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 1 to 26% of non-volatile organic liquid having a vapour pressure up to 1.3 N/m 2 at 25°C and comprising a mixture of polyethylene glycol (PEG) and polypropylene glycol (PPG)
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 %.