C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
260/212
C08B 11/20 (2006.01) A61K 9/28 (2006.01) C08B 31/06 (2006.01) C08B 37/00 (2006.01) C08B 37/02 (2006.01)
Patent
CA 2008240
ABSTRACT A method of removing undesirable material from aqueous solutions of water-soluble polysaccharide ethers, e.g. cellulose ethers, via contact with anion exchange resins. Anion exchange resins that are useful in the invention are derived from epoxy resin polymers, acrylic based copolymers or a copolymer of styrene- divinylbenzene. The method significantly reduces the amount of colored bodies in the solutions. 37,247-F
Christensen Stephen B.
Kling Susan
Schutz Gary J.
Smart & Biggar
The Dow Chemical Company
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