| http://www.w3.org/ns/prov#value | - f a core (a.) constituting a crosslinked silicone rubber, and of a shell (b.) constituting a crosslinked alkyl acrylate rubber, the ratio by weight of the core (a.) to the shell (b.) being 0.1:99.9 to 90:10, preferably 10:90 to 50:50, and having an average particle diameter (d50) of 0.05 to 10 ??m, preferably 0.1 to 2 ??m and particularly preferably 0.1 to 1 ??m, and C. 0 to 80 parts by weight, pr
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