Claims
- 1. A spray dispenser containing a composition devoid of nitroalkane and devoid of nitroaromatic hydrocarbon, said composition comprising (i) a solvent portion in which the solvent consists of n-propyl bromide of a purity of at least 99 wt % having dissolved therein a stabilizer system consisting essentially of (a) 1,3-dioxolane and (b) one or more epoxyalkanes having in the range of 3 to about 7 carbon atoms in the molecule, in proportions such that said composition is rendered more flame resistant when in the form of a spray dispersed in air under the conditions of ASTM test procedure D 3065 and when using 1,1,1,2-tetrafluoroethane as the propellant for said composition in said test procedure.
- 2. A spray dispenser of claim 1 wherein (a) is present in an amount in the range of about 0.1 to about 1 wt %, and (b) is present in an amount in the range of about 0.02 to about 0.5 wt %, both such percentages being based on the total weight of said n-propyl bromide plus the weights of (a) and (b).
- 3. A spray dispenser of claim 1 wherein (b) is 1,2-epoxybutane.
- 4. A spray dispenser of claim 1 wherein the weight ratio of (a):(b) is in the range of about 1:1 to about 5:1.
- 5. A spray dispenser of claim 1 wherein the concentration of (a) is in the range of about 0.2 to about 0.5 wt %, and the concentration of (b) is in the range of about 0.15 to about 0.25 wt %, said percentages being based on the total weight of the n-propyl bromide and of components (a) and (b).
- 6. A spray dispenser of claim 1 wherein said composition consists essentially of about 99.40 wt % of n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.20 wt % of 1,2-epoxybutane.
- 7. A spray dispenser of claim 1 wherein said composition consists essentially of about 99.45 wt % of n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.15 wt % of 1,2-epoxybutane.
- 8. A spray dispenser of any of claims 1 or 3-7 wherein the dispenser is a pressurized dispenser containing a propellant of low flammability.
- 9. A spray dispenser of claim 1 or 2 wherein said dispenser is a pressurized dispenser containing a propellant consisting of 1,1,1,2-tetrafluoroethane.
- 10. A spray dispenser of claim 1 wherein said dispenser is a pressurized dispenser containing as the propellant one or a mixture of propellants selected from fluorocarbons, fluorohalocarbons, fluorohydrocarbons, and fluorohalohydrocarbons.
- 11. A spray dispenser of claim 1 or 2 wherein said dispenser is a pressurized dispenser containing as the propellant, a propellant selected from the group consisting of bromochlorodifluoromethane, 1,1,1-trifluoroethane, dichiorof luoromethane, 4 brodichlorodifluoromethane, chlorotrifluoromethane, trichlorof luoromethane, sym-tetrachlorodifluoroethane, 1,2,2-trichloro-1,1,2-trifluoroethane, and sym-dichlorotetrafluoroethane, and mixtures thereof.
- 12. A method of cleaning a surface, which method comprises applying to said surface as an aerosol spray, a composition devoid of nitroalkane and devoid of nitroaromatic hydrocarbon, said composition comprising (i) a solvent portion in which the solvent consists of n-propyl bromide of a purity of at least 99 wt % having dissolved therein (ii) a stabilizer system consisting essentially of (a) 1,3 dioxolane and (b) one or more epoxyalkanes having in the range of 3 to about 7 carbon atoms in the molecule, in proportions such that said composition is rendered more flame resistant when in the form of a spray dispersed in air under the conditions of ASTM test procedure D 3065 and when using 1,1,1,2-tetrafluoroethane as the propellant for said composition in said test procedure.
- 13. A method of claim 12 wherein said composition is applied as the aerosol spray discharge from an aerosol dispenser in which 1,1,1,2-tetrafluoroethane is the propellant, and wherein the wt % ratio of 1,1,1,2-tetrafluoroethane to the sum of the n-propyl bromide, the ether, and the epoxyalkane is about 30/70 or higher.
- 14. A method of claim 2 wherein said composition is applied as the aerosol spray discharge from an aerosol dispenser in which one or a mixture of propellants of low flammability selected from fluorocarbons, fluorohalocarbons, fluorohydrocarbons, and fluorohalohydrocarbons is the propellant.
- 15. A method of claim 14 wherein said propellant is selected from bromochlorodifluoromethane, 1,1,1-trifluoroethane, dichlorof luoromethane, dichlorodifluoromethane, chlorotrifluoromethane, trichlorof luoromethane, sym-tetrachlorodifluoroethane, 1,2,2-trichloro-1,1,2-trifluoroethane, and sym-dichlorotetrafluoroethane, and mixtures thereof.
- 16. A method of claim 12 wherein said composition is devoid of any additive component other than (a), (b), and if used, a propellant.
- 17. A method of claim 12 wherein the amount of (a) in said composition is in the range of about 0.2 to about 0.5 wt %, and the amount of (b) is in the range of about 0.15 to about 0.25 wt %, said percentages being based on the total weight of the n-propyl bromide and of components (a) and (b).
- 18. A method of claim 12 wherein said composition consists essentially of about 99.40 wt % of said n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.20 wt % of 1,2-epoxybutane.
- 19. A method of claim 12 wherein said composition consists essentially of about 99.45 wt % of said n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.15 wt % of 1,2-epoxybutane.
- 20. A method of reducing the flammability of n-propyl bromide when used in an aerosol application, which method comprises blending with n-propyl bromide of a purity of at least 99 wt %, an additive system consisting of (a) in the range of about 0.1 to about 1 wt % of 1,3-dioxolane and (b) in the range of about 0.02 to about 0.5 wt % of one or more epoxyalkanes having in the range of 3 to about 7 carbon atoms in the molecule, wherein said n-propyl bromide, the 1,3-dioxolane and the epoxyalkane are present in proportions such that the resultant composition is more flame resistant when in the form of a spray dispersed in air, and wherein the flammability is measured under the conditions of ASTM test procedure D 3065 in which 1,1,1,2-tetrafluoroethane is employed as the propellant for said composition in the test procedure.
- 21. A method of claim 20 wherein the weight ratio of (a):(b) is in the range of about 1:1 to about 5:1.
- 22. A method of claim 20 wherein the amount of (a) in said composition is in the range of about 0.2 to about 0.5 wt %, and the amount of (b) is in the range of about 0.15 to about 0.25 wt %, said percentages being based on the total weight of the n-propyl bromide and of components (a) and (b).
- 23. A method of claim 20 wherein said composition consists essentially of about 99.40 wt % of said n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.20 wt % of 1,2-epoxybutane.
- 24. A method of claim 20 wherein said composition consists essentially of about 99.45 wt % of said n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.15 wt % of 1,2-epoxybutane.
- 25. A composition devoid of nitroalkanes and devoid of nitroaromatic hydrocarbons, said composition consisting essentially of about 98.75 to about 99.75 wt % of n-propyl bromide, about 0.10 to about 1.00 wt % of 1,3-dioxolane, and about 0.15 to about 0.25 wt % of 1,2-epoxybutane, the total of said weight percentages being 100 wt %.
- 26. A composition of claim 25 wherein said composition consists essentially of about 99.40 to about 99.45 wt % of n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.15 to about 0.20 wt % of 1,2-epoxybutane, the total of said weight percentages being 100 wt %.
- 27. A composition of claim 26 wherein said composition consists essentially of about 99.40% of n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.20 wt % of 1,2-epoxybutane.
- 28. A composition of claim 26 wherein said composition consists essentially of about 99.45% of n-propyl bromide, about 0.40 wt % of 1,3-dioxolane, and about 0.15 wt % of 1,2-epoxybutane.
REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation of commonly owned copending Continued Prosecution Application (CPA) No. 09/151,822, which continues the prosecution of prior commonly-owned copending Application No. 09/151,822, filed Sep. 11, 1998.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09151822 |
Sep 1998 |
US |
Child |
09792559 |
Feb 2001 |
US |