PFOS and PFOA-free insoluble aqueous film-forming foam extinguishing agent and preparation method thereof

A foam fire extinguishing agent and water film-forming technology, which can be used in fire protection equipment and other directions, can solve problems such as poor degradation performance of fluorocarbon surfactants and difficulty in decomposing organic pollutants, and achieve high environmental protection and pollution reduction effects.

Inactive Publication Date: 2020-04-24
江苏锁龙消防科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Perfluorooctanesulfonyl compounds (PFOS) and perfluorooctanoic acid (PFOA) are important perfluorinated surfactants, which have the characteristics of hydrophobic and oleophobic. Fluorocarbon surfactants commonly used in aqueous film-forming foam fire extinguishing agents have extremely Strong persistence can ensure the high stability of the fire extinguishing agent in many environments; however, the degradation performance of this fluorocarbon surfactant is extremely poor, and it is a relatively difficult to decompose organic pollutant; in order to achieve green sustainable development and fulfill As a solemn commitment to the protection of the global environment, my country has gradually introduced perfluorooctane sulfonic acid and its salts and perfluorooctane sulfonyl fluoride products (PFOS products) that have been included in the list of persistent organic pollutants. Increase control; as practitioners in the fire protection industry, in accordance with the environmental protection requirements of relevant industries, while strengthening management and risk prevention, start to carry out research on alternative technologies, gradually phase out the use of such products in fire extinguishing agents, and reduce product consumption as much as possible. pollute the environment

Method used

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  • PFOS and PFOA-free insoluble aqueous film-forming foam extinguishing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The composition of the fire extinguishing agent includes xanthan gum 1% by weight, 5% fluorocarbon surfactant without PFOS and PFOA, 15% combined hydrocarbon surfactant (alkyl glucoside 10%+cocamidopropyl betaine 5%), antifreeze agent 45%, solubilizer 4% and water 30%; Xanthan gum is fully dissolved in pure water first, then mixed with other components and transferred to a mixing tank for full stirring to form a reaction solution, which is fully Stir to form a reaction solution, adjust the pH value of the reaction solution to 6.8-7.0, control the temperature at about 40°C, and let it stand for defoaming to prepare a PFOS- and PFOA-free water-resistant film-forming foam fire extinguishing agent.

Embodiment 2

[0029] The composition of the fire extinguishing agent comprises 0.5% by weight of biological polysaccharide, 4.5% of fluorocarbon surfactant without PFOS and PFOA, 25% of combined hydrocarbon surfactant (alkyl glucoside 17%+cocamide propane base betaine 8%), antifreeze agent 32%, solubilizer 3% and water 35%; the biopolysaccharide is fully dissolved in pure water first, then mixed with other components and transferred to a stirring tank for sufficient stirring to form a reaction liquid. Adjust the pH value of the reaction solution to 6.8-7.0, control the temperature to about 40°C, and let it stand still to defoam, so as to prepare a PFOS- and PFOA-free water-resistant film-forming foam fire extinguishing agent.

Embodiment 3

[0031] The composition of the fire extinguishing agent comprises 0.8% by weight of biological polysaccharide, 4% of fluorocarbon surfactant without PFOS and PFOA, 21% of combined hydrocarbon surfactant (alkyl glucoside 15%+cocamidopropyl beet Alkali 6%), antifreeze agent 44%, solubilizer 4.2% and water 26%; the biological polysaccharide is fully dissolved in pure water first, then mixed with other components and transferred to the stirring tank for sufficient stirring to form a reaction liquid to adjust the reaction The pH value of the liquid is 6.8-7.0, the temperature is controlled at about 40°C, and the foam is defoamed by standing still to prepare a PFOS- and PFOA-free water-resistant film-forming foam fire extinguishing agent.

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Abstract

The invention provides a PFOS and PFOA-free insoluble aqueous film-forming foam extinguishing agent and a preparation method thereof. The agent comprises the following components in percentage by weight: 0.5-1% of biological polysaccharide, 2-5% of a fluorocarbon surfactant without PFOS and PFOA, 12-30% of a combined hydrocarbon surfactant, 20-50% of an anti-freezing agent, 3-5% of a solubilizer and 20-40% of water. The water-soluble film-forming foam extinguishing agent does not contain perfluorooctane sulfonic acid and perfluorooctanoic acid which are difficult to degrade, so that the water-soluble film-forming foam extinguishing agent has higher environmental friendliness, and the pollution to the environment is remarkably reduced; and by optimizing the components and the ratio, the excellent stability of the fire extinguishing agent is ensured at the same time.

Description

technical field [0001] The invention relates to the application field of fire extinguishing agents, in particular to a PFOS and PFOA-free water film-forming foam fire extinguishing agent and a preparation method. Background technique [0002] Aqueous film-forming foam fire extinguishing agent is a kind of foam fire extinguishing agent based on hydrocarbon surfactant and fluorocarbon surfactant, which can quickly flow and disperse on the surface of certain hydrocarbon liquids to form a layer of water film. The agent is widely used in various types of Class B fires. The anti-solvent aqueous film-forming foam fire extinguishing agent can also extinguish fires caused by alcohol, paint, alcohol, ester, ether, aldehyde, ketone, amine and other polar solvents and water-soluble substances. [0003] Perfluorooctanesulfonyl compounds (PFOS) and perfluorooctanoic acid (PFOA) are important perfluorinated surfactants, which have the characteristics of hydrophobic and oleophobic. Fluoroca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/02
CPCA62D1/0064A62D1/0071
Inventor 潘德顺徐友萍潘煜王钧奇刘海泉李勇
Owner 江苏锁龙消防科技股份有限公司
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