Methods and compositions for cleaning and decontamination

• US 5,670,469 A
• Filed: 01/06/1995
• Issued: 09/23/1997
• Est. Priority Date: 01/06/1995
• Status: Expired due to Fees

• Current Assignee: Texas Research International Incorporated
• Original Assignee: Industrial Research Institute
• Inventors: Zoch, Walter P., Mayfield, Thomas R., Bray, Alan, Rushing, Rock A., Dingus, Michael L.
• Primary Examiner(s): EINSMANN, MARGARET V
• Application Number:
  US08/369,548
• Time in Patent Office: 991 Days
• Field of Search: 252/174.23, 252/174.21, 252/170, 252/162, 252/551, 252/174.17, 252/301.19, 252/408.1, 8/403, 106/26 R, 106/20, 106/32, 510/274, 510/365, 510/406-426, 510/301.19, 510/408.1
• US Class Current: 510/274
• CPC Class Codes: C11D 3/18 Hydrocarbons C11D3/164 takes precedence
• CPC Class Codes: C11D 3/2003 Alcohols; Phenols
• CPC Class Codes: C11D 3/3707 Polyethers, e.g. polyalkyleneoxides
• CPC Class Codes: C11D 3/40 Dyes ; Pigments

Abstract

Improved compositions containing a visible coloring agent, such as a pigment or dye, together with a polymer or hydroxylated aliphate alcohol, and an active ingredient defined as a surfactant, a therapeutic agent or biocide, are disclosed. The detectable agent is readily visible under normal white light, and provides a technique for monitoring disturbed and undisturbed areas on a surface. Such is useful in the described methods for cleaning and/or decontaminating a surface, such as in the decontamination of equipment and clothing used during hazardous spill response. The compositions are adherent to a variety of different materials, including Teflon®. This makes the preparations particularly useful in the cleaning and decontamination of non-flat and curved surfaces, such as on protective garments. The compositions in particular embodiments include a visually detectable coloring agent (such as a colored pigment), a surfactant (such as ethoxylate alcohol), an emulsifier (such as carboxymethyl cellulose), an extender (such as PEG), and a solvent (such as d-limonene). These compositions may also include water or other suitable diluent.

Claims

1. A composition comprising:

(a) about 1% to about 90%/weight of a surfactant consisting essentially of sulfated ethoxylate alcohol or nonyl-phenol ethoxylate;

(b) about 0.1% to about 90%/weight of a solvent consisting essentially of a terpene;

(c) about 1% to about 80%/weight of a viscosity builder/emulsifier selected from the group consisting of carboxymethylcellulose, plant gum, polyvinylpyrrolidone, polyvinyl alcohol, alginates, pectin, gelatin, polyacrylamide, and polyacrylic acid liquid;

(d) about 0.1% to about 90%/wt of a colored pigment; and

(e) about 20% to about 95%/wt of a compound that is a liquid at room temperature selected from the group consisting of polyethylene glycol, polypropylene glycol, a glycol ester, and n-methyl pyrrolidine,

wherein the composition retains the original pigment color upon application to a surface.

2. The composition of claim 1 wherein the terpene is limonene.

3. The composition of claim 1 wherein the colored pigment is a synthetic pigment, an inorganic pigment, an organic pigment or a plant-based pigment.

4. The composition of claim 1 further defined as comprising:

(a) about 5% to about 25% of surfactant consisting essentially of sulfated ethoxylate alcohol;

(b) about 2% to about 25% solvent consisting essentially of a terpene;

(c) about 2% to about 25% viscosity builder/emulsifier consisting essentially of carboxymethylcellulose;

(d) about 2% to about 25% of the colored pigment;

(e) about 30% to about 70% polymer consisting essentially of polyethylene glycol.

5. A composition comprising:

(a) about 18% to about 22%/w sulfated ethoxylate alcohol;

(b) about 12% to about 18%/w limonene;

(c) about 10% to about 15%/w carboxymethylcellulose;

(d) about 10% to about 15%/w organic colored pigment; and

(e) about 40% to about 50%/w liquid polyethylene glycol.

6. A composition comprising:

(a) about 1.2% to about 1.7%/w sulfated ethoxylate alcohol;

(b) about 1.0% to about 1.4%/w limonene;

(c) about 1.0% to about 1.4%/w carboxymethylcellulose;

(d) about 1.0% to about 1.4%/w organic colored pigment; and

(e) about 4.1% to about 5.8%/w liquid polyethylene glycol.

7. A composition comprising;

(a) about 42% to about 48%/wt liquid polyethylene glycol;

(b) about 28% to about 32%/wt sulfated ethoxylate alcohol;

(c) about 10% to about 15%/wt pigment;

(d) about 10% to about 15%/wt limonene; and

(e) about 10% to about 15%/wt carboxymethylcellulose.

10. A method for cleaning a surface comprising:

(a) applying to a surface suspected of having a contaminating substance the composition of claim 7 or 8; and

(b) removing the composition from the surface.

11. The method of claim 10 wherein step (b) comprises wetting the surface, scrubbing areas of the surface that include the composition and rinsing.

12. The method of claim 10 further comprising a step (c) comprising examining the surface for residual composition and removing residual visually detectable coloring agent from the surface.

13. The method of claim 10 wherein the surface is metal.

14. The method of claim 10 wherein the contaminating substance is soil, grease, blood, soot, or a mixture thereof.

15. The method of claim 10 wherein the composition further comprises an insecticide, a herbicide, or a mixture thereof.

16. A cleaning kit comprising:

a composition as defined in claim 7 or 8.

8. A composition comprising;

(a) about 1% to about 5%/wt sulfated ethoxylate alcohol;

(b) about 1% to about 2%/wt limonene;

(c) about 1% to about 5%/wt colored pigment;

(d) about 2.0% to about 10%/wt carboxymethyl cellulose; and

(e) about 78% to about 95%/wt water.

9. The composition of claim 8 comprising about 90%/wt water.