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US 7,618,711 B2Granted
Resin coated metal plate having excellent formability, weldability and corrosion resistance, and worked articles using the resin coated metal plate and method for manufacturing same
AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorsHironobu Nakanishi, Kazuhisa Fujisawa, Hiroo Shige, Masatoshi Iwai
Life of this patent
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Abstract
A resin coated metal plate having excellent formability comprises, on a metal plate, a resin coating layer containing a conductive filler and a corrosion inhibitor, a matrix resin constituting the resin coating layer is made mainly of a flexible epoxy resin and has a modulus of elasticity of not less than 3 GPa. When secondarily cured, the resin coated metal plate is imparted with excellent weldability and corrosion resistance.
Claims10
A resin coated metal plate comprising:
- a metal plate, and
- a resin coating layer formed on said metal plate, said resin coating layer comprising a resin coating composition that has undergone both primary and secondary curing;
- wherein the resin coating composition comprises 40-60 wt % of a conductive filler, 5-25 wt % of a corrosion inhibitor, a matrix resin, a primary crosslinking agent, and a secondary crosslinking agent;
- wherein the matrix resin consists of a flexible epoxy resin and a polyester resin provided in a mixing ratio of 60 to 90 wt %:40 to 10 wt %;
- wherein the primary and secondary crosslinking agents either have different crosslinking reaction commencement temperatures or have different crosslinking reaction rates with a substantially same crosslinking reaction commencement temperature;
- said secondary crosslinking agent exhibiting a relatively high crosslinking reaction commencement temperature or a relatively low crosslinking reaction rate;
- said primary crosslinking agent exhibiting a relatively low crosslinking reaction commencement temperature or a relatively high crosslinking reaction rate;
- wherein the resin coated metal plate is produced by:
- (a) applying the resin coating composition to the metal plate;
- (b) performing primary curing of the resin coating composition, allowing the primary crosslinking agent to react with the matrix resin;
- wherein the primarily cured resin coating composition has a modulus of elasticity of not more than 3 GPa;
- and
- (c) performing secondary curing of the resin coating composition, allowing the secondary crosslinking agent to react with the primarily cured resin coating composition.
10 more elements
A resin coated metal plate comprising:
- a metal plate, and
- a resin coating layer formed on said metal plate, said resin coating layer comprising a resin coating composition that has undergone primary curing;
- wherein the resin coating composition comprises 40-60 wt % of a conductive filler, 5-25 wt % of a corrosion inhibitor, a matrix resin, a primary crosslinking agent, and a secondary crosslinking agent;
- wherein the matrix resin consists of a flexible epoxy resin and a polyester resin provided in a mixing ratio of 60 to 90 wt %:40 to 10 wt %;
- wherein the primary and secondary crosslinking agents either have different crosslinking reaction commencement temperatures or have different crosslinking reaction rates with a substantially same crosslinking reaction commencement temperature;
- said secondary crosslinking agent exhibiting a relatively high crosslinking reaction commencement temperature or a relatively low crosslinking reaction rate;
- said primary crosslinking agent exhibiting a relatively low crosslinking reaction commencement temperature or a relatively high crosslinking reaction rate;
- wherein the resin coated metal plate is produced by:
- (a) applying the resin coating composition to the metal plate;
- and
- (b) performing primary curing of the resin coating composition, allowing the primary crosslinking agent to react with the matrix resin;
- wherein the primarily cured resin coating composition has a modulus of elasticity of not more than 3 GPa.
9 more elements
A method of fabricating a resin coated metal plate having good weld-ability and corrosion resistance comprising:
- (a) preparing a resin coating composition,
- wherein the resin coating composition comprises 40-60 wt % of a conductive filler, 5-25 wt % of a corrosion inhibitor, a matrix resin, a primary crosslinking agent, and a secondary crosslinking agent;
- wherein the matrix resin consists of a flexible epoxy resin and a polyester resin provided in a mixing ratio of 60 to 90 wt %:40 to 10 wt %;
- wherein the primary and secondary crosslinking agents either have different crosslinking reaction commencement temperatures or have different crosslinking reaction rates with a substantially same crosslinking reaction commencement temperature;
- said secondary crosslinking agent exhibiting a relatively high crosslinking reaction commencement temperature or a relatively low crosslinking reaction rate;
- said primary crosslinking agent exhibiting a relatively low crosslinking reaction commencement temperature or a relatively high crosslinking reaction rate;
- (b) applying the resin coating composition to the metal plate;
- (c) performing primary curing of the resin coating composition, allowing the primary crosslinking agent to react with the matrix resin;
- wherein the primarily cured resin coating composition has a modulus of elasticity of not more than 3 GPa;
- and
- (d) performing secondary curing of the resin coating composition, allowing the secondary crosslinking agent to react with the primarily cured resin coating composition.
8 more elements
Dependencies are inferred from the claim text.