CN109082139B - Fluorescent pigment powder for oil phase system and preparation method thereof - Google Patents
Fluorescent pigment powder for oil phase system and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
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- C09B69/10—Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds
- C09B69/109—Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds containing other specific dyes
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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Abstract
The invention discloses fluorescent pigment powder for an oil phase system and a preparation method thereof. The fluorescent pigment powder comprises the following components: long carbon chain fatty alcohol or long carbon chain fatty amine, cyanuric chloride, ammonia water, melamine, colorant, formaldehyde or paraformaldehyde. Adding long-carbon-chain fatty alcohol or long-carbon-chain fatty amine into a reactor, adding cyanuric chloride, stirring, heating to 10-70 ℃, adding excessive ammonia water, continuously heating for reaction for 2-5 hours, and evaporating to obtain an intermediate mixture; and (3) filling the intermediate mixture, melamine, formaldehyde or paraformaldehyde into a reaction bottle, heating for reaction for 2-5 hours, adding a colorant, continuing the reaction, and obtaining fluorescent pigment powder after high-temperature curing, cooling and crushing. The fluorescent pigment powder has simple preparation method, and can be used for dispersing oil phase systems such as polyolefin, paraffin, liquid paraffin, mineral oil and the like.
Description
Technical Field
The invention belongs to the field of fluorescent organic pigments, and particularly relates to fluorescent pigment powder for an oil phase system and a preparation method thereof.
Background
The fluorescent pigment is a functional luminescent material, and is distinguished from a general pigment in that when the fluorescent pigment is irradiated with ultraviolet light or visible light, electromagnetic waves of short wavelengths in the ultraviolet or visible light band are absorbed by the fluorescent pigment and then released as electromagnetic waves of long wavelengths. Long wavelength electromagnetic waves, which typically fall in the visible range, superimpose with the conventionally reflected light, revealing a glaring fluorescent color; when the light irradiation is stopped, the phenomenon of luminescence disappears, and thus the fluorescent pigment is called.
Most of the existing methods for preparing fluorescent pigment are to disperse fluorescent dye in a mixture of p-toluenesulfonamide, formaldehyde resin and melamine resin to prepare powdery fluorescent pigment, and then to mix the powdery fluorescent pigment with the resin to prepare the fluorescent pigment. The fluorescent pigment powder prepared by the methods of melamine-formaldehyde resin, melamine-urea-formaldehyde, p-toluenesulfonamide-formaldehyde resin and the like has better hydrophilicity and better dispersing capability in a water phase because the structures of the fluorescent pigment powder contain more amide, ether bond and the like, and can be prepared into aqueous fluorescent pigment emulsion by virtue of a dispersing agent, such as the fluorescent pigments introduced in patents CN102796512A, CN201310212183.9, CN201210469697.8, US3812051, US2938873 and the like. In the printing of fluorescent pigments, the fluorescent pigments are fixed to the surface of the textile by means of a printing binder, a synthetic resin which produces a fast film.
As described in CN102796512A, melamine and formaldehyde are used as raw materials to prepare a melamine-formaldehyde soluble prepolymer; adding fluorescent dye into the prepared prepolymer solution, and adsorbing and wrapping dye molecules in the branched prepolymer molecules; heating to make the prepolymer generate intramolecular and intermolecular further polycondensation reaction to obtain monodisperse fluorescent microspheres with controllable particle size and capable of wrapping various fluorescent dyes; it is reported in literature that fluorescent dye is dispersed in p-toluenesulfonamide modified melamine formaldehyde resin to prepare fluorescent pigment emulsion, and the fluorescent pigment emulsion is directly emulsified and mixed with colorless transparent polyacrylic resin at the temperature of 40-50 ℃ to prepare the fluorescent paint (university of Sichuan university (Nature science edition) 2001, 02).
CN102443340A, the fluorescent powder is prepared from fluorescent powder G5, epoxy resin, alkyd resin, perchloroethylene resin, dibutyl phthalate, epoxy curing agent, toluene and the like, and the fluorescent powder is mainly used for indicating signs of safety channels, safety doors and the like in public places and cannot be used for textile printing.
CN101643601, the water-based fluorescent paint is prepared from a color-developing agent, a pigment, a dispersing agent, a thickening agent, a defoaming agent, a mildew preventive, an anti-settling agent, a glycol auxiliary agent, water and the like, but the water-based fluorescent paint is only used for printing textiles with larger particle size and is not suitable for a textile printing process.
Although such fluorescent pigment powder is required to have good hydrophilicity, it is liable to agglomerate and has poor dispersibility when it is used in an oil phase system, for example, when it is used in oil phase materials such as candles, liquid paraffin, etc., it is required to add a large amount of an oil-soluble dispersant to achieve a stable dispersion state. The use of a large amount of oil-soluble dispersing agent not only increases the cost, but also influences the quality of oil phase substances and the color of final products.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide fluorescent pigment powder for an oil phase system and a preparation method thereof.
A fluorescent pigment powder for oil phase systems comprising the following components: comprises the following components: long carbon chain fatty alcohol or long carbon chain fatty amine, cyanuric chloride, ammonia water, melamine, colorant, formaldehyde or paraformaldehyde.
The improvement is that the colorant is one or a combination of more of basic yellow 24, basic yellow 40, basic red 1, basic red 2, basic red 13, basic red 14, basic red 27, basic violet 7, basic violet 10 and basic violet 16.
The improvement wherein the long carbon chain fatty alcohol is any one or more of n-decanol, dodecanol, tetradecanol, dodecanol, hexadecanol, stearyl alcohol, isotridecyl alcohol, isooctanol, guerbet eicosanol (2-octyl-1-dodecanol), guerbet docosanol (2-nonyltridecanol), or guerbet tetracosanol (2-decyltetradecanol).
The improvement is that the long carbon chain fatty amine is any one or more of n-decylamine, dodecylamine, tetradecylamine, dodecylamine, hexadecylamine and stearylamine.
The preparation method of the fluorescent pigment powder for the oil phase system comprises the following steps:
step 1, preparation of Long carbon chain alkyl substituted Melamine
When the component is long-carbon-chain fatty alcohol, adding the long-carbon-chain fatty alcohol into a reactor, adding cyanuric chloride, heating to 10-70 ℃ while stirring, adding triethylamine, reacting for 4-10 hours, adding excessive ammonia water into the system, heating to 60-90 ℃, continuing to react for 2-5 hours, and evaporating to remove water to obtain long-carbon-chain alkyl substituted melamine; when the component is long-carbon-chain fatty amine, the reaction process is the same as that of the long-carbon-chain fatty alcohol except that triethylamine is not added;
and 2, adding long-carbon-chain alkyl substituted melamine into melamine, formaldehyde or paraformaldehyde, putting the melamine, the formaldehyde or the paraformaldehyde into a reaction bottle, heating the mixture to 80-120 ℃, reacting for 2-5 hours, adding a coloring agent, continuously reacting for 2-3 hours, pouring the mixture into a tray while the mixture is hot, putting the tray into an oven, curing the mixture at the high temperature of 120 ℃ for 5-10 hours, cooling, removing the tray, and crushing the colored block resin to obtain the fluorescent pigment powder for the oil phase system.
As an improvement, the crushing step in the step 2 is as follows: crushing with a pulverizer, and further crushing with a jet mill.
As a modification, p-toluenesulfonamide is also added in step 2.
As an improvement, urea is also added in the step 2.
The principle is as follows: preparing a long carbon chain substituted melamine intermediate, adding the long carbon chain substituted melamine intermediate into a conventional melamine resin, urea resin and other fluorescent pigment systems in an enhanced manner, and simultaneously copolymerizing the long carbon chain substituted melamine intermediate with melamine, urea and p-toluenesulfonamide to prepare long carbon chain modified melamine resin fluorescent pigment powder.
Has the advantages that:
the fluorescent pigment powder for the oil phase system is finally prepared by functional monomer preparation, functional monomer introduction and polymerization process optimization. The preparation method is simple, is used for dispersing oil phase systems such as polyolefin (PP, PE), paraffin, liquid paraffin, mineral oil (vaseline) and the like, has good compatibility with the systems, is uniformly dispersed, and is not easy to agglomerate, settle or delaminate.
Drawings
FIG. 1 is a flow chart of the preparation of the fluorescent pigment powder for oil phase systems of the present invention;
FIG. 2 is a schematic view showing the dispersion state of the long carbon chain alkyl modified fluorescent pigment powder in the oil phase according to the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific examples.
The preparation equation of the long carbon chain alkyl substituted melamine is as follows.
When the component is long-chain fatty alcohol, the reaction formula is as follows:
when the component is a long carbon chain amine, the reaction formula is as follows:
wherein R is long-chain alkyl, such as decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, etc., isomeric tridecyl, 2-octyl-1-dodecyl, 2-nonyl tridecyl or 2-decyl tetradecyl.
Example 1
100g of stearyl alcohol is put into a four-neck flask, 68g of cyanuric chloride is added, the temperature is raised to 70 ℃, 5g of triethylamine is slowly added while stirring, white smoke is generated in the four-neck flask, 30ml of concentrated ammonia water is added after the reaction is carried out for 7 hours at 70 ℃, the reaction is continued for 2 hours at 70 ℃, and the octadecyloxy substituted melamine is obtained after the water is evaporated.
Putting 3.75g of octadecyloxy substituted melamine, 50g of melamine, 5g of urea and 20g of paraformaldehyde into a four-neck flask, heating to 98 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 272.125 g of basic red, uniformly stirring, putting a colored prepolymer resin tray together with the tray into an oven, drying at 120 ℃ for 7 hours, and taking out after the four-neck flask is cooled. At this time, the melamine resin in the four-neck flask became fluffy and porous, and after the tray was cooled, the tray was taken out, the colored resin was pulverized with a pulverizer, and then the powder was further pulverized with a jet mill to obtain a magenta fluorescent pigment powder.
Example 2
200g of hexadecanol is put into a four-neck flask, 140g of cyanuric chloride is added, the temperature is raised to 90 ℃, 12g of triethylamine is slowly added while stirring, white smoke is generated in the four-neck flask, 50 ml of concentrated ammonia water is added after the reaction is kept at 70 ℃ for 5 hours, the reaction is continued for 3 hours at 60 ℃, and the hexadecoxy substituted melamine is obtained after the water is evaporated.
228g of hexadecyloxy substituted melamine, 1000g of melamine, 100g of p-toluenesulfonamide and 420g of paraformaldehyde are put into a four-neck flask, the flask is heated to 98 ℃, the powder is gradually melted, the temperature is kept continuously for reaction for 2 hours, 1042 g of basic violet is added, the mixture is uniformly stirred, a colored prepolymer resin tray is placed on the hot flask, the tray is placed into an oven to be dried for 9 hours at the temperature of 115 ℃, the tray is taken out after being cooled, the colored resin is pulverized by a pulverizer, and the powder is further pulverized by an airflow pulverizer to obtain mauve fluorescent pigment powder.
Example 3
Adding 272g of decanol into a four-neck flask, adding 369g of cyanuric chloride, heating to 70 ℃ while stirring, adding 10ml of triethylamine, keeping the temperature at 70 ℃ for reaction for 10 hours, adding 1000 ml of concentrated ammonia water, heating to 90 ℃, continuing the reaction for 5 hours, and evaporating to dryness to obtain the decyloxy substituted melamine.
Putting 180g of decyloxy substituted melamine, 750g of melamine, 190g of urea and 280g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 2422 g of alkaline red yellow, uniformly stirring, putting a colored prepolymer resin tray into a drying oven while the prepolymer resin tray is hot, drying for 7 hours at 110 ℃, taking out after the tray is cooled, pulverizing the colored resin by using a pulverizer, and further pulverizing the powder by using an airflow pulverizer to obtain yellow fluorescent pigment powder.
Example 4
244g of isooctanol is added into a four-mouth flask, 340g of cyanuric chloride is added, the temperature is raised to 60 ℃ while stirring, 5ml of triethylamine is added, white smoke is produced in the four-mouth flask, the 60 ℃ is kept for reaction for 9 hours, 1000 ml of concentrated ammonia water is added, the temperature is raised to 80 ℃ for continuous reaction for 5 hours, and the isooctyl substituted melamine is obtained after water is evaporated.
Placing 5g of isooctyl substituted melamine, 70g of melamine, 10g of urea and 20g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 11 g of basic red and 241.2 g of basic yellow, uniformly stirring, placing a colored prepolymer resin tray on a hot tray, drying the tray in an oven at 110 ℃ for 5 hours, taking out the tray after cooling, powdering the colored resin by a powdering machine, and further crushing the powder by an airflow crusher to obtain orange fluorescent pigment powder.
Example 5
298.55g of 2-decyltetradecanol (Gelbert tetracosanol, ISOFOL 24, manufactured by Saxol company) is added into a four-neck flask, 184.5g of cyanuric chloride is added, the temperature is raised to 70 ℃ while stirring, 15ml of triethylamine is added, white smoke is produced in the four-neck flask, the four-neck flask is kept at 70 ℃ for reaction for 8 hours, 800ml of concentrated ammonia water is added, the temperature is raised to 80 ℃ for continuous reaction for 5 hours, and the 2-decyltetradecyltetradecyloxy substituted melamine is obtained after water is evaporated.
Putting 114g of 2-octyl-1-dodecyloxy substituted melamine, 600g of melamine, 100g of urea, 50g of p-toluenesulfonamide and 200g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 223.7 g of basic red, uniformly stirring, putting a tray of the colored prepolymer resin on a hot state, drying the tray in an oven at 120 ℃ for 8 hours, taking out the tray after the tray is cooled, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain red fluorescent pigment powder.
Example 6
234g of 2-octyl-1-dodecanol (Gelbert twenty carbon, ISOFOL 20, manufactured by Salso corporation) is added into a four-neck flask, 184.5g of cyanuric chloride is added, the temperature is raised to 65-70 ℃ while stirring, 15ml of triethylamine is added, white smoke is produced in the four-neck flask, 800ml of concentrated ammonia water is added after the reaction is carried out for 10 hours at the temperature of 65-70 ℃, the reaction is continued for 5 hours at the temperature of 80 ℃, and 2-octyl-dodecyloxy substituted melamine is obtained after water is evaporated.
Putting 114g of 2-octyldodecyl substituted melamine, 600g of melamine, 100g of urea, 50g of p-toluenesulfonamide and 200g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 223.7 g of alkaline red, uniformly stirring, putting a tray of the colored prepolymer resin on a hot state, putting the tray into an oven, drying for 8 hours at 120 ℃, taking out after the tray is cooled, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain red fluorescent pigment powder.
Example 7
524g of 2-nonyl tridecanol (Gelbert didodecane, ISOFOL 22, manufactured by Saxol company) is added into a four-neck flask, 369g of cyanuric chloride is added, the temperature is raised to 70 ℃ while stirring, 30ml of triethylamine is added, white smoke is produced in the four-neck flask, the four-neck flask is kept at 70 ℃ for reaction for 10 hours, 1.6L of concentrated ammonia water is added, the temperature is raised to 80 ℃ for continuous reaction for 5 hours, and the 2-nonyl tridecoxy substituted melamine is obtained after water is evaporated.
Placing 400g of 2-nonyl tridecyloxy substituted melamine, 2000 g of melamine, 200g of urea, 150g of p-toluenesulfonamide and 500g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 240.7 g of basic red and 2440 g of basic yellow, uniformly stirring, placing a colored prepolymer resin tray while hot, placing the tray into an oven for drying at 120 ℃ for 8 hours, taking out after the tray is cooled, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain orange fluorescent pigment powder.
Example 8
200g of dodecylamine is put into a four-neck flask, 147.5g of cyanuric chloride is added, the mixture is stirred and kept at 10 ℃ for reaction, white smoke is produced in the four-neck flask, 50 ml of strong ammonia water is added after 10 ℃ for reaction for 10 hours, the temperature is raised to 60 ℃ for continuous reaction for 3 hours, and the dodecylamine substituted melamine is obtained after water is evaporated.
200g of dodecylamino substituted melamine, 1500g of melamine, 100g of urea, 100g of p-toluenesulfonamide and 300g of paraformaldehyde are placed in a four-neck flask, the four-neck flask is heated to 98 ℃, the powder is gradually melted, the temperature is continuously kept for reaction for 2 hours, alkaline yellow 4022 g is added, the mixture is uniformly stirred, a colored prepolymer resin tray is placed while the mixture is hot, the mixture is placed in an oven to be dried for 8 hours at the temperature of 105 ℃, the tray is taken out after being cooled, the colored resin is pulverized by a pulverizer, and the powder is further pulverized by an airflow pulverizer to obtain yellow fluorescent pigment powder.
Example 9
185g of tetradecylamine is added into a four-neck flask, 184.5g of cyanuric chloride is added, stirring is carried out, the temperature is increased to 20 ℃, white smoke is produced in the four-neck flask, the temperature is kept at 20 ℃, 1000 ml of concentrated ammonia water is added after 8 hours of reaction, the temperature is increased to 80 ℃, the reaction is continued for 3 hours, and the tetradecylamino substituted melamine is obtained after water is evaporated.
Putting 168g of tetradecylamino substituted melamine, 750g of melamine, 150g of urea and 280g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 1322 g of alkaline red, uniformly stirring, putting a colored prepolymer resin tray into an oven while the tray is hot, drying for 7 hours at 110 ℃, taking out after the tray is cooled, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain red fluorescent pigment powder.
Example 10
Adding 209g of hexadecyl amine into a four-neck flask, adding 184.5g of cyanuric chloride, heating to 40-50 ℃ while stirring, producing white smoke in the four-neck flask, keeping the temperature at 40-50 ℃ for reaction for 10 hours, adding 800ml of concentrated ammonia water, heating to 80 ℃, continuing the reaction for 5 hours, and evaporating the water to obtain hexadecyl amino melamine.
Putting 400g of hexadecyl amino melamine, 2000 g of melamine, 200g of urea, 150g of p-toluenesulfonamide and 500g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 240.7 g of basic red and 2440 g of basic yellow, uniformly stirring, putting a colored prepolymer resin tray on a hot tray, putting the tray into an oven, drying for 8 hours at 120 ℃, taking out the tray after cooling, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain orange fluorescent pigment powder.
Example 11
Adding 233g of octadecylamine into a four-neck flask, adding 184.5g of cyanuric chloride, heating to 70 ℃ while stirring, producing white smoke in the four-neck flask, keeping the temperature at 70 ℃ for reacting for 8 hours, adding 800ml of concentrated ammonia water, heating to 60 ℃, continuing to react for 5 hours, and evaporating to dryness to obtain the octadecylaminomelamine.
Placing 400g of octadecylaminomelamine, 2200 g of melamine, 210g of urea, 130g of p-toluenesulfonamide and 530g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 220.7 g of basic red and 2450 g of basic yellow, uniformly stirring, carrying out hot tray placing on the colored prepolymer resin, placing the tray into an oven, drying for 8 hours at 120 ℃, taking out after the tray is cooled, grinding the colored resin by using a grinding machine, and further grinding the powder by using an airflow grinder to obtain orange fluorescent pigment powder.
Example 12
Adding 137g of decylamine into a four-neck flask, adding 184.5g of cyanuric chloride, heating to 70 ℃ while stirring, producing white smoke in the four-neck flask, keeping the temperature at 70 ℃ for reaction for 4 hours, adding 800ml of concentrated ammonia water, heating to 60 ℃, continuing the reaction for 5 hours, and evaporating the water to obtain the decylamine.
Placing 40g of decaminomelamine, 200g of melamine, 20g of urea, 13g of p-toluenesulfonamide and 50g of paraformaldehyde into a four-neck flask, heating to 105 ℃, gradually melting the powder, continuously keeping the temperature for reaction for 2 hours, adding 23.7g of basic red and 243 g of basic yellow, uniformly stirring, placing a colored prepolymer resin tray on a hot tray, placing the tray into an oven, drying for 8 hours at 120 ℃, taking out after the tray is cooled, pulverizing the colored resin by a pulverizer, and further pulverizing the powder by an airflow pulverizer to obtain orange fluorescent pigment powder.
Detection of
100ml of liquid paraffin was taken and placed in a flask, 2g of the fluorescent pigment powder prepared in the examples was added thereto, and after stirring uniformly at 700r/min with a stirrer, the flask was allowed to stand for 20 hours, and the color of the paraffin and the bottom pigment precipitate in the flask were observed.
The detection shows that the pigment powder prepared in the embodiment has no obvious precipitate at the bottom of the beaker, and the liquid paraffin has uniform color and no obvious agglomeration phenomenon.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.
Claims (3)
1. A fluorescent pigment powder for oil phase systems, characterized by comprising the following components:
long carbon chain fatty alcohol or long carbon chain fatty amine, cyanuric chloride, ammonia water, melamine, colorant, formaldehyde or paraformaldehyde; the long-carbon-chain fatty alcohol is any one or a mixture of more of n-decanol, dodecanol, tetradecanol, dodecanol, hexadecanol, stearyl alcohol, isotridecyl alcohol, isooctanol, Guerbet eicosanol (2-octyl-1-dodecanol), Guerbet docosanol (2-nonyl tridecanol) or Guerbet tetracosanol (2-decyl tetradecanol); the long-carbon-chain fatty amine is any one or a mixture of n-decylamine, dodecylamine, tetradecylamine, dodecylamine, hexadecylamine and stearylamine;
the preparation method of the fluorescent pigment powder of the oil phase system comprises the following steps:
step 1, preparation of Long carbon chain alkyl substituted Melamine
When the component is long-carbon-chain fatty alcohol, adding the long-carbon-chain fatty alcohol into a reactor, adding cyanuric chloride, heating to 10-70 ℃ while stirring, adding triethylamine, reacting for 4-10 hours, adding excessive ammonia water into the system, heating to 60-90 ℃, continuing to react for 2-5 hours, and evaporating to remove water to obtain long-carbon-chain alkyl substituted melamine; when the component is long-carbon-chain fatty amine, the reaction process is the same as that of the long-carbon-chain fatty alcohol except that triethylamine is not added;
step 2, adding long-carbon-chain alkyl substituted melamine into melamine, formaldehyde or paraformaldehyde, putting the melamine, the formaldehyde or the paraformaldehyde into a reaction bottle, heating the mixture to 80-120 ℃, reacting for 2-5 hours, adding a coloring agent, continuously reacting for 2-3 hours, pouring the mixture into a tray while the mixture is hot, putting the mixture into an oven, curing the mixture at the high temperature of 120 ℃ for 5-10 hours, cooling, removing the tray, and crushing the colored block resin to obtain the fluorescent pigment powder for the oil phase system; and at least one of urea and p-toluenesulfonamide is added in the step 2.
2. A fluorescent pigment powder for use in oil phase systems according to claim 1, wherein the colorant is one or more of basic yellow 24, basic yellow 40, basic red 1, basic red 2, basic red 13, basic red 14, basic red 27, basic violet 7, basic violet 10, basic violet 16.
3. A fluorescent pigment powder for oil phase systems according to claim 1, wherein the step of pulverizing in step 2 is: crushing with a pulverizer, and further crushing with a jet mill.
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