| 摘要 |
<p>PURPOSE: Provided is a radiation curable aqueous polyurethane dispersion that exhibits both good physical surface drying before radiation curing and good grain enhancement on wood. CONSTITUTION: The radiation curable aqueous polyurethane dispersion contains 0.05 to 20 wt%(based on the weight of the non-aqueous constituents of the aqueous polyurethane dispersion) of 2,2-dimethyl-3-hydroxypropionic acid-(2,2-dimethyl-3- hydroxypropyl ester)(calculated as MW 204.3). The 2,2-dimethyl-3-hydroxypropionic acid (2,2-dimethyl-3-hydroxypropyl ester) is chemically incorporated into the radiation curable polyurethane. The polyurethane is prepared from a hydroxyl group containing polymer having an OH number of 30 to 300 mg KOH/g and comprising a member selected from the group consisting of polyester acrylates, epoxy acrylates, polyether acrylates, urethane acrylates and unsaturated polyesters.</p> |
