首页>
外国专利>
Use of oxime-protected isocyanate groups in the uv curing of resins at low temperature, and uv-curable resins that contain such oxime-protected isocyanate groups, and the use thereof in uv-curable coating compositions
Use of oxime-protected isocyanate groups in the uv curing of resins at low temperature, and uv-curable resins that contain such oxime-protected isocyanate groups, and the use thereof in uv-curable coating compositions
The invention relates to the use of an oxime-protected isocyanate group with the formula (I): -R3-NH-CO-O-N=CR1R2, where at least one of the groups R1, R2 or R3 includes or carries at least one UV-absorbing group which makes the group (NH-CO-O-N=C) susceptible to cleavage under the influence of UV radiation; in or as side chains of branched polymers or in cross-linkers, for giving UV curability to these polymers or to polymeric compositions which contain such polymers and/or cross-linkers, as well as such compounds and compositions. The invention also relates to a method for curing such compounds under UV irradiation, in particular at temperatures of less than 130 DEG C. The invention is especially suitable for use in powder coatings for temperature-sensitive substrates.
展开▼
