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[Information of Tu Society] Three types of water-based paint process upgrades, B1B2, 3C2B, and 3C1B!
Time of Update: 2021-05-07
Keywords: water-based topcoat; coating process; upgrading and transformation 1 background and current situation my country's automobile coating production line built before 2012, the paint materials mainly use traditional solvent-based topcoats, which are far behind in terms of environmental protection, safety, quality, etc.
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【Tu Xuehui Science】Classification and order guide of polar solvents
Time of Update: 2021-05-07
The polarity of various compounds increases in the following order: —CH3, —CH2—, —CH=, —C3, —O—R, —S—R, —NO2, —N(R)2, —OCOR, — CHO, —COR, —NH2, —OH, —COOH, —SO3H1, strong polar solvent methanol>ethanol>isopropanol2, medium polar solvent acetonitrile>ethyl acetate>chloroform>dichloromethane>diethyl ether>toluene 3.
Non-polar solvent cyclohexane>petroleum ether>hexane>pentane 4.
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【Tu Xuexue News】The Ministry of Industry and Information Technology has taken action | Chemical raw materials skyrocketed
Time of Update: 2021-05-07
The prices of major products in the steel, nonferrous, petrochemical and other industries continued to rise at the end of last year, and the prices of raw materials rose sharply.
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[Information of Tu Society] The road to water-based mechanical coatings is a long way to go!
Time of Update: 2021-05-07
The main function is to fill the bottom substrate, isolate the defects of the primer layer, improve the fullness of the topcoat and other decorative properties, enhance the adhesion of the topcoat to the coating, increase the thickness of the entire supporting coating, and improve the entire The water resistance and anti-corrosion performance of the coating.
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Waterborne two-component polyurethane coating composition and the latest development direction!
Time of Update: 2021-04-27
It is characterized by low relative molecular weight, small dispersion particle size (Dn=10～200nm), superior dispersibility to the curing agent, good appearance of the formed coating film, and excellent overall performance.
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One way to improve the hiding power of white ink
Time of Update: 2021-04-27
In addition, the smoothness of the edge of the cell and the thickness of the chrome plating also affect the transfer of the ink, so the method of printing twice can be considered to solve the problem caused by the plate cylinder.
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[Information of Tu Society] Why is it difficult to "change oil to water"?
Time of Update: 2021-04-23
At the same time, the use of oil-based paint construction requires much higher capital investment in equipment maintenance and hazardous waste and solid waste management.
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[Science Popularization of the Coating Society] Five surface modification methods and characteristics of nano-barium sulfate
Time of Update: 2021-04-23
However, on the one hand, nano-barium sulfate has hydrophilic and oleophobic properties, and there is a great difference in polarity with the polymer matrix, so it is easy to agglomerate in the polymer, and its dispersibility is poor, which reduces its mechanical properties; on the other hand, due to the nanometer Barium sulfate has high surface activity, and it is easy to agglomerate or agglomerate between adjacent particles, which affects its application in production.
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【Coating Society Information】Common problems and analysis of paint color paste application you have to know
Time of Update: 2021-04-23
1. The color paste is added to the paint, and the color floats on the surface. Reasons: 1) The surface tension difference between the color paste and the paint is too large. The paint generally use
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[Science of the Society of Coatings] Research on the performance of graphene waterborne anticorrosive coating
Time of Update: 2021-04-23
It can be seen from the data that as the amount of dispersant increases, the viscosity of the dispersed curing agent component becomes smaller; in order to investigate the thixotropy of the coating, it is found at different speeds.
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【Popularization of Coating Society】Inspection and storage of paint
Time of Update: 2021-04-19
The serious ones are improper selection of white paste-like diluent or excessive dosage, room temperature is too low, relative humidity is too large, container is not tightly closed, internal moisture content, lead-based drier dosage When there is too much slight turbidity, add turpentine, butanol or benzene cyclic hydrocarbon solvent, heat to 60-65C with water barrier, control the room temperature at 18-25C, and the relative humidity at 65% +5%.
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[Science popularization of the Tu Society] Paint engineering science popularization encyclopedia, the decoration depends on it!
Time of Update: 2021-04-18
2. Clear oil: also known as cooked oil and lacquer oil, it is one of the basic paints for decorating doors and windows, wall skirts, heating covers, and supporting furniture in home decoration.
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【Coating Society Information】Commonly used technical parameters and calculation methods for paint coating
Time of Update: 2021-04-18
According to this definition, we can get the following calculation formula for the coating rate of liquid paint under any given dry film thickness (expressed in square meters per liter): For example: the volume solid content of inorganic zinc-rich primer is 63% , The dry film thickness is specified as 75um, and the theoretical coating rate is calculated: 05 Actual coating rate The actual coating rate is the percentage of the theoretical coating rate minus the loss.
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[Popularization of Coating Society] Causes and control methods of air bubbles in paint
Time of Update: 2021-04-18
Generally, organic coatings are coated on inorganic substrates, and blistering is prone to occur when the surface temperature is high.
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[Society News] Warmly welcome the new president of Shenzhen Coatings Technology Society, the director of the Technical Expert Committee, and the director of the Intellectual Property Working Committee to visit the Secretariat of Shenzhen Coating Science
Time of Update: 2021-04-14
; Huang Yonghan, the director of the Coating Professional Committee of the Guangdong Paint Industry Association; and Zhong Si, the general manager of Foshan Jinlei Technology Co.
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[Popularization of Tu Xuehui] Principle and technical route of anti-graffiti coating
Time of Update: 2021-04-14
The coating film has low surface tension and can be used for anti-sticking and anti-graffiti At the same time, it has certain anti-corrosion and anti-aging characteristics.
Water and oil repellent, prevent graffiti paint from penetrating into the substrate, play an anti-graffiti effect, and also have an anti-sticking function.
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Waterborne two-component polyurethane coating composition and the latest development direction!
Time of Update: 2021-03-27
It is characterized by low relative molecular weight, small dispersion particle size (Dn=10～200nm), superior dispersibility to the curing agent, good appearance of the formed coating film, and excellent overall performance.
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One way to improve the hiding power of white ink
Time of Update: 2021-03-26
In addition, the smoothness of the edge of the cell and the thickness of the chrome plating also affect the transfer of the ink, so the method of printing twice can be considered to solve the problem caused by the plate cylinder.
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[Information of the Coating Society] Application and promotion of additives in water-based coatings!
Time of Update: 2021-03-22
At present, the additives used in water-based coatings can be divided into production and construction, which mainly include additives added during the production process, additives added during the construction process, additives for improving film-forming properties, and other functional additives.
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【Coating Society Information】Discussion on the pollution prevention and control methods of VOC produced in coatings!
Time of Update: 2021-03-22
In the prevention and control of VOC pollution, it is necessary to strengthen on-site management and strengthen The improvement of process equipment and the active research and development of new coating products and other aspects of manpower to reduce the pollution caused by VOC in the production of coatings.
