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Method for treating a substrate with a radiation and chemically curable coating composition

  • US 4,212,901 A
  • Filed: 07/10/1978
  • Issued: 07/15/1980
  • Est. Priority Date: 07/08/1977
  • Status: Expired due to Term
First Claim
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1. A method for treating a substrate with a radiation curable coating composition based on a polyester resin esterified with acrylic acid and/or methacrylic acid, a vinyl compound and a photoinitiator, the coating composition being dried under the influence of light having a wave length of 200 to 600 nm, characterized in that the polyester resin esterified with meth(acrylic) acid has a hydroxyl number in the range of 50 to 250 and an ethylenic unsaturation equivalent weight in the range of 200 to 10,000 grams, and in that the coating composition also contains a polyisocyanate in an amount of 0.7 to 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in the composition.

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