Low-emission curable printing-ink or coatings binders

Details Low-emission curable printing-ink or coatings binders Low-emission curable printing-ink or coatings binders

C - Chemistry, Metallurgy

09

D

C09D 167/00 (2006.01) C08G 63/20 (2006.01) C09D 11/10 (2006.01) C09D 177/12 (2006.01)

Patent

CA 2280849

Low-solvent or solvent-free printing-ink or coatings binders comprise (a): from 30 to 98 % by weight of polyesters, as component A, obtainable by reacting (a1) hydroxyl- and/or amino-terminated oligomers, as component A1, (a2) at least one polyanhydride compound having at least two carboxylic anhydride groups, as component A2, with or without (a3) at least one monoanhydride of a polycarboxylic acid, as component A3, (b) from 70 to 2 % by weight of cross-linker for cross-linking the polyesters of component A, as component B, and (c) from 0 to 30 % by weight, based on the sum of the amounts of components A and B, of at least one solvent.

L'invention concerne des liants de revêtement ou une encre d'impression à faible teneur en solvent ou exempts de solvents. Ces produits comprennent (a) entre 30 et 98 % en poids de polyesters, comme composant A, pouvant être obtenus en faisant réagir (a1) des oligomères à terminaison hydroxyle et/ou aminée, comme composant A1, (a2) au moins un composé polyanhydride présentant au moins deux groupes d'anhydride carboxylique, comme composant A2, avec ou sans (a3) au moins un monoanhydride d'un acide polycarboxylique, comme composant A3, (b) entre 70 et 2 % en poids d'un agent de réticulation pour réticuler les polyesters du composant A, comme composant B, et (c) entre 0 et 30 % en poids, en fonction de la somme des quantités des composants A et B, d'au moins un solvent.

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