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US 6,617,019 B2Granted
Composite protective coating for metal surfaces
AssigneeDow Global Technologies LLC
InventorsMark Carl Danner, Benjamin Robert Cohen
Life of this patent
Estimating the term…
Abstract
Prepare a composite protective coating for metal substrates such as steel used in fabricating metal pipe or conduit. The coating, when applied to a flat metal surface, retains its bond to the metal through cold forming processes such as those used in making ribbed steel pipe. The coating resembles a sandwich of a reinforcing material layer between two adhesive films.
Claims12
A composite protective coating for a metal surface comprising:
- a. an inner adhesive film for adhering the coating to the metal surface, the inner film comprising:
- 1) a first layer of a copolymer of ethylene and acrylic acid, and,
- 2) a second layer of a copolymer of ethylene and acrylic acid, the first layer suitable for adhering to the metal surface and the second layer adhering to the first layer;
- b. a reinforcing layer adjacent to the second layer of the inner adhesive film and bonded thereto;
- and,
- c. an outer adhesive film adjacent to the reinforcing layer, the outer layer comprising:
- 1) a first layer of a copolymer of ethylene and acrylic acid, and,
- 2) a second layer of a copolymer of ethylene and acrylic acid, the first layer adhering to the reinforcing layer and the second layer adhering to the first layer.
5 more elements
Dependencies are inferred from the claim text.