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5323750 
Journal Article 
Improved processing of highly filled calcium carbonate compounds 
Fulmer, M; Vander Kooi, J; SPE; SPE 
2000 
2791-2795 
WOS:000171593500527 
Calcium carbonate treated with an interfacial agent, such as stearic acid or stearate, will typically wet or lubricate its surface resulting in lower viscosity than untreated calcium carbonate, In this paper, the effects of fatty acid derivatives on highly filled calcium carbonate both treated and untreated, in polypropylene compounds will be discussed. The use of fatty acid derivatives can be effective for lowering extrusion pressure, leading to throughput increases. The overall effect on filler addition, viscosity, mixing and processing properties will be shown for one class of fatty acid derivative.