Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR2## B is one of several specified groups, such as ##STR3##...http://www.google.de/patents/US6087414?utm_source=gb-gplus-sharePatent US6087414 - Process for direct substitution of high performance polymers with unsaturated ester groups
