The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1994
Filed:
Jul. 07, 1993
Applicant:
Inventors:
Daniel Desbiendras, Villetaneuse, FR;
Pascal Michaud, Saint-Gratien, FR;
Assignee:
Elf Atochem S.A., Puteaux, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ; C23G / ; B08B / ;
U.S. Cl.
CPC ...
252172 ; 134 12 ; 134 31 ; 134 40 ; 134 42 ; 252153 ; 252162 ; 252194 ; 252364 ; 252D / ;
Abstract
To replace cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention provides a composition comprising, by weight, 30 to 70% 1,1,1,3,3-pentafluorobutane (F365-mfc) and 70 to 30% methylene chloride. These two compounds form a positive azeotrope (B.p.=33.6.degree. C. at normal pressure). The composition, optionally stabilized, can be used for the cleaning and/or the drying of solid surfaces, in particular for removing flux from printed circuits and for degreasing mechanical components.