JPH04231978A - Antiphlogistic agent composition based on halgeno alkane - Google Patents

Abstract

PURPOSE: To obtain an antiflash agent composition which can be used for a perfect flooding method and a portable extinguisher. CONSTITUTION: An antiflash agent composition includes at least one kind of fluoroalkane, and at least one kind of hydrodienofluorohalogen alkane, instead of a conventional trifluorobromomethane and difluorobromchloromethane. The ozonosphere of the stratosphere can be prevented from disrupted, and the multiplier effect can be obtained.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION The present invention relates to a composition usable for fire extinguishing, and more particularly to a composition comprising at least one fluoroalkane and at least one hydrogenofluorohalogenoalkane. It is something.

0002

[Prior Art] In the field of fire extinguishing and extinguishing, chlorobromofluoroalkanes and bromofluoroalkanes are mainly used, particularly trifluorobromomethane, difluorochlorobromomethane and 1,1,2,2-tetrafluoro- 1,2-dibromoethane is used. These compounds have great anti-inflammatory effects and have extremely low toxicity to humans. These compounds are used especially for the protection of places where it is difficult to evacuate people. These compounds are also used in areas where electrical and electronic equipment is susceptible to corrosion (information rooms, telephone offices). However, these compounds are thought to be responsible for depleting the stratospheric ozone layer, which protects against certain radiation. The ozone layer depleting effect of these compounds ODP (ozo
depletion potential) is extremely high, as pointed out in the Montreal Resolution. This resolution builds on the recent international debate on environmental degradation and requires signatories to strive to reduce the production and consumption of these compounds.

0003

SUMMARY OF THE INVENTION An object of the present invention is to provide an anti-inflammatory composition that does not destroy the stratospheric ozone layer and can be used in place of these compounds that are harmful to the global environment.

0004

[Means for Solving the Problems] The anti-inflammatory composition provided by the present invention comprises the following group: (a) perfluoroalkane of the following formula (I): Ca F2a+b
(I) (where a is an integer from 1 to 6, and b
is 2 or 0) (b) hydrogenofluoroalkane of the following formula (II): Cn Hm Fp
(II) (Here, n is an integer from 1 to 6, m and p are integers greater than or equal to 1, and the sum of m+p is 2n or 2n
+2);
Hydrogenofluorohalogenoalkane of the following formula (III): Cq Hr Fw Clx Bry Iz
(III) [Here, q is 1 to 4
is an integer, r and w are integers greater than or equal to 1, x, y, and z are at least one integer that is not 0, and (r
+w+x+y+z) is 2q or 2q+2, and r
is less than or equal to the sum of (w+x+y+z)].

As examples of perfluoroalkanes of the above formula (I), mention may be made in particular of perfluoromethane, perfluoroethane, perfluoropropane, perfluoro-n-butane and perfluorocyclobutane. Among these compounds, perfluoroethane or perfluoropropane is particularly preferred. The above formula (
Examples of hydrogenofluoroalkane II) include in particular trifluoromethane, 1,1,1-trifluoroethane, 1,1,2-trifluoroethane, 1,1,1
, 2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, pentafluoroethane, 1,1,1,
3,3,3-hexafluoropropane, 1,1,1,2
,3,3,3-heptafluoropropane, 1,1,1,
2,2,3,3,4,4-nonafluorobutane, 1,1
, 2,2-tetrafluorocyclopropane and 1,1
, 2,2,3,4-hexafluorotranscyclobutane. Among the compounds of formula (II), those in which m is 1 or 2 are particularly preferred. This compound is particularly trifluoromethane, 1,1,1,2
,3,3,3-heptafluoropropane or 1,1,
Mention may be made of 1,3,3,3-hexafluoropropane. Examples of hydrogenofluorohalogenoalkane of formula (III) above include dichlorofluoromethane, bromodifluoromethane, chlorodifluoromethane, chlorofluoromethane, 2-chloro-1,1,1
,2-tetrafluoroethane, 1-chloro-1,1
, 2,2-tetrafluoroethane, 2,2-dichloro-
1,1,1-trifluoroethane, 2-chloro-1,
1,1-trifluoroethane, 1,1-dichloro-1
- Fluoroethane, 1-chloro-1,1-difluoroethane, 2-chloro-1,1,2-trifluoroethane, 1,1-dichloro-1,2-difluoroethane and 2-chloro-1,1,1- Mention may be made of trifluoropropane. The compound of formula (III) is preferably one in which r is smaller than the sum of (w+x+y+z), and among these compounds, difluorochloromethane, difluorobromomethane or 2-chloro-1,1,1,2 - Tetrafluoroethane.

The compositions of the present invention have the formula (I) and the formula (I
10% by volume or more, preferably 15 to 80% by volume of a fluoroalkane selected from the group consisting of compounds I)
Contains in the amount of. The composition of the present invention contains not more than 90% by volume of hydrogenofluorohalogenoalkane of formula (III);
Preferably, it is contained in an amount of 85 to 25% by volume.

Cup burner (Cup) of the composition of the present invention
Burner) value is low, thus indicating high anti-inflammatory power. In contrast, for example, trifluorobromomethane, currently the most widely used anti-inflammatory agent, has a cup burner value of 4.2%, but this compound is subject to regulation under the Montreal Resolution. The anti-inflammatory effect of the compositions of the invention was determined by the "cup burner" method. This method expresses the minimum percentage of fire extinguisher compound (measured by volume) in a mixture of air and fire extinguisher compound that is required to extinguish a burning flammable liquid. The lower this cup burner value, the more efficient the anti-inflammatory compound.

The advantage of the composition of the present invention is that it has a pseudo-synergistic effect (
pseudosynergies) and even true synergies (synergies). That is, a compound of formula (I) or formula (II) and a compound of formula
It has been found that at a certain ratio with the compound of (III), the cup burner value of the composition is lower than that of the most effective anti-inflammatory compound in the composition. The composition of the present invention does not have the effect of depleting the stratospheric ozone layer, its ODP is approximately 0, its toxicity to humans is extremely low, and it has little or no corrosivity. The compositions of the present invention can extinguish fires in the same manner as conventional trifluorobromomethane and difluorobromomethane. The compositions of the invention can therefore be used to provide localized protection in the so-called full-flood method in cases where the risk of fire is difficult to predict. Since the composition of the present invention can be pressurized using an inert gas such as nitrogen, the release rate can be increased. The composition of the invention can also be used in portable fire extinguishers. Examples of the present invention will be described below.

[0009]

[Example] Examples 1 to 3 2-chloro-1,1,1,2-tetrafluoroethane (HCFC 124) and perfluoroethane (FC
116) were prepared in the ratios shown in Table 1 below. The anti-inflammatory effect was measured by the cup burner method described in the ISO/DIS 7055-1 standard. Ethanol was used as the flammable liquid. ODP is defined as the ratio of the amount of reduction in the ozone layer when a unit mass of a certain substance is released and the amount of reduction in the ozone layer when trichlorofluoromethane is selected as a reference (ODP = 1). The numerical values shown in this example are from Lawrence Livermore National Laboratories (Lawrence Livermore National Laboratories).
Livermore National Labor
(1-D model). For example, the ODP of trifluorobromomethane is 1
0, and the ODP of 1,2-dibromo-1,1,2,2-tetrafluoroethane is 6. OD of a composition
P is equal to the sum of the contributions of each component in the composition. For example, 50% trifluorobromomethane and 50% 1,2-dibromo-1,1,2,2-tetrafluoroethane
The ODP of the composition containing 10 x 0.5 + 6 x 0.5 = 8 becomes 8. The results are shown in Table 1.

0010

[Table 1] *The anti-inflammatory effect of the composition is calculated assuming that the contribution of each component is equal to the addition. The results show that the composition of the invention exhibits a true synergistic phenomenon.

Examples 4 to 6 2-chloro-1,1,1,2-tetrafluoroethane (
HCFC 124) and perfluoroethane (FC
218) were prepared in the proportions shown in Table 2. The anti-inflammatory effect was measured using the same cup burner method as in the above examples. The results are shown in Table 2.

0012

Table 2 Examples 5 and 6 show true synergy, and Example 4 shows pseudo synergy.

Example 7 28% by volume of 2-chloro-1,1,1,2-tetrafluoroethane (HCFC 124) and 72% by volume of 1
,1,1,2,3,3,3-heptafluoropropane (
HFC 227e) was prepared. The results are shown in Table 3.

[0014]

[Table 3]

Examples 8 and 9 difluorochloromethane (HCFC 22)) and
Table 4 shows the composition with perfluoropropane (FC218).
It was prepared in the ratio of The results are shown in Table 4.

[0016]

[Table 4]

Examples 10-11 Compositions of bromodifluoromethane (22 B1) and perfluoropropane (FC 218) were prepared in the ratios shown in Table 5. The results are shown in Table 5.

[0018]

[Table 5]

Claims (8)

[Claims] Claim 1: The following group: (a) Perfluoroalkane of the following formula (I): C
a F2a+b
(I) (wherein a is an integer from 1 to 6 and b is 2 or 0) (b) Hydrogenofluoroalkane of the following formula (II): Cn Hm Fp
(II) (Here, n is an integer from 1 to 6, m and p are integers greater than or equal to 1, and the sum of m+p is 2n or 2n
+2);
Hydrogenofluorohalogenoalkane of the following formula (III): Cq Hr Fw Clx Bry Iz
(III) [Here, q is 1 to 4
is an integer, r and w are integers greater than or equal to 1, x, y, and z are at least one integer that is not 0, and (r
+w+x+y+z) is 2q or 2q+2, and r
is less than or equal to the sum of (w+x+y+z). 2. The anti-inflammatory agent according to claim 1, wherein the compound of formula (I) is perfluoroethane or perfluoropropane. 3. The anti-inflammatory agent according to claim 1, wherein the compound of formula (II) is trifluoromethane or 1,1,1,2,3,3,3-heptafluoropropane. 4. The compound of formula (III) is difluorochloromethane, difluorobromomethane or 2-chloro-1
, 1,1,2-tetrafluoroethane. Claim 1
An anti-inflammatory agent as described in . 5. Formula (I) or formula (II) in the composition.
The anti-inflammatory agent according to claim 1, containing 10% by volume or more of a fluoroalkane selected from the compounds. 6. An anti-inflammatory agent according to claim 5, wherein the amount of fluoroalkane selected from compounds of formula (I) or formula (II) ranges from 15 to 80% by volume. 7. The anti-inflammatory agent according to claim 1, wherein the composition contains 90% by volume or less of hydrogenofluorohalogenoalkane of formula (III). 8. The anti-inflammatory agent according to claim 7, wherein the amount of hydrogenofluorohalogenoalkane of formula (III) is in the range of 85 to 20% by volume.