Polymer compositions

Patent metadata

Field	Value
Publication number	US-9854796-B2
Application number	US-201615130254-A
Country	US
Kind code	B2
Filing date	Apr 15, 2016
Priority date	Sep 1, 2009
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A composition contains an incompletely hydrated water soluble polymer suspended in a liquid medium.

First claim

The invention claimed is:

1. A composition comprising:
aqueous liquid medium, wherein the aqueous liquid medium is a continuous single phase liquid medium comprising water in an amount greater than or equal to 10 wt. % and optionally water insoluble or water immiscible components dispersed in the continuous phase of the aqueous liquid medium;
water-soluble polymer selected from the group consisting of non-derivatized guar polymers, derivatized guar polymers having molar substitution from 0.01 to 3, and mixtures thereof, in an amount greater than 2.1 to 12 wt. %, wherein the water-soluble polymer has a weight average molecular weight from about 100,000 g/mol to about 5,000,000 g/mol;
fumed silica as a suspending agent in an amount from 0.5 to 5 wt. % and effective to impart shear thinning properties and yield strength to the composition;
at least one alkyl betaine surfactant in an amount from 5 to 40 wt. %, the alkyl betaine surfactant having an aliphatic substituent comprising 8 to 18 carbon atoms; and
at least one guar hydration inhibitor selected from the group consisting of water-soluble non-surfactant salts in an amount from 5 to 45 wt. %, the non-surfactant salts comprising ammonium sulfate and optionally sodium chloride, wherein a combined amount of the non-surfactant salt and the surfactant is from 20 to 50 wt. %, wherein the combined amount is effective to inhibit hydration of the water-soluble polymer in the water such that the water-soluble polymer is incompletely hydrated, and the incompletely hydrated water-soluble polymer is suspended in the aqueous liquid medium,
wherein at least a portion of the incompletely hydrated water-soluble polymer is in the form of particles and at least a portion of such particles are suspended in the liquid medium, and
wherein the incompletely hydrated water-soluble polymer comprises at least one of non-hydrated water-soluble polymer and partially hydrated water-soluble polymer.

2. The composition of claim 1 , wherein the hydration inhibitor is ammonium sulfate.

3. The composition of claim 1 , wherein the derivatized guar polymer is selected from at least one member of the group consisting of carboxymethyl guar, carboxymethylhydroxypropyl guar, cationic hydroxpropyl guar, hydroxyethyl guar, hydroxypropyl guar, hydroxybutyl guar, higher hydroxylalkyl guars, carboxymethyl guar, carboxylpropyl guar, carboxybutyl guar, and carboxyalkyl guars.

4. The composition of claim 1 , wherein there is an absence of water dispersible organic solvent.

5. The composition of claim 1 , wherein the surfactant is C12-C14 alkyl dimethyl betaine.

6. The composition of claim 1 , wherein the composition exhibits a viscosity of less than 10 Pa·s at a shear rate of greater than or equal to 10 s−1.

7. The composition of claim 1 , wherein the composition exhibits:
(a) a viscosity of greater than or equal to 5 Pa·s at a shear rate of less than 0.01 s−1, and
(b) a viscosity of less than 5 Pa·s at a shear rate of greater than 10 s−1.

8. The composition of claim 1 , further comprising a pesticide active ingredient, wherein the water soluble polymer enhances delivery of the pesticide active ingredient from the liquid medium to a target substrate.

9. The composition of claim 1 , wherein the incompletely hydrated water-soluble polymer is non-hydrated water-soluble polymer.

10. The composition of claim 1 , wherein the water-soluble polymer is in an amount greater than 2.5 to 12 wt. %.

11. The composition of claim 1 , further comprising a water dispersible organic solvent selected from at least one member of the group consisting of methanol, ethanol, propanol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, poly(ethylene glycol)s, ethylene glycol monobutyl ether, dipropylene glycol methyl ether, and ethylene glycol phenyl ether, wherein the water dispersible organic solvent is present in an amount up to 1 wt. %.

12. The composition of claim 1 , comprising 44.32 to 52.86% water, wherein the hydration inhibitor is ammonium sulfate and optionally sodium chloride, the surfactant is (C 12 -C 14 )alkyl dimethyl betaine, the guar is at least one of non-derivatized guar and hydroxypropyl guar, and the suspension aid is fumed silica.

13. A method for making an agricultural pesticide composition comprising:
mixing the composition of claim 1 with an agricultural pesticide compound, optionally other agricultural adjuvants, and water to form a pesticide composition for spray application to target pests.

14. A method for making the composition according to claim 1 , the method comprising:
contacting the water with the surfactant and the hydration inhibitor to form an aqueous mixture;
contacting the water soluble polymer to the aqueous mixture to disperse the water soluble polymer, and
contacting the suspending agent to the aqueous mixture and water soluble polymer to make the composition.

15. A composition comprising:
aqueous liquid medium, wherein the aqueous liquid medium is a continuous single phase liquid medium comprising water and optionally water insoluble or water immiscible components dispersed in the continuous phase of the aqueous liquid medium;
water-soluble polymer selected from the group consisting of non-derivatized guar polymers, derivatized guar polymers having molar substitution from 0.01 to 3, and mixtures thereof, wherein the water-soluble polymer has a weight average molecular weight from about 100,000 g/mol to about 5,000,000 g/mol;
fumed silica as a suspending agent and effective to impart shear thinning properties and yield strength to the composition;
(C12-C14) alkyl dimethyl betaine surfactant; and
at least one guar hydration inhibitor;
wherein the combined amount of the surfactant and the water-soluble non-surfactant salt is effective to inhibit hydration of the water-soluble polymer in the water such that the water-soluble polymer is incompletely hydrated, and the incompletely hydrated water-soluble polymer is suspended in the aqueous liquid medium,
wherein at least a portion of the incompletely hydrated water-soluble polymer is in the form of particles and at least a portion of the particles are suspended in the liquid medium,
wherein the incompletely hydrated water-soluble polymer comprises at least one of non-hydrated water-soluble polymer and partially hydrated water-soluble polymer;
the water in an amount of 44.32 to 63.012 wt. %,
the guar hydration inhibitor comprises ammonium sulfate in an amount of 25.646 to 30 wt. % and sodium chloride in an amount of 0 to 1.197 wt. %,
the (C 12 -C 14 )alkyl dimethyl betaine surfactant in an amount of 5.129 to 17 wt. %,
the water-soluble polymer in an amount of 2.1 to 9.66 wt. %, and
the fumed silica in an amount of 0.822 to 4.73 wt. %.

16. The composition of claim 15 , wherein the guar polymer is at least one of non-derivatized guar and hydroxypropyl guar, the guar polymer in an amount from 4 to 9.66 wt. %.

17. The composition of claim 15 , wherein the composition exhibits a viscosity of less than 10 Pa·s at a shear rate of greater than or equal to 10 s −1 and the guar polymer is in an amount of 2.5 to 9.66 wt. %.

18. The composition of claim 15 , wherein there is an absence of water dispersible organic solvent.

19. The composition of claim 15 , further comprising up to 1 wt. % water dispersible organic solvent, the water dispersible organic solvent selected from at least one member of the group consisting of methanol, ethanol, propanol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, polv(ethvlene glycol)s, ethylen

Assignees

• Rhodia Operations

Inventors

• Wu Dan
• Shanmuga Krish
• Goyal Rajesh

Classifications

• A61Q19/00

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• C09K8/68

  containing organic compounds · CPC title

• A61K2800/48

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• A23L29/27

  Xanthan not combined with other microbial gums · CPC title

• C08L33/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title