| 摘要 |
Carboxymethylhydroxyethyl (CMHEC), starch and guar are preferred polysaccharides providing at least a 1% solution viscosity of 1000 cps at 25 C. An invert emulsion for oil drilling or paper manufacture comprises on a weight percent basis: -Diesel, mineral or paraffin oil 40-60 -Imidazole surfactant 1-4 -Water 0-10 -Organophilic clay 0.5-5.0 -CMHEC, starch or guar 40-60 -
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