Adhesive for castable urethanes
AssigneeLord Corporation
InventorBrian P. Carney
Life of this patent
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Abstract
Provided are adhesives containing a phenoxy resin grafted with methyl methacrylate (MMA) and/or methacrylic acid (MAA), and including a uretdione or a silane. The adhesive compositions are completely or substantially absent free isocyanate. The grafted phenoxy resin forms crosslinking which allows the adhesive to chemisorb to a metal surface, diffuse and entangle in a urethane elastomer and/or provide crossbridging and/or crosslinking across an interface of the adhesive and a cast urethane. Methods of adhering a castable urethane to a substrate, using the provided adhesives, are also provided.
Claims25
An adhesive comprising a phenoxy resin grafted with methyl methacrylate (MMA) and/or methacrylic acid (MAA), and further comprising a uretdione or a silane.
An adhesive comprising MMA/MAA grafted phenoxy resin, uretdione of MDI, and optionally trimethylolpropane, silane, and metal acetylacetonate in proportions of about 10:10:4:0:0, 10:10:4:1.4:0, or 10:10:0:0:1.
An adhesive comprising MMA/MAA grafted phenoxy resin, silane and optionally HDI in proportions of about 10% to about 30% MMA/MAA grafted phenoxy resin, about 0.5% to about 2.5% silane, and about 0% to about 15% HDI.
Dependencies are inferred from the claim text.