Dual cure coating composition and processes for using the same
First Claim
1. A coating composition curable upon exposure to both ultraviolet (UV) radiation and thermal energy, the composition comprising(a1) a radiation curable component which polymerizes upon exposure to UV radiation, comprising at least one polymer or oligomer comprising:
- (a11) at least two functional groups comprising at least one bond activatable upon exposure to UV radiation, (a2) a thermally curable binder component which polymerizes upon exposure to heat, comprising;
(a21) at least two functional groups reactive with functional groups (a31), and (a22) substantially no functional groups having bonds activable upon exposure to ultraviolet radiation. (a3) a thermally curable crosslinking component comprising (a31) two or more functional groups reactive with functional groups (a21), and (a32) substantially no functional groups having bonds activatable upon exposure to ultraviolet radiation (a4) optionally, one or more reactive diluents, wherein the nonvolatile weight ratio of the sum of radiation curable component (a1) and oplional reactive diluent (a4) to the sum of thermally curable binder component (a2) and thermally curable crosslinking component (a3) is the ultraviolet/thermal ratio (UV/TH) and is a value between 0.20 to 0.60.
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Accused Products
Abstract
The coating composition comprises a radiation curable component (a1), a thermally curable binder component (a2), a thermally curable crosslinking component (a3), and optionally, one or more reactive diluents (a4). Radiation curable component (a1) is polymerizable upon exposure to electromagnetic radiation and comprises at least two functional groups (a11) comprising at least one bond activatable with electromagnetic radiation. Thermally curable binder component (a2) is polymerizable upon exposure to heat and has at least two functional groups (a21) which are reactive with functional groups (a31). Third component (a3) comprises at least 2.0 functional groups (a31) which are reactive with functional groups (a21). The value of UV/TH, the nonvolatile weight ratio of the sum of radiation curable component (a1) and optional reactive diluent (a4) to the sum of thermally curable binder component (a2) and thermally curable crosslinking component (a3) is from 0.20 to 0.60. Also disclosed are coated surfaces having both optimum porosity sealing and adhesion.
88 Citations
21 Claims
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1. A coating composition curable upon exposure to both ultraviolet (UV) radiation and thermal energy, the composition comprising
(a1) a radiation curable component which polymerizes upon exposure to UV radiation, comprising at least one polymer or oligomer comprising: -
(a11) at least two functional groups comprising at least one bond activatable upon exposure to UV radiation, (a2) a thermally curable binder component which polymerizes upon exposure to heat, comprising;
(a21) at least two functional groups reactive with functional groups (a31), and (a22) substantially no functional groups having bonds activable upon exposure to ultraviolet radiation. (a3) a thermally curable crosslinking component comprising (a31) two or more functional groups reactive with functional groups (a21), and (a32) substantially no functional groups having bonds activatable upon exposure to ultraviolet radiation (a4) optionally, one or more reactive diluents, wherein the nonvolatile weight ratio of the sum of radiation curable component (a1) and oplional reactive diluent (a4) to the sum of thermally curable binder component (a2) and thermally curable crosslinking component (a3) is the ultraviolet/thermal ratio (UV/TH) and is a value between 0.20 to 0.60. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification