Patent ID: 6740703
Filing Date: 2004-05-25
Classification: C09D

Abstract:
A thickened aqueous coating composition of a chosen pH, comprising: a polymeric binder and a macromolecular thickener a) which thickener contains macromolecules having moieties which are hydrophilic at the chosen pH and wherein the macromolecules are cellulose-free and also contain autoxidisable moieties thereby creating a cellulose-free autoxidisable thickener, and b) which thickener has particles that in the unneutralised state have a number average particle size of below 500 nm and which thickener on dispersion in water at a concentration of 2 wt % (based on the combined weights of the thickener and water) has a low shear viscosity of at least 0.1 Pa.sec when measured at 18.degree. C. on a Brookfield viscometer using a No. 3 Spindle rotating at 12 rpm.