JPS5944277A - Foam fire extinguishing agent for petroleum and polar organic solvent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foam extinguishing agent that can effectively extinguish fires caused by polar organic solvents such as petroleum and alcohol.

Conventionally, commonly used fire extinguishing foam has a protein hydrolyzate as its main component, and iron as well.

Protein foam fire extinguishing agents with metal salts such as zinc added as stabilizers, higher alcohol sulfates, bo-1-alkylene glycols or ester sulfates with higher alcohols as stabilizers, iso-)゛thylsial alcohol, ethylene glycol There are surfactant-based foam fire extinguishing agents containing pour point depressants such as phtyl cellosolve, and aqueous defoaming fire extinguishing agents whose main ingredient is fluorine-based surfactants.

These foam extinguishing agents are most effective against fires involving flammable liquids that are insoluble in water, such as gas oil, light oil, or heavy oil, but are effective against fires involving hydrophilic flammable liquids such as alcohols and ketones. The foam is extremely unstable and cannot be extinguished. For fires involving these hydrophilic and nonflammable liquids,
Using protein hydrolysates and synthetic surfactants as foaming agents,
A method of extinguishing fire by adding fatty acids and metal salts to form metal soap, a method of extinguishing fire by adding a polymer compound and forming a gel cloak on the combustion surface, and a method of extinguishing fire by adding a fluorine-based surfactant. There are chemicals available, but they only have an extinguishing effect on methanol (among alcohols) and acetone (among ketones); they have no extinguishing effect on fires caused by other polar organic solvents. During storage, deterioration such as precipitation occurs and the service life is short, and if the metal soap type is not foamed immediately after mixing with water, metal soap will form in the aqueous solution and no alarm will be issued. As a result, there are drawbacks such as a loss of fire extinguishing ability, and especially when seawater is used for dilution, this phenomenon is extremely severe and there is a drawback that the fire extinguishing effect is completely lost.

This invention was devised to solve the above-mentioned drawbacks, and uses a protein hydrolysis concentrate, a naphthalene sulfonic acid condensate, an acrylic acid-maleic anhydride copolymer, etc. as a foaming agent. By blending a water-soluble polymer resin, a fluorine-containing surfactant, and metal salts such as iron and aluminum in an appropriate ratio, it is effective against fires caused by petroleum and polar organic solvents. It is a foam fire extinguishing agent that is designed to generate long-lasting foam and exhibit a fire extinguishing effect.

The fire extinguishing foam of the present invention includes a) a protein hydrolysis concentrate of 5 to 50% by weight b) naphthalene sulfonic acid condensate, acrylic acid-maleic anhydride copolymer, alkenyl co-phosphoric anhydride, styrene-anhydride C) Propylene glycol alginate ester with a weight ratio of 5 to 30 selected from maleic acid copolymers.

0.5 to 5 weight ratio of polymer water-soluble resin such as sodium alginate, gum arabic, guarcam, etc. d) 1 to 10 weight ratio of at least one fluorine-containing surfactant neutralized with alkali or amine e) Water-soluble Inorganic and organic alkali metals, anodized/potassic earth metals, iron2. Specially made from aluminum salt.

The composition consists of at least two or more identified species in a proportion of 1 to 10% by weight.

In the above composition, condensates and copolymers such as naphthalene sulfonic acid condensates and acrylic acid-maleic anhydride copolymers are petroleum or polar organic This is to compensate for the lack of foam persistence on the solvent liquid surface, and by mixing these condensates and copolymers, it is possible to improve foaming properties and improve the durability of the generated flame. Demonstrate a synergistic effect. 'The fluorine-containing surfactant is (1) Ce F +t COOI-I (2) C
8F+7803H (4) C9F+9-04C00I-((6)
C6FI9COOI-1 (7) C3F17S02N(C21-15)CI-
12cOOI-1, I in formulas (1) to (7)
] is neutralized with an alkali or amine.

Alkali metals are hydrochlorides, sulfates, ocucates, and carbonates of alkali metals such as potassium, sodium, and lithium. ) (hydrochlorides, nitrates, and organic acid salts of lium, etc.).Salts of iron and aluminum include hydrochlorides, sulfates, and nitrates.

It is an organic acid salt.

Protein hydrolysis I used in this invention (using a condensate and a compound such as a naphthalene sulfonic acid condensate or an acrylic acid-maleic anhydride copolymer as a foaming agent, and using a polymeric water-soluble resin such as alginate propylene glycol ester) Foam fire extinguishing agents are made of foam stabilizers, fluorine-containing surfactants added to Kira to enhance the fire extinguishing effect, and stabilizers such as inorganic and organic metal salts.
It has a matte, fine-textured foam, is strong, is unaffected by denominations of salt, does not break easily, and does not easily disappear even on solvents.

Next, examples of the foam fire extinguishing agent of the present invention will be shown.

Example 1 Protein hydrolysis concentrate 30 weight ratio naphthalene sulfonic acid condensate 15 Alginate propylene glycol ester 2 Calcium lactate dihydrate 5 C3FI, C00K

5 Water
43 〃Example 2゜Protein hydrolysis M@condensate 40 Weight ratio Acrylic acid-maleic anhydride copolymer 10 〃Alginate propylene glycol ester 1 〃Calcium sulfate dihydrate 3 〃Pigiric chloride hexahydrate
3〃C3FI7SO31-1
10 Water
33 Example 3 Protein hydrolysis concentrate 20% by weight Alkenyl succinic anhydride 15 Gum arabic 5 Ferric chloride hexahydrate 5% by weight Zinc acetate
, //C8I"17802N(C2H5)CI-
I2COOK 5 #
water 48
Example 4 Protein hydrolysis concentrate 30% by weight styrene
Maleic anhydride copolymer 15 Gum arabic 2 Magnenium sulfate 7
Water salt 5 Calcium sulfate dihydrate 5
〃C9F+90-ri C00I-15,.

water 38
〃Example 5〃Protein hydrolysis concentrate 25 Weight ratio naphthalene sulfonic acid condensate 25〃Sodium alginate 5〃Sodium sulfate
5 〃Calcium chloride dihydrate 5 〃C9F1
．． C00K5 Water 30
〃Example 6゜Protein hydrolysis concentration o, 20 weight ratio weight lyacrylic acid maleic acid copolymer 15
〃Guar gum 5 〃Calcium chloride dihydrate 5 〃Aluminum lactate
5 Water
45 Next, a comparative example is shown.

Comparative example 1゜ (conventional petroleum fire extinguishing foam) Lauryl alcohol sulfate ester ammonium salt 15
Weight: Lauryl alcohol sulfate ester ethanolamine salt 15 Butyl glycol ether 1
5〃Lauryl alcohol 3〃Water
52
Comparative Example 2 (Conventional alcohol-resistant surfactant foam fire extinguisher) Lauryl dimethyl betaine 28% by weight Ethylene glycol 13% by weight Butyl alcohol
12〃Lauryl alcohol 5
〃Coconut oil fatty acid ammonium salt saline 20〃Water
22
[Extinguishing agents of Examples 1 to 6 and Comparative Example] Each of the extinguishing agents of Example 2 was tested by the following method.

1) Foamability and Foam Stability Test The foam nozzle used in this test was the standard foam nozzle for synthetic surfactant foam fire extinguishing agent test described in Ministry of Home Affairs Ordinance No. 26, and the discharge pressure was 7,0 (K9/cni). , discharge rate (stone/body) was used. The mixing method was a pre-mix method at a mixing rate of 6 tons, and the foaming ratio and 25 water flow time were measured.

The foaming ratio refers to how many times the volume of the mixed liquid is foamed, and is 2
5. Flowing water time refers to the time required for the water in the foam to dehydrate and for 25% of the foam to flow down.

2) Fire extinguishing test combustion tank has an area of 1.415m x 1.4157? Z＝
2m', depth 03m, and combustion liquid is 200m.
I put in A.

The extinguishing test was conducted with a pre-combustion time of 2 minutes and a foam release time of 5 minutes, and a re-ignition test was performed 15 minutes after the foam release. In the rekindling test, a square tube measuring 15 crn x 15 cm + 40 cm in height is inserted into the center of the combustion tank, the bubbles inside are removed, the combustion liquid level is exposed, and the tube is ignited. After burning for 30 seconds, remove the square cylinder and measure the burning area after 5 minutes. Measurement result 90
A value of 0c4 or less is considered good.

The results are shown in the table below.

In addition, in the reburning tests after extinguishing the fire in Examples 1 to 6, the surrounding foam sloshed on the combustion surface and no reburning occurred in any case.

As is clear from the following results, the fire extinguishing foam for petroleum and polar organic solvents of the present invention exhibits excellent foaming properties and foam stability even when diluted with fresh water and seawater, and is superior to petroleum and polar organic solvents. All of them have excellent extinguishing ability when extinguishing polar organic solvent fires. Furthermore, the fact that the foam quickly covers the burning surface and extinguishes the flame in the reflammation test indicates that the foam is stable on the solvent for a long time. In particular, while conventional alcohol-resistant foam fire extinguishers cannot extinguish fires caused by inbutanol or acetone, the foam fire extinguisher of this invention has the ability to extinguish any solvent, making it extremely useful. It can extinguish fires caused by any flammable liquid, and is 7'Z more effective than conventional fire extinguishing foam.

Patent applicant: Ninotan Co., Ltd.

Claims (1)

[Scope of Claims] a) Protein hydrolysis concentrate of 5 to 50 weight percent, b) Naphthalene sulfonic acid condensate, acrylic acid-maleic anhydride copolymer, alkenyl co-phosphoric anhydride, styrene-maleic anhydride 5 to 30% by weight of one selected from acid copolymers; C) alginate furopylene gellicol ester; 05 to 5 weight ratio of polymeric water-soluble resin such as sodium alkinate, gum arabic, guar gum, etc., d) 1 to 10q6 of at least one fluorine-containing surfactant neutralized with alkali or amine, e) Water-soluble inorganic and at least two or more selected from salts of organic alkali metals, alkaline earth metals, iron, and aluminum from 1 to 10% by weight a) to
A fire extinguishing foam for petroleum and polar organic solvents, characterized by comprising the composition of d).