Process for multilayer coating
First Claim
1. A process for multilayer coating of substrates, comprising the steps:
- I) applying a layer of a water-based color-imparting and/or special effect-imparting base coat coating composition to a substrate,II) applying a layer of a clear coat coating composition curable by means of high energy radiation, andIII) curing the clear coat layer by exposing it to high energy radiation, wherein the clear coat coating composition comprises;
A) a hydroxyl-functional (meth)acryloyl functional polyurethane compound, a hydroxyl-functional (meth)acryloyl functional urethane compound, and a hydroxyl-functional (meth)acryloyl functional (meth)acrylic copolymer,A1) a polyisocyanate with free isocyanate groups,B) at least one photoinitiator, andC) triphenyl phosphine, wherein the clear coat coating composition comprises 3.0 to 40% by weight triphenyl phosphine.
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Abstract
This invention relates to a process for multilayer coating of substrates, comprising the steps: I) applying a layer of a water-based color-imparting and/or special effect-imparting base coat coating composition to a substrate, II) applying a layer of a clear coat coating composition curable by means of high energy radiation and optionally curable by at least one additional chemical curing reaction, and III) curing said clear coat layer by exposing it to high energy radiation, wherein the clear coat coating composition comprises: A) at least one compound capable of free-radical polymerization having at least one olefinically unsaturated group, B) at least one photoinitiator and C) at least one organic phosphine derivative.
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Citations
13 Claims
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1. A process for multilayer coating of substrates, comprising the steps:
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I) applying a layer of a water-based color-imparting and/or special effect-imparting base coat coating composition to a substrate, II) applying a layer of a clear coat coating composition curable by means of high energy radiation, and III) curing the clear coat layer by exposing it to high energy radiation, wherein the clear coat coating composition comprises; A) a hydroxyl-functional (meth)acryloyl functional polyurethane compound, a hydroxyl-functional (meth)acryloyl functional urethane compound, and a hydroxyl-functional (meth)acryloyl functional (meth)acrylic copolymer, A1) a polyisocyanate with free isocyanate groups, B) at least one photoinitiator, and C) triphenyl phosphine, wherein the clear coat coating composition comprises 3.0 to 40% by weight triphenyl phosphine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification