Title of Invention	"A DECONTAMINANT COMPOSITION AND A PROCESS FOR THE PREPARATION THE PREPARATION THEREOF"
Abstract	This invention relates to a decontaminant composition comprising 6-12% by wt. of surfactant such as sodium lauryl sulphate, 5-12% by volume of oil such as tetrachloroethylene, 1-3% by volume of cosurfactant such as saturated fatty oil, 0.1-5% by vol. of sequestering agent such as ethylene-diamine tetracetate, 8-12% by wt. of bleaching agent such as bleaching powder and 8-10 % by volume of water.

Full Text

This invention relates to a decontaminant composition and a process for the preparation thereof. Emulsion based decontaminants are rapid decontaminants against broad spectrum insecticidal and other toxic formulations including chemical warfare agents. The decontamination agents known in the art are useful for neutralising organo—phosphorus or organo-sulphur-chlorine-compounds. The decontamination emulsions known in the art comprise of a surfactant, a chemical reagent which is generally sodium or calcium hypochlorite and oil. The surfactant generally used is 27. sodium lauryl sulphate (SLS) and oil used is tetrachloroethylene. However, these are not effective against embedded toxic agent/formulations. Certain toxic chemicals penetrate painted metal or like surfaces ana remain embedded into the painted surface. The slow release of such embedded chemical agents at later stages cause health hazards to individuals working in the vicinity. These embedded toxic chemicals are difficult to remove than those on the surface. Such embedded toxic chemicals can be effectively detoxified only with decontamination emu1sion. Another limitation of the most of decontaminating agents known in the art is that they are either slow acting or are not effective against polymer mixed toxic chemicals i.e. thickened toxic chemicals. These thickened toxic chemicals are not accessible to water, detergent solutions or any such type of decontamination formulation. However, such thickened toxic chemicals can be rapidly detoxified with decontamination emu1sion. Yet. another disadvantage is that the known formulation of the decontamination emulsions is very unstable with a very short shelf life of 24 hours. Still another disadvantage is that the sodium hypochlorite used in the formulation is not readily available in the market and is relatively costlier. Further disadvantage of the above? formulation is that calcium hypochlorite in aqueous medium has differential solubility behaviour with respect to chemical warfare agents which leads to hetergenous reaction mixture and impairs and efficiency of chemical reaction between the active hypochlorite anion and substrate chemical warfare agent. The primary object of the present invention is to propose an decontaminant composition and a process for preparation thereof. The proposed composition is effec tive for decontamination against broad spectrurn of toxic chemicat1s inc1uding orgatnophosphorus , organo-sulphur-chlorine and toxic chemicals like chemical warfare agents which penetrate into the painted metal or like surfaces. Another object, of the present invention is to propose a decontaminants composition and a process for the preparation thereof, wherein the said composition is a rapid detoxicant against toxic chemicals. Yet. another object of the present invention is to propose a decontaminants composition and a process for preparation thereof which provides a composition which is relatively more stable with a shelf life of 03 weeks as compared to the known composition which are highly unstable with a very limited shelf life of only about 24 hours. Still another object of the present invention is to propose a decontaminant composition and a process for preparation thereof wherein the proposed composition Further object, of the present invention is to propose a improved decontaminant composition and a process for preparation thereof, wherein the proposed composition sticks and stays on to the painted metal or likes surfaces and has the capability for efficient decontamination of such surfaces to detoxify the toxic chemicals like chemical warfare agents which get embedded under the paint of such painted metal or like surfaces. An even further object of the present invention is to propose an decontaminant composition and a process for preparation thereof where the proposed composition is non-corrosive so that the surface which is detoxified with this formulation is not damaged by the emulsion during or after completion of the decontamination of the surface, A still further object of the present, invention is to propose a decontaminant composition and a process for preparation thereof wherein the proposed formulation is also effective against thickened toxic chemicals which have been thickened by mixing polymeric materials to the toxic chemicals. Yet further object of the present invention is to propose an improved formulation and a process for preparation thereof which overcomes the problem of differential solubility behaviour exhibited by the calcium hypochlorite used in some of the known emulsion based decontaminants. In the proposed formulation, emulsion dissolves both toxic agent and chemical reagent (bleaching powder) and thus brings reagent and substrate into close proximity for smooth reaction. According to this invention there is provided a decontaminant composition comprising 6-12% by wt. of surfactant such as sodium lauryl sulphate, 5-12% by volume of oil such as tetrachloroethylene, 1-3% by volume of cosurfactant such as saturated fatty oil, 0.1-5% by vol. of sequestering agent such as ethylene-diamine tetracetate, 8-12% by wt. of bleaching agent such as bleaching powder and 8-10 % by volume of water. In accordance with the present invention, said composition comprises a surfactant such as sodium laurly sulphate,, oil such as tetrachlorethylene, a cosurfactant such as a saturated fatty oil preferably being mahua oil, sequestering agent such a ethylene diaminetetracetate. The composite comprises bleaching powder consisting of calcium hypochlorite (Ca (OCI)2, calcium hydroxide Ca(OH)2, calcium chloride and calcium oxide. The composition comprises 6-12% preferably. 8-10% by weight of surfactant, such as sodium lauryl sulphate, 5-12% by volume of preferably 7-10% by volume of oil such as tetrachloroethylene, 1-3% by volume of, preferably 2% by volume of cosurfactant such as mahua oil, 0.1-5% by volume of preferably 1-2% by volume of sequestering agent such as EDTA, TPSP, 8-12% by weight of, preferably 9-10% by weight of commercially available bleaching powder and of water. Further, according to the present invention there is provided a process for the preparation of a decontaminant composition comprising: a) preparing a mixture of surfactant, sequestering agent and water and stirring said mixture. b) adding a paste of reagent bleaching powder to said mixture to form an emulsion and subjecting said emulsion to the step of stirring. Further in accordance with the present invention a mixture of surfactant, such as sodium lauryl sulphate, oil such as tetrachloroethylene, consurfactant such as saturated fatty oil preferably mahua oil, sequestering agent, such as EDTA and water is prepared. A past of reagent powder is prepared and is then added to the aforesaid mixture. According to the present invention the process for the preparation of impiroved formulation for the emulsion based decontaminant comprises of the following steps: a) preparation of a mixture of 8-107. by weight of surfactant, 7-107. by volume of tetrachloroethylene, 2"/. by volume of saturated fatty oil preferably mahua oil, 1-27. by volume of ethylene-diamine-tetra-acetate (EDTA), and water. b) stirring the mixture by any stirring device for about 2 minutes. c) preparing a paste of the reagent bleaching powder (active chlorine 357.) by taking 9-107. by weight of bleaching powder and equal volume of waiter. d) addition of paste formed by step (c) to the mixture obtained by step (a) above. e) stirring the? emulsion obtained by steep (d) above thoroughly for about 2-5 minutes. The emulsion obtained by the process described above exhibits properties entirely different from the properties of individual constituents. The different constituents have synergic effect on each other, as will be evident from the following synergic features of the propose formulation. Firstly, the molecules of the surfactant, tetrachloroethylene and saturated fatty oil combine together to form a single independent large molecule of 200-5(30 which provides large surfact area for effective contact between the substrate and reagent leading to rapid decontamination against toxic chemicals. Secondly, none of the individual constituents has capability to dissolve both reagent as well as contaminant together to any significant extent whereas emulsion has the capability of dissolve both reagent as well as contaminant together. Thirdly, the emulsion has the property of stabilising the chlorine content of the bleaching powder for about 3 weeks whereas individually bleaching powder when kept on its own loses chlorine content in contact with moisture or water at. faster rate. -10-Fourthly calcium Hydroxide (Ca(OH)2, present in the commercially available bleaching power, is another reagent which decontaminates organophosphorous chemicals. As the emulsion has the capability to hold this reagent also and contaminant together, it brings both organo-phosphorus compounds and Ca(OH)2 of the bleaching powder, in close contact, enabling effective decontamination. Fifthly the emulsion based decontaminant has sticking and staying property whereas none of the individual constituent has such sticking property. The emulsion sticks to the horizontal as well s vertical painted metal or like surface. If forms a form which penetrates to the paint and detoxifies the toxic chemicals embedded in the paint without causing any damage to the paint/painted metal like surface returns to its original condition. From the above it is clear that, the decontaminant composition exhibits synergism over its ingredients. The composition is a synergistic composition and not a mere admixture and the ingredients of the composition is not involved any chemical reaction. The invention will now be illustrated by the following example which is not intended to be in any way as limitation on the scope of the invention. EXAMPLE 8-10 gm of surfactant namely sodium lauryl sulphate (SLS), 8-10 ml of tetrachloroethylene, 2ml of saturated fatty oil, 2ml of sequestring agent and 76-82ml of water are mixed together by stirring for about 2 minutes. Separately a paste is prepared by mixing 8-10 g of bleaching powder (active chlorine 357.) in 8—10 g of bleaching powder (active chlorine 355i) in 8-10 ml of water is prepared. This paste is added to mixture made earlier to obtain the emulsion. The resultant emulsion is then stirred thoroughly for about 2—5 minutes. WE CLAIM 1. A decontaminant composition comprising 6-12% by wt. of surfactant such as sodium lauryl sulphate, 5-12% by volume of oil such as tetrachloroethylene, 1-3% by volume of cosurfactant such as saturated fatty oil, 0.1-5% by vol. of sequestering agent such as ethylene-diamine tetracetate, 8-12% by wt. of bleaching agent such as bleaching powder and 8-10 % by volume of water. 2. A decontaminant composition as claimed in claim 1 wherein said oil is selected from tetrachloroethylene and perchloephylene, said co-surfactant is preferably mahua oil, said sequestering agent is selected from ethylene-diamine tetracetate and tripoly sodium phosphate. 3. A composition as claimed in claim 1, wherein preferably 8-10% by weight of surfactant, 7-10% by volume of tetrachloroethylene, 2% by wt. of saturated fatty oil preferably mahua oil, 1-2% by wt. of ethylene-diamine-tetra-acatate, 9-10% by weight of bleaching powder and 9-10% by volume of water is present. 4. A process for the preparation of a decontamination composition as claimed in claim 1 comprising of the step of: (a) preparing a mixture of surfactant, sequestering agent and water and stirring said mixture; (b) adding a paste of reagent such as bleaching powder to said mixture to form an emulsion and subjecting said emulsion to the step of stirring. 5. A process as claimed in claim 4 wherein 6-12% by wt. of surfactant is added to said mixture. 6. A process as claimed in claim 4, wherein 5-12% by volume of oil is added to said mixture. 7. A process as claimed in claim 4 wherein 1-3% by volume of cosurfactant is added to said mixture. 8. A process as claimed in claim 4 wherein 0.1-5% by vol. of sequestering agent is added to said mixture. 9. A process as claimed in claim 4, wherein 8-12% by wt. of bleaching powder is added to said mixture. 10. A process for the preparation of a decontaminant composition substantially as herein described and exemplified in the examples. 11. A decontaminant composition substantially as herein described and exemplified in the examples.

Documents:

2058-del-1996-abstract.pdf

2058-del-1996-claims.pdf

2058-del-1996-complete specification granted.pdf

2058-del-1996-correspondence-others.pdf

2058-del-1996-correspondence-po.pdf

2058-del-1996-description (complete).pdf

2058-del-1996-form-1.pdf

2058-del-1996-form-2.pdf

2058-del-1996-form-3.pdf

2058-del-1996-form-4.pdf

2058-del-1996-form-6.pdf

2058-del-1996-gpa.pdf