CN110698983B - Color developing coating for detecting fuel oil overflow of airplane in flying process - Google Patents

Abstract

The invention provides a color developing coating for detecting fuel oil overflow of an airplane in the flying process, and belongs to the field of coatings. The color developing coating for detecting fuel oil overflow of the airplane in the flying process comprises, by weight, 30-50 parts of oil-soluble resin, 30-50 parts of solvent, 0.5-2 parts of fluorescent color developing agent, 5-18 parts of toughening agent and 0.1-0.5 part of coating auxiliary agent. The coating film formed by the coating can withstand the air high speed of 0.85Ma in the process of airplane test flight without falling off; the drying time at 25 ℃ is controlled to be about 2-3 hours; the paint does not crack or fall off at the temperature of minus 60 ℃; the coating film can be smooth and flat; excellent performance, water resistance, damp and heat resistance, high and low temperature cycle resistance; the color development is excellent, the fuel oil is instantly dissolved and developed after dropping, and the developed trace is always reserved; the coating is easy to remove, and the aviation fuel can be easily wiped off after the airplane test flight is finished; the aircraft skin is harmless after the removal.

Description

Color developing coating for detecting fuel oil overflow of airplane in flying process

Technical Field

The invention relates to a paint, in particular to a chromogenic paint for detecting fuel oil overflow of an airplane in the flying process.

Background

At present, the common model of the aircraft fuel oil in China is RP-3, and because the aircraft fuel oil is clear transparent liquid and has volatility, the leaked aircraft fuel oil can volatilize quickly under high-speed airflow and is difficult to monitor. According to the flight test requirements, in order to monitor whether aviation fuel leaks from an aircraft fuel tank vent in the process of flight test, a coating for detecting overflowed fuel is coated around the aircraft fuel tank vent, namely, the overflowed fuel at the fuel tank vent is adsorbed and effective evidence is left in the process of flight test. The main components of the aviation fuel oil are saturated alkane with 10-16 carbon atoms and aromatic hydrocarbon mixture with volume fraction not more than 25%, the chemical property of the aviation fuel oil is very stable, and the aviation fuel oil is difficult to generate chemical and color development reaction with other substances, so that no mature aviation fuel oil color development coating exists at home and abroad, and the color development problem is always a difficult point in the test flight process.

In the prior art, Chinese patent CN 103148997A provides a fuel oil color developing coating, but the developed color developing coating is dissolved in water, the adhesive force is poor, the color developing coating can drop in the test flight process, and the color developing effect is poor after fuel oil is adsorbed.

Disclosure of Invention

In order to solve the problems, the invention provides the developing coating which has good adhesive force, obvious developing and low temperature resistance and is used for detecting fuel oil overflow of the airplane in the flying process.

Specifically, the invention is realized by the following technical scheme:

a color developing coating for detecting fuel oil overflow of an airplane in the flying process comprises, by weight, 30-50 parts of oil-soluble resin, 30-50 parts of solvent, 0.5-2 parts of fluorescent color developing agent, 5-18 parts of toughening agent and 0.1-0.5 part of coating auxiliary agent;

wherein the coating auxiliary agent comprises a wetting and leveling agent.

Preferably, the oil-soluble resin is selected from any one of oil-soluble phenolic resin, alkyd resin, acrylic resin, polyester resin, C5 petroleum resin, C9 petroleum resin, modified C5 petroleum resin, modified C9 petroleum resin, rosin and modified rosin.

More preferably, the oil-soluble resin is selected from any one of alkyd resin, petroleum resin and rosin.

Preferably, the solvent is selected from any one or any more of benzene, toluene, xylene, trimethylbenzene, ethylbenzene, butyl acetate, propyl acetate, ethyl lactate, acetone, butanone, methyl ethyl ketone, diethyl ketone, cyclohexanone, methyl isobutyl ketone, methyl n-butyl ketone, 200# solvent oil, rosin water, n-hexane, n-octane, n-decane, dichloroethane, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-amyl alcohol, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol propyl ether, propylene glycol butyl ether and propylene glycol phenyl ether.

More preferably, the solvent is selected from any one or any more of toluene, xylene, butyl acetate, acetone, methyl ethyl ketone, cyclohexane and dichloroethane.

Preferably, the fluorescent color-developing agent is at least one selected from the group consisting of a distyrylbenzene-based fluorescent color-developing agent, a coumarin-based fluorescent color-developing agent, a pyrazoline-based fluorescent color-developing agent, a benzoxazole-based fluorescent color-developing agent, and a phthalimide-based fluorescent color-developing agent.

More preferably, the fluorescent color developer is selected from any one or more of 9-fluorenone, 10-phenanthrenequinone and perylene.

Preferably, the toughening agent is selected from at least one of phthalic acid toughening agent, aliphatic dicarboxylic acid plasticizer, phosphate ester toughening agent and three-membered epoxy toughening agent.

Preferably, the phthalic acid toughening agent comprises dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, and didecyl phthalate.

Preferably, the aliphatic dicarboxylic acid plasticizer includes dioctyl adipate, diisodecyl adipate, diisononyl adipate, diisooctyl azelate, diisooctyl sebacate, diisodecyl sebacate.

Preferably, the phosphate ester type toughening agent comprises tributyl phosphate, trioctyl phosphate, diphenyl-isooctyl phosphate, triphenyl phosphate and triisopropylphenyl phosphate.

Preferably, the ternary epoxy toughening agent comprises epoxy fatty acid glyceride, epoxy fatty acid monoester and epoxy tetrahydrophthalate.

More preferably, the toughening agent is selected from any one or more of diisononyl adipate, dibutyl phthalate, dioctyl phthalate and tributyl phosphate.

Preferably, the wetting and leveling agent is selected from any one or more of BYK333, BYK344, BYK310, BYK306, BYK307, Tego370, Tego410, Tego425, Tego2250, EFKA3030, EFKA3031, EFKA3033, EFKA3034, EFKA3037, EFKA3236, EFKA3239, EFKA3600, EFKA3772, EFKA3777, EFKA3778, EFKA3886, SN4384, SN4331, SN4333, SN4345, SN4341, SN4034, and SN 4335.

More preferably, the wetting and leveling agent is selected from any one or more of BYK333, BYK344, BYK310, Tego410, EFKA3034, SN 4333.

The invention also provides a preparation method of the chromogenic coating for detecting fuel oil overflow of the airplane in the flying process, which comprises the following steps:

step 1, adding oil-soluble resin into a solvent, and stirring to dissolve the oil-soluble resin into the solvent to obtain a mixed solution 1;

step 2, adding the fluorescent color developing agent into the mixed solution 1, and stirring to uniformly disperse the fluorescent color developing agent to obtain a mixed solution 2;

step 3, adding the coating auxiliary agents into the mixed solution 2, stirring to uniformly disperse the coating auxiliary agents to obtain a mixed solution 3, wherein when more than one coating auxiliary agent is added, the interval time for adding each coating auxiliary agent is not less than 3 minutes;

and 4, adding a toughening agent into the mixed solution 3, and uniformly stirring to obtain the color developing coating for detecting fuel oil overflow of the airplane in the flying process.

The invention also provides a using method of the color developing coating for detecting fuel oil overflow of the airplane in the flying process, which comprises the following steps:

coating a developing coating for detecting fuel oil overflow of an airplane in the flying process on an area to be detected, wherein the thickness of the developing coating is 30-60 mu m, and drying the developing coating for 2-3 hours at normal temperature; after the airplane test flight is finished, irradiating an airplane fuel developing coating area by using an ultraviolet lamp, if the fluorescent coating of the coating area has obvious spots or uneven fluorescence, indicating that a color developing agent coating film of the detected area is dissolved, and an ultraviolet fluorescent color developing agent array is damaged, indicating that airplane fuel adheres.

The invention also provides a method for removing the developing paint for detecting fuel oil overflow of the airplane in the flying process, which comprises the following steps:

and (3) soaking the area coated with the fuel oil color developing coating by using the aviation fuel oil for 20-50 seconds or slightly wiping the area by using a rag or paper dipped with the aviation fuel oil.

Specifically, the mechanism of the color developing coating for detecting the fuel oil overflow of the airplane in the flying process is as follows: when the coating is coated on an area to be measured of an airplane, a layer of coating film with the thickness of 30-60 mu m can be formed after drying, and the main components of the aviation fuel oil are saturated alkane with the carbon number of 10-16 and aromatic hydrocarbon mixture with the volume fraction not more than 25%. Because the film forming material is easily dissolved in the aviation fuel, and the fluorescent color developing agent is uniformly distributed in the coating, the whole coating can uniformly fluoresce under an ultraviolet lamp. When aviation fuel drops on the color developing agent coating, the coating can be quickly dissolved, so that the fluorescent agent in the original coating is distributed disorderly, and under the irradiation of an ultraviolet lamp: spots or flow marks eroded by fuel oil appear in the coating area, and slide marks flowing through the aviation fuel oil carrying fluorescent coloring matter appear in the uncoated area.

The invention has the advantages that: the color developing coating for detecting fuel oil overflow of an airplane in the flying process mainly comprises oil-soluble resin, a solvent, a fluorescent color developing agent, a toughening agent and a wetting and leveling agent. The oil-soluble resin is mainly used for volatilizing the solvent to form a continuous film after coating, and the coating can withstand the air high speed of 0.85Ma and cannot fall off in the process of airplane test flight. The main function of the solvent is to control the drying time at 25 ℃ to be about 2-3 hours. The toughening agent has the function of ensuring that the coating film does not crack or fall off at the temperature of minus 60 ℃. The wetting and leveling agent has the functions of reducing the surface tension of the coating and enabling the coating to be smooth and flat. Excellent performance, water resistance, damp and heat resistance and high and low temperature cycle resistance. In addition, the color rendering property is excellent, the fuel oil drops to be instantly dissolved and developed, and the developed trace is always kept; the coating is easy to remove, and the aviation fuel can be easily wiped off after the airplane test flight is finished; the aircraft skin is harmless after the removal.

Drawings

FIG. 1 is a flow chart illustrating the preparation of examples 1-2 of a color developing coating for detecting fuel spillage during flight of an aircraft according to the present invention;

FIG. 2 is a schematic diagram of the color development mechanism of the color development coating of the embodiment 1-2 for detecting fuel oil overflow of an airplane during the flying process;

FIG. 3 is a diagram of the color development result of the color development coating of the embodiment 1 for detecting the fuel oil overflow of the airplane during the flying process.

Detailed Description

The present invention is further illustrated by the following detailed description of specific embodiments, which are provided for the purpose of illustration only and are not to be construed as limiting the invention.

The fractions in the following examples are parts by weight unless otherwise specified.

Example 1

A color developing paint for detecting fuel oil overflow of an airplane during flying comprises the following specific components and dosage shown in Table 1.

TABLE 1 EXAMPLE 1 specific ingredients and amounts used

Serial number	Raw material	Weight (D)	Remarks for note
				1	Rosin	42	Oil soluble resin
2	Acetic acid butyl ester	20	Solvent(s)
				3	Cyclohexane	16	Solvent(s)
4	Acetone (II)	6	Solvent(s)
				5	10-phenanthrenequinone	0.4	Fluorescent color developing agent
6	9-fluorenones	0.5	Fluorescent color developing agent
				7	BYK333	0.3	Wetting and leveling agent
8	SN4333	0.2	Wetting and leveling agent
				9	Tego410	0.1	Toughening agent
10	Dioctyl phthalate	9	Toughening agent
				11	Dibutyl phthalate	5.5	Toughening agent

As shown in FIG. 1, the preparation method of the color developing coating for detecting fuel oil overflow of the airplane in the flying process comprises the following steps:

step 1, adding 42 parts of rosin into a mixed solvent consisting of 20 parts of butyl acetate, 16 parts of cyclohexane and 6 parts of acetone, and stirring for 30 minutes to fully dissolve the rosin in the mixed solvent to obtain a mixed solution 1;

step 2, adding 0.4 part of 10-phenanthrenequinone and 0.5 part of 9-fluorenone into the mixed solution 1, and stirring for 5 minutes to uniformly disperse the fluorescent color developing agent to obtain a mixed solution 2;

step 3, adding 0.3 part of BYK333, 0.2 part of SN4333 and 0.1 part of Tego410 into the mixed solution 2, and stirring for 3 minutes after each wetting and leveling agent is added to uniformly disperse the wetting and leveling agent to obtain a mixed solution 3;

and 4, adding 9 parts of dioctyl phthalate and 5.5 parts of dibutyl phthalate into the mixed solution 3, and uniformly stirring to obtain the color developing coating for detecting fuel oil overflow of the airplane in the flying process.

The chromogenic coatings prepared in this example for testing fuel spillage during flight of an aircraft were tested according to the corresponding specifications, with the test results shown in table 2.

Table 2 example 1 coating test results

The colored coating prepared by the embodiment and used for detecting fuel oil overflow of the airplane in the flying process is also subjected to a flight verification test.

The wing oil tank air vent is the centre of a circle, and the circular area of radius 750mm is the area of treating the spraying, uses clean rag to clean the area of treating the spraying around the left and right wing oil tank air vent, should ensure in the test process that this area has pollutants such as earth, dust to adhere to. The maximum flying air pressure height is 26586ft, the minimum flying temperature is-40 ℃, and the flying time is 4.8 h.

The application method of the color developing coating for detecting the fuel oil overflow of the airplane in the flying process, which is provided by the embodiment, is that the color developing coating is coated on an area to be detected, the thickness of the color developing coating is about 40 mu m, and the color developing coating is dried for 2 hours at normal temperature; before and after flying, the coating is well adhered to the surface of the wing, has no cracking, foaming and shedding phenomena, can quickly adsorb overflowed fuel oil droplets under the conditions of high speed (0.71Ma) and low temperature (-40 ℃), and keeps fuel oil traces on the surface of the fuel oil color developing agent until the airplane returns to the ground; after the airplane test flight is finished, an ultraviolet lamp with the wavelength of 200-420nm is used for irradiating an airplane fuel color developing coating area, if the fluorescent coating of the coating area has obvious spots or uneven fluorescence, the fact that the color developing agent coating of the area to be tested is dissolved is shown, the ultraviolet fluorescent color developing agent array is damaged, the fact that airplane fuel droplets are adhered is shown, and in addition, flight tests prove that the paint does not corrode the airplane skin and surface paint and does not chemically react with the paint.

As shown in fig. 2, the color development mechanism of the color development coating for detecting fuel oil overflow of an airplane during flying in the embodiment is that the film forming material is easily soluble in aviation fuel oil, and the fluorescent color development agent is uniformly distributed in the coating, so that the whole coating uniformly fluoresces under an ultraviolet lamp. When aviation fuel drops on the color developing agent coating, the coating can be quickly dissolved, so that the fluorescent agent in the original coating is distributed disorderly, and under the irradiation of an ultraviolet lamp: spots or flow marks eroded by fuel oil appear in the coating area, and slide marks flowing through the aviation fuel oil carrying fluorescent coloring matter appear in the uncoated area.

As shown in FIG. 3, the left diagram of FIG. 3 is a diagram of the fuel not dropping, and the right diagram of FIG. 3 is a diagram after the fuel dropping, and the front-back change is obvious, which shows that the invention can well check whether the fuel overflows during the flight of the aircraft.

Example 2

A color developing paint for detecting fuel oil overflow of an airplane during flying comprises the following specific components and dosage shown in Table 3.

TABLE 1 EXAMPLE 2 specific ingredients and amounts used

Serial number	Raw material	Weight (D)	Remarks for note
				1	Alkyd resin	40.4	Oil soluble resin
2	Xylene	30	Solvent(s)
				3	Cyclohexane	12	Solvent(s)
4	Acetic acid butyl ester	6.4	Solvent(s)
				5	9-fluorenones	0.5	Fluorescent color developing agent
6	10-phenanthrenequinone	0.3	Fluorescent color developing agent
				7	BYK310	0.3	Wetting and leveling agent
8	BYK333	0.1	Wetting and leveling agent
				9	Dioctyl phthalate	2	Toughening agent
10	Diisononyl adipate	8	Toughening agent

As shown in FIG. 1, the preparation method of the color developing coating for detecting fuel oil overflow of the airplane in the flying process comprises the following steps:

step 1, adding 40.4 parts of alkyd resin into a mixed solvent consisting of 30 parts of dimethylbenzene, 12 parts of cyclohexane and 6.4 parts of butyl acetate, and stirring for 30 minutes to fully dissolve rosin in the mixed solvent to obtain a mixed solution 1;

step 2, adding 0.5 part of 9-fluorenone and 0.3 part of 10-phenanthrenequinone into the mixed solution 1, and stirring for 5 minutes to uniformly disperse the fluorescent color developing agent to obtain a mixed solution 2;

step 3, adding 0.3 part of BYK310 and 0.1 part of BYK333 into the mixed solution 2, and stirring for 3 minutes after each wetting and leveling agent is added to uniformly disperse the wetting and leveling agent to obtain a mixed solution 3;

and 4, adding 2 parts of dioctyl phthalate and 8 parts of diisononyl adipate into the mixed solution 3, and uniformly stirring to obtain the color developing coating for detecting fuel oil overflow of the airplane in the flying process.

The chromogenic coatings prepared in this example for testing fuel spillage during flight of an aircraft were tested according to the corresponding specifications, with the test results shown in table 4.

Table 4 example 2 coating test results

The colored coating prepared by the embodiment and used for detecting fuel oil overflow of the airplane in the flying process is also subjected to a flight verification test.

The air vent of the wing oil tank is a circle center, a circular area with the radius of 750mm is an area to be sprayed, clean rags are used for wiping the area to be sprayed around the air vent of the left wing oil tank and the right wing oil tank, the area is ensured to be free of dirt, dust and other pollutants in the test process, and the wing is constructed as soon as possible after being cleaned so as to avoid secondary pollution. The maximum flying air pressure height is 16293ft, the minimum flying temperature is-28.3 ℃, and the flying time length is 3.2 h.

The application method of the color developing coating for detecting the fuel oil overflow of the airplane in the flying process, which is provided by the embodiment, is that the color developing coating is coated on an area to be detected, the thickness of the color developing coating is about 40 mu m, and the color developing coating is dried for 2 hours at normal temperature; before and after flying, the coating is well adhered to the surface of the wing, has no cracking, foaming and shedding phenomena, can quickly adsorb overflowed fuel oil droplets under the conditions of high speed (0.54Ma) and low temperature (minus 28.3 ℃), and keeps fuel oil traces on the surface of the fuel oil developer until the airplane returns to the ground; after the airplane test flight is finished, an ultraviolet lamp with the wavelength of 200-420nm is used for irradiating an airplane fuel color developing coating area, if the fluorescent coating of the coating area has obvious spots or uneven fluorescence, the fact that the color developing agent coating of the area to be tested is dissolved is shown, the ultraviolet fluorescent color developing agent array is damaged, the fact that airplane fuel droplets are adhered is shown, and in addition, flight tests prove that the paint does not corrode the airplane skin and surface paint and does not chemically react with the paint.

As shown in fig. 2, the color development mechanism of the color development coating for detecting fuel oil overflow of an airplane during flying in the embodiment is that the film forming material is easily soluble in aviation fuel oil, and the fluorescent color development agent is uniformly distributed in the coating, so that the whole coating uniformly fluoresces under an ultraviolet lamp. When aviation fuel drops on the color developing agent coating, the coating can be quickly dissolved, so that the fluorescent agent in the original coating is distributed disorderly, and under the irradiation of an ultraviolet lamp: spots or flow marks eroded by fuel oil appear in the coating area, and slide marks flowing through the aviation fuel oil carrying fluorescent coloring matter appear in the uncoated area.

Claims (9)

1. The color developing coating for detecting fuel oil overflow of an airplane in the flying process is characterized by comprising 30-50 parts by weight of oil-soluble resin, 30-50 parts by weight of solvent, 0.5-2 parts by weight of fluorescent color developing agent, 5-18 parts by weight of flexibilizer and 0.1-0.5 part by weight of coating auxiliary agent;

wherein the coating auxiliary agent comprises a wetting leveling agent,

the oil-soluble resin is any one of oil-soluble phenolic resin, alkyd resin, acrylic resin, polyester resin, C5 petroleum resin, C9 petroleum resin, modified C5 petroleum resin, modified C9 petroleum resin, rosin and modified rosin.

2. The colored paint for detecting fuel spillage during flight of an aircraft according to claim 1, wherein the solvent is selected from any one or more of benzene, toluene, xylene, trimethylbenzene, ethylbenzene, butyl acetate, propyl acetate, ethyl lactate, acetone, butanone, methyl ethyl ketone, diethyl ketone, cyclohexanone, methyl isobutyl ketone, methyl n-butyl ketone, No. 200 solvent oil, rosin water, n-hexane, n-octane, n-decane, dichloroethane, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-amyl alcohol, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol propyl ether, propylene glycol butyl ether and propylene glycol phenyl ether.

3. The color developing coating for detecting fuel overflow of an airplane during flying as claimed in claim 1, wherein the fluorescent color developing agent is at least one selected from a distyrylbenzene fluorescent color developing agent, a coumarin fluorescent color developing agent, a pyrazoline fluorescent color developing agent, a benzoxazole fluorescent color developing agent and a phthalimide fluorescent color developing agent.

4. The color developing coating for detecting fuel oil overflow of an airplane during flying as claimed in claim 3, wherein the fluorescent color developing agent is selected from any one or more of 9-fluorenone, 10-phenanthrenequinone and perylene.

5. The chromogenic coating for detecting fuel oil spillage of an aircraft during flight according to claim 1, wherein the flexibilizer is selected from at least one of phthalic acid flexibilizer, aliphatic dicarboxylic acid plasticizer, phosphate flexibilizer and three-membered epoxy flexibilizer.

6. A colour developing coating for testing aircraft for fuel spillage during flight according to claim 5, characterised in that the flexibiliser is selected from any one or more of diisononyl adipate, dibutyl phthalate, dioctyl phthalate, tributyl phosphate.

7. The colored paint for detecting fuel overflow of an aircraft during flight according to claim 1, wherein the wetting and leveling agent is selected from any one or more of BYK333, BYK344, BYK310, BYK306, BYK307, Tego370, Tego410, Tego425, Tego2250, EFKA3030, EFKA3031, EFKA3033, EFKA3034, EFKA3037, EFKA3236, EFKA3239, EFKA3600, EFKA3772, EFKA3777, EFKA3778, EFKA3886, SN4384, SN4331, SN4333, SN4345, SN4341, SN4034 and SN 4335.

8. The colored paint for detecting fuel overflow of an airplane during flying as claimed in claim 1, wherein the wetting and leveling agent is selected from any one or more of BYK333, BYK344, BYK310, Tego410, EFKA3034 and SN 4333.

9. A method of preparing a colour developing coating for testing fuel spillage during flight of an aircraft as claimed in any one of claims 1 to 8, comprising the steps of:

step 1, adding oil-soluble resin into a solvent, and stirring to dissolve the oil-soluble resin into the solvent to obtain a mixed solution 1;

step 2, adding the fluorescent color developing agent into the mixed solution 1, and stirring to uniformly disperse the fluorescent color developing agent to obtain a mixed solution 2;

step 3, adding the coating auxiliary agents into the mixed solution 2, stirring to uniformly disperse the coating auxiliary agents to obtain a mixed solution 3, wherein when more than one coating auxiliary agent is added, the interval time for adding each coating auxiliary agent is not less than 3 minutes;

and 4, adding a toughening agent into the mixed solution 3, and uniformly stirring to obtain the color developing coating for detecting fuel oil overflow of the airplane in the flying process.

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