| 摘要 |
<p>Preparing dual-cure hardeners involves reacting a reaction mixture containing at least one diisocyanate or polyisocyanate A with the product B of the reaction of B1 acrylic acid, methacrylic acid and/or dimeric acrylic acid with B2 glycidyl methacrylate and/or glycidyl acrylate, where B contains less than 0.2 wt.% of epoxide groups (calculated as M=42). Independent claims are also included for: (1) a one-component or multi-component coating agent comprising polyisocyanate(s) obtained according to the inventive process; compounds which have at least one isocyanate-reactive group and optionally comprise functional groups which under the influence of actinic radiation react with ethylenically unsaturated compounds, with polymerization; optionally further polyisocyanates, which optionally comprise functional groups which under the influence of actinic radiation react with ethylenically unsaturated compounds, with polymerization; optionally compounds bearing functional groups which under the influence of actinic radiation react with ethylenically unsaturated compounds, with polymerization, which have neither isocyanate groups nor isocyanate-reactive groups; optionally catalysts; optionally auxiliary agents and additives; and optionally products of reactions between the above components; (2) a method of coating a substrate comprising applying the coating agents to at least a portion of the substrate; and (3) substrates coated with the above coating agents.</p> |
