Patent ID: 8038787
Filing Date: 2011-10-18
Classification: C08K,C09D

Abstract:
1. A coating formulation, comprising: (1) 5%-99.5% by weight of solids of a polymer component or a mixture of two or more physically or chemically crosslinking polymer components; (2) 0.5-15% by weight of solids of at least one silicon dioxide surface modified with a moiety selected from the group consisting of a polyorganosiloxane, a modified polyorganosiloxane, and a combination thereof; and (3) 0%-80% by weight of at least one solvent or dispersing medium; wherein: the coating formulation is a matted thixotropic coating formulation, a pseudoplastic coating formulation, or a combination thereof; the viscosity of the coating formulation as measured in a state of low shear (6 rpm) after preparation with the surface-modified silicon dioxide and 1 day's storage of the preparation at 23° C. and 50% relative humidity (rh) is lower by not more than 40% than the viscosity of an otherwise identical coating formulation without a surface-modified silicon dioxide, as measured in a state of low shear (6 rpm), following preparation of the otherwise identical coating formulation and 1 day's storage thereof at 23° C. and 50% rh; the viscosity of the coating formulation as measured in a state of high shear (60 rpm) after preparation with a surface-modified silicon dioxide and 1 day's storage of the preparation at 23° C. and 50% relative humidity (rh) is lower by not more than 25% than the viscosity of an otherwise identical coating formulation without a surface-modified silicon dioxide, as measured in a state of high shear (60 rpm), following preparation of the otherwise identical coating formulation and 1 day's storage thereof at 23° C. and 50% rh; the at least one silicon dioxide surface modified with a polyorganosiloxane, a modified polyorganoxiloxane, or a combination thereof is surface modified with a polyether-modified polyorganosiloxane, a (meth)acrylate-modified polyorganosiloxane, or a poly(meth)acrylate-modified polyorganosiloxane having the following general structure: the coating formulation comprises at least one surface-modified silicon dioxide having a DBP (anhydrous) of 100-600 g/100 g; and the at least one silicon dioxide surface modified with a moiety selected from the group consisting of a polyorganosiloxane, a modified polyorganosiloxane, and a combination thereof has a carbon content of 0.5-30%.