The difference is in the thickener's effectiveness in the different areas where the paint is sheared. Low-shear thickeners impart a viscosity that can be measured with Brookfield (ASTM D2196 method A) and this is the viscosity that gives the paint in-can rheology. Mid-shear thickeners in turn give the viscosity responsible for sagging and give the viscosity to be measured in KU with a Stormer viscometer. The last group of thickeners are high-shear thickeners, the effectiveness of which cannot be measured with Brookfield, and with ICI cone-plate viscometers at speeds from several thousand to 10,000 1 / s and higher. They are responsible for imparting viscosity at high shear rates during brushing, spraying, etc. My article "Best practices in evaluation of rheological additives" will appear in the July issue of PCI magazine, which will discuss the principles of operation of various thickeners in detail in case studies.
@@SpektrochemResearchLaboratory thank you so much for taking your time to answer my question. I will search your article in July. Absolutely. Thanks again.
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Can you tell me about the difference of high shear and low shear thickener? I am trully grateful!
The difference is in the thickener's effectiveness in the different areas where the paint is sheared. Low-shear thickeners impart a viscosity that can be measured with Brookfield (ASTM D2196 method A) and this is the viscosity that gives the paint in-can rheology. Mid-shear thickeners in turn give the viscosity responsible for sagging and give the viscosity to be measured in KU with a Stormer viscometer. The last group of thickeners are high-shear thickeners, the effectiveness of which cannot be measured with Brookfield, and with ICI cone-plate viscometers at speeds from several thousand to 10,000 1 / s and higher. They are responsible for imparting viscosity at high shear rates during brushing, spraying, etc.
My article "Best practices in evaluation of rheological additives" will appear in the July issue of PCI magazine, which will discuss the principles of operation of various thickeners in detail in case studies.
@@SpektrochemResearchLaboratory thank you so much for taking your time to answer my question. I will search your article in July. Absolutely. Thanks again.
@@Hangle1507 You're welcome. Stay tuned!
@@SpektrochemResearchLaboratory Hi Sir!
Can you please send me the link of your article?
I appreciate❤️