发明名称 LOW VISCOSITY HETEROPOLYSACCHARIDES
摘要 Low-viscosity heteropolysaccharides, viz. xanthan gum and S-194 of viscosity 15 to 100 mPa.s and guar gum of viscosity 15 to 100 mPa.s, the viscosities being measured in 5 wt% aqueous solution on a Brookfield LVT viscometer at 25 DEG C, spindle 2,60 rpm, are novel. They are made by heating a xanthan gum, S-194, or guar gum solution at 48 DEG to 83 DEG C in the presence of 0.05 to 0.25% EDTA, 0.01 to 0.1% ferrous sulfate, and 2-6% hydrogen peroxide. These gums are especially useful in preparing herbicidal compositions and form novel complexes with herbicidal bipyridinium salt by mixing under aqueous conditions and drying.
申请公布号 AU6356786(A) 申请公布日期 1987.04.09
申请号 AU19860063567 申请日期 1986.10.07
申请人 MERCK & CO., INC. 发明人 GEORGE T. COLEGROVE;THOMAS A. LINDROTH
分类号 C07D213/30;A01N25/10;A01N43/40;A01N43/90;A01N61/00;A01N63/00;A01N63/02;C07D413/14;C07D471/14;C08B37/00;C08B37/14 主分类号 C07D213/30
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