US 9,751,283 B2Granted

Resin-coated metal sheet for containers

AssigneeJfe Steel Corporation

InventorsYoichiro Yamanaka, Koichi Sasaki, Yusuke Nakagawa, Junichi Kitagawa, Yoichi Tobiyama

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Abstract

The resin-coated metal sheet for containers includes a resin coating layer (A) having a multilayered structure mainly composed of a polyester resin on at least one surface thereof. The resin coating layer (A) includes a resin layer (a1). The resin layer (a1) adheres to the metal sheet, contains (i) a polyester resin, (ii) a phenolic resin, (iii) a metal alkoxide compound and/or a metal chelate compound, (iv) an epoxy resin, and (v) at least one selected from the group consisting of polyamine resins, polyamidoamine resins, and polyamide resins, and is mainly composed of the polyester resin. Preferably, a polyester film (a2) is disposed on the resin layer (a1).

Claims8

Dependent claims

A resin-coated metal sheet for containers, comprising a metal sheet having on at least one surface thereof a resin layer (a1) in contact with and adhering to the metal sheet, wherein resin layer (a1) contains the following components (i) to (v):

(i) a polyester resin constituting at least 50 mass % of layer (a1), wherein the polyester resin has a number-average molecular weight in the range of 3000 to 100000 and is at least one of the following (i-1) to (i-3):
(i-1) a polyester resin having a glass transition temperature of 0° C. or more and less than 35° C.,
(i-2) a polyester resin having a glass transition temperature of 35° C. or more and less than 65° C., and
(i-3) a polyester resin having a glass transition temperature of 65° C. or more and less than 100° C.,
(ii) a phenolic resin,
(iii) a metal alkoxide compound and/or a chelated metal compound,
(iv) an epoxy resin, and
(v) at least one compound selected from the group consisting of polyamines, polyamidoamine resins, and polyamide resins.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/346,194Filed 27 Sep 2012
Priority: JP 2011-21245928 Sep 2011
Published: US 2014/0227529 A114 Aug 2014
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification83 codes

B32B 15/09
Of synthetic resin: comprising polyesters
B32B 15/08
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 15/092
Of synthetic resin: comprising epoxy resins
B32B 15/098
Of synthetic resin: comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines