Patent ID: 8138331
Filing Date: 2012-03-20
Classification: C08B

Abstract:
1. A process for producing glyoxal-treated polysaccharide derivatives comprising: a) mixing an untreated polysaccharide derivative that is selected from the group consisting of methyl cellulose, methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, methyl ethyl cellulose, methyl ethyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, methyl hydroxyethyl hydroxypropyl cellulose, ethyl hydroxyethyl hydroxypropyl cellulose, methyl carboxymethyl cellulose, ethyl carboxymethyl cellulose, propyl cellulose, isopropyl cellulose, and cyclohexyl cellulose in the form of particles with b) drying the resultant mixture, wherein the amount of extractable, unbound glyoxal is less than 0.1% by weight.