Use of oxyimide-comprising copolymers or polymers as flame retardants, stabilisers, rheology modifiers for plastic materials, initiators for polymerisation- and grafting processes, crosslinking- or coupling agents and also plastic moulding compounds comprising such copolymers or polymers

A method for producing a copolymer or polymer comprising at least one of the following structural elements:

• the method comprising:
• reacting a copolymer or polymer comprising a maleic anhydride unit or an itaconic anhydride unit with an amine according to the general formula IV:
• H2N—O—R (IV),
• wherein, respectively independently of each other,
• R is an optionally substituted alkyl radical with 1 to 18 carbon atoms, an optionally substituted cycloalkyl radical with 6 to 22 carbon atoms, an optionally substituted aryl radical with 6 to 36 carbon atoms, or an optionally substituted acyl radical with 2 to 18 carbon atoms or hydrogen,
• * is a binding site in the copolymer or polymer,
• n is 0 or 1, and
• X is methyl.