Process for the manufacture of polyurethane-coated products
AssigneeNissan Motor Co., Ltd.
InventorsToshihiko Uchiyama, Eizo Yoshida, Toshiki Okuyama
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Abstract
A process for manufacturing polyurethane-coated products is disclosed. These polyurethane-coated products are manufactured by press-forming a metal material coated with a lubricant inclusive of a compound having an oxygen-hydrogen bond into a core member of a desired shape and covering necessary portions of the core member a with polyurethane foam or coating formed by reacting the compound with an isocyanate of the polyurethane forming material without degreasing steps, i.e. pretreatments for washing off the lubricant.
Claims20
A process for manufacturing a press-formed metallic article having a layer of a polyurethane resin, comprising the steps of:
- providing a core-member comprising a metallic sheet, said sheet having a thin coating of a rust-preventing oil or being free from such a coating;
- applying to said core-member a thin layer of a lubricant composition comprising a compound having an oxygen-hydrogen bond;
- press-forming said lubricated core-member into a desired shape;
- without degreasing the surface of said press-formed core-member to remove said lubricant composition, applying to the surface of said core-member a polyurethane-forming composition consisting essentially of a polyol and an isocyanate;
- reacting said polyol and said isocyanate to produce a layer of polyurethane resin on the surface of said press-formed core-member;
- and
- reacting said compound having an oxygen-hydrogen bond with said isocyanate to produce a urethane bond, whereby adhesion between the polyurethane resin layer and the core-member is enhanced.
A process for manufacturing a press-formed metallic article having a layer of a polyurethane resin, comprising the steps of:
- applying to a core member comprising a metallic sheet a thin layer of a lubricant composition comprising 20 parts of 80/20 acrylic acid/methacrylic acid polymer, 3 parts of styrene-maleic anhydride copolymer, 0.5 part of calcium stearate, 0.5 part of zinc stearate and the balance up to 100 parts of methylene chloride;
- press-forming said lubricated core member into a desired shape;
- without degreasing the surface of said press-formed core member to remove said lubricant composition, applying to the surface of said core member a polyurethane-forming composition consisting essentially of a polyol and an isocyanate;
- and
- reacting said polyol and said isocyanate to produce a layer of polyurethane resin on the surface of said press-formed core member and at the same time reacting said lubricant composition with said isocyanate to produce a urethane bond, whereby adhesion between the polyurethane resin layer and the core-member is enhanced.
Dependencies are inferred from the claim text.