Process for preparing a branched polymer

C - Chemistry – Metallurgy – 08 – K

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C08K 5/35 (2006.01) C08G 18/80 (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 2402349

The invention relates to a process for preparing a branched polymer by contacting a monofunctional or difunctional polymer whose functional group is at least an -OH or an -NH2 group with a multifunctional compound RYn, where n > 2 and Y is an -OH group, an -NHm group where m=1,2 or a -COOH group and R is an alkyl, an aryl group or a cyclic group and in which the Y groups need not be the same and in which carbonyl bislactamate is also present.

L'invention concerne un procédé de préparation d'un polymère ramifié, qui consiste à mettre un polymère monofonctionnel ou difonctionnel dont le groupe fonctionnel est au moins un groupe -OH ou -NH¿2? au contact d'un composé multifonctionnel représentés par la formule RY¿n?, où n > 2, Y représente un groupe -OH, un groupe NH¿m? (m étant égal à 1,2) ou un groupe -COOH et R désigne un groupe alkyle, un groupe aryle ou un groupe cyclique, où les groupes Y n'ont pas à être identiques et où le bislactamate de carbonyle est également présent.

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