CN114316622A - High-light-resistance anti-yellowing fluorescent whitening agent and preparation method thereof - Google Patents
High-light-resistance anti-yellowing fluorescent whitening agent and preparation method thereof Download PDFInfo
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- 238000004383 yellowing Methods 0.000 title claims abstract description 35
- 239000006081 fluorescent whitening agent Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 239000000243 solution Substances 0.000 claims abstract description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 26
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920000881 Modified starch Polymers 0.000 claims abstract description 13
- 239000004368 Modified starch Substances 0.000 claims abstract description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 13
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 13
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 235000005822 corn Nutrition 0.000 claims abstract description 13
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 13
- 239000000839 emulsion Substances 0.000 claims abstract description 13
- 150000007529 inorganic bases Chemical class 0.000 claims abstract description 13
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 13
- 235000019426 modified starch Nutrition 0.000 claims abstract description 13
- 150000007524 organic acids Chemical class 0.000 claims abstract description 13
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 13
- 230000002087 whitening effect Effects 0.000 claims abstract description 13
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003916 acid precipitation Methods 0.000 claims abstract description 11
- MGNCLNQXLYJVJD-UHFFFAOYSA-N cyanuric chloride Chemical compound ClC1=NC(Cl)=NC(Cl)=N1 MGNCLNQXLYJVJD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 241000209149 Zea Species 0.000 claims abstract 4
- 238000003756 stirring Methods 0.000 claims description 49
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 25
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- REJHVSOVQBJEBF-OWOJBTEDSA-N 5-azaniumyl-2-[(e)-2-(4-azaniumyl-2-sulfonatophenyl)ethenyl]benzenesulfonate Chemical compound OS(=O)(=O)C1=CC(N)=CC=C1\C=C\C1=CC=C(N)C=C1S(O)(=O)=O REJHVSOVQBJEBF-OWOJBTEDSA-N 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 5
- 239000001361 adipic acid Substances 0.000 claims description 5
- 235000011037 adipic acid Nutrition 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000006386 neutralization reaction Methods 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 235000011118 potassium hydroxide Nutrition 0.000 claims description 4
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 4
- -1 polyoxyethylene Polymers 0.000 claims description 3
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 claims description 2
- 239000005750 Copper hydroxide Substances 0.000 claims description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910001956 copper hydroxide Inorganic materials 0.000 claims description 2
- 230000001804 emulsifying effect Effects 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 229960004887 ferric hydroxide Drugs 0.000 claims description 2
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 150000002763 monocarboxylic acids Chemical class 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 150000003628 tricarboxylic acids Chemical class 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 240000008042 Zea mays Species 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000004744 fabric Substances 0.000 description 3
- 239000007844 bleaching agent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a high-light-resistance anti-yellowing fluorescent whitening agent, which consists of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol, wherein the processing technology comprises the following steps: preparing a solution, preparing a mixed solution, preparing an emulsion, carrying out acid precipitation treatment, and obtaining a whitening agent; the processing technology adopted by the invention is raw materials specified by national standards, the high-light-resistance anti-yellowing fluorescent whitening agent prepared by the invention is greatly improved, chemical components such as corn modified starch, polyvinyl alcohol and the like are added into the whitening agent, the whitening agent is mixed and produced according to a certain proportion, and the reaction time and the reaction temperature are strictly controlled, so that the light resistance and the yellowing resistance of the whitening agent can be greatly improved, and the fluorescent whitening agent has the characteristics of no toxicity and environmental protection in the using process.
Description
Technical Field
The invention relates to the technical field of composite fabric processing, in particular to a high-light-resistance anti-yellowing fluorescent whitening agent and a preparation method thereof.
Background
Whitening agents are a class of organic compounds that enhance the whiteness of fabrics and paper and the like. Also known as optical brighteners and fluorescent brighteners. Fabrics and the like are often yellow due to colored impurities, and in the past, chemical bleaching methods are used for decolorization, and whitening agents are added into products.
The whitening agent on the market at present is easy to be decomposed by the change of temperature in the using process, thereby affecting the normal use, has poor light resistance, and is easy to generate the phenomenon of yellowing after long-term use. Based on the above statement, the invention provides a fluorescent whitening agent with high light resistance and yellowing resistance and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a fluorescent whitening agent with high light resistance and yellowing resistance and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a fluorescent whitening agent with high light resistance and yellowing resistance is composed of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol.
Preferably, the organic acid is a monocarboxylic acid, a dicarboxylic acid or a tricarboxylic acid having 1 to 12 carbon atoms.
Preferably, the inorganic acid is carbonic acid, phosphoric acid, sulfuric acid, hydrochloric acid or nitric acid.
Preferably, the inorganic base is one or more of sodium hydroxide, sodium carbonate, sodium bicarbonate and potassium hydroxide.
Preferably, the emulsifier is one of nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether and polyoxyethylene fatty alcohol ether.
Preferably, the inorganic base is caustic soda, potassium hydroxide, calcium hydroxide, aluminum hydroxide, magnesium hydroxide, copper hydroxide, ferric hydroxide and the like.
A method for preparing the fluorescent whitening agent with high light resistance and yellowing resistance, which comprises the following steps:
s1: preparing a solution, namely adding diethylenetriamine and distilled water into a four-neck flask provided with a reflux condenser pipe, a thermometer and a stirrer for mixing, heating the four-neck flask to 50-70 ℃ and carrying out corresponding stirring, adding an adipic acid solution after stirring, continuing stirring, heating and stirring for reaction after automatic heat release is finished, and continuing adding distilled water after the reaction temperature is reduced to obtain a self-made polyamide solution for later use;
s2: preparing a mixed solution, namely adding diaminostilbene disulfonic acid and cyanuric chloride into the solution I obtained in the step S1 in sequence, heating, raising the temperature, uniformly stirring, controlling the temperature, adding organic acid and inorganic acid to control the pH value of the reaction solution to be 7-9, heating, raising the temperature, adding a proper amount of aniline, continuously heating, standing for 2-3 hours after the reaction is finished to obtain a mixed solution I for later use;
s3: preparing emulsion, namely mixing the corn modified starch and the polyvinyl alcohol according to the proportion of 4:3, adding a proper amount of emulsifier after stirring and mixing, then stirring at a high speed for 15-25 minutes, and putting the obtained mixture into an emulsifying bottle for later use;
s4: acid precipitation, namely mixing the mixed solution obtained in the step S3 with the mixed solution obtained in the step S2, adding 400 ml of deionized water after mixing, stirring, and adding a proper amount of hydrochloric acid after stirring for acid precipitation;
s5: and (4) obtaining a whitening agent, namely adding inorganic base into the mixed solution obtained in the step S4 for neutralization reaction, after the reaction is finished, drying the mixed solution in a dryer for 60 minutes, and after the drying, crushing the dried mixed solution in a crusher to enable the materials to become powder, thus obtaining the required high-light-resistance anti-yellowing fluorescent whitening agent.
Compared with the prior art, the invention has the beneficial effects that: the processing technology adopted by the invention is raw materials specified by national standards, the high-light-resistance anti-yellowing fluorescent whitening agent prepared by the invention is greatly improved, chemical components such as corn modified starch, polyvinyl alcohol and the like are added into the whitening agent, the whitening agent is mixed and produced according to a certain proportion, and the reaction time and the reaction temperature are strictly controlled, so that the light resistance and the yellowing resistance of the whitening agent can be greatly improved, and the fluorescent whitening agent has the characteristics of no toxicity and environmental protection in the using process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: a fluorescent whitening agent with high light resistance and yellowing resistance is composed of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol.
A method for preparing the fluorescent whitening agent with high light resistance and yellowing resistance, which comprises the following steps:
s1: preparing a solution, namely adding diethylenetriamine and distilled water into a four-neck flask provided with a reflux condenser pipe, a thermometer and a stirrer for mixing, heating the four-neck flask to 50 ℃ and carrying out corresponding stirring, adding an adipic acid solution after stirring, continuing stirring, heating and stirring for reaction after automatic heat release is finished, and continuing adding distilled water after the reaction temperature is reduced to obtain a self-made polyamide solution for later use;
s2: preparing a mixed solution, namely adding diaminostilbene disulfonic acid and cyanuric chloride into the solution I obtained in the step S1 in sequence, heating, raising the temperature, uniformly stirring, controlling the temperature, adding organic acid and inorganic acid to control the pH value of the reaction solution to be 7-9, heating, raising the temperature, adding a proper amount of aniline, continuously heating, standing for 2 hours after the reaction is finished to obtain a mixed solution I for later use;
s3: preparing emulsion, namely mixing the corn modified starch and the polyvinyl alcohol according to the proportion of 4:3, adding a proper amount of emulsifier after stirring and mixing, then stirring at a high speed for 15 minutes, and putting the obtained mixture into an emulsion bottle for later use;
s4: acid precipitation, namely mixing the mixed solution obtained in the step S3 with the mixed solution obtained in the step S2, adding 400 ml of deionized water after mixing, stirring, and adding a proper amount of hydrochloric acid after stirring for acid precipitation;
s5: and (4) obtaining a whitening agent, namely adding inorganic base into the mixed solution obtained in the step S4 for neutralization reaction, after the reaction is finished, drying the mixed solution in a dryer for 60 minutes, and after the drying, crushing the dried mixed solution in a crusher to enable the materials to become powder, thus obtaining the required high-light-resistance anti-yellowing fluorescent whitening agent.
Example two
The invention provides a technical scheme that: a fluorescent whitening agent with high light resistance and yellowing resistance is composed of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol.
A method for preparing the fluorescent whitening agent with high light resistance and yellowing resistance, which comprises the following steps:
s1: preparing a solution, namely adding diethylenetriamine and distilled water into a four-neck flask provided with a reflux condenser pipe, a thermometer and a stirrer for mixing, heating the four-neck flask to 60 ℃ and carrying out corresponding stirring, adding an adipic acid solution after stirring, continuing stirring, heating and stirring for reaction after automatic heat release is finished, and continuing adding distilled water after the reaction temperature is reduced to obtain a self-made polyamide solution for later use;
s2: preparing a mixed solution, namely adding diaminostilbene disulfonic acid and cyanuric chloride into the solution I obtained in the step S1 in sequence, heating, raising the temperature, uniformly stirring, controlling the temperature, adding organic acid and inorganic acid to control the pH value of the reaction solution to be 7-9, heating, raising the temperature, adding a proper amount of aniline, continuously heating, standing for 2 hours after the reaction is finished to obtain a mixed solution I for later use;
s3: preparing emulsion, namely mixing the corn modified starch and the polyvinyl alcohol according to the proportion of 4:3, adding a proper amount of emulsifier after stirring and mixing, then stirring at a high speed for 20 minutes, and putting the obtained mixture into an emulsion bottle for later use;
s4: acid precipitation, namely mixing the mixed solution obtained in the step S3 with the mixed solution obtained in the step S2, adding 400 ml of deionized water after mixing, stirring, and adding a proper amount of hydrochloric acid after stirring for acid precipitation;
s5: and (4) obtaining a whitening agent, namely adding inorganic base into the mixed solution obtained in the step S4 for neutralization reaction, after the reaction is finished, drying the mixed solution in a dryer for 60 minutes, and after the drying, crushing the dried mixed solution in a crusher to enable the materials to become powder, thus obtaining the required high-light-resistance anti-yellowing fluorescent whitening agent.
EXAMPLE III
The invention provides a technical scheme that: a fluorescent whitening agent with high light resistance and yellowing resistance is composed of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol.
A method for preparing the fluorescent whitening agent with high light resistance and yellowing resistance, which comprises the following steps:
s1: preparing a solution, namely adding diethylenetriamine and distilled water into a four-neck flask provided with a reflux condenser pipe, a thermometer and a stirrer for mixing, heating the four-neck flask to 70 ℃ and carrying out corresponding stirring, adding an adipic acid solution after stirring, continuing stirring, heating and stirring for reaction after automatic heat release is finished, and continuing adding distilled water after the reaction temperature is reduced to obtain a self-made polyamide solution for later use;
s2: preparing a mixed solution, namely adding diaminostilbene disulfonic acid and cyanuric chloride into the solution I obtained in the step S1 in sequence, heating, raising the temperature, uniformly stirring, controlling the temperature, adding organic acid and inorganic acid to control the pH value of the reaction solution to be 7-9, heating, raising the temperature, adding a proper amount of aniline, continuously heating, standing for 2 hours after the reaction is finished to obtain a mixed solution I for later use;
s3: preparing emulsion, namely mixing the corn modified starch and the polyvinyl alcohol according to the proportion of 4:3, adding a proper amount of emulsifier after stirring and mixing, then stirring at a high speed for 20 minutes, and putting the obtained mixture into an emulsion bottle for later use;
s4: acid precipitation, namely mixing the mixed solution obtained in the step S3 with the mixed solution obtained in the step S2, adding 400 ml of deionized water after mixing, stirring, and adding a proper amount of hydrochloric acid after stirring for acid precipitation;
s5: and (4) obtaining a whitening agent, namely adding inorganic base into the mixed solution obtained in the step S4 for neutralization reaction, after the reaction is finished, drying the mixed solution in a dryer for 60 minutes, and after the drying, crushing the dried mixed solution in a crusher to enable the materials to become powder, thus obtaining the required high-light-resistance anti-yellowing fluorescent whitening agent.
By performing component detection on three groups of examples, the detection results are as follows:
from the experimental data in the above table, it can be seen that in the present embodiment, when the heating temperature of the four-neck flask is 50 ℃ and the stirring time of the emulsion is 15 minutes, the light-resistant effect and the anti-yellowing effect are general, when the heating temperature of the four-neck flask is 60 ℃ and the stirring time of the emulsion is 20 minutes, the light-resistant effect and the anti-yellowing effect are good, and when the heating temperature of the four-neck flask is 70 ℃ and the stirring time of the emulsion is 25 minutes, the light-resistant effect and the anti-yellowing effect are good, so that when the heating temperature of the four-neck flask is higher and the stirring time of the emulsion is longer, the light-resistant effect and the anti-yellowing effect are better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high light-resistant anti-yellowing fluorescent whitening agent is characterized in that; the composite material consists of the following raw materials in percentage by mass: 70-80% of deionized water, 3-6% of diethylenetriamine, 4-6% of cyanuric chloride, 0.6-0.8% of aniline, 1-3% of inorganic base, 5-8% of hydrochloric acid, 0.5-0.8% of emulsifier, 3-5% of organic acid, 3-5% of inorganic acid, 1-3% of corn modified starch and 1-3% of polyvinyl alcohol.
2. A high light resistance anti-yellowing fluorescent whitening agent according to claim 1, characterized in that: the organic acid is a monocarboxylic acid, a dicarboxylic acid or a tricarboxylic acid having 1-12 carbon atoms.
3. A high light resistance anti-yellowing fluorescent whitening agent according to claim 1, characterized in that: the inorganic acid is carbonic acid, phosphoric acid, sulfuric acid, hydrochloric acid or nitric acid and the like.
4. A high light resistance anti-yellowing fluorescent whitening agent according to claim 1, characterized in that: the inorganic alkali is one or a mixture of sodium hydroxide, sodium carbonate, sodium bicarbonate and potassium hydroxide.
5. A high light resistance anti-yellowing fluorescent whitening agent according to claim 1, characterized in that: the emulsifier is one of nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether and polyoxyethylene fatty alcohol ether.
6. A high light resistance anti-yellowing fluorescent whitening agent according to claim 5, characterized in that: the inorganic alkali is similar alkali such as caustic soda, potassium hydroxide, calcium hydroxide, aluminum hydroxide, magnesium hydroxide, copper hydroxide, ferric hydroxide and the like.
7. A process for the preparation of a highly light-fast and anti-yellowing fluorescent whitening agent according to any of claims 1 to 6, characterized in that: the preparation method comprises the following steps:
s1: preparing a solution, namely adding diethylenetriamine and distilled water into a four-neck flask provided with a reflux condenser pipe, a thermometer and a stirrer for mixing, heating the four-neck flask to 50-70 ℃ and carrying out corresponding stirring, adding an adipic acid solution after stirring, continuing stirring, heating and stirring for reaction after automatic heat release is finished, and continuing adding distilled water after the reaction temperature is reduced to obtain a self-made polyamide solution for later use;
s2: preparing a mixed solution, namely adding diaminostilbene disulfonic acid and cyanuric chloride into the solution I obtained in the step S1 in sequence, heating, raising the temperature, uniformly stirring, controlling the temperature, adding organic acid and inorganic acid to control the pH value of the reaction solution to be 7-9, heating, raising the temperature, adding a proper amount of aniline, continuously heating, standing for 2-3 hours after the reaction is finished to obtain a mixed solution I for later use;
s3: preparing emulsion, namely mixing the corn modified starch and the polyvinyl alcohol according to the proportion of 4:3, adding a proper amount of emulsifier after stirring and mixing, then stirring at a high speed for 15-25 minutes, and putting the obtained mixture into an emulsifying bottle for later use;
s4: acid precipitation, namely mixing the mixed solution obtained in the step S3 with the mixed solution obtained in the step S2, adding 400 ml of deionized water after mixing, stirring, and adding a proper amount of hydrochloric acid after stirring for acid precipitation;
s5: and (4) obtaining a whitening agent, namely adding inorganic base into the mixed solution obtained in the step S4 for neutralization reaction, after the reaction is finished, drying the mixed solution in a dryer for 60 minutes, and after the drying, crushing the dried mixed solution in a crusher to enable the materials to become powder, thus obtaining the required high-light-resistance anti-yellowing fluorescent whitening agent.
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| CN107674670A (en) * | 2017-10-16 | 2018-02-09 | 王若梅 | A kind of preparation method of the high fluorescent whitening agent of resistance to light type |
| CN111349349A (en) * | 2020-04-13 | 2020-06-30 | 南京旭美化工有限公司 | High-light-resistance fluorescent whitening agent and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107674670A (en) * | 2017-10-16 | 2018-02-09 | 王若梅 | A kind of preparation method of the high fluorescent whitening agent of resistance to light type |
| CN111349349A (en) * | 2020-04-13 | 2020-06-30 | 南京旭美化工有限公司 | High-light-resistance fluorescent whitening agent and preparation method thereof |
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