Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1991-04-01
1992-11-10
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524548, C08K 300, C08L 3906
Patent
active
051624176
ABSTRACT:
What is provided herein is a gelled acidizer composition which comprises an aqueous acid solution and a gelling agent therein which is a strongly swellable, moderately crosslinked polyvinylpyrrolidone polymers in the form of fine, white powders characterized by (a) an aqueous swelling parameter defined by its gel volume of about 15 to 150 ml/g of polymer and (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps.
REFERENCES:
patent: 4873299 (1989-10-01), Nowakowsky et al.
Chuang Jui-Chang
Niu Joseph
Shih Jenn S.
ISP Investments Inc.
Katz Walter
Maue Marilyn J.
Schofer Joseph L.
Smith Jeffrey T.
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