Imperial Chemical Industries has ob-tained a patent for a pigmented,aqueous coating comprised of an aqueous disper-sion of non-crosslinkable addition oligo-mer of weight average molecular weight of 5000 to 15000 Daltons and calculated Fox Tg greater than 0°C and less than 50°C,an aqueous dispersion of addi-tion polymer of weight average molecu-lar weight greater than 53,000 Daltons,calculated Fox Tg greater than 10°C and less than 40°C and mean particle diam-eter of less than 150 nanometers and the ratio is from 0.25:1 to 2.70:1 based on%weight dispersion solids and a pigment,and wherein the composition has an open time of 6±1 to 12±3 minutes,and never more than 15 minutes;and when dry has a gloss of at least 75%.
Source:
http://www.coatingsworld.com/issues/2012-12/view_patents/imperial-chemical-industries-patents-low-voc-coating/
