Aqueous surface coating material prepared by emulsion polymerization
AssigneeCrown Decorative Products Limited
InventorsChristopher J. Tonge, John P. Tomlinson, Thomas Graham
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Abstract
A water-based emulsion paint, for example, is formulated with high refractive index opacifying pigment particles, dispersant, and polymer particles in which substantially all of the pigment particles (40) are disjuncted from one another and contained within an attached cluster of polymer particles (41) or have appendant polymer particles to give opacifying units having a nodular outline. Preferably micro-voids are trapped between particles and the dispersant is less than 1% of the pigment by weight.
Claims13
An aqueous surface coating material containing opacifying units prepared in an emulsion polymerisation process in the presence of high refractive index opacifying pigment particles dispersed in a water phase before monomer is added, the units being characterised in that substantially all of the opacifying pigment particles in the units are disjuncted from one another and have non-enveloping appendant polymer particles to give a nodular outline.
Dependencies are inferred from the claim text.