A process for improving the rheological properties of a aqueous suspension of a clay mineral

摘要

1481307 Clay suspensions ENGLISH CLAYS LOVERING POCHIN & CO Ltd 23 Oct 1974 [2 Nov 1973] 51119/73 Heading C1A The viscosity at a given solids content of an aqueous solution of a clay mineral is reduced by mixing the aqueous suspension with a minor proportion by weight of a water-soluble organic compound having a plurality of basic groups and a number average molecular weight not greater than 1000. The organic compound, which is preferably used in a proportion of 1 wt.%, based on the dry clay mineral, and added as a 0À1 to 20 w/v% aqueous solution, may be one or more of a polyethyelne imine, ethylene diamine, 1, 12 dodecane diamine, diethylene triamine, tetraethylene pentamine, and hexamethylene tetramine. After treatment, the clay mineral is preferably subjected to mechanical working in the plastic state. The treated clay is suitable for use in coating papers.