Low foaming and high stability hydrotrope formulation comprising an alkyl glucoside having eight or fewer carbon atoms

Patent metadata

Field	Value
Publication number	US-9879205-B2
Application number	US-201415302742-A
Country	US
Kind code	B2
Filing date	May 9, 2014
Priority date	May 9, 2014
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

An aqueous solution contains a nonionic surfactant, a alkyl phenoxy polyethoxy phosphate and an alkyl glucoside selected from a group consisting of alkyl glucosides characterized by the alkyl group having eight or fewer carbons and when the alkyl group has eight carbons it is a branched alkyl having a linear six carbon chain with a two carbon branch, where the aqueous solution is further characterized by containing less than 0.3 weight-percent cumene sulfonic acid or its alkali salt based on total aqueous solution weight and the alkyl glucoside is present at a concentration greater than alkyl glucosides having an alkyl group with more than eight carbons, as well as its uses for increasing the cloud point and decreasing the foaming properties.

First claim

What is claimed is:

1. An aqueous solution comprising:
a) an alkyl phenoxy polyethoxy phosphate;
b) an alkyl glucoside selected from the group consisting of alkyl glucosides characterized by the alkyl group having eight or fewer carbons, and when the alkyl group has eight carbons, it is a branched alkyl having a linear six carbon chain with a two carbon branch; and
c) a nonionic surfactant different from component b,
wherein the aqueous solution is further characterized by containing less than 0.3 weight-percent cumene sulfonic acid or its alkali salt based on the total aqueous solution weight, and the alkyl glucoside having eight or fewer carbon atoms is present at a concentration greater than alkyl glucosides having an alkyl group with more than eight carbons atoms, if said alkyl glucosides are present.

2. The aqueous solution of claim 1 , where the concentration of alkyl phenoxy polyethoxy phosphate is less than 100 weight-percent and 40 weight-percent or more based on the combined weight of alkyl phenoxy polyethoxy phosphate and alkyl glucoside.

3. The aqueous solution of claim 1 , further characterized by the aqueous solution being free of alkyl glucosides having alkyl groups containing more than eight carbons.

4. The aqueous solution of claim 1 , further characterized by the glucoside being selected from the group consisting of alkyl glucosides characterized by their alky group having a linear six carbon alkyl chain or a linear six carbon alkyl chain with a two carbon branch.

5. The aqueous solution of claim 1 , further characterized by the alkyl group of the glucoside having six or fewer carbons.

6. The aqueous solution of claim 1 , further characterized by the nonionic surfactant being a copolymer of ethylene oxide and propylene oxide.

7. The aqueous solution of claim 1 , further comprising an electrolyte.

8. A process for increasing the cloud point and decreasing the foaming properties of an aqueous nonionic surfactant solution comprising combining in an aqueous continuous phase to form a solution the following components:
a) an alkyl phenoxy polyethoxy phosphate;
b) an alkyl glucoside selected from the group consisting of alkyl glucosides characterized by the alkyl group having eight or fewer carbons, and when the alkyl group has eight carbons, it is a branched alkyl having a linear six carbon chain with a two carbon branch; and
c) a nonionic surfactant different from component b,
wherein the aqueous solution is further characterized by containing less than 0.3 weight-percent cumene sulfonic acid or its alkali salt based on the total aqueous solution weight, and the alkyl glucoside having eight or fewer carbon atoms is present at a concentration greater than alkyl glucosides having an alkyl group with more than eight carbons atoms, if said alkyl glucosides are present.

9. The process of claim 8 , further characterized by the glucoside being selected from the group consisting of alkyl glucosides characterized by their alky group having a linear six carbon alkyl chain or a linear six carbon alkyl chain with a two carbon branch.

10. The process of claim 8 , further characterized by the alkyl group of the glucoside having six or fewer carbons.

11. The process of claim 8 , further characterized by further combining an electrolyte when forming the solution.

12. The process of claim 8 , further characterized by the nonionic surfactant being a copolymer of ethylene oxide and propylene oxide.

Assignees

• Dow Global Technologies Llc

Inventors

• Liang Bing
• Mu Jianhai

Classifications

• C11D1/83 Primary

  Mixtures of non-ionic with anionic compounds · CPC title

• C11D1/345

  Phosphates or phosphites · CPC title

• C11D3/3707

  Polyethers, e.g. polyalkyleneoxides · CPC title

• C11D1/662

  Carbohydrates or derivatives · CPC title

• C11D3/0026

  Low foaming or foam regulating compositions · CPC title