Surfactant responsive dispersion polymerized micro-gels

Patent metadata

Field	Value
Publication number	US-9714376-B2
Application number	US-201214344816-A
Country	US
Kind code	B2
Filing date	Sep 13, 2012
Priority date	Sep 13, 2011
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The crosslinked, nonionic amphiphilic polymer is prepared by dispersion polymerization in the presence of a stabilizing polymer. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.

First claim

What is claimed is:

1. A yield stress fluid composition comprising water, at least one nonionic, crosslinked, amphiphilic polymer and at least one surfactant wherein the concentration of said polymer ranges from 0.5 to 5 wt. % and the concentration of said surfactant ranges from 1 to 30 wt. % (active weight basis), based on the total weight of the composition, wherein said at least one nonionic, crosslinked, amphiphilic polymer is devoid of ionic or ionizable moieties and is prepared from a monomer mixture comprising at least one hydrophilic monomer selected from a vinyl lactam; at least one hydrophobic monomer selected from one or more vinyl esters of aliphatic carboxylic acids containing 1 to 22 carbon atoms, one or more of esters of (meth)acrylic acid with alcohols containing 1 to 30 carbon atoms, and mixtures thereof, and an associative monomer and/or a semi-hydrophobic monomer, and wherein said yield stress is substantially independent of pH in the pH range from about 2 to about 14.

2. A composition of claim 1 wherein said polymer is prepared from a monomer mixture comprising at least 30 wt. % of said hydrophilic monomers and at least 5 wt. % of said hydrophobic monomers.

3. A composition of claim 2 wherein said monomer mixture comprises a crosslinking monomer which is present in an amount sufficient to be incorporated into said polymer from about 0.01 to about 1 wt. %, based on the total weight of the polymer.

4. A composition of claim 3 wherein the at least one crosslinking monomer is selected from polyallyl ethers of trimethylolpropane, polyallyl ethers of pentaerythritol, polyallyl ethers of sucrose, and mixtures thereof.

5. A composition of claim 1 wherein said vinyl lactam is N-vinyl pyrrolidone, and said one or more vinyl esters of aliphatic carboxylic acids containing 1 to 22 carbon atoms is selected from vinyl formate, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl valerate, vinyl hexanoate, vinyl 2-methylhexanate, vinyl 2-ethylhexanoate, vinyl iso-octanoate, vinyl nonanoate, vinyl neodecanoate, vinyl decanoate, vinyl versatate, vinyl laurate, vinyl palmitate, vinyl stearate, and mixtures thereof.

6. A composition of claim 1 wherein the at least one surfactant is selected from an anionic, cationic, amphoteric, nonionic, and mixtures thereof.

7. A composition of claim 6 wherein the at least one surfactant is selected from an anionic surfactant and an amphoteric surfactant.

8. A composition of claim 7 wherein the at least one anionic surfactant is ethoxylated.

9. A composition of claim 8 containing a mixture of surfactants wherein at least 75 wt. % of said surfactant mixture is composed of surfactants containing ethylene oxide moieties.

10. A composition of claim 7 wherein the at least one amphoteric surfactant is cocamidopropyl betaine.

11. A composition of claim 7 wherein the concentration of surfactant ranges from about 6 to about 20 wt. % (active material), based on the weight of the total composition.

12. A composition of claim 7 wherein the ratio of anionic surfactant to amphoteric surfactant (active material) is 10:1 to about 2:1.

13. A composition of claim 6 wherein the at least one anionic surfactant is selected from sodium dodecyl sulfate, sodium lauryl sulfate, sodium laureth sulfate, and mixtures thereof.

14. A composition of claim 1 wherein said yield stress is at least 0.1 Pa.

15. A composition of claim 1 wherein said polymer is a dispersion polymer.

16. A composition of claim 15 wherein said polymer is prepared from 95 to 99.5 wt. % of a combination of at least one vinyl lactam and at least one vinyl ester of a C 1 -C 22 carboxylic acid, wherein at least 30 wt. % of said monomer combination is selected from a vinyl lactam, 0.05 to 5 wt. % of at least one C 8 -C 22 alkyl (meth)acrylate, optionally up to 5 wt. % of an associative and/or a semi-hydrophobic monomer (said weight percent is based on the weight of the total monomers), and 0.01 to 1 wt. % of a crosslinking monomer (based on the weight of the dry polymer).

17. A composition of claim 16 wherein said vinyl lactam is N-vinyl pyrrolidone, and said vinyl ester is selected from vinyl formate, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl valerate, vinyl hexanoate, vinyl 2-methylhexanate, vinyl 2-ethylhexanoate, vinyl iso-octanoate, vinyl nonanoate, vinyl neodecanoate, vinyl decanoate, vinyl versatate, vinyl laurate, vinyl palmitate, vinyl stearate, and mixtures thereof, and said C 8 -C 22 alkyl (meth)acrylate is selected from lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, and mixtures thereof; and mixtures thereof.

18. A composition of claim 17 wherein said dispersion polymer is polymerized from a monomer mixture comprising 30 to 90 wt. % of N-vinyl pyrrolidone, 10 to 35 wt. % of at least one vinyl ester selected from vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl valerate, vinyl hexanoate, vinyl 2-methylhexanate, vinyl 2-ethylhexanoate, vinyl iso-octanoate, vinyl nonanoate, vinyl neodecanoate, vinyl decanoate, vinyl versatate, vinyl laurate, vinyl palmitate, and vinyl stearate, 0 to 35 wt. % dimethylacrylamide, 0.5 to 5 wt. % of an C 8 -C 22 alkyl (meth)acrylate selected from lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, and mixtures thereof.

19. A composition of claim 18 wherein said dispersion polymer is prepared from a monomer mixture comprising N-vinyl pyrrolidone, vinyl acetate, and a C 8 -C 22 alkyl (meth)acrylate selected from lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, and mixtures thereof; and mixtures thereof.

20. A composition of claim 19 wherein said dispersion polymer is polymerized from a monomer mixture comprising 60 to 90 wt. % of N-vinyl pyrrolidone.

21. A composition in claim 16 further comprising an electrolyte.

22. A composition of claim 21 wherein said electrolyte is selected from potassium pyrophosphate, potassium tripolyphosphate, sodium or potassium citrate, calcium chloride and calcium bromide, zinc halides, barium chloride calcium nitrate, potassium chloride, sodium chloride, potassium iodide, sodium bromide, and ammonium bromide, alkali metal or ammonium nitrates, and blends thereof.

23. A composition of claim 16 further comprising an insoluble material, a particulate material, or combinations thereof.

24. A composition of claim 23 wherein said particulate material is selected from mica, coated mica, pigments, exfoliants, anti-dandruff agents, clay, swellable clay, laponite, microsponges, cosmetic beads, cosmetic microcapsules, flakes, and mixtures thereof.

25. A composition of claim 23 wherein said particulate material is selected from sand, sintered bauxite, glass balls, ceramic materials, polystyrene beads, and mixtures thereof.

26. A composition of claim 23 wherein said insoluble material is selected from gas bubbles, liposomes, silicones, and mixtures thereof.

27. A drilling fluid for use in drilling subterranean formations comprising a yield stress fluid of claim 16 .

28. A hydraulic fracturing fluid for use in fracturing subterranean formations comprising a yield stress fluid of claim 16 .

29. A hydraulic fracturing fluid of claim 28 further comprising a proppant.

30. A composition of claim 16 wherein said associative monomer is selected from cetyl polyeth

Assignees

• Yang Wei-Yeih
• Chari Krishnan
• Hsu Shui-Jen Raymond
• Bhargava Prachur
• Lubrizol Advanced Mat Inc

Inventors

• Yang Wei-Yeih
• Chari Krishnan
• Hsu Shui-Jen Raymond
• Bhargava Prachur

Classifications

• A61Q5/00

  Preparations for care of the hair · CPC title

• C09K8/035 Primary

  Organic additives · CPC title

• C09K8/68

  containing organic compounds · CPC title

• C09K8/665

  containing inorganic compounds (proppants C09K8/80) · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title