| 摘要 |
<p>An aqueous coating composition having a PVC of from 78 to 88% comprising, based on the total volume solids of the dry coating unless otherwise stated, a) opacifying pigment particles comprising: i) from 3 to 10% titanium dioxide, ii) from 0 to 20% of hollow polymeric particles; b) non-opacifying extender particles comprising: i) calcium magnesium carbonate, and/or ii) calcium carbonate, and/or iii) nepheline syenite, and/or iv) kaolin, wherein, i)+ii)+iii)+iv) = 40 to 80% and iv) is 0 to 20%; c) polymer binder particles of calculated Fox Tg of from 25 to 70°C having an acid value of from 15 to 65mg KOH/g of polymer and wherein the polymer particles are derived from acrylic monomers and optionally further comprising styrene and/or its derivatives; d) dispersant having a weight average molecular weight of at least 3500 Daltons; e) fugitive coalescing solvent, wherein the composition is free of non- fugitive coalescing solvent.</p> |
