A stabilized solid controlled release dosage form having a coating derived from an aqueous dispersion of ethylcellulose is obtained by overcoating a substrate including a therapeutically active agent with an aqueous dispersion of ethylcellulose and then curing the coated substrate at a temperature and...http://www.google.com.au/patents/US5273760?utm_source=gb-gplus-sharePatent US5273760 - Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer
