| http://www.w3.org/ns/prov#value | - The initiator accordingly contains at least one, preferably one or two, more preferably two, reactive groups which enable it to attach to polymer I. In the case of a polyurethane as polymer I the reactive groups in question may be isocyanate groups or isocyanate-reactive groups, e.g. hydroxyl groups, amino groups or carboxylate groups.
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