Graft copolymers, process for preparing the same, aqueous...

Details Graft copolymers, process for preparing the same, aqueous... Graft copolymers, process for preparing the same, aqueous...

C - Chemistry, Metallurgy

08

F

C08F 283/10 (2006.01) C09D 151/08 (2006.01)

Patent

CA 2132106

The invention relates to graft copolymers a) which are obtainable from A) epoxy resins having an epoxide equivalent weight of at least 500, preferably at least 700, and/or phenoxy resins, B) carboxylic anhydrides containing at least one polymerizable, ethylenically unsaturated double bond per molecule, and from C) further ethylenically unsaturated monomers, at least some of which may, if desired, contain a carboxyl group, where the ratio between the weight of A) and the total weight of monomer components B) and C) is in the range from 90:10 to 10:90. The invention also relates to coating compositions based on the graft copolymers a), and to their use for coating packaging containers.

L'invention porte sur des copolymères de greffe pouvant être obtenus à partir : A) de résines époxy possédant une masse équivalente d'époxy d'au moins 500, de préférence au moins 700, et (ou) de résines phénoxy; B) d'anhydrides carboxyliques renfermant au moins une double liaison de type éthylénique, polymérisable, par molécule; C) d'autres monomères avec insaturations éthyléniques, dont au moins certains, si on le souhaite, renferment un groupe carboxyle - le rapport de la masse de A) sur la masse totale de B) et de C) se situe dans une plage de 90/10 à 10/90. L'invention porte également sur des compositions de revêtement à base de ces copolymères de greffe et sur leur emploi pour le revêtement de contenants d'emballage.

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