Substituted cellulose acetates and uses thereof
View Patent ↗The present invention relates to substituted cellulose acetates and methods of use thereof. One embodiment of the present invention provides a drilling fluid having a base fluid and a viscosifier having a substituted cellulose acetate having a polar substituent that comprises an oxygen atom covalently bonded to a nonmetal selected from the group of sulfur, phosphorus, boron, and chlorine; where the nonmetal is present in at least about 0.01% by weight of the substituted cellulose acetate.
1. A paint composition comprising:
a pigment; and
a stabilizing film forming agent that comprises a substituted cellulose acetate comprising an acetate substituent and a polar substituent that comprises an oxygen atom covalently bonded to a nonmetal selected from the group consisting of: sulfur, phosphorus, boron, and chlorine; wherein a degree of polar substituent substitution is about 0.005 to about 0.02; and wherein a degree of acetate substitution is greater than the degree of polar substituent substitution.
2. The paint composition of claim 1 wherein the nonmetal is present in no more than 25% by weight of the substituted cellulose acetate.
3. The paint composition of claim 1 wherein the pigment comprises a pigment selected from the group consisting of: clay, calcium carbonate, mica, silica, talc, titanium dioxide, and any combination thereof.
4. The paint composition of claim 1 further comprising at least one element selected from the group consisting of: a solvent, a filler, an antifreeze additive, a catalyst, a thickener, an adhesion promoter, a UV stabilizer, a de-glossing agent, a biocide, and any combination of these.
5. The paint composition of claim 4 wherein the solvent comprises a solvent selected from the group consisting of: an aliphatic solvent, an aromatic solvent, an alcohol, a ketone, a hydrocarbon, an ester, a petroleum distillate, water, any derivative thereof, and any combination thereof.
6. The paint composition of claim 4 wherein the filler comprises a filler selected from the group consisting of: diatomaceous earth, talc, lime, barite, clay, any derivative thereof, and any combination thereof.
7. A method comprising:
providing a paint comprising:
a pigment; and
a stabilizing film forming agent that comprises a substituted cellulose acetate comprising an acetate substituent and a polar substituent that comprises an oxygen atom covalently bonded to a nonmetal selected from the group consisting of: sulfur, phosphorus, boron, and chlorine; wherein a degree of polar substituent substitution is about 0.005 to about 0.02; and wherein a degree of acetate substitution is greater than the degree of polar substituent substitution; and
coating a surface with the paint.
8. The method of claim 7 wherein the nonmetal is present in no more than 25% by weight of the substituted cellulose acetate.
9. The method of claim 7 wherein the pigment comprises a pigment selected from the group consisting of: clay, calcium carbonate, mica, silica, talc, titanium dioxide, and any combination of these.
10. The method of claim 7 wherein the paint further comprises at least one element selected from the group consisting of: a solvent, a filler, an antifreeze additive, a catalyst, a thickener, an adhesion promoter, a UV stabilizer, a de-glossing agent, a biocide, and any combination of these.
11. The method of claim 10 wherein the solvent comprises a solvent selected from the group consisting of: an aliphatic solvent, an aromatic solvent, an alcohol, a ketone, a hydrocarbon, an ester, a petroleum distillate, water, and any combination of these.
12. The method of claim 10 wherein the filler comprises a filler selected from the group consisting of: diatomaceous earth, talc, lime, barite, clay, and any combination of these.
13. The paint composition of claim 1 wherein the degree of acetate substitution is about 0.4 to 3.
14. The paint composition of claim 1 wherein the degree of acetate substitution is about 1 to 3.
15. The paint composition of claim 1 wherein the degree of acetate substitution is about 2 to 3.
16. The paint composition of claim 1 wherein the paint composition is not an emulsion.
17. The paint composition of claim 7 wherein the paint composition is not an emulsion.
18. The paint composition of claim 1 wherein the degree of acetate substitution is about 0.4 to about 1.
19. The paint composition of claim 1 wherein the degree of acetate substitution is about 1 to about 2.
20. A paint composition comprising:
a pigment; and
a stabilizing film forming agent that comprises a substituted cellulose acetate comprising an acetate substituent and a polar substituent that comprises an oxygen atom covalently bonded to a nonmetal selected from the group consisting of: sulfur, phosphorus, boron, and chlorine; wherein a degree of polar substituent substitution is about 0.005 to about 0.02; and wherein a degree of acetate substitution is about 0.4 to 3.