???? ??????? ???? ??? ???????? ????? ?????? ????? ???? ?? ???????? ????? ????????? ?????????? ??????????? ???????? ?? ????? ??????? ???????. ????? ??? ?????? ??? ????? ?????. ??????? ???????? ??? ?????? ???? ??? ???? ??? ?????? ?? ??? ????? ?????? ?? ?????? ?? ?? ?????? ?? ???????? ???? (??? ?????

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Epoxy resins can be thermally cured with anhydrides to generate polymers with important house retention at elevated temperatures for extended amounts of time. Reaction and subsequent crosslinking happen only soon after opening of the anhydride ring, e.g. by secondary hydroxyl teams in the epoxy resi