Coating technology: Determination of emulsion properties of Waterborne Coatings

Core tip: at present, environmental pressure is affecting the global coating industry Therefore, the development and promotion of low VOC and even zero VOC environmental protection coatings is the general trend, and the application and research of water-based coating technology are paid more attention The key to study waterborne coatings is to develop emulsion suitable for waterborne coatings This paper mainly introduces the main detection methods of waterborne coatings emulsion 1 Determination of pH value of waterborne coatings emulsion Phs-3c acidimeter was used for determination 2 Viscosity determination Lnd1-tu-4 viscometer was used Calculation of viscosity Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Coating home news: at present, environmental pressure is affecting the global coating industry Therefore, the development and promotion of low VOC and even zero VOC environmental protection coatings is the general trend, and the application and research of water-based coating technology are paid more attention The key to study waterborne coatings is to develop emulsion suitable for waterborne coatings This paper mainly introduces the main detection methods of waterborne coatings emulsion 1 The pH value of emulsion for waterborne coatings is determined by PHS value= "3" numbertype= "1" negative= "True" hasspace= "False" >-3C acidity meter 2 Lnd1-tu-4 viscometer was used for viscosity measurement The formula of viscosity is derived from the instruction manual of the instrument The following is shown as follows: t=0.223u+6.0t - Determination of the outflow time (s) U - viscosity (mm 2/s) K=T/tK=0.98 T - standard outflow time (s) 3, solid content determination of the weighing bottle weighing accurately and cleanly, adding value= about "2" numbertype= "1" negative= "value=", "Hou", "emulsion" after weighing accurately, at "110", "1" Negative = "false" hasspace = "false" > bake in an oven at 110 ℃ for about 2 hours, take it out and put it into a dryer to cool it to room temperature, and then accurately weigh it The formula is as follows: W=m 2/m 1 W solid content M 1 - dry sample quality 2 m - dry sample quality 4, Ca 2+ stability test, 16ml emulsion is added to 20ml calibration tube, plus 4ml 5%Cacl 2 solution, shake well and place static If there is no gel and no layer phenomenon, then chemical stability is qualified If there is stratification, measure the height of the upper supernatant and the lower sediment, the higher the height of the supernatant and sediment, the worse the stability of calcium ion 5, the conversion rate is measured by taking part of the emulsion about value= "2" numbertype= "1" negative= "False" hasspace= "False" >2g, adding a suitable inhibitor of hydroquinone solution (1%) to terminate the reaction, and then baking it in constant temperature at 60 degrees oven The formula is as follows: G=m 4/m 3G - conversion rate M 3 - polymer net mass m 4 - the actual monomer mass 6, water absorption rate in emulsion is added to the emulsion according to the quality of styrene acrylic emulsion 15%, three ethylene four amine curing agent is mixed evenly, pour on polytetrafluoroethylene board, solidify at room temperature for one week, make thickness value= "1" numbertype= "1" negative= "False" hasspace= "False" The uniform film with a mass of is called the glue film, which is immersed in the deionized water at a temperature of value = "25" numberType = "1" negative = "false" hasspace = "false" > 25 ℃ for 24 hours, and then the surface water is accurately weighed by the filter paper, so the water absorption is (M 6-m 5) / M5 Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,