Polymerisable polyamide derivatives

A shaped article comprising a polymer-modified polyamide shaped article produced by a method comprising:

• a) providing a polyamide shaped article having amino and carboxyl groups;
• b) optionally, reacting carboxyl groups of said polyamide shaped article with a diamino compound or reacting amino groups of said polyamide shaped article with a dicarboxylic acid or dicarboxylic acid anhydride;
• c) obtaining a polyamide shaped article modified with polymerizable double bonds by reacting the amino and/or carboxyl groups on the polyamide shaped article from step a) or step b) with at least one group reactive with amino groups or carboxyl groups on a compound which contains a polymerizable double bond in addition to the at least one group reactive with the amino groups or the carboxyl groups on the polyamide shaped article, provided that, if this compound contains a group reactive with the amino groups, it contains no oxirane ring unless the polyamide shaped article has been reacted with the diamino compound in b);
• d) polymerizing monomers onto at least one polymerizable double bond of the polyamide shaped article modified with polymerizable double bonds from c) to obtain the shaped article.