Patent ID: 6635275
Filing Date: 2003-10-21
Classification: A61K

Abstract:
A film former, comprising:a) a starch ether selected from the group consisting of hydroxypropylated starch, hydroxyethylated starch and mixtures thereof; and b) a film setting system comprising: i) from 0.01% to 10%, by weight, of a polysaccharide selected from the group consisting of alginates, agar gum, guar gum, locust bean gum (carob), carrageenan, tara gum, gum arabic, ghani gum, Khaya grandifolia gum, tragacanth gum, karaya gum, pectin, arabian (araban), xanthan, gellan, starch, Konjac mannan, galactomannan, funoran, acetan, welan, rhamsan, furcelleran, succinoglycan, scieroglycan, schizophyllan, tamarind gum, curdlan, pullulan, dextran and mixtures thereof; ii) from 0.001% to 5%, by weight, of a cation selected from the group consisting of K+, Na+, Li+, NH4+, Ca++ or Mg++ and mixtures thereof; iii) less than 3%, by weight, of a sequestering agent selected from the group consisting of ethylenediaminetetraacetic acid, acetic acid, boric acid, citric acid, edetic acid, gluconic acid, lactic acid, phosphoric acid, tartaric acid or salts thereof, methaphosphates, dihydroxyethylglycine, lecithin, beta cyclodextrin, salts thereof and mixtures thereof; and iv) from 2% to 12%, by weight, water.