| http://www.w3.org/ns/prov#value | - Examples of such high acrylonitrile resins are graft copolymers obtained by the polymerisation of (a) 99.5 to 50% by weight of a monomeric material containing (i) at least 50% by weight of acrylonitrile and (ii) 0 to 50% by weight of at least one comonomer, such as styrene or an alkyl acrylate or methacrylate, e.g. methyl acrylate, in the presence of (b) 0.5 to 50% by weight of a butadiene) acrylo
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