Title: One-step technology for synthesizing cross-linked carboxymethyl hydroxypropyl cellulose complex ether
Application Number: 89102682 Application Date: 1989.04.26
Publication Number: 1046740 Publication Date: 1990.11.07
Approval Pub. Date: Granted Pub. Date: 1993.02.03
International Classifi-cation: C08B11/08,C08B11/12
Applicant(s) Name: Guangzhou Inst. of Chemistry, Chinese Academy of S Address:
Inventor(s) Name:
Attorney & Agent: LI JILAN
Abstract:
     This invention belongs to a synthesizing field of water-soluble high molecular cellulose ether and discloses a synthesizing technology for completing etherification, cross-linking and purification of cellulose complex ether in one step. Cellulose reacts with etherifying agent and cross-linking agent in an alkaline medium whose diluent is hydrophilic organic solvent. The consumptions of the reactants are as follows: cellulose (100%), cross-linking agent (0.1-3.5), hydroxypropyl etherifying agent (30-250%), and carboxymethyl etherifying agent (10-94%). The technology features uniform reaction, easily recovered organic diluent, less consumption of cross-linking agent, and product having such performances as high viscosity, and good thermal stability and salt and acid resistances. The products with different DS and MS can be produced.
Time: 12
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