Liquid moisture curable polyurethane with improved adhesion to aluminum
AssigneeHenkel AG & Co. KGaA
InventorsYingjie Li, Shuhui Qin
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Abstract
Disclosed is a one component, liquid, moisture curable polyurethane adhesive composition comprising the reaction products of a mixture including at least one polyol with an excess of one or more polyisocyanates and an acid component. The adhesive composition has enhanced bond strength to metals such as aluminum compared to currently available adhesives. The composition finds special use in panel lamination applications.
Claims20
A method of making a bonded reinforced composite structure, comprising:
- providing an aluminum frame having a first bonding surface;
- providing a first panel having a bonding surface;
- providing a one component, liquid, moisture curable polyurethane adhesive composition, wherein the adhesive composition includes the reaction products of a mixture comprising at least one polyol, an excess of at least one organic polyisocyanate, and an acid component in acid form and/or salt form, wherein the acid component is selected from the group consisting of nitric acid, sulfuric acid, methanesulfonic acid, phosphonic acid, phosphoric acid, propionic acid, and any combination thereof;
- applying the adhesive composition to the aluminum frame first bonding surface, the first panel bonding surface, or both;
- disposing the first panel bonding surface in contact with the aluminum frame first bonding surface to form a composite structure;
- and
- curing the adhesive to bond the first panel to the aluminum frame.
A one component, liquid, moisture curable polyurethane adhesive composition comprising the reaction products of a mixture including at least one polyol, an excess of at least one organic polyisocyanate, and an acid component in acid form and/or salt form, wherein the acid component is selected from the group consisting of nitric acid, sulfuric acid, methanesulfonic acid, phosphonic acid, phosphoric acid, propionic acid, and any combination thereof.
Dependencies are inferred from the claim text.