Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From lignin – tannin – or derivative reactant
Patent
1991-04-23
1992-09-15
Nutter, Nathan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From lignin, tannin, or derivative reactant
C08H 502
Patent
active
051479648
ABSTRACT:
A process for forming an oil well cement composition comprising: mixing cement and a vinyl grafted wattle tannin fluid loss additive, the vinyl grafted wattle tannin comprising a wattle tannin grafted with at least one vinyl monomer selected from the group consisting of: 2-acrylamido-2-methylpropanesulfonic acid and acrylamide, wherein the wattle tannin is present in an amount of between about 0.05 to about 14 weight percent based on actives, the 2-acrylamido-2-methylpropanesulfonic acid is present in an amount of between about 68 to about 99.95 percent, and acrylamide is present in an amount of between about 0 to about 18 percent, to form a cement blend; and mixing the cement blend with water.
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Gabel Robert K.
Huddleston David A.
Williamson Charles D.
Mullis Jeffrey C.
Nalco Chemical Company
Nutter Nathan M.
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