Process for coating a particle with a polymeric coating having unique dissolution characteristics

摘要

A process for coating a solid or composite particle with a protective alkyl cellulose ether polymeric coating which is insoluble in a liquid detergent product but soluble in the wash solution of the liquid detergent product is disclosed. In this process, an alkyl cellulose ether polymer is dispersed in water. The temperature of the water is at least about 60 DEG C. The alkyl cellulose ether polymer in water dispersion is then cooled to a temperature below at least about 40 DEG C and a sprayable alkyl cellulose ether polymer in water solution is formed which is then sprayed on the solid or composite particle while the temperature of the sprayable solution is simultaneously maintained below about 40 DEG C. A coating of the alkyl cellulose ether on the solid or composite particle is formed.