2020 Volume 63 Pages 37-43
Calcium carbonate with nano-level “particle control” and “surface treatment” is used as functional filler in various applications, and it provides excellent rheological properties especially to sealants and adhesives. However, the mechanism related to the high viscosity and its control method were unknown. Therefore, in order to clarify the mechanism for high viscosity of the sealant and adhesive in which the calcium carbonate particles are dispersed, the viscosity of confined liquid plasticizer between the surfaces imitating the particle surface of calcium carbonate is measured using shear resonance measurement system. Then, it turns out that the mechanism for high viscosity of calcium carbonate is a unique mechanism different from other materials (fumed silica and organic thickeners), so I will introduce it in detail.
