Chain extension process

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/35 (2006.01) C08G 63/91 (2006.01) C08G 69/04 (2006.01) C08G 69/16 (2006.01) C08G 69/20 (2006.01) C08G 69/28 (2006.01) C08G 69/48 (2006.01)

Patent

CA 2402430

The invention relates to a process for preparing a high-molecular polymer by contacting in a melt a difunctional lowermolecular polymer whose functional end groups are -OH or -NH2 groups with carbonylbislactamate, characterized in that the melt also contains an acid or a base as a catalyst. If the difunctional polymer contains a -COOH group, it is preferred for the melt also to contain a bisoxazine or a bisoxazoline.

L'invention concerne un procédé de préparation d'un polymère de masse moléculaire élevée, qui consiste à mettre dans un bain de fusion un polymère bifonctionnel à masse moléculaire élevée dont les groupes fonctionnels d'extrémité sont des groupes -OH ou -NH¿2? avec du carbonylbislactamate. Le bain de fusion contient également un acide ou une base faisant office de catalyseur. Si le polymère bifonctionnel contient un groupe -COOH, il est préférable que le bain de fusion contienne une bioxazine ou une bisoxazoline.

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