| 摘要 |
<p>A radiation-curable composition in a liquid or solid form comprises at least one solid, non-crystalline radiation-transmissible material, dispersed in at least one cationic-curable or free-radical curable composition or mixture thereof. The solid, non-crystalline radiation-transmissible materials compri se glasses and other suitable materials that transmit (i.e, are transparent to) at least about 40% of radiation having a wavelength from about 180 to about 600 nanometers. The cationic-curable compositions comprise at least one cycloaliphatic epoxide, at least one polyol, and at least one cation- generating photoinitiator. The free-radical curable compositions comprise at least one ethylenically unsaturated compound and at least one free-radical- generating photoinitiator unless electron beam curing is used, in which case the amount of photoinitiator can be reduced or even eliminated. The solid forms of the radiation-curable compositions of the invention are useful as powder coatings for coating decorative and functional objects and that would be cured by a thermal heating flow process followed by radiation exposure. T he cured compositions of the invention are useful as coatings and inks for meta l, paper, plastics, glass, ceramics, and wood, as adhesives, as sealants, and a s composite materials and other articles. The cured compositions of this invention also are useful in biomedical and dental applications, including prosthetic devices such as dentures; coatings, fillings, and caps for teeth; and the like.</p> |
