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Dual cure coating composition and process for using the same

  • US 20030083397A1
  • Filed: 08/28/2001
  • Published: 05/01/2003
  • Est. Priority Date: 08/28/2001
  • Status: Abandoned Application
First Claim
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1. A coating composition curable upon exposure to both UV radiation and thermal energy, the composition comprising (a1) a radiation curable component which polymerizes upon exposure to UV radiation, comprising (a11) at least two functional groups comprising at least one bond activatable upon exposure to UV radiation, and (a12) one or more isocyanate-reactive functional groups, (a2) a thermally curable binder component which polymerizes upon exposure to heat, consisting of one or more oligomers or polymers having (a21) at least two isocyanate-reactive functional groups, and (a22) substantially no functional groups having bonds activatable upon exposure to UV radiation, and (a3) a thermally curable crosslinking component comprising at least 2.0 isocyanate groups per molecule, wherein the ratio of NCO groups to the sum of isocyanate-reactive functional groups (a12) and (a21) is less than 1.30.

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