JPH08325587A - Flame-retardant fluid - Google Patents

Abstract

PURPOSE: To obtain a flame-retardant fluid containing a foamable substance generating an inactive gas in foaming, capable of releasing the inactive gas in exposure to high temperature to prevent the generation of fire, not requiring the maintenance of water content, easy in handling and waste water treatment, and useful for lubricating oils, hydraulic oils, etc. CONSTITUTION: A flame-retardant fluid comprises a foaming substance e.g. a compound of formula I [A is a direct bond, a divalent 1-22C hydrocarbon group; R<1> , R<2> are H, a 1-22C hydrocabon group, a group of formula: -CH(R<3> )NR<4> R<5> (R<3> to R<5> are R<1> , and R<4> and R<5> are simultaneously not H; R<4> and R<5> may be bound to each other to form a ring)] generating an inactive gas in foaming a compound of formula II [R<6> is H, a 1-22C hydrocarbon group; R<7> is R<6> , a group of formula: -CH(R<8> )NR<9> R<10> (R<8> to R<10> are R<6> ; R<6> and R<8> , and R<9> and R<10> are simultaneously not H; R<9> and R<10> may be bound to each other to form a ring); R<6> and R<7> may be bound to form a ring], a halogenated nonflammable solvent, an inorganic foaming agent} in a liquid state or a semi-solid state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant fluid, and more specifically, it releases an inert gas when exposed to high temperatures to prevent a fire from occurring, and requires no water management and is handled. And waste liquid treatment are easy, such as lubricating oil, hydraulic oil,
The present invention relates to a flame-retardant fluid suitably used as cutting oil, cleaning oil, processing oil, heat treatment oil, grease and the like.

[0002]

2. Description of the Related Art At present, the industry is regulated by the Fire Service Law for the purpose of fire prevention. For example, many lubricating oils are classified as Class 4 hazardous materials, and the handling method corresponding to the handling location is strictly specified. The fire department also instructs each building to use flame retardant lubricants. Therefore, as the flame-retardant oil, for example, chlorine-based oil, fluorine-based oil, phosphate ester oil,
Fatty acid ester oils and hydrous oils have been developed. Among these, some halogen-based oils and water-containing oils do not have a flash point in the Class 4 flash point measurement test according to the Fire Service Act, and are equivalent to non-dangerous substances that are not regulated by the Fire Service Act. . In particular, water-containing oil is highly safe against fires and does not require ancillary equipment for regulation, so the demand for it is increasing. Water-containing oils are roughly classified into emulsion type WO type (emulsifying type, solubilizing type), OW type, and water glycol type, but problems common to these are lubrication performance and water evaporation. That is, since it contains water, the lubricity is unavoidably deteriorated, and after water is evaporated, it becomes a non-flammable oil and a dangerous substance. Therefore, it is necessary to control the water content, which requires extra labor and cost. Further, the water glycol system has a large amount of COD (chemical oxygen demand) in wastewater, and therefore has a problem that a large amount of cost is required for wastewater treatment.

[0003]

Under such circumstances, the present invention releases an inert gas when exposed to a high temperature to prevent the occurrence of a fire, requires no water management, and is easy to handle and handle. It is an object of the present invention to provide a flame-retardant fluid that can be easily treated as a waste liquid.

[0004]

DISCLOSURE OF THE INVENTION As a result of intensive studies to develop a flame-retardant fluid having the above-mentioned preferable properties, the present inventors have found that a foamable substance, particularly preferably a base oil and a foamable substance, can be used. It has been found that a liquid or semi-solid fluid containing a substance, which decomposes or evaporates when exposed to high temperatures to generate an inert gas, may be suitable for that purpose. The present invention has been completed based on such findings. That is, the present invention provides a liquid or semi-solid flame-retardant fluid containing a foaming substance that generates an inert gas during foaming. A particularly preferred embodiment of the present invention is a semisolid flame-retardant fluid such as liquid or grease containing a base oil and a foaming substance that generates an inert gas during foaming. The flame-retardant fluid of the present invention contains a foaming substance, and may be in a liquid state or a semi-solid state. The foaming initiation temperature of the fluid is higher than the use temperature, preferably 10 ° C, more preferably 20 ° C or higher, and lower than the flash point of the flammable component in the fluid, preferably 10 ° C. More preferably, the temperature is 20 ° C. or more lower. If the foaming start temperature is close to the use temperature, the foamable substance may be decomposed during use, and in the unlikely event, the ignition preventing function due to the foaming gas may not be sufficiently exerted. Further, if the foaming start temperature is equal to or higher than the flash point of the combustible component in the fluid, there is a risk of ignition before foaming in the case of emergency, so that the object of the present invention cannot be sufficiently achieved. The term "use temperature" as used in the present specification refers to the maximum oil temperature including the fluctuation range in the case of normally using the lubricating oil, etc. To do. In the present invention, the kinematic viscosity of the liquid fluid at 100 ° C. is not particularly limited, but is generally 1 to 50 cSt, preferably 1 to 30.
It is cSt.

In the flame-retardant fluid of the present invention, if the foamable substance itself is a liquid or semi-solid fluid, it may not be necessary to use a base oil together depending on the application. Examples of such liquid or semi-solid foamable substances include common foaming agents (often solid)
Examples thereof include those modified with alkylation and the like. In addition, it is desirable that the thermal decomposition temperature of this product does not correspond to Class 5 of dangerous substances. The flame-retardant fluid of the present invention is particularly preferably one containing a base oil and a foaming substance. In this case, as the base oil, a liquid or semi-solid substance other than water that can dissolve or uniformly disperse the foamable substance is used. Examples of the base oil include general mineral oil, solvent, synthetic lubricating oil and the like. Examples of synthetic lubricating oils include poly-α-olefin (PAO) -based oils, polyalkylene glycol (PAG) -based oils, phosphate ester-based oils,
Silicone oil, silicate ester oil, alkyl aromatic oil, carbonate ester oil, carbamate oil, fatty acid ester oil (mono, diester, polyol ester,
Alkyl or aralkyl ester oils, etc.), nitrogen-containing oils, halogen-containing oils and the like. From the viewpoint of handling and other aspects, it is preferable that the base oil is composed of elements such as C, H, O and N. Preferred examples of such base oils include mono-, di-, tri-esters of trimethylolpropane and oleic acid, isostearic acid or isooctylic acid, pentaerythritol and hexanoic acid or 3,5,5-trimethylhexane. Mono-, di-, tri-, tetra-esters with acids, mono-, di-, tri-, tetra-, penta-, hexa-esters with dipentaerythritol and hexanoic acid or nonanoic acid, mixtures thereof, etc. Is mentioned. These base oils may be used alone or in combination of two or more.

The foamable substance used in the flame-retardant fluid of the present invention is one that generates an inert gas during foaming and has a foaming initiation temperature lower than the flash point of the combustible component in the fluid. Well, it is not particularly limited and various ones can be used. The inert gas generated is preferably nitrogen, carbon dioxide, steam or the like.
Examples of such foaming substances include triazine-based compounds, hydrazine-based compounds, tetrazole-based compounds, azo-based compounds, halogen-based (nonflammable) solvents, inorganic foaming agents, and compounds containing water of crystallization. Examples of the triazine-based compound include trihydrazinotriazine, and examples of the hydrazine-based compound include p,
p'-oxybis (benzenesulfonyl hydrazide),
Examples thereof include p-toluenesulfonyl hydrazide and p-toluenesulfonyl semicarbazide. Further, as the tetrazole compound, general formulas (II), (III) and (IV)

[0007]

Embedded image

The compound represented by
it can. A in the general formula (II) is a direct bond or charcoal.
A divalent hydrocarbon group having a prime number of 1 to 22 is shown. Where carbon
Examples of the divalent hydrocarbon group having 1 to 22 include the number of carbon atoms.
1 to 22 alkylene group, 2 to 22 carbon alkenile
Group, arylene group having 6 to 22 carbon atoms, 7 to 22 carbon atoms
Alkylarylene group or aralkyl having 7 to 22 carbon atoms
Examples thereof include a len group. As an example of something like this
Is a methylene group, ethylene group, propylene group, vinylene
Group, phenylene group, tolylene group, benzylene group, etc.
You can In addition, R in the general formula (II)¹And R
²Are a hydrogen atom and a carbon-hydrogen group having 1 to 22 carbon atoms, respectively.
Or -CH (R³) NR^FourR^Five(R³, R ^FourAnd R
^FiveAre each a hydrogen atom or a hydrocarbon having 1 to 22 carbon atoms.
Represents a group, which may be the same or different
I, R^FourAnd R^FiveAre not hydrogen atoms at the same time, and R^Four
And R^FiveMay be linked to each other to form a ring structure
Yes. ), They are the same or different
Even if they are linked together to form a ring structure
Good.

In the general formula (III), R ⁶ is a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, R ⁷ is a hydrogen atom, a hydrocarbon group having 1 to 22 carbon atoms or --CH (R ⁸ ) NR ⁹ R
¹⁰ (R ⁸ , R ⁹ and R ¹⁰ each represent a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, and although they may be the same or different, R ⁶ and R ⁸ and R ⁹ R
¹⁰ is not a hydrogen atom at the same time, and R ⁹ and R ¹⁰ may combine with each other to form a ring structure. ), R ⁶ and R ⁷ may combine with each other to form a ring structure.
Further, R ^{11 to} R ¹⁵ in the general formula (IV) each represents a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, which may be the same or different from each other, and are bonded to each other to form a ring. It may form a structure. In the above general formulas (II) to (IV), examples of the hydrocarbon group having 1 to 22 carbon atoms include an alkyl group having 1 to 22 carbon atoms and 2 carbon atoms.
~ 22 alkenyl groups, C6-22 aryl groups,
Alkylaryl group having 7 to 22 carbon atoms or 7 to 2 carbon atoms
2 aralkyl groups and the like. Examples of such groups include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-
Examples thereof include butyl group, t-butyl group, pentyl group, hexyl group, octyl group, cyclohexyl group, vinyl group, allyl group, phenyl group, tolyl group, and benzyl group.

Examples of the compound represented by the above general formula (II) include 5,5'-bis-1H-tetrazole; 1,
1'-dimethyl-5,5'-bis-1H-tetrazole;1,1'-diisooctyl-5,5'-bis-1H
Examples of the compound represented by the general formula (III) include tetrazole and 1-phenyl-1H-
Tetrazole, 5-phenyl-1H-tetrazole, 1
Examples of the compound represented by the general formula (IV) include-(2-ethylhexyl) 1H-tetrazole and 1-oleyl-5-methyl-1H-tetrazole. For example, N, N-bis [(1-tetrazolyl) methyl ] -N- (5-tetozolyl) amine etc. are mentioned. Next, as the azo compound, for example, azobisisobutylnitrile, barium azodicarboxylate and the general formula (V)

[0011]

[Chemical 6]

Examples include azodicarbonamides represented by In the general formula (V), R ^{16 to} R ^16
19 each represents a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, which may be the same or different from each other, or may be bonded to each other to form a ring structure. Here, the hydrocarbon group having 1 to 22 carbon atoms is the same as that described in the tetrazole compound of the general formulas (II) to (IV). Examples of the compound represented by the general formula (V) include azodicarbonamide. As the halogen-based solvent, for example, HCFC
123 (1,1-dichloro-2,2,2-trifluoroethane), HCFC141b (1,1-dichloro-1-)
Fluoroethane), HFC338 (octafluorobutane), HFC347 (heptafluorobutane), HCF
C225 (dichloropentafluoropropane), octafluoropentanol, dodecafluoroheptanol,
Hexadecafluorononanol, tetrafluoro-1,
2-diiodoethane, octafluoro-1,4, -diiodobutane, perfluorobutyl iodide, perfluoroheptyl iodide, octafluoropentyl iodide and the like can be mentioned. Furthermore, examples of the inorganic foaming agent include sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium phosphate, ammonium carbonate, ammonium hydrogen carbonate, sodium carbonate, potassium carbonate, sodium azide, and the like. , 5,5′-bis-1H-tetrazole dihydrate and the like. Among these foaming substances, from the viewpoint of safety and effect of handling in preparing a flame-retardant fluid, the tetrazole compound represented by the general formula (II) to (IV), the general formula Azodicarbonamides represented by (V), halogen-based solvents and inorganic foaming agents (particularly sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium phosphate, ammonium carbonate, ammonium hydrogen carbonate, sodium carbonate, potassium carbonate) are preferable. is there. These foaming substances may be used alone or in combination of two or more.

The amount of the foamable substance added to the flame-retardant fluid of the present invention varies depending on its type, but it is desirable to control the degree of foaming to such an extent that it does not fall under Class 5 hazardous materials. The amount that does not fall under Class 5 of this dangerous substance can be calculated back from the results of the thermal analysis test. That is, according to the method stipulated by the Fire Service Law, the logarithm of each of the calorific values multiplied by 0.7 and 0.8 and the respective heat generation are used with 2,4-dinitrotoluene and benzoyl peroxide as reference substances. The logarithm of the temperature obtained by subtracting 25 ° C. from the starting temperature is taken, and the former is plotted on the vertical axis and the latter is plotted on the horizontal axis. Next, take the logarithm of the calorific value of the sample and the logarithm of the value obtained by subtracting 25 ° C from the exothermic onset temperature, and if the plot is on the line connecting the points of the reference substance or in the region above it, the dangerous substances category 5 Will be applicable. Therefore, if the exothermic level is smaller than that, it does not correspond to the fifth category in the thermal analysis. Since the value of the reference substance is fixed,
Formula logQ <0.6679 × log (T ₀ -25) +1.13
2 is introduced. Here, Q is the total calorific value (cal / g), T ₀
Is the heat generation start temperature (° C). Assuming that the calorific value other than the foamable substance is a negligible amount with respect to the foamable substance, the addition amount of the foamable substance can be calculated back from the formula Q = Q ₀ × W × 10 ^-2 . Where Q ₀ is the calorific value of the foamable substance,
W is the addition amount (% by weight) of the foamable substance. That is,
The flame-retardant fluid of the present invention satisfies the relationship of formula (VI) log (Q ₀ × W × 10 ^-2 ) <0.6679 × log (T ₀ -25) +1.132 (VI). Is desirable. The amount of addition of the foamable substance that decomposes violently can be suppressed, and the amount of the generated gas with a small amount of gas can be appropriately increased, and foaming can be controlled by adding a new foaming substance.

Furthermore, in the flame-retardant fluid of the present invention, the relationship of the formula (I) theoretical average number of moles of inert gas / theoretical average number of moles of all generated gas ≧ 0.3 (I) It is desirable to meet. In the above formula (I),
The theoretical average number of moles of the generated inert gas means the number of generated moles of the inert gas when the foamable substance contained in the flame-retardant fluid is completely decomposed or evaporated. For example, when 2 mol of the inert gas is released from 1 mol of the foamable substance, the theoretical average number of moles of the generated inert gas is calculated as 2 mol.
In the case of a nonflammable solvent, the value obtained by dividing the weight by the molecular weight is the theoretical average number of moles of generated inert gas. On the other hand, the theoretical average number of moles of all generated gas means the number of moles assuming that components other than the foamable substance in the flame-retardant fluid have completely evaporated, and the foamable substance decomposes or evaporates. Gas (inert gas + other gas) with the number of moles. That is, in the present invention, it is desirable that the total amount of generated gas contains 30 mol% or more of the inert gas, which makes ignition difficult. In addition, in the flame-retardant fluid of the present invention, the content of water (including water of crystallization) is preferably 5% by weight or less. If the water content exceeds 5% by weight, the fluid may not sufficiently exhibit desired properties such as lubricity, which is not preferable. Therefore, when a compound containing water of crystallization is used as the foaming substance, it is advantageous to add water so that the water content (including water of crystallization) in the fluid is 5% by weight or less.

In the flame-retardant fluid of the present invention, in order to dissolve or uniformly disperse the foamable substance, a surfactant or a dispersant can be added if necessary. here,
Examples of the surfactant include fatty acid soap, naphthenic acid soap, long-chain alcohol sulfate ester salt, secondary alcohol sulfate ester salt, fatty acid ethylene glycoside sulfate ester salt, polyoxyethylene alkyl ether sulfate ester salt, polyoxyethylene alkylphenyl ester. Ether sulfate, fatty acid polyhydric alcohol sulfate.
Fatty acid alkyl sulfate ester salt, fatty acid amide sulfate ester salt, fatty acid monoalkanolamide sulfate ester salt, alkane sulfonate, petroleum sulfonate, sulfo fatty acid salt, mono- or dialkyl sulfosuccinate, alkyl naphthalene sulfonate. Anionic surface active agents such as alkylphenol sulfonates, long-chain primary amine salts, alkyl-di or trimethylammonium salts, alkylpyridinium sulfates, fatty acid polyethylene polyamides, fatty acid triethanolamine, alkyl imidazolines, polyoxyethylene alkylamines , N-alkyl propylene diamine, long-chain amine oxide and other cationic surfactants, alkyl betaine, N-alkyl taurine salt and other amphoteric surfactants, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxy Nonionic surfactants such as ethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyhydric alcohol fatty acid ester

As the dispersant, for example, metal compounds such as sulfonate, phenate, salicylate and phosphonate, ashless compounds such as succinimide, benzylamine, succinic acid ester, copolymeric polymer and the like can be used. . In addition, additives such as an antioxidant, an extreme pressure agent, a rust preventive, and a viscosity index improver may be appropriately added to the flame-retardant fluid of the present invention depending on the purpose of use. Examples of the antioxidant include 2,6-di-t-butyl-4-methylphenol; 4,4'-methylenebis (2,6-di-t-butylphenol); 2,2'-methylenebis (4- Methyl-6-t-butylphenol); pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate]; pentaerythritol tetrakis (β-laurylthiopropionate); 2,2 '-Thiobis [ethyl 3- (3,5
-Di-t-butyl-4-hydroxyphenyl) propionate]; 2,4-bis (octylthio) -6- (4-
Hydroxy-3,5-di-t-butylanilino) -1,
Phenolic antioxidants such as 3,5-triazine, phenyl-1-naphthylamine, phenyl-2-naphthylamine, phenothiazines, amine antioxidants such as monooctyldiphenylamine, alkyl disulfides,
Examples thereof include sulfur antioxidants such as benzothiazole, and zinc dialkyldithiophosphate.

Examples of extreme pressure agents include zinc dialkyldithiophosphate, dialkyl polysulfides, triaryl phosphates and trialkyl phosphates, and examples of rust inhibitors include alkyl or alkenyl succinic acid, sorbitan monooleate and pentaerythritol. Mono or dioleate, amine phosphate,
Benzotriazole and the like, as the viscosity index improver,
For example, polymethacrylate, olefin-based copolymer (for example, ethylene-propylene-based copolymer, etc.), styrene-based copolymer (for example, styrene-diene hydrogenated copolymer, etc.) and the like can be mentioned.

The flame-retardant fluid of the present invention fulfills the conventional function under normal use conditions, and when exposed to a high temperature such as during a fire, it produces an inert gas and ignites. It has a function to prevent self-extinguishing even when ignited due to the inert gas.
Furthermore, since water is not used substantially, it does not require time and effort to control the water content unlike water-containing oils, has good lubricating performance, and is easy to treat wastewater. The flame-retardant fluid of the present invention is suitably used as, for example, lubricating oil, hydraulic oil, cutting oil, processing oil, cleaning oil, heat treatment oil, electric insulating oil, grease and the like.

[0019]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The fluid was subjected to a thermal analysis test and a pressure vessel test, and a flammability confirmation test according to the methods for confirming dangerous goods category 5 of the Fire Service Act, as follows. (1) Thermal analysis test Using a differential scanning calorimeter, the exothermic starting temperature and exothermic amount of two types of reference substances (2,4-dinitrotoluene and benzoyl peroxide) were determined. The temperature rising rate was 10 ° C./min. Take the logarithm of the value obtained by subtracting 25 ° C from the exothermic onset temperature (horizontal axis), and multiply it by the calorific value (0.7 for 2,4-dinitrotoluene, 0.7 for benzoyl peroxide). The logarithm (vertical axis) of (multiplied by 8) was plotted to create a reference line. Next, the heat generation start temperature and heat generation amount of the sample are measured, and the logarithm of the value obtained by subtracting 25 ° C from the heat generation start temperature and the logarithm of the heat generation amount are obtained and plotted, and those below the reference line are regarded as no risk. It was measured.

(2) Pressure vessel test An aluminum sample vessel with an open top (inner diameter of about 30 mm,
Put a measurement sample of 5g into a height of about 50 mm and a thickness of about 0.4 mm, and make a burst plate made of aluminum (burst pressure 6 kgf / c).
m ² ) was set, and this was placed in a device in which an orifice plate having a thickness of 2 mm and a pore diameter of 1.0 mm was attached to a stainless steel pressure vessel having an internal volume of 200 cm ³ , and heating and measurement were performed. What was ruptured 5 times or more out of 10 measurements was judged to be dangerous. (3) Flammability Confirmation Test 6 ml of the sample was placed in a magnetic evaporation dish having an inner diameter of 50 mm and a depth of 5 mm, and a burner flame was applied from an angle of 45 degrees. Burner is gas torch (LPG fuel, flame temperature 190
(0 ℃), the length of the flame is unified to 10 cm,
cm was made to hit the center of the liquid surface. After the flame was applied to the liquid surface, the time from ignition to ignition and the flame for 5 seconds after ignition was continued, and then the time for continuous combustion after removing the flame was measured. When the time required for ignition was extended for 15 seconds or more, it was determined that it was difficult to ignite, and when the continuous combustion time was within 5 seconds, it was determined to be self-extinguishing.

The meanings of the symbols of the respective components are as follows. PEG (# 400): Polyethylene glycol (# 40
0) PE-1: trimethylolpropane (di, tri) (oleate, isostearate) mixture PE-2: pentaerythritol tetra (hexanoate, 3,5,5-trimethylhexanoate) mixture PE-3: dipenta Erythritol hexa (hexanoate, nonanoate) mixture PE-4: trimethylolpropane tri (isooctylate, isostearate) mixture Tween 85: sorbitan trioleate polyoxyethylene ether (ethylene oxide average addition mole number 2
0) PEGMOE (7): Polyethylene glycol monooleyl ether (ethylene oxide average added mole number 7) POESTO (30): Polyoxyethylene sorbite tetraoleate (ethylene oxide average added mole number 3)
0) Span 20: sorbitan monolaurate PEGNPE (15): polyethylene glycol nonyl phenyl ether (average number of moles of ethylene oxide added: 1)
5) SDOSS: diisooctyl sodium sulfosuccinate (2.5 wt% water) BHT: 5,5'-bis -1H- tetrazole _{BHT · 2H 2 O: BHT ·} 2 hydrate 1PHT: 1- phenyl -1H- Tetrazole P5T: 5-phenyl-1H-tetrazole 1EHT: 1- (2-ethylhexyl) -1H-tetrazole 1EH5MT: 1- (2-ethylhexyl) -5-methyl-1H-tetrazole 1OLT: 1-oleyl-1H-tetrazole 1OL5MT : 1-oleyl-5-methyl-1H-tetrazole ADCA: azodicarbonamide OBSH: p, p'-oxybis (benzenesulfonylhydrazide) HCFC225: dichloropentafluoropropane 8F5OH: octafluoropentanol 12F7OH: dodecafluor Heptanol 16F9OH: hexadecafluorovanadyl nonanol C2F4I2: as tetrafluoro-1,2-diiodoethane Examples 1-8 base oil, polyethylene glycol # 400 [PEG
(# 400)] was used to prepare a flame-retardant fluid having the composition shown in Table 1, and its performance was evaluated. The results are shown in Table 2.

[0022]

[Table 1]

[0023]

[Table 2]

Note 1) Inert gas (mol%) = (theoretical average number of moles of generated inert gas / theoretical average number of moles of all generated gas) × 100 The fluids of the present invention have improved flame retardancy. It turns out that it is effective in making it. Examples 9 to 26 Trimethylolpropane (di, tri) (oleate, isostearate) (PE-1) was used as a base oil to prepare flame-retardant fluids having the composition shown in Table 3, and The performance was evaluated. The results are shown in Table 4.

[0025]

[Table 3]

[0026]

[Table 4]

Note 1) Same as footnote in Table 2. It can be seen that any of the fluids of the present invention is effective in improving flame retardancy. Examples 27 to 36 As a base oil, pentaerythritol tetra (hexanoate, 3,5,5-trimethylhexanoate) (PE
-2) was used to prepare a flame-retardant fluid having the composition shown in Table 5, and its performance was evaluated. The results are shown in Table 6.

[0028]

[Table 5]

[0029]

[Table 6]

Note 1) Same as footnote in Table 2. It can be seen that any of the fluids of the present invention is effective in improving flame retardancy. Examples 37 to 42 Dipentaerythritol hexa (hexanoate, nonanoate) (PE-3) was used as a base oil, and a flame-retardant fluid having a composition shown in Table 7 was prepared and its performance was evaluated. The results are shown in Table 8.

[0031]

[Table 7]

[0032]

[Table 8]

Note 1) Same as footnote in Table 2. It can be seen that any of the fluids of the present invention is effective in improving flame retardancy. Examples 43 to 52 Trimethylolpropane tri (isooctylate, isostearate) (PE-4) was used as the base oil, and the ninth oil was used.
A flame-retardant fluid having the composition shown in the table was prepared and its performance was evaluated. The results are shown in Table 10.

[0034]

[Table 9]

[0035]

[Table 10]

Note 1) Same as footnote in Table 2. It can be seen that any of the fluids of the present invention is effective in improving flame retardancy.

[0037]

EFFECTS OF THE INVENTION The flame-retardant fluid of the present invention is liquid or semi-solid, and releases an inert gas when exposed to high temperatures to prevent the occurrence of fire, and does not require water management. Moreover, it is easy to handle and treat the waste liquid, and is suitable for use in, for example, lubricating oil, hydraulic oil, cutting oil, cleaning oil, processing oil, heat treatment oil, grease and the like.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C10N 40:22 40:24 50:10

Claims (11)

[Claims] 1. A liquid or semi-solid flame-retardant fluid containing a foaming substance that generates an inert gas during foaming. 2. The flame-retardant fluid according to claim 1, which contains a base oil and a foaming substance that generates an inert gas during foaming. 3. The flame-retardant fluid according to claim 1, wherein the foaming initiation temperature is higher than the use temperature and lower than the flash point of the combustible component in the fluid. 4. The flame retardant according to claim 1, wherein the formula (I): the theoretical average number of moles of the generated inert gas / theoretical average number of moles of all the generated gas ≧ 0.3 (I) is satisfied. Sex fluid. 5. The foamable substance has the general formula (II): [In the formula, A represents a direct bond or a divalent hydrocarbon group having 1 to 22 carbon atoms, R ¹ and R ² are each a hydrogen atom, a hydrocarbon group having 1 to 22 carbon atoms, or —CH (R ³ ) NR ⁴ R
⁵ (R ³ , R ⁴ and R ⁵ each represent a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, and they may be the same or different, but R ⁴ and R ⁵ are hydrogen atoms at the same time. R ⁴ and R ⁵ may be bonded to each other to form a ring structure), and they may be the same or different, and they may be bonded to each other to form a ring structure. It may be formed. ] The compound represented by the general formula (III): [In the formula, R ⁶ is a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, R ⁷ is a hydrogen atom, a hydrocarbon group having 1 to 22 carbon atoms, or —CH (R ⁸ ) NR ⁹ R ¹⁰ (R ⁸ , R ⁹ and R ¹⁰ each represent a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, which may be the same or different,
R ⁶ and R ⁸ and R ⁹ and R ¹⁰ are not hydrogen atoms at the same time, and R ⁹ and R ¹⁰ may be bonded to each other to form a ring structure. ), R ⁶ and R ⁷ may combine with each other to form a ring structure. ] The compound represented by
General formula (IV): [In the formula, R ^{11 to} R ¹⁵ are each a hydrogen atom or a carbon number 1
~ 22 hydrocarbon groups, which may be the same or different from each other, or may be bonded to each other to form a ring structure. ] And a compound represented by the general formula (V): [In the formula, R ¹⁶ and R ¹⁹ are each a hydrogen atom or a carbon number 1
~ 22 hydrocarbon groups, which may be the same or different from each other, or may be bonded to each other to form a ring structure. ] The flame-retardant fluid according to claim 1 or 2, which is at least one selected from the compounds represented by: 6. The flame-retardant fluid according to claim 1, wherein the foamable substance is a halogen-based nonflammable solvent. 7. The flame-retardant fluid according to claim 1, wherein the foamable substance is an inorganic foaming agent. 8. The inorganic foaming agent is at least one selected from sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium phosphate, ammonium carbonate, ammonium hydrogen carbonate, sodium carbonate and potassium carbonate.
Alternatively, the flame-retardant fluid according to item 2. 9. The calorific value of the foamable substance is Q ₀ (cal /
g), when the exothermic onset temperature is T ₀ (° C.) and the content of the foamable substance is W (wt%), the formula (VI) log (Q ₀ × W × 10 ^-2 ) <0.6679 × log The flame-retardant fluid according to claim 1 or 2, which satisfies the relationship of (T ₀ -25) +1.132 (VI). 10. The flame-retardant fluid according to claim 1, which has a water content (including water of crystallization) of 5% by weight or less. 11. The flame-retardant fluid according to claim 1, which is used as a lubricating oil, a hydraulic oil, a cutting oil, a processing oil, a cleaning oil, a heat treatment oil, an electric insulating oil or a grease.