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US 4,863,980 AGranted
Organophilic modified polymers
AssigneeVenture Chemicals, Inc.
InventorsJack C. Cowan, Roy F. House, Victor M. Granquist
Life of this patent
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Abstract
Organophilic polymer adducts which are effective fluid loss control additives for oil base well-working fluids are prepared from an anionic or cationic water soluble polymer and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegetable oils, most preferably commercial lecithin. Preferred polymers comprise polysaccharides or derivatives thereof and synthetic polymers.
Claims5
An organophilic polymer comprising an adduct of a cationic or anionic polysaccharide or derivative thereof and one or more phosphatides having the empirical formula
- R.sub.1 --CO--O--CH.sub.2 --CH(R.sub.2)--CH.sub.2 --Q (I)
- where:
- R.sub.1 is an aliphatic group containing from 8 to 29 carbon atoms;
- R.sub.2 is selected from the group consisting of H, OH, R.sub.1 COO, and OP(O)(O.sup.- zM.sup.a+)OZ;
- Q is selected from the group consisting of R.sub.1 COO and OP(O)(O.sup.- zM.sup.a+)OZ;
- Z is selected from the group consisting of xM.sup.a+, C.sub.6 H.sub.6 (OH).sub.5 and CH.sub.2 --CH(Y)--N(R.sub.3)(R.sub.4)(R.sub.5)y(A.sup.b-).sub.v ;
- Y is selected from the group consisting of H and COO(xM.sup.a+);
- R.sub.3, R.sub.4, and R.sub.5 are independently selected from the group consisting of H, aliphatic groups containing from 1 to 30 carbon atoms, and R.sub.6 CO;
- R.sub.6 is an aliphatic group containing from 1 to 29 carbon atoms;
- M is a cation selected from the group consisting of H, an alkali metal, an alkaline earth metal, ammonium, and mixtures thereof;
- A is an anion valence of b;
- y=0 or 1;
- w, x, and z=0 or 1/a where a is the valence of M;
- v=0 or a/b;
- and where Q is R.sub.1 COO only when R.sub.2 is OP(O)(O.sup.- zM.sup.a+)OZ.
12 more elements
Dependencies are inferred from the claim text.