EP4093519A1 - Composition extinctrice - Google Patents
Composition extinctriceInfo
- Publication number
- EP4093519A1 EP4093519A1 EP21705592.0A EP21705592A EP4093519A1 EP 4093519 A1 EP4093519 A1 EP 4093519A1 EP 21705592 A EP21705592 A EP 21705592A EP 4093519 A1 EP4093519 A1 EP 4093519A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extinguishing
- composition
- content
- agent
- extinguishing composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
Definitions
- the invention relates to an extinguishing composition, that is to say a composition whose combustion generates an aerosol comprising particles capable of extinguishing a fire.
- Extinguishing compositions are known for example from document US2014 / 0041882 and contain an oxidant, a reducing agent as well as a phenol-formaldehyde resin.
- the phenol-formaldehyde resin must be kept cold to avoid its agglomeration, and the temperature during the processes for preparing the extinguishing compositions must not exceed 50 ° C because the resin risks liquefying if this temperature is exceeded.
- the resin can cause accelerated aging in contact with other components of the extinguishing composition, in particular in the presence of the reducing agent.
- the invention relates, according to a first of its aspects, to an extinguishing composition
- an extinguishing composition comprising:
- a dicyandiamide reducing agent present in a mass content of between 10% and 30%; an oxidizing agent alkali metal nitrate or alkaline earth metal nitrate, the oxidizing agent being present in a mass content of between 55% and 75%; and
- a cellulose resin present in a mass content of between 5% and 20%, the cellulose resin being chosen from carbohydrate derivatives or carbohydrate derivatives, such as polysaccharides.
- An extinguishing composition according to the invention is characterized by its ability to extinguish a fire, when it is placed in contact with the latter.
- the mass content of a compound in the extinguishing composition is defined as the ratio between the mass of said compound in the composition and the mass of the entire composition. The mass content is taken before combustion of the extinguishing composition.
- Dicyandiamide is a reducing compound derived from guanidine having a high nitrogen content, and of formula C 2 H 4 N 4 .
- alkali metal or alkaline earth metal designates all the elements of the first and second columns of the periodic table.
- the oxidizing agent can be chosen from sodium nitrate, potassium nitrate and strontium nitrate, or their mixtures.
- the oxidizing agent allows, by reacting with the cellulose resin, the production of particles comprising at least one alkali or alkaline earth metal.
- particles can be particles of alkali metal carbonate and / or alkali metal chloride, for example K 2 CO 3 and / or KCI.
- particles can also be particles of alkaline earth nitrate, for example of Sr (NO 3 ) 2 .
- an extinguishing composition in accordance with that described above is compatible with a preparation process by the dry route.
- the rate of particles generated by the combustion of a composition of the invention, as well as its ability to self-sustain combustion at low pressure makes the composition suitable for use as a composition. fire extinguisher.
- the use of a cellulose resin instead of a phenol-formaldehyde resin makes it possible to have an extinguishing composition having improved resistance to aging.
- the mass content of cellulose resin is between 8% and 15%.
- the oxidizing agent is potassium nitrate.
- Such a feature is advantageous because potassium nitrate is no longer commercially available.
- a composition according to the invention may further comprise an alkaline earth metal hydroxide endothermic agent, the endothermic agent being present in a mass content of less than or equal to 5%.
- the content by mass of endothermic agent is between 1.5% and 3%.
- the endothermic agent is magnesium hydroxide.
- the endothermic agent is a mixture of alkaline earth metal hydroxides such as, for example, a mixture of calcium hydroxide and magnesium hydroxide.
- Such an endothermic agent makes it possible to further improve the extinguishing capacities of an extinguishing composition of the invention, since its release makes it possible to lower the temperature of the fire and thus to inhibit it more effectively.
- the mass content of reducing agent is between 20% and 30%.
- this mass content of reducing agent makes it possible to further reduce the combustion temperature of the extinguishing composition.
- the content by mass of oxidizing agent is between 60% and 70%.
- the content by weight of reducing agent is between 20% and 30%, and the content by weight of oxidizing agent is between 60% and 70%.
- the invention relates to a fire extinguisher comprising a body containing a composition as defined above and an igniter capable of initiating combustion of the composition.
- the invention relates to a method of extinguishing a fire using the extinguisher described above and comprising the ignition of the composition by an igniter so as to generate an extinguisher aerosol, and the projection of this aerosol on the fire.
- Composition 1 corresponds to a composition outside the invention.
- compositions 2 and 3 are compositions according to the invention. Te corresponds to the combustion temperature and OB corresponds to the oxygen balance.
- Composition 2 differs from composition 1 only by the nature of the resin, the contents of each of the other components being identical.
- Composition 2 shows a higher combustion temperature Te and a lower particle rate than composition 1 but nevertheless remains suitable for use as an extinguishing composition. It has improved aging resistance compared to composition 1.
- Composition 3 has a cellulose resin content identical to that of composition 2, but the oxidizing agent and reducing agent contents are optimized. The latter make it possible to lower the combustion temperature and to increase the proportion of particles relative to composition 2, thus providing an extinguishing composition with properties similar to those of composition 1 outside the invention and which exhibits improved aging resistance.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2000603A FR3106344B1 (fr) | 2020-01-22 | 2020-01-22 | Composition extinctrice |
| PCT/FR2021/050106 WO2021148754A1 (fr) | 2020-01-22 | 2021-01-21 | Composition extinctrice |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4093519A1 true EP4093519A1 (fr) | 2022-11-30 |
| EP4093519B1 EP4093519B1 (fr) | 2025-08-27 |
Family
ID=70978052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21705592.0A Active EP4093519B1 (fr) | 2020-01-22 | 2021-01-21 | Composition extinctrice |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4093519B1 (fr) |
| FR (1) | FR3106344B1 (fr) |
| WO (1) | WO2021148754A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2316204A1 (fr) * | 1975-07-03 | 1977-01-28 | Poudres & Explosifs Ste Nale | Une composition pyrotechnique eclairante generatrice de gaz |
| NL2006236C2 (en) | 2011-02-17 | 2012-08-20 | Af X Systems B V | Fire-extinguishing composition. |
| CN107754198A (zh) * | 2016-08-21 | 2018-03-06 | 天津盛安消科科技有限公司 | 一种快速高效气溶胶灭火剂及制备方法 |
-
2020
- 2020-01-22 FR FR2000603A patent/FR3106344B1/fr active Active
-
2021
- 2021-01-21 WO PCT/FR2021/050106 patent/WO2021148754A1/fr not_active Ceased
- 2021-01-21 EP EP21705592.0A patent/EP4093519B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3106344A1 (fr) | 2021-07-23 |
| EP4093519B1 (fr) | 2025-08-27 |
| WO2021148754A1 (fr) | 2021-07-29 |
| FR3106344B1 (fr) | 2023-09-08 |
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