Resin-metal laminates
AssigneeNippon Steel Corporation
InventorsHiroshi Ohishi, Masahiro Kumagai, Nobuo Kadowaki, Keiko Kawakami
Life of this patent
Estimating the term…
Abstract
A resin composition for coating a metal sheet comprising a polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, an elastomer resin (B) and a vinyl polymer (C) containing at least 1 wt % of a unit with a polar group, and having a structure wherein the elastomer resin (B) is finely dispersed in the polyester resin (A) and at least a portion of the elastomer resin (B) is capsulated by the vinyl polymer (C). Also, metal-sheet-coating resin films using the resin composition, resin-coated metal sheets coated with the resin film, and resin-coated metal containers made by molding the resin-coated metal sheets are disclosed.
Claims30
A resin film-laminated metal sheet comprising a resin layer laminated on a metal sheet, said resin laminated layer comprising a polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, an elastomer resin (B) and a vinyl polymer (C) containing at least 1 wt % of a unit with a polar group, wherein said three components (A), (B) and (C) are melt-mixed to have a structure wherein the elastomer resin (B) is finely dispersed in the polyester resin (A) and at least a portion of the elastomer resin (B) is capsulated by the vinyl polymer (C),
- wherein the elastomer resin (B) is softer than the vinyl polymer (C).
A resin film-laminated metal sheet comprising a resin layer laminated on a metal sheet, said resin laminated layer comprising a polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, an elastomer resin (B) and a vinyl polymer (C) containing at least 1 wt % of a unit with ethylene and a polar group, and having a structure wherein the elastomer resin (B) is finely dispersed in the polyester resin (A) and at least a portion of the elastomer resin (B) is capsulated by the vinyl polymer (C),
- wherein the elastomer resin (B) is softer than the vinyl polymer (C).
A resin film-laminated metal sheet comprising a resin layer laminated on a metal sheet, said resin laminated layer comprising a polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, and a core/shell type elastomer resin comprising a core of an elastomer resin (B) and a shell of a vinyl polymer (C) comprising an acrylate-based polymer and an epoxy group or an aromatic polyester bond is introduced into the acrylate-based polymer at up to 15 wt % with respect to acrylate units, and having a structure wherein the core/shell type elastomer resin is finely dispersed in the polyester resin (A),
- wherein the elastomer resin (B) is softer than the vinyl polymer (C).
A resin film-laminated metal sheet comprising a resin layer laminated on a metal sheet, said resin laminated layer comprising a crystalline polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, an elastomer resin (B) and a vinyl polymer (C) containing at least 1 wt % of a unit with a polar group, and having a structure wherein the elastomer resin (B) is finely dispersed in the polyester resin (A) and at least a portion of the elastomer resin (B) is capsulated by the vinyl polymer (C),
- wherein the elastomer resin (B) is softer than the vinyl polymer (C).
Dependencies are inferred from the claim text.