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

A foam fire extinguishing agent and aqueous film-forming technology, applied in fire prevention equipment, etc., can solve the problems of 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 compound (PFOS) is an important perfluorinated surfactant with hydrophobic and oleophobic properties. Fluorocarbon surfactants commonly used in aqueous film-forming foam fire extinguishing agents have extremely strong persistence. It can ensure that the fire extinguishing agent has high stability 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 the protection of global environmental safety The solemn commitment made by my country has gradually increased the control of perfluorooctane sulfonic acid and its salt products and perfluorooctane sulfonyl fluoride products (PFOS products) that have been included in the list of persistent organic pollutants; and As practitioners in the fire protection industry, in accordance with the environmental protection requirements of the relevant industries, while strengthening management and risk prevention, start research on alternative technologies, phase out the use of such products in fire extinguishing agents, and minimize environmental pollution caused by products

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The composition of the fire extinguishing agent includes a combined hydrocarbon surfactant 15% (alkyl glycoside 10%+cocamidopropyl betaine 5%), PFOS-free fluorocarbon surfactant 2% (C 6 Fluorosurfactant 2%), foam stabilizer 5%, antifreeze agent 25%, solubilizer 4% and water 30%; first combine hydrocarbon surfactant 15% (alkyl glycoside 10% + cocamide Propyl betaine 5%) was fully dissolved in pure water to form component A; then 2% fluorocarbon surfactant without PFOS was added to component A and mixed to form component B; then, foam stabilizer 5%, 25% of antifreeze agent and 4% of solubilizer are mixed uniformly to form component C, and component C is slowly added to component B, and component C and component B are mixed uniformly and introduced into the stirring tank for sufficient stirring to form a reaction liquid , adjust the pH value of the reaction solution to 6.8-7.2, control the temperature to about 40° C., let stand to defoam, and prepare the PFOS-free aqueous ...

Embodiment 2

[0033] The composition of the fire extinguishing agent includes a combined hydrocarbon surfactant 23% (alkyl glycoside 17% + cocamidopropyl betaine 6%), PFOS-free fluorocarbon surfactant 4% (C 6 Fluorosurfactant 4%), foam stabilizer 7%, antifreeze agent 35%, solubilizer 3% and water 35%; first combine hydrocarbon surfactant 23% (alkyl glycoside 17% + cocamide Propyl betaine 6%) was fully dissolved in pure water to form component A; then 4% fluorocarbon surfactant without PFOS was added to component A and mixed to form component B; then, foam stabilizer 7%, 35% of antifreeze agent and 3% of solubilizer are uniformly mixed to form component C, and component C is slowly added to component B, and component C and component B are mixed and introduced into a stirring tank for sufficient stirring to form a reaction liquid, adjusting The pH value of the reaction solution is 6.8-7.0, the temperature is controlled at about 40° C., and the foam is defoamed by standing to prepare a PFOS-fr...

Embodiment 3

[0035] The composition of the fire extinguishing agent includes 30% by weight of combined hydrocarbon surfactant (15% alkyl glycoside + 15% cocamidopropyl betaine), 5% fluorocarbon surfactant without PFOS (C 6 Fluorosurfactant 4% and C 4fluorine-containing surfactant %), foam stabilizer 8%, antifreeze agent 50%, solubilizer 4.5% and water 40%; Base betaine 15%) was fully dissolved in pure water to form component A; then 5% of PFOS-free fluorocarbon surfactant was added to component A and mixed to form component B; then, foam stabilizer 8%, anti- Mix 50% of the freezing agent and 4.5% of the solubilizer to form component C, and slowly add component C to component B. After mixing component C and component B, import it into a stirring tank for sufficient stirring to form a reaction solution. Adjust The pH value of the reaction solution is 6.7-7.0, the temperature is controlled at about 40° C., and the foam is defoamed by standing to prepare a PFOS-free aqueous film-forming foam ...

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Abstract

The invention provides a PFOS-free aqueous film-forming foam extinguishing agent and a preparation method thereof. The PFOS-free aqueous film-forming foam extinguishing agent comprises the following components in percentage by weight: 12-30% of a combined hydrocarbon surfactant, 2-5% of a PFOS-free fluorocarbon surfactant, 5-8% of a foam stabilizer, 20-50% of an antifreeze agent, 3-5% of a solubilizer and 20-40% of water. The aqueous film-forming foam extinguishing agent disclosed by the invention does not contain perfluorooctane sulfonate which is difficult to degrade, so that the aqueous 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-free aqueous film-forming foam fire extinguishing agent and a preparation method thereof. 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. Agents are widely used in various types of Class B fires. [0003] Perfluorooctanesulfonyl compound (PFOS) is an important perfluorinated surfactant with hydrophobic and oleophobic properties. Fluorocarbon surfactants commonly used in aqueous film-forming foam fire extinguishing agents have extremely strong persistence. It can ensure that the fire extinguishing agent has high stability in many environments; however, the degradation performance of this fluorocarbon surfacta...

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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