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Paint pigments

Paint pigments

Paint pigments

(OP)
Hello all,

I heard from someone that there are paint pigments that are currently encapsulated in silicon (for what reason I'm not sure) but I haven't been able to find any information concerning this.

Can anyone suggest a good place to start? Thanks very much.

RE: Paint pigments

Perhaps he meant silicone or was refering to silane surface treatments. Silicon make no sense in this context.

RE: Paint pigments

(OP)
Thanks for the reply, Compositepro. I found it's silica. Pigment manufacturers use a slurry of the pigment together with a sodium silicate solution at a particular pH to coat the pigments. (Process has actually been around since the 1970s... just looked in the wrong places...)

I have read that it is the hydrophilicity of the pigment surface that enables silica to deposit and form a coating. Does anyone know of another reason that I may not be aware of?

RE: Paint pigments

Sodium silicate is also know as water glass. I believe its main function is as a high temperature binder. So those pigments are probably used for high temperature paints.

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