Coating composition for food containers

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 167/00 (2006.01) C08G 18/62 (2006.01) C09D 133/06 (2006.01) C09D 175/06 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2278351

The invention relates to a coating composition for food containers, which comprises: a) 20-40 % by weight of a binder polymer from the group "water- soluble or water-dispersible polyester resin; water-soluble or water- dispersible acrylic polymer"; b) 5-20 % by weight of a cross-linking urethane resin which is virtually free from free NCO groups; c) 20-70 % by weight of water; d) 0-18 % by weight of an organic solvent; and e) 0-5 % by weight of customary auxiliaries. Here, the binder polymer has an OH number of at least 10 mg of KOH/g and the urethane resin has a content of NCO groups (blocked) of at least 5 %.

L'invention concerne une composition de revêtement pour des récipients alimentaires. Cette composition comprend: a) 20-40 % en poids d'un polymère de liaison dans le groupe "résine de polyester soluble à l'eau ou dispersible dans l'eau; polymère acrylique soluble à l'eau ou dispersible dans l'eau"; b) 5-20 % en poids d'une résine d'uréthane réticulable qui est virtuellement dépourvue de groupes NCO libres; c) 20-70 % en poids d'eau; d) 0-18 % en poids d'un solvant organique et e) 0-5 % en poids d'auxiliaires. Le polymère de liaison comporte un nombre d'OH d'au moins 10 mg de KOH/g et la résine d'uréthane présente une teneur de NCO gropupes (bloqués) d'au moins 5 %.

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