Concentrated suspensions of water soluble polymers
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United States of America Patent
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Apr 10, 1990
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Jan 17, 1989
filing date -
Feb 14, 1983
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Abstract
The invention provides concentrated suspensions of high molecular weight water soluble polymers comprising a high molecular weight water soluble polymer, a nonpolymer solvating organic diluent, a swelling agent and a low molecular weight polymer adjuvant, soluble in water and having functional carboxylic acid (or salt) groups thereon and methods for preparing same and the use thereof in the preparation of dilute aqueous thickening solutions suitable for use in various industrial applications, including the petroleum industry and, in particular, the secondary recovery of petroleum from underground well deposits in oil fields.
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