A kind of preparation method and application of dicyandiamide-formaldehyde polymer
An oxymethylene polymer and dicyandiamide technology, applied in the polymer field, can solve the problems of high cost and high proportion of dicyandiamide, and achieve the effects of low production cost, reduced dosage, and simple process operation.
Active Publication Date: 2016-08-17
苏州盛泽科技创业园发展有限公司
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Problems solved by technology
The disadvantage of this patent is that the proportion of dicyandiamide is still relatively high
[0004] The Chinese patent "A Slightly Acidic Liquid Dicyandiamide Formaldehyde Polymer and Its Application in the Printing and Dyeing Industry" with the application number 201210153455.8 discloses a slightly acidic liquid dicyandiamide formaldehyde polymer whose weight component is dicyandiamide 100 parts, 158-162 parts of formaldehyde solution with a mass concentration of 36%, 65-68 parts of ammonium chloride, and 20-24 parts of inorganic strong acid with a mass concentration of 20%, the proportion of the patented dicyandiamide is nearly 1 / 3, High, and the cost is high due to the addition of strong inorganic acids
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Add 0.52 mol of dicyandiamide and 0.56 mol of ammonium chloride into a three-necked flask with a temperature control device, slowly add 1.2 mol of formaldehyde with a mass concentration of 38% preheated to 40°C into the flask, and keep stirring at a constant stirring speed After adding, control the temperature at 80°C and react for 2 hours. The obtained colorless viscous liquid is dicyandiamide-formaldehyde polymer, and the measured solid content is 52.3%.
Embodiment 2
[0024] Except that the molar weights of dicyandiamide, ammonium chloride and formaldehyde are respectively 0.6mol, 0.64mol and 1.8mol, other conditions are the same as in Example 1;
Embodiment 3
[0026] Except stirring speed is 100rpm, other conditions are with embodiment 1;
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Abstract
The invention discloses a preparation method and application of a dicyandiamide-formaldehyde polymer. By controlling the molar ratio of dicyandiamide, ammonium chloride and formaldehyde to 0.52~0.60:0.56~0.64:1.2~1.8 and the reaction temperature and stirring Speed realizes reducing dicyandiamide consumption to produce dicyandiamide-formaldehyde polymer, and the present invention is simple to operate, and cost is low.
Description
technical field [0001] The invention relates to a polymer, in particular to a preparation method and application of a dicyandiamide-formaldehyde polymer. Background technique [0002] Dicyandiamide-formaldehyde polymer was originally used as a color-fixing agent in printing and dyeing auxiliaries, and later it was found that it has the effect of coagulating national colors. After research and improvement by many people, it has been mass-produced and used in the treatment of various printing and dyeing wastewater. It has good decolorization and COD reduction effects, and has good application value. However, due to the high price of dicyandiamide, its use cost is relatively high, which makes it difficult to popularize and use it. In addition to dicyandiamide, formaldehyde, ammonium chloride, additives such as urea or aluminum sulfate have also been added in the raw material used in the improved cyanamide-formaldehyde polymer synthetic method, attempt to reduce the usage amoun...
Claims
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IPC IPC(8): C08G12/16C02F1/56
Inventor 蔡哲宇庄晓曦
Owner 苏州盛泽科技创业园发展有限公司