| 摘要 |
A composition for forming a self-cleaning, de-polluting coating is disclosed, which comprises:(i) photocatalytic titanium dioxide; (ii) a binder component comprising a polysiloxane polymer and optionally one or more of an organic polymer selected from styrene polymer, styrene copolymer, acrylic polymer, acrylic copolymer, a styrene-acrylic copolymer and mixtures thereof; and (iii) an extender component comprising a mixture of calcium carbonate and an alternate extender, which is flash calcined kaolin clay;wherein the composition is capable of providing a coating on a substrate having superior durability as compared to an otherwise identical coating which does not comprise said alternate extender.
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