Abstract:
A drying composition according to the invention is composed of a solution of a surface-active agent in a mixture of a fluorinated hydrocarbon and of a polyfluorinated alcohol of formula: Rf—(CH2)n—OH (I) in which n is equal to 1 or 2 and Rf represents a linear perfluoroalkyl radical containing from 2 to 8 carbon atoms.
Abstract:
To replace compositions based on CFCs or CFHCs in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or quasi-azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 1,1,1,3,3-pentafluorobutane and, optionally, methanol.
Abstract:
In order to replace compositions based on CFC or on HCFC in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or virtually azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, methylene chloride and optionally methanol.
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 69% 1,1,1,3,3-pentafluorobutane (F365-mfc), 30 to 60% methylene chloride and 1 to 10% methanol. These three compounds form a positive azeotrope (B.p.=32.1.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.
Abstract:
The device comprises at least one pair of flexible ballasts which extend laterally along the length of the inflatable structure and each comprise an orifice, acting as a vent, situated at the front, and a scoop system situated at the rear. Between the ballasts, at least one pipe connects the cavities of said ballasts to equalize their level of fill and the stagnation pressure of the water obtaining in said cavities when the inflatable structure is pulled along in the inflated state. This scoop system consists of a component moulded in a rigid or semirigid thermoplastic or is made of an assembly of cutouts from a flexible material of watertight fabric. This scoop system is bonded and/or welded to the ballast.
Abstract:
The rescue device for the passengers and crew of a ship includes: a container that contains survival equipment; a system that is intended for stowing said container relative to the deck of the ship and contains at least one strap and a system for multimodally attaching and releasing said container; an airbag-type inflatable balloon set up between a structure, secured to the deck, and said container, said structure defining a passage for the passengers when needed; and a means for releasing the airbag set up on the wheelhouse of said ship. The frame-shaped structure is formed of: two side posts; a lower cradle, on which said container rests; an upper crosspiece; and a plate set up inside the ship and acting as a counterbearing for the airbag when said container is ejected.
Abstract:
To replace compositions based on CFCs or CFHCs in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or quasi-azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 1,1,1,3,3-pentafluorobutane and, optionally, methanol.
Abstract:
Life raft (1) launched by davit (7) and comprising for this purpose hanging means (4, 5) able to be held in a hook (6) suspended from the davit (7), this raft (1) being fitted out with equipment comprising at least one load (102) that is heavy or heavier than the others, which raft is characterized in that the heavy or heavier load (102) is attached to the aforesaid raft hanging means (4, 5), as a result of which, when the raft is hoisted by the davit, the heavy load or at least the heaviest load remains suspended from the raft hanging means without touching the raft, and the raft, being much better balanced, occupies a more horizontal position.
Abstract:
A drying composition according to the invention is composed of a solution of a surface-active agent in a mixture of a fluorinated hydrocarbon and of a polyfluorinated alcohol of formula: Rf-(CH2)nnullOHnullnull(I) in which n is equal to 1 or 2 and Rf represents a linear perfluoroalkyl radical containing from 2 to 8 carbon atoms.
Abstract:
A composition for cleaning solid surfaces, under cold conditions, in non-aqueous medium consists essentially of a mixture of alkanes or cycloalkanes and at least one organic compound comprising at least one ketone function, the composition having a flashpoint above or equal to 40.degree. C. and below 55.degree. C., measured according to ASTM standard D56-70.