A high solids acrylic polyurethane coatings by use of a polyester oligomer as plasticizer has been prepared, which can lead to a higher application solids and excellent film performance.
The amount of plasticizer, film thickness, curing temperature and curing time effect the release of the DS from the tablet coated with ethylcellulose aqueous dispersion.
The influence of the migration of plasticizer on the performances of coatings film is introduced. How to reduce the amount of the plasticizer is discussed.