| http://www.w3.org/ns/prov#value | - 1.1) 50 to 99, preferably 60 to 80 parts by weight vinyl aromatics and/or vinyl aromatics substituted in the ring such as styrene, ??-methylstyrene, p-methylstyrene, p-chlorostyrene and/or methacrylic acid-(C1???C8)-alkyl esters such as methyl methacrylate and ethyl methacrylate and
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