All about carbon filler

[cicididi]

Accordingly in a first aspect, the present invention provides a cohesive polymer matrix comprising a matrix polymer and a coated particulate carbon filler dispersed therein, characterised in that the matrix polymer is an emulsion rubber, and the filler is coated at least in part with a composition comprising an organic coating polymer of number average molecular weight of 4,500 to 200,000, which contains an acidic group (or a precursor thereof) and an unsaturated group, optionally linked to the matrix polymer.
The polymer matrix may comprise more than one emulsion rubber, at least one other polymer or oligomer, and/or more than one particulate filler provided that at least one such filler is coated as described hereinbefore