Solid rinse aid composition and method of making same

• US 10,421,933 B2
• Filed: 12/28/2016
• Issued: 09/24/2019
• Est. Priority Date: 06/22/2012
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Sun, Xin, Anderson, Derrick, West, Kelsey, Kieffer, Janel Marie, Man, Victor Fuk-Pong, Hunter, Melissa
• Primary Examiner(s): Douyon, Lorna M
• Application Number:
  US15/392,764
• Publication Number:
  US 20170107463A1
• Time in Patent Office: 1,000 Days
• Field of Search: None
• CPC Class Codes: C11D 1/66 Non-ionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/72 Ethers of polyoxyalkylene glycols
• CPC Class Codes: C11D 1/722 Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups C11D1/721 takes precedence
• CPC Class Codes: C11D 1/825 Mixtures of compounds all of which are non-ionic
• CPC Class Codes: C11D 17/0047 Detergents in the form of bars or tablets
• CPC Class Codes: C11D 2111/14 Hard surfaces
• CPC Class Codes: C11D 2111/16 Metals
• CPC Class Codes: C11D 2111/18 Glass; Plastics
• CPC Class Codes: C11D 3/0021 Dye-stain or dye-transfer inhibiting compositions
• CPC Class Codes: C11D 3/042 Acids
• CPC Class Codes: C11D 3/2068 Ethers
• CPC Class Codes: C11D 3/2075 Carboxylic acids-salts thereof
• CPC Class Codes: C11D 3/2082 Polycarboxylic acids-salts thereof
• CPC Class Codes: C11D 3/2086 Hydroxy carboxylic acids-salts thereof
• CPC Class Codes: C11D 3/3418 Toluene -, xylene -, cumene -, benzene - or naphthalene sulfonates or sulfates
• CPC Class Codes: C11D 3/3463 containing thio sulfate or sulfite groups

Abstract

The invention includes a solid rinse aid that is particularly designed for pressed or extrusion solid formation and which is effective for spotless surfaces after rinsing, especially rinsing metals without corrosion. According to the invention, a solid acid is combined with a short-chain alkylbenzene and alkyl naphthalene sulfonate. The short-chain alkylbenzene and alkyl naphthalene sulfonate act as a solidification agent as well as a hydrotrope, and total dissolved solid (TDS) active and are combined with at least one nonionic low foaming surfactant.

Claims

1. A method of making a solid rinse aid composition comprising:

a. admixing a solid acid, nonionic surfactant, and one or more short chain alkyl benzene and/or alkyl naphthalene sulfonates to form a mixture;

b. allowing said mixture to set and thereafter;

c. mixing in any liquid components comprising a preservative, additional surfactant, water, dye, or combination thereof to form a rinse aid mixture;

d. forming a solid rinse aid composition with the rinse aid mixture,

wherein the solid rinse aid composition comprises from about 5 wt. % to about 40 wt. % of the solid acid;

from about 65 wt. % to about 90 wt. % of the one or more short chain alkyl benzene and/or alkyl naphthalene sulfonates, wherein said one or more short chain alkyl benzene and/or alkyl naphthalene sulfonates includes one or more of the following;

sodium xylene sulfonate, sodium toluene sulfonate, sodium cumene sulfonate, potassium toluene sulfonate, ammonium xylene sulfonate, calcium xylene sulfonate, sodium C1-C4 naphthalene sulfonate, and sodium butylnaphthalene sulfonate; and

from about 5 wt. % to about 30 wt. % of the nonionic surfactant;

wherein said solid acid does not contain fatty acid or fatty acid salt; and

wherein said solid rinse aid composition provides a use solution with a pH of less than 2.

2. The method of claim 1 wherein said forming a solid is by pressing.

3. The method of claim 1 wherein said forming a solid is by extrusion.

4. The method of claim 1 wherein said mixture is allowed to set for 1 or more days.

5. The method of claim 1, wherein the solid rinse aid composition further comprises from 0.05 wt. % to about 20 wt. % of a preservative.

6. The method of claim 5, wherein the preservative comprises 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.

7. The method of claim 1, wherein the solid rinse aid composition further comprises from 0.1 wt. % to about 30 wt. % of a chelant.

8. The method of claim 7, wherein said chelant is an aminocarboxylate.

9. The method of claim 1, wherein said solid acid is citric acid.

10. The method of claim 1, wherein said nonionic surfactant is a low foaming surfactant.

11. The method of claim 10, wherein the solid rinse aid composition is formed by extrusion and wherein said low foaming surfactant is present in an amount of from about 5 wt. % to about 30 wt. %.

12. The method of claim 10, wherein the solid rinse aid composition is formed by pressing and wherein said low foaming surfactant is present in an amount of from about 5 wt. % to about 20 wt. %.

13. The method of claim 1, wherein said solid acid is present in an amount of from about 15 wt. % to about 25 wt. %.