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AssigneeChugoku Marine Paints, Ltd.
InventorsShingo Wakisaka, Tomohisa Sumida, Naoya Nakamura
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The present invention relates to an anticorrosive coating composition comprising an epoxy resin (a), a curing agent (b), an amide wax (c), and a liquid acrylic polymer (d) including a structural unit derived from an acrylate having an alkyl group of 4 to 18 carbon atoms. The anticorrosive coating composition of the present invention can form an anticorrosive coating film that is excellent adhesion to a metal substrate, anticorrosive properties and so on.
An anticorrosive coating composition, comprising an epoxy resin (a), a curing agent (h), an amide wax (c), and a liquid acrylic polymer (d), wherein said liquid acrylic polymer (d) comprises a structural unit derived from an acrylate having an alkyl group of 4 to 18 carbon atoms and has a glass transition temperature of −36° C. or less.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Coating compositions based on epoxy resins
With acrylic or methacrylic acids: c4-acrylate, e.g. butyl acrylate, isobutyl acrylate or tert-butyl acrylate
With acrylic or methacrylic acids: c8-acrylate, e.g. isooctyl acrylate or 2-ethylhexyl acrylate
Amines: amino amides>
About 7 years 4 months of term left · ends 4 Mar 2034 (estimated)
The present invention relates to an anticorrosive coating composition, an anticorrosive coating film, and a method for preventing corrosion of a substrate. More particularly, the invention relates to an anticorrosive coating composition capable of forming an anticorrosive coating film excellent in adhesion to metal substrates, anticorrosive properties, and the like, an anticorrosive coating film formed from the composition, and a method for preventing corrosion of metal substrates using the composition.
Usually, for prevention of corrosion, large-sized steel structures such as ships, land structures, and bridges are subjected to anticorrosive coating using an anticorrosive coating composition. In the anticorrosive coating, an anticorrosive coating composition is applied on a surface of a steel plate or the like to form an anticorrosive coating film having a thickness of several hundred to several thousand micrometers. This allows the surface of the steel plate or the like to be covered with the anticorrosive coating film to prevent the steel plate or the like from contacting with oxygen, salt, vapor, and the like, thereby preventing the corrosion of the steel plate or the like.
In addition, when it is necessary to forma thick film having a thickness of several hundred to several thousand micrometers, an anticorrosive coating composition including an amide wax-based thixotropic agent as an anti-sagging and anti-settling agent (a thixotropic agent) is used. Such an anticorrosive coating composition is excellent in adhesion to substrate surfaces of steel structures and the like and anticorrosive properties under usual coating conditions.
FIG. 1 is a schematic view for explaining an adhesion test in Examples.
<<Anticorrosive Coating Composition>>
An anticorrosive coating composition of the present invention (hereinafter also referred to simply as “composition of the present invention”) comprises an epoxy resin (a), a curing agent (b), amide wax (c), and a liquid acrylic polymer (d) including a structural unit derived from an acrylate having an alkyl group of 4 to 18 carbon atoms.
Since the composition of the present invention comprises these (a) to (d), it is an anticorrosive coating composition that is excellent in adhesion to a substrate and anticorrosive properties and whose spray dust hardly reduces the adhesion of a film formed thereon to an object to be coated even when the spray dust has attached to the object to be coated.