| http://www.w3.org/ns/prov#value | - from 1 to 4 carbon atoms, such as for example vinyl toluene, divinyl benzene, ??-methyl styrene, tert.-butyl styrene, chlorostyrenes; vinyl esters of carboxylic acids containing from 2 to 6 carbon atoms, preferably vinyl acetate; vinyl pyridine, vinyl naphthalene, vinyl cyclohexane, acrylic acid and methacrylic acid and/or their esters (preferably vinyl, allyl and methallyl esters) containing from
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