Electron-beam curable polyurethane compositions; and method

Details Electron-beam curable polyurethane compositions; and method Electron-beam curable polyurethane compositions; and method

C - Chemistry, Metallurgy

08

G

400/2012, 117/24

C08G 18/67 (2006.01) G11B 5/62 (2006.01) G11B 5/702 (2006.01)

Patent

CA 1332743

Abstract A method and agent for improving polyurethane binder compositions are provided. The method comprises introducing into the polyurethane backbone a diol residue including a double bond therein. Preferably the double bond is positioned in a moiety pendant from the polyurethane backbone. In preferred compounds, the double bond-containing residue is introduced in sufficient quantities to provide at least one double bond every 2,000-3,000 molecular weight units of polymer. Preferred agents include acrylate-, methacrylate-, acrylamide-, norbornenyl- and cyclohexenyl- groups. Preferred compositions, both cured and uncured, are provided. Also, use of such a composition in magnetic recording media is described.

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