Patent ID: 8569214
Filing Date: 2013-10-29
Classification: C04B,C08B,C08L,C09K

Abstract:
1. A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition, wherein the additive composition has a biodegradability of greater than 20% in 68 days, comprises (i) a carboxylated sulfonated polysaccharide and (ii) a non-oxidizing reaction byproduct, and is prepared by contacting a polysaccharide with an oxidizing agent and oxidatively cleaving at least one chemical bond of the polysaccharide selected from the group consisting of a glycosidic linkage and a hydroxylated carbon-carbon bond to form an oxidized polysaccharide and contacting the oxidized polysaccharide with a sulfonating agent to form the carboxylated sulfonated polysaccharide, wherein the carboxylated sulfonated polysaccharide has a ratio of carboxylate functionalities sulfonate functionalities of from about 0.1 to about 4, and wherein the oxidizing agent comprises a material with the general formula Y.nH