrafluoroethylene resin powder and 5 parts by weight of solid polymer resin emulsion, and stir at 30° C. for 1 hour to obtain a mixed emulsion;

[0061] (S4) Process the mixed emulsion obtained in step (S3) into powder to prepare a polytetrafluoroethylene blend.

[0062] The emulsifier is formed by mixing an anionic emulsifier and a nonionic emulsifier in a weight ratio of 2:1.

[0063] Described anionic emulsif...

Embodiment 3

[0073] A method for preparing polytetrafluoroethylene blends with high efficiency, environmental protection and low cost, comprising the steps of:

[0074] (S1), stir 5 parts of emulsifier, 60 parts of water and 30 parts of unsaturated monomer in parts by weight at a speed of 300 r / min to obtain a mixed solution;

[0075] (S2), heating the mixed solution obtained in step (S1) to 80° C., then adding 1 part of initiator and stirring for 4 hours to obtain a polymer resin emulsion;

[0076] (S3) Mix 120 parts by weight of water, 95 parts by weight of suspension polytetrafluoroethylene resin powder and 95 parts by weight of solid polymer resin emulsion, and stir at 80° C. for 3 hours to obtain a mixed emulsion;

[0077] (S4) Process the mixed emulsion obtained in step (S3) into powder to prepare a polytetrafluoroethylene blend.

[0078] The emulsifier is formed by mixing an anionic emulsifier and a nonionic emulsifier in a weight ratio of 4:2.

[0079] The anionic emulsifier is f...

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Abstract

The invention relates to the technical field of anti-dripping agents, and in particular, relates to a method for preparing a polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and the product. The preparation method comprises the steps: blending a prepared polymer resin emulsion and suspension-method polytetrafluoroethylene resin powder, and powdering to obtain the polytetrafluoroethylene blend. Compared with a method for preparing a polytetrafluoroethylene blend from a polytetrafluoroethylene emulsion, the preparation method adopts the suspension-methodpolytetrafluoroethylene resin powder which is low in cost, controllable in particle size, high in stability and convenient to store; a surfactant PFOA harmful to the environment and human bodies is not contained, environmental pollution caused by using high-cost polytetrafluoroethylene emulsion is avoided. The preparation method is simple to operate, convenient to control, high in production efficiency, low in production cost and environment-friendly, and can be used for large-scale production.

Description

technical field [0001] The invention relates to the technical field of anti-dripping agents, in particular to a method and product for preparing polytetrafluoroethylene blends with high efficiency, environmental protection and low cost. Background technique [0002] Polytetrafluoroethylene (PTFE) has excellent heat resistance, cold resistance, and chemical resistance. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is extremely low. It is widely used in national defense, atomic energy, petroleum, radio, etc. , electrical machinery, chemical industry and other important sectors. [0003] Due to the low intermolecular force of polytetrafluoroethylene, fibrillation occurs under weak stress, so by adding polytetrafluoroethylene as an anti-dripping agent to the polymer resin, it is fibrillated, thereby suppressing flame droplet during combustion dripping, improve the flame retardant grade. [0004] The existing PTFE an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L27/18C08L25/14C08L25/16C08L33/20C08L25/12C08L31/02C08L33/12C08L33/10C08F212/08C08F220/14C08F2/26C08F2/30C08F212/12C08F210/02C08F120/44C08F220/44C08F236/12C08F218/10C08F236/06C08F236/08C08F220/18C08F210/06C08F210/10C08L67/02
CPCC08J3/12C08F212/08C08F212/12C08F2/26C08F2/30C08F120/44C08F218/10C08F220/18C08F220/14C08L67/02C08J2327/18C08J2425/14C08J2325/14C08J2427/18C08J2325/16C08J2425/16C08J2433/20C08J2333/20C08J2425/12C08J2431/02C08J2433/12C08J2433/10C08L2201/02C08L2205/035C08F210/02C08F220/44C08F236/12C08F236/06C08F236/08C08L27/18C08L25/14C08L25/16C08L33/20C08L25/12C08L31/02C08L33/12C08L33/10
Inventor 王启瑶
Owner 铨盛聚碳科技股份有限公司
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