초록

Disclosed is a composition comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane. This invention also relates to cleaning solvent systems comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane and methods for cleaning various solid substrates.

대표청구항 ▼

What is claimed is: 1. A composition comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane, and a nitrile. 2. The composition of claim 1 wherein there is present about 5 to 95 wt. % n-propyl bromide and from about 95 to about 5 wt. % 1,1,3,3-pentafluorobutane. 3. The composition of clai

What is claimed is: 1. A composition comprised of n-propyl bromide and 1,1,1,3,3-pentafluorobutane, and a nitrile. 2. The composition of claim 1 wherein there is present about 5 to 95 wt. % n-propyl bromide and from about 95 to about 5 wt. % 1,1,3,3-pentafluorobutane. 3. The composition of claim 2 wherein there is present about 10 to 90 wt. % n-propyl bromide and from about 90 to 10 wt. % 1,1,1,3,3-pentafluorobutane. 4. The composition of claim 1 wherein there is also present and effective amount of one or more additives selected from the group consisting of acid accepters, metal passivators, stabilizing agents, and surface-active agents. 5. The composition of claim 4 wherein the acid acceptor is present and is an epoxide. 6. The composition of claim 5 wherein the epoxide is selected from the group consisting of butylene oxides, propylene oxide, epichlorohydrin, chclohexene oxide, pentene oxide, and cyclopentene oxide. 7. The composition of claim 6 wherein the metal passivator is selected from the group consisting of ethers and nitroalkanes. 8. The composition of claim 7 wherein the metal passivator is an ether selected from the group consisting of 1,2-dimethoxymethane, 1,4-dioxane, 1,3-dioxolane, diethyl ether, diisopropyl ether and trioxane. 9. The composition of claim 7 wherein the metal passivator is a nitroalkane selected from the group consisting of nitromethane, nitroethane, 1-nitropropane and 2-nitropropane. 10. The composition of claim 1 that also contains an effective amount of an additive selected from amines, and alcohols. 11. The composition of claim 10 wherein the additive is an amine selected from the group consisting of hexylamine, isohexylamine, octylamine, isooctylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, tripropylamine, triisopropylamine, and N,N-dimethylcyclohexylamine. 12. The composition of claim 1 wherein the nitrile is selected from the group consisting of acetonitrile, propionitrile, and butyronitrile. 13. The composition of claim 12 wherein the additive is an alcohol selected from the group consisting of n-propanol, isopropanol, n-butanol, isobutanol and tert.-butanol. 14. A method for cleaning an organic contaminant from the surface of a solid substrate, which method comprises contacting said solid substrate at effective conditions with an effective amount of a solvent mixture comprised of about 5 to 95 wt. % n-propyl bromide and from about 95 to 5 wt. % 1,1,1,3,3-pentafluorobutane, and a nitrile. 15. The method for cleaning of claim 14 which is selected from vapor degreasing, cold cleaning, hand wipes, aerosols and sprays. 16. The method of claim 14 wherein said mixture also contains an effective amount of one or more additives selected from the group consisting of acid accepters, metal passivators, stabilizing agents, and surface-active agents. 17. The method of claim 16 wherein an acid acceptor is present, which acid acceptor is an epoxide. 18. The method of claim 17 wherein the epoxide is selected from the group consisting of butylene oxides, propylene oxide, epichlorohydrin, chelohexene oxides pentene oxide, and cyclopentene oxide. 19. The method of claim 16 wherein the metal passivator is selected from the group consisting of ethers and nitroalkanes. 20. The method of claim 19 wherein the metal passivator is an ether selected from the group consisting of 1,2-dimethoxymethane, 1,4-dioxane, 1,3-dioxolane, diethyl ether, diisopropyl ether and trioxane. 21. The method of claim 19 wherein the metal passivator is a nitroalkane selected from the group consisting of nitromethane, nitroethane, 1-nitropropane and 2-nitropropane. 22. The method of claim 14 that also contains an effective amount of an additive selected from amines, and alcohols. 23. The method of claim 14 wherein the additive is an amine selected from the group consisting of hexylamine, isohexylamine, octylamine, isooctylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, tripropylamine, triisopropylamine, and N,N-dimethylcyclohexylamine. 24. The method of claim 14 wherein the nitrile is selected from the group consisting of acetonitrile, propionitrile, and butyronitrile. 25. The method of claim 22 wherein the additive is an alcohol selected from the group consisting of n-propanol, isopropanol, n-butanol, isobutanol and tert-butanol. 26. The method of claim 14 wherein the solid substrate is comprised of a material selected from the group consisting of one or more metals, glass, or polymeric material or a combination thereof. 27. The method of claim 26 wherein the solid substrate is photographic or movie film.