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Red naphtocyclinon solvent dye and preparation method thereof
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A technology for solvent dyes and naphthocyclic ketones, applied in azo dyes, organic dyes, chemical instruments and methods, etc., can solve the problems of lack of transparency and toxic and harmful substances, and achieve easy operation, excellent heat resistance, and high yield. Effect
Inactive Publication Date: 2011-08-17
海宁市现代化工有限公司
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Problems solved by technology
The current red solvent dyes are still insufficient in fastness, transparency and control indicators of toxic and harmful substances
Method used
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Embodiment 1
[0018] In a four-neck flask equipped with a thermometer, a stirrer, a water separator and a condenser, add 8.1 grams of 1,8 diaminonaphthalene (0.05 moles), 16 grams of tetrachlorophthalic anhydride (0.055 moles), and 250 milliliters of ethylene glycol , 0.5 g of pyridine, stirred and heated to 140 ° C, and kept for 4 hours. During the reaction process, a red naphthylcyclone dye is formed at about 80°C, and a small amount of water and ethylene glycol mixture is distilled out at above 100°C. After completion of the reaction, stir and cool to 40°C, filter, wash the filter cake with 100 ml of ethanol, wash with water, and dry to obtain 19.5 g of red naphthyrone solvent dye.
Embodiment 2
[0020] In a four-necked flask equipped with a thermometer, a stirrer, a water separator and a condenser, add 8.1 grams of 1,8 diaminonaphthalene (0.05 moles), 15.3 grams of tetrachlorophthalic anhydride (0.0525 moles), 0.5 grams of quinoline and 200 mL of DMF, stirred and heated to 130°C, and kept for 5 hours. During the reaction process, a red naphthylcyclone dye is formed at about 80°C, and a small amount of water and DMF mixture is distilled out at above 100°C. After completion of the reaction, stir and cool to 40°C, filter, wash the filter cake with 100 ml of ethanol, wash with water, and dry to obtain 19.1 g of red naphthyrone solvent dye.
Embodiment 3
[0022] In a 500 ml pressurized container equipped with a thermometer and a stirrer, add 8.1 grams of 1,8 diaminonaphthalene (0.05 moles), 16 grams of tetrachlorophthalic anhydride (0.055 moles), 150 milliliters of water, 12 milliliters of ethanol and 70 milliliters of 30 % hydrochloric acid, stirred and heated up to 102°C, and kept for 12 hours. After completion of the reaction, stir and cool to 40°C, filter, wash the filter cake with 100 ml of ethanol, then wash with water until neutral, and dry to obtain 19.9 g of red naphthyrone solvent dye.
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Abstract
The invention relates to a red naphtocyclinon solvent dye and a preparation method thereof. The red high-purified solvent dye has a general formula shown as follow, wherein R is H or CH3 and X is Br or Cl. The solvent dye is prepared by the following steps: condensation reaction of substituted 1,8-diaminonaphthalene and tetrahalogenated benzene at a high temperate in the presence of organic solvents and catalysts, cooling, filtration, refining of the filter cake and drying. The red solvent dye has single component and high purity, is dedicated to dyeing engineering plastics and dyeing polyester fibers before spinning, and has the advantages of good heat resistance, light fastness and acid and alkali resistance, bright color and high transparency. The solvents used in the preparation process are recoverable. The red solvent dye is environment-friendly.
Description
technical field [0001] The invention relates to a solvent dye and a preparation method thereof, in particular to a red naphthylcyclone solvent dye used for engineering plastic coloring and polyester fiber pre-spinning coloring and a preparation method thereof. Background technique [0002] Solvent dyes are special dyes for polystyrene, ABS, polycarbonate, polyester and other engineering plastics. They have the advantages of bright color, high transparency and good application performance. Some solvent dyes are also important varieties used for pre-spinning coloring of polyester fibers. [0003] With the rapid development of engineering plastics, there are higher and higher requirements for heat resistance, light fastness, color brightness, transparency and other indicators. The concept makes the pre-spinning coloring of polyester fibers more and more important. The current red solvent dyes are still insufficient in fastness, transparency and control indicators of toxic and...
Claims
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Application Information
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