New open-time binder for Australasia

摘要

In Australasia, the open time of current water borne enamels is limited by the binder system, which in gloss systems is about three minutes. Incremental gains in open time may be made from changing the rheological profile and/or inclusion of specific additives, but the open time will still be significantly shorter than solvent borne systems. In addition, these additives have the potential to compromise the chemical and mechanical properties of the coating and significantly reduce the coverage.Over the past 15 years, the trim enamel market has undergone a dramatic shift from solvent borne alkyds to waterborne acrylic systems. A number of reasons have been given for this including the perceived environmental friendliness to hazard mitigation. This transformation has led to a number of advantages such as water wash up and fast curing times.