Solvent mixture for use in a vapor degreaser and method of cleaning an article in a vapor degreaser utilizing said solvent
Patent 6402857 Issued on June 11, 2002. Estimated Expiration Date: November 29, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
134/31, Gas or vapor condensation or absorption oowork134/11, Gas or vapor form agent condensed or absorbed on work134/12, By distilling, or liquefying vapors of, used agent134/19, Including work heating or contact with combustion products134/30, Including steam, gaseous agent or temperature feature134/38, Paints, varnishes, lacquers, or enamels, removal134/40, Oils, grease, tar, or wax removal, by dissolving510/175, For printed or integrated electrical circuit, or semiconductor device510/255, With corrosion inhibiting or solvent stabilizing component510/256, With halogenated hydrocarbon, abrasive, coating, or polishing component510/264, Organic nitrogen containing substituent in the component510/266, Plural inhibitor or stabilizer components510/273, Halogenated hydrocarbon component (e.g., degreasing composition, etc.)510/364, For displacing organic liquid film from a solid surface510/365, For removing greasy or oily contaminant from a substrate510/412, Halogenated hydrocarbon component510/461Specific organic component (e.g., triazines, etc.)
The invention provides a solvent mixture including n-propyl bromide, a mixture of low boiling solvents and, preferably, a defluxing and/or ionics removing additive and/or at least one saturated terpene. The invention also provides a method of cleaning an article (e.g., an electrical, plastic, or metal part) in a vapor degreaser using the solvent mixture. The solvent mixture of the invention is non-flammable, non-corrosive, and non-hazardous. In addition, it has a high solvency and a very low ozone depletion potential. Thus, using the solvent mixture of the invention, oil, grease, rosin flux, and other organic material can be readily removed from the article of interest in an environmentally safe manner.
Other References
Kirk-Other, Enclyopedia of Chemical Technology, 4th ed., John Wiley and Sons, pp. 569, 570, 574, 575 (Month of publication is unknown)
Written Opinion in International Application No. PCT/US97/05183, dated Jan. 27, 199