Coating classification: leveling of coating

The core tip: whether the coating can achieve the smooth and even characteristics after construction becomes leveling The viscosity of latex coating is a pseudoplastic fluid, which depends on the shear force and shear time With the increase of shear speed or shear time, the viscosity of the coating will decrease, stop shearing and return to the original viscosity The recovery time of different kinds of coatings is different Some coatings only need a few seconds, and some coatings need a few hours to recover to the original viscosity, because the thixotropy of the coatings is different The paint with small thixotropy has good fluidity and recovers to the original Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Coating home news: whether the coating can achieve the smooth and even characteristics after construction, become leveling The viscosity of latex coating is a pseudoplastic fluid, which depends on the shear force and shear time With the increase of shear speed or shear time, the viscosity of the coating will decrease, stop shearing and return to the original viscosity The recovery time of different kinds of coatings is different Some coatings only need a few seconds, and some coatings need a few hours to recover to the original viscosity, because the thixotropy of the coatings is different The coating with small thixotropy has a good fluidity, a long time to restore the original viscosity and a good leveling property The flow of the coating requires a small force, indicating that the yield value of the coating is small, and the weight of some coatings is enough to flow The yield value of the paint with poor fluidity is large, and the paint flow needs large force, so it is difficult to level the paint The result of poor flow leveling of paint: the smoothness of paint coating is low, and the brushmarks are serious, which affects the luster, dry covering ability and hand feeling of paint coating The reason of poor fluidity of coating: large thixotropy of coating, fast recovery of viscosity of coating, no time leveling The low shear viscosity and high shear viscosity are not enough The fluidity of coating is not good, the type or dosage of wetting agent used in coating production is not appropriate, the interface force between pigment and filler and polymer is large, and the fluidity is poor Improve the flow / leveling property of the coating: if the thixotropy is too large, if the finished coating has appropriate low shear viscosity and lacks high shear viscosity, you can add Cognis leveling agent dsx2000 and dsx3075; if the viscosity of the finished coating is too high, add dsx2000 and hydropalat436, and add glycol and propylene glycol appropriately Adjust the production formula, change the combination of thickening system, appropriately reduce the dosage of hydrated polymer thickener, and increase the appropriate polyamine ester thickener Adjust the interfacial force between pigments and fillers and polymer, improve the fluidity of paint, select hydropalat436, reduce the interfacial tension between pigments and fillers and polymer, and improve the compatibility and micro uniformity of paint 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,