阅读说明：本技术 水成膜泡沫灭火剂及其制备方法 (Aqueous film-forming foam extinguishing agent and preparation method thereof ) 是由 王晓 于 2021-07-01 设计创作，主要内容包括：本申请公开了一种水成膜泡沫灭火剂及其制备方法。本申请中,含氟表面活性剂、抗烧剂、碳氢表面活性剂、发泡剂和泡沫稳定剂；其中,所述含氟表面活性剂包含经氧化的式Ⅰ化合物作为活性成分。本发明所述的水成膜泡沫灭火剂中,含氟表面活性剂分子的绝对含量可以达到1％以下,成本低且环境污染小；本发明所述的水成膜泡沫灭火剂,相比市售的水成膜泡沫灭火剂表面张力更低,可以达到18达因/厘米以下；具有更优的灭活效果,灭活时间低至40～60秒；抗烧性能和发泡性能均更佳。(The application discloses an aqueous film-forming foam extinguishing agent and a preparation method thereof. In the present application, a fluorine-containing surfactant, an anti-burning agent, a hydrocarbon surfactant, a foaming agent and a foam stabilizer; wherein the fluorosurfactant comprises an oxidized compound of formula i as active ingredient. In the aqueous film-forming foam extinguishing agent, the absolute content of fluorine-containing surfactant molecules can reach below 1%, the cost is low, and the environmental pollution is small; compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent has lower surface tension which can reach below 18 dyne/cm; the inactivation time is as low as 40-60 seconds; the burning resistance and the foaming performance are better.)

1. An aqueous film-forming foam extinguishing agent is characterized in that the preparation raw materials of the aqueous film-forming foam extinguishing agent comprise: fluorine-containing surfactant, anti-burning agent, hydrocarbon surfactant, foaming agent and foam stabilizer; wherein the fluorosurfactant comprises as active ingredient an oxidized compound of formula i:

2. the aqueous film-forming foam fire extinguishing agent according to claim 1, wherein the preparation method of the aqueous film-forming foam fire extinguishing agent comprises the steps of:

(A) mixing and stirring an anti-burning agent, a hydrocarbon surfactant, a foaming agent and water to obtain a mixture;

(B) and adding a fluorine-containing surfactant and a foam stabilizer into the mixture, stirring and standing to obtain the aqueous film-forming foam extinguishing agent.

3. The aqueous film-forming foam fire extinguishing agent according to claim 2, wherein the aqueous film-forming foam fire extinguishing agent is prepared from the following raw materials:

wherein the fluorosurfactant comprises as active ingredient an oxidized compound of formula i:

4. the aqueous film-forming foam fire extinguishing agent according to any one of claims 1 to 3, wherein the fluorosurfactant is prepared by the following method:

and (2) mixing the compound shown in the formula I and diethylene glycol monobutyl ether, cooling to 0-10 ℃, dropwise adding hydrogen peroxide, and stirring to obtain the fluorine-containing surfactant.

5. The aqueous film-forming foam fire extinguishing agent according to claim 4, wherein the compound of formula I and the diethylene glycol monobutyl ether are mixed in a weight ratio of 1 (1-2);

and/or the weight ratio of the amount of the hydrogen peroxide to the amount of the compound in the formula I is 1 (7-15);

and/or the stirring time is not less than 10 hours.

6. The aqueous film-forming foam fire suppressant according to any one of claims 1 to 3, wherein the anti-burn agent is urea;

and/or the hydrocarbon surfactant is alkyl glycoside;

and/or the foam stabilizer is C_5～9Alcohol ethers of (1);

and/or the foaming agent is YM-309 (available from Shanghai rain Wood chemical Co., Ltd.).

7. The aqueous film-forming foam fire extinguishing agent according to claim 6, wherein C is_5～9The alcohol ether of (a) is ethylene glycol butyl ether.

8. A preparation method of an aqueous film-forming foam extinguishing agent is characterized by comprising the following steps:

(A) mixing and stirring an anti-burning agent, a hydrocarbon surfactant, a foaming agent and water to obtain a mixture;

(B) and adding a fluorine-containing surfactant and a foam stabilizer into the mixture, stirring and standing to obtain the aqueous film-forming foam extinguishing agent.

9. The method according to claim 8, characterized in that the method comprises in particular:

(A) dissolving 1-6 parts by weight of urea, 1-10 parts by weight of alkyl glycoside and 1-10 parts by weight of foaming agent in 74-96 parts by weight of water, and stirring to obtain a mixture;

(B) and adding 0.07-5 parts by weight of the fluorine-containing surfactant and 1-5 parts by weight of a foam stabilizer into the mixture, stirring, and standing to obtain the aqueous film-forming foam extinguishing agent.

10. The method according to claim 8, wherein in step (a), the stirring time is not less than 10 minutes;

and/or, in step (B), the stirring time is not less than 30 minutes;

and/or, in the step (B), the standing time is not less than 60 minutes.

Technical Field

The embodiment of the invention relates to the field of preparation of fire-fighting articles, in particular to an aqueous film-forming foam extinguishing agent and a preparation method thereof.

Background

The water film-forming foam fire-extinguishing agent is a kind of fire-extinguishing agent capable of effectively extinguishing non-polar solvent liquid fire, and when it is contacted with fuel in use, it can form a layer of water film on the top of the burning fuel, and can be spontaneously spread on the surface of the burning fuel, so that it can effectively prevent the fuel from being burned again, and can obtain the fire-extinguishing action. The film forming property of the water film forming fire extinguishing agent is that a fluorine-containing surfactant is added inside, so that the surface tension value of a solution is greatly reduced, and a layer of water-based film is spontaneously spread on the surface of a hydrocarbon liquid. However, the commonly used fluorine-containing surfactant in the prior art is perfluorooctane sulfonate (PFOS), which is considered as the most difficult-to-decompose organic pollutant and needs to be incinerated at high temperature to degrade, so that the fluorine-containing surfactant has high toxicity and is not beneficial to environmental protection. In recent years, fluorosurfactants have been developed in the direction of environmental friendliness, high surface activity, and low cost, and a novel fluorosurfactant having more excellent performance as a replacement for PFOS has been internationally sought.

The inventor finds that at least the following problems exist in the prior art: the water film-forming fire extinguishing agent prepared by the prior fluorine-containing surfactant for replacing PFOS has longer fire extinguishing time, and the preparation cost is higher because the dosage of the fluorine-containing surfactant is more than 5 percent and the fluorine-containing surfactant accounts for more than eight times of the total cost of the water film-forming foam fire extinguishing agent. Therefore, the development of an environment-friendly aqueous film-forming foam extinguishing agent with low fluorine-containing surfactant consumption and high extinguishing performance is particularly important.

Disclosure of Invention

The invention aims to provide an environment-friendly aqueous film-forming foam extinguishing agent with low usage of fluorine-containing surfactant and high extinguishing performance.

In order to solve the technical problems, the embodiment of the invention provides an aqueous film-forming foam extinguishing agent, which comprises a fluorine-containing surfactant, an anti-burning agent, a hydrocarbon surfactant, a foaming agent and a foam stabilizer; wherein the fluorosurfactant comprises as active ingredient an oxidized compound of formula i:

in some preferred embodiments, the method for preparing the aqueous film-forming fire foam comprises the following steps:

(A) mixing and stirring an anti-burning agent, a hydrocarbon surfactant, a foaming agent and water to obtain a mixture;

(B) and adding a fluorine-containing surfactant and a foam stabilizer into the mixture, stirring and standing to obtain the aqueous film-forming foam extinguishing agent.

In some preferred schemes, the preparation raw materials of the aqueous film-forming foam extinguishing agent comprise:

wherein the fluorosurfactant comprises as active ingredient an oxidized compound of formula i:

in some preferred embodiments, the hydrocarbon surfactant is an alkyl glycoside.

In some preferred embodiments, the foam stabilizer is C_5～9Alcohol ethers such as ethylene glycol butyl ether.

In some preferred embodiments, the foaming agent is YM-309 (available from Shanghai Ramaria chemical industries, Ltd.).

In some preferred embodiments, the anti-burn agent is urea.

In some preferred embodiments, the fluorosurfactant is prepared by the following method:

and (2) mixing the compound shown in the formula I and diethylene glycol monobutyl ether, cooling to 0-10 ℃, dropwise adding hydrogen peroxide, and stirring to obtain the fluorine-containing surfactant.

Preferably, the compound of formula I and the diethylene glycol monobutyl ether are mixed in a weight ratio of 1 (1-2), such as: 1:1.4.

Preferably, the weight ratio of the amount of the hydrogen peroxide to the amount of the compound in the formula I is 1 (7-15).

Preferably, the stirring is performed at 20 to 30 ℃.

Preferably, the stirring time is not less than 10 hours, more preferably not less than 15 hours, and still more preferably 20 hours.

In some preferred embodiments, the raw materials for preparing the aqueous film-forming fire foam also comprise conventional fire foam additives, such as antifreeze, cosolvent, preservative, chelating agent and/or thickener, etc.

Embodiments of the present invention also provide a method for preparing an aqueous film-forming foam fire suppressant, the method comprising the steps of:

(A) mixing and stirring urea, a hydrocarbon surfactant, a foaming agent and water to obtain a mixture;

(B) and adding the fluorine-containing surfactant and a foam stabilizer into the mixture, stirring and standing to obtain the aqueous film-forming foam extinguishing agent.

In some preferred embodiments, the method comprises the steps of: (A) dissolving 1-6 parts by weight of urea, 1-10 parts by weight of alkyl glycoside and 1-10 parts by weight of foaming agent in 74-96 parts by weight of water, and stirring to obtain a mixture;

(B) and adding 0.07-5 parts by weight of the fluorine-containing surfactant and 1-5 parts by weight of a foam stabilizer into the mixture, stirring, and standing to obtain the aqueous film-forming foam extinguishing agent.

In some preferred embodiments, the method comprises the steps of: (A) dissolving 3-6 parts by weight of urea, 3-10 parts by weight of alkyl glycoside and 3-6 parts by weight of foaming agent in 75-85 parts by weight of water, and stirring to obtain a mixture;

(B) and adding 1-3 parts by weight of the fluorine-containing surfactant and 1-3 parts by weight of a foam stabilizer into the mixture, stirring, and standing to obtain the aqueous film-forming foam extinguishing agent.

Preferably, in the step (a), the stirring time is not less than 10 minutes, and more preferably, the stirring time is 20 to 40 minutes, for example, 30 minutes.

Preferably, in the step (B), the stirring time is not less than 30 minutes, and more preferably, the stirring time is 40 to 80 minutes, for example, 60 minutes.

Preferably, in the step (B), the standing time is not less than 60 minutes, and more preferably, the standing time is 90 to 130 minutes, for example, 120 minutes.

Compared with the prior art, the embodiment of the invention has at least the following advantages:

(1) the raw and auxiliary materials used by the aqueous film-forming foam extinguishing agent are commercially available or industrialized raw materials, and are low in price and easy to obtain;

(2) in the aqueous film-forming foam extinguishing agent, the absolute content of fluorine-containing surfactant molecules can reach below 1%, the cost is low, and the environmental pollution is small;

(3) compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent has lower surface tension which can reach below 18 dyne/cm;

(4) compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent has a better inactivation effect, and the inactivation time is as low as 40-60 seconds;

(5) compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent disclosed by the invention is better in burning resistance and foaming performance.

It is to be understood that within the scope of the present invention, the above-described features of the present invention and those specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. Not to be reiterated herein, but to the extent of space.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention is further described below with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out under conventional conditions or conditions recommended by the manufacturers. Unless otherwise indicated, percentages and parts are percentages and parts by weight. The test materials and reagents used in the following examples are commercially available without specific reference.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and it is to be noted that the terms used herein are merely for describing particular embodiments and are not intended to limit example embodiments of the present application.

Unless otherwise indicated, the operations described in the examples herein were all performed at room temperature, which was 20-30 ℃.

Example 1

In a stirred tank, 1 part of N- (3- (dimethylamino) propyl) -2- ((3,3,4,4,5,5,6,6,7,7,8,8, 8-tridecafluorooctyl) mercapto) acetamide and 1.4 parts of diethylene glycol monobutyl ether are mixed uniformly and then cooled to 0-10 ℃. While maintaining this temperature, 0.13 part of hydrogen peroxide was added dropwise with stirring. After dropping, the mixture was stirred at room temperature for 24 hours. Standing until the bubbles are completely dissipated to obtain the fluorine-containing surfactant.

Example 2

In a stirred tank, 1 part of N- (3- (dimethylamino) propyl) -2- ((3,3,4,4,5,5,6,6,7,7,8,8, 8-tridecafluorooctyl) mercapto) acetamide and 1 part of diethylene glycol monobutyl ether are uniformly mixed, and then the temperature is reduced to 0-10 ℃. Maintaining the temperature, and dropwise adding 0.1 part of hydrogen peroxide while stirring. After dropping, the mixture was stirred at room temperature for 24 hours. Standing until the bubbles are completely dissipated to obtain the fluorine-containing surfactant.

Example 3

In a stirred tank, 1 part of N- (3- (dimethylamino) propyl) -2- ((3,3,4,4,5,5,6,6,7,7,8,8, 8-tridecafluorooctyl) mercapto) acetamide and 2 parts of diethylene glycol monobutyl ether are mixed uniformly and then cooled to 0-10 ℃. Maintaining the temperature, 0.07 part of hydrogen peroxide is added dropwise while stirring. After dropping, the mixture was stirred at room temperature for 24 hours. Standing until the bubbles are completely dissipated to obtain the fluorine-containing surfactant.

Example 4

80 parts of distilled water is added into a stirring kettle, and then 6 parts of urea is added into the kettle to be stirred and dissolved. Then 5 parts of alkyl glycoside activator APG (purchased from Yangzhou morning chemical) and 6 parts of foaming agent YM-309 (purchased from Shanghai Yumuu chemical) are added in sequence, and the stirring is continued for 30 minutes. 2 parts of the fluorine-containing activator obtained in example 1 was added thereto, and the mixture was stirred for 30 minutes. And finally, adding 1 part of ethylene glycol butyl ether, stirring for 1 hour, and standing for 2 hours to obtain the aqueous film-forming foam extinguishing agent.

Example 5

75 parts of distilled water is added into a stirring kettle, and then 8 parts of urea is added into the kettle to be stirred and dissolved. Then 3 parts of alkyl glycoside activator APG (purchased from Yangzhou morning chemical) and 8 parts of foaming agent YM-309 (purchased from Shanghai Yumuu chemical) are added in sequence, and the stirring is continued for 30 minutes. 3 parts of the fluorine-containing activator obtained in example 2 was added thereto, and the mixture was stirred for 30 minutes. And finally adding 3 parts of ethylene glycol butyl ether, stirring for 1 hour, and standing for 2 hours to obtain the aqueous film-forming foam extinguishing agent.

Example 6

82 parts of distilled water is added into a stirring kettle, and then 3 parts of urea is added into the kettle to be stirred and dissolved. Then 10 parts of alkyl glycoside activator APG (purchased from morning chemical of Yangzhou) and 3 parts of foaming agent YM-309 (purchased from chemical engineering of Shanghai Yumu) are added in sequence, and the stirring is continued for 30 minutes. 1 part of the fluorine-containing activator obtained in example 3 was added thereto, and the mixture was stirred for 30 minutes. And finally, adding 1 part of ethylene glycol butyl ether, stirring for 1 hour, and standing for 2 hours to obtain the aqueous film-forming foam extinguishing agent.

Test example

The aqueous film-forming foam fire extinguishing agents obtained in examples 4,5 and 6 were mixed with a commercially available high-end aqueous film-forming foam fire extinguishing agent (Dynax manufactured by the manufacturer; DX1025) and tested for main performance indexes such as surface tension, foaming times, inactivation time, burning resistance time and the like according to GB-15308 aqueous film-forming fire extinguishing test method, and the test results are shown in Table 1 below.

TABLE 1

From the test results of table 1 above, it can be obtained:

compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent has lower surface tension which can reach below 18 dyne/cm;

compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent has a better inactivation effect, and the inactivation time is as low as 40-60 seconds;

compared with the commercially available aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent disclosed by the invention is better in burning resistance and foaming performance.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.