Coating composition comprising (a1) radiation curable component that polymerizes upon exposure to actinic radiation comprising at least two functional groups comprising at least one bond that is activatable upon exposure to actinic radiation, optionally, at least one isocyanate-reactive functional g
Coating composition comprising (a1) radiation curable component that polymerizes upon exposure to actinic radiation comprising at least two functional groups comprising at least one bond that is activatable upon exposure to actinic radiation, optionally, at least one isocyanate-reactive functional group, and optionally, at least one hydroxyl-reactive functional group; (a2) thermally curable binder component that polymerizes upon exposure to heat comprising at least two functional groups that are reactive with functional groups of component (a3), wherein at least 5% by weight based on a nonvolatile weight of component (a2) is component (X) that is a polymer with at least two functional groups (a21), a Tg of less than 0° C., and an equivalent weight of greater than 225; (a3) thermally curable crosslinking component comprising at least two functional groups that are reactive with functional groups of (a2); and (a4) optionally, at least one reactive diluent.
대표청구항▼
1. A coating composition comprising(a1) a radiation curable component that polymerizes upon exposure to actinic radiation comprising (a11) at least two functional groups comprising at least one bond that is activatable upon exposure to actinic radiation, (a12) optionally, at least one isocyanate-rea
1. A coating composition comprising(a1) a radiation curable component that polymerizes upon exposure to actinic radiation comprising (a11) at least two functional groups comprising at least one bond that is activatable upon exposure to actinic radiation, (a12) optionally, at least one isocyanate-reactive functional group, and (a13) optionally, at least one hydroxyl-reactive functional group; (a2) a thermally curable binder component that polymerizes upon exposure to heat comprising at least two functional groups (a21) that are reactive with functional groups of component (a3), wherein at least 5% up to 100% by weight based on a nonvolatile weight of component (a2) is a component (X) that is a polymer with at least two functional groups (a21), a glass transition temperature of less than 0° C., and an equivalent weight of greater than 225 grams per equivalent; (a3) a thermally curable crosslinking component comprising at least two functional groups that are reactive with the functional groups (a21); and (a4) optionally, at least one reactive diluent, wherein the coating composition is curable upon exposure to both actinic radiation and thermal energy.2. The coating composition of claim 1, wherein component (X) is at least one of a polyether diol, polyether polyol, a polyester diol, and a polyester polyol.3. The coating composition of claim 2, wherein the polyether diol is at least one of polyethylene oxide, polypropylene oxide, and polytetrahydrofuran.4. The coating composition of claim 2, wherein the polyester diol is a polylactone.5. The coating composition of claim 2, wherein the polyester polyol is a ε-caprolactone extension of pentaerythritol.6. The coating composition of claim 1, wherein component (X) has a glass transition temperature of the homopolymer of less than ?20° C.7. The coating composition of claim 1, wherein component (X) has a glass transition temperature of the homopolymer of less than ?50° C.8. The coating composition of claim 1, wherein component (X) has an equivalent weight of greater than 265 grams per equivalent.9. The coating composition of claim 1, wherein component (X) is polytetrahydrofuran.10. The coating composition of claim 1, wherein the actinic radiation is UV radiation.11. The coating composition of claim 1, wherein the thermally curable binder component (a2) comprises at least two isocyanate reactive functional groups.12. The coating composition of claim 1, wherein the at least two isocyanate reactive functional groups (a21) are hydroxyl groups.13. The coating composition of claim 1, wherein the thermally curable crosslinking component (a3) comprises at least two isocyanate groups.14. The coating composition of claim 1, wherein the at least one functional group (a12) is a hydroxyl group.15. The coating composition of claim 1, wherein the at least two functional groups of component (a3) are isocyanate groups, and a ratio of isocyanate groups to a sum of functional groups (a12) and (a21) is less than 1.3.16. The coating composition of claim 15, wherein the ratio is less than 1.0.17. The coating composition of claim 15, wherein the ratio is from 0.5 to 1.25.18. The coating composition of claim 15, wherein the ratio is from 0.75 to 1.0.19. The coating composition of claim 1, wherein the thermally curable binder component (a2) comprises less than 5% by weight of aromatic ring moieties based on the nonvolatile weight of the thermally curable binder component (a2).20. The coating composition of claim 1, wherein the hydroxyl-reactive functional group (a13) is at least one of an isocyanate, an aminoplast, an epoxy, a silane, a cyclic anhydride, and a cyclic lactone.21. The coating composition of claim 1, wherein the hydroxyl-reactive functional group (a13) is an isocyanate.22. The coating composition of claim 1, wherein the isocyanate-reactive functional group (a12) is at least one of a thiol group, a primary amino group, a secondary amino group, an imino group, and a hydroxyl group.23. A method comprising applying the coating composition of claim 1 to a substrate to form a film.24. The method of claim 23 further comprising subjecting the film to actinic radiation.25. The method of claim 24, wherein the actinic radiation is UV radiation.26. The method of claim 24 further comprising subjecting the film to heat to provide a coated substrate.27. The method of claim 26 further comprising applying at least one additional coating.28. The method of claim 23 further comprising subjecting the film to heat and then to actinic radiation to provide a coated substrate.29. The method of claim 23, wherein the substrate comprises a plastic.30. The method of claim 29, wherein the substrate is a fiber-reinforced plastic substrate.31. The method of claim 29, wherein the substrate is sheet molded compounds or bulk molded compounds.
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