LOW VOC COLORANT COMPOSITIONS

摘要

An aqueous liquid colorant composition having a volatile organic content up to 50g/l and suitable for colouring aqueous or solventborne architectural coatings and basepaints comprising based on the total weight of the composition, i) from 0 to 26% of non-volatile organic liquid having a vapour pressure up to 1.3 N/m2 at 25°C ii) from 2 to 13% of stabilising agent iii) from 4 to 77% of colour pigment iv) from 0 to 8% of rheology modifying clay v) from 0 to 20% of extender wherein the ratio of the combined weight of iii)+iv)+v) : the combined weight of i)+ii) is from 0.8 to 2.75: 1 and the combined weight of the non- volatile organic liquid i) and the stabilising agent ii) is no greater than 24% and the combined weight of the rheology modifying clay iv) and the extender v) is at least 2% when the amount of colour pigment is less than 51%.