Abstract: The invention relates to a control system for an aircraft propeller drive for controlling the power of a diesel engine (2) by means of an accelerator (7) and a control module (8), and for controlling the speed of the aircraft propeller (4) which can be controlled by a propeller blade control valve (6) and which is connected to the diesel engine (2) by means of a drive train (3). The control module comprises a totally digital power unit regulator (8) integrating a closed control circuit which is connected to the accelerator for controlling the power and to the propeller blade control valve for controlling the speed of the propeller. The control circuit compares the desired value based on the position of the accelerator and the measured actual value of the engine speed and controls the propeller blade control valve (6) based on the determined differential speed, and automatically adapts the propeller speed to the engine power predetermined by the position of the accelerator.

Abstract: A fluorohydrocarbon compound of formula RF—C2H4—O—CO—RH, in which RF is a perfluorinated alkyl group and RH is an alkyl group, in and/or for the preparation of a stable emulsion containing at least one fatty phase and one aqueous phase. The invention also relates to the use of the same compound as a stabilizing agent for an emulsion containing at least one fatty phase and one aqueous phase. Another subject of the invention is the use of such a compound as an essential component of the fatty phase of an emulsion and emulsions containing such a fatty phase. Another subject of the invention is a composition comprising such an emulsion.

Abstract: A fluorohydrocarbon compound of formula RF—C2H4—O—CO—RH, in which RF is a perfluorinated alkyl group and RH is an alkyl group, in and/or for the preparation of a stable emulsion containing at least one fatty phase and one aqueous phase. The invention also relates to the use of the same compound as a stabilizing agent for an emulsion containing at least one fatty phase and one aqueous phase. Another subject of the invention is the use of such a compound as an essential component of the fatty phase of an emulsion and emulsions containing such a fatty phase. Another subject of the invention is a composition comprising such an emulsion.

Abstract: The present invention concerns hydrofluorocarbon compound with formula (I):R.sub.F --(CH.sub.2).sub.n --X--[C.sub.3 H.sub.5 (OH)]--(Y).sub.x --R.sub.H(I)whereC.sub.3 H.sub.5 (OH) represents the structures: ##STR1## R.sub.F represents a perfluorinated, linear or branched C.sub.4 -C.sub.20 alkyl radical or a mixture of perfluorinated, linear or branched C.sub.4 -C.sub.20 alkyl radicals;R.sub.H represents a linear or branched C.sub.23 -C.sub.36 alkyl radical or a mixture of linear or branched C.sub.23 -C.sub.36 alkyl radicals; ##STR2## It also concerns their use in cosmetic compositions and cosmetic compositions containing these compounds.

Abstract: The invention relates to the use, in cosmetic compositions for cleansing and/or removing make-up in particular from the skin, mucous membranes, eyes, and/or the hair, of at least one succinic anhydride derivative corresponding to one of the formulae I and II:GOOC--(HR)C--C(HR')--COO--(C.sub.m H.sub.2m O).sub.n --H (I)GOOC--(HR)C--C(HR')--COO--(C.sub.m H.sub.2m O).sub.n --C.sub.p H.sub.2p --O--CO--(HR')C--C(HR)--COOG (II).

Abstract: New compounds of formula (I): ##STR1## in which: R.sub.1 represents a C.sub.4 -C.sub.18 alkyl or alkylene radical, R.sub.2 represents a C.sub.2 -C.sub.16 alkyl or alkylene radical, R.sub.3 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical, and A represents a non-ionic hydrophilic group, as well as a cosmetic composition containing these compounds and the use of such a cosmetic composition in hair treatment.

Abstract: The use of alkyl N-(hydroxyalkyl)carbamates in a cosmetic or pharmaceutical composition provided in the form of an aqueous lotion, a gel, an emulsion, a cream, a foam or a paste.

Abstract: Fluorinated hydrocarbon compounds have formula (I):R.sub.F --(CH.sub.2).sub.n --X--?C.sub.3 H.sub.5 (OH)!--(Y).sub.x --R.sub.H ,in which C.sub.3 H.sub.5 (OH) represents structures (Ia) or (Ib): ##STR1## R.sub.F is a perfluorinated C.sub.4 -C.sub.20 alkyl radical or a mixture of perfluorinated C.sub.4 -C.sub.20 radicals; R.sub.H is a straight or branched C.sub.1 -C.sub.22 alkyl radical or a mixture of straight or branched C.sub.1 -C.sub.22 alkyl radicals or an aryl or aralkyl radical; n is from 0 to 4; X stands for O, S, ##STR2## x stands for 0 or 1; Y stands for O, S, (a) or (b); with the proviso that when X.dbd.S, (a) or (b), Y is not S, (a) or (b). The use of said compounds as amphiphilic compounds, the method of preparing them, and the cosmetic compositions containing them are also disclosed.

Abstract: New compounds of formula (I): ##STR1## in which: R.sub.1 represents a C.sub.4 -C.sub.18 alkyl or alkylene radical, R.sub.2 represents a C.sub.2 -C.sub.16 alkyl or alkylene radical, R.sub.3 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical, and A represents a non-ionic hydrophilic group, as well as a cosmetic composition containing these compounds and the use of such a cosmetic composition in hair treatment.

Abstract: The invention relates to new hydrocarbon compounds containing a fluorinated chain of formula I ##STR1## and to their process of preparation. The invention also relates to the use of these new compounds as thickening agents, in particular for non-aqueous media, such as cosmetic compositions, and to the cosmetic compositions containing them.

Abstract: The present invention concerns the use in a cosmetic composition of a hydrofluorocarbon compound with formula (I):R.sub.F --(CH.sub.2).sub.n --X--?C.sub.3 H.sub.5 (OH)!--Y--R.sub.H(I)whereC.sub.3 H.sub.5 (OH) represents the structures: ##STR1## R.sub.F represents a perfluorinated C.sub.4 -C.sub.20 alkyl radical or a mixture of perfluorinated C.sub.4 -C.sub.20 alkyl radicals;R.sub.H represents a linear or branched C.sub.1 -C.sub.22 alkyl radical or a mixture of linear or branched C.sub.1 -C.sub.22 alkyl radicals, an aryl radical or an aralkyl radical;n is between 0 and 4;X and Y represent ##STR2## It also concerns certain sulfoxide and sulfone compounds and cosmetic compositions including the compounds of the invention.

Abstract: The present invention concerns the use of hydrofluorocarbon compounds with formula (I):R.sub.F -(CH.sub.2).sub.n -X-?C.sub.3 H.sub.5 (OH)!-Y-(CH.sub.2).sub.m -R'.sub.F (I')whereC.sub.3 H.sub.5 (OH) represents the structures: ##STR1## R.sub.F and R.sub.F', which may be identical or different, represent a perfluorinated linear or branched C.sub.4 -C.sub.20 alkyl radical or a mixture of perfluorinated linear or branched C.sub.4 -C.sub.20 alkyl radicals;m and n, which may be identical or different, are 0, 1, 2, 3 or 4;X and Y, which may be identical or different, represent O or S. It also concerns certain of these compounds and cosmetic compositions containing these compounds.

Abstract: The invention relates to compounds of formula: ##STR1## in which: w is 0, 1 or 2;x is between 2 and 10;y is between 0 and 5;R denotes a methyl, ethyl, hydroxyethyl or benzyl radical;X.sup..crclbar. denotes an inorganic or organic anion; andn is an integer or decimal number between 1 and 15;the [C.sub.5 H.sub.6 N.sub.2 R.sup.+ ] group representing the following structures, taken as a mixture or individually: ##STR2## as well as their use as a biocidal agent or preservative.

Abstract: Fluorine-containing, polyglycerolated amphiphilic sulphur compounds, cosmetic or pharmaceutical composition containing them, preparation process and vesicles formed. The present invention relates to compound of formula (I)R.sub.f --(CH.sub.2 .paren close-st..sub.m --S--G.sub.n --H(1)in which:R.sub.f denotes a linear or branched C.sub.6 to C.sub.20 perfluoroalkyl radical or a mixture of linear or branched C.sub.4 to C.sub.20 perfluoroalkyl radicals;m represents 0, 1 or 2;n represents a statistical value or integer between 2 and 10; ##STR1## it being possible for each of the oxygen atoms to be linked to a hydrogen atom or to another unit G, to their use as surfactants and also to cosmetic or pharmaceutical compositions and vesicles containing them, and to a process for preparing them.

Abstract: The invention relates to a cosmetic or pharmaceutical composition comprising as hydrating agent a compound of the alkyl N-(hydroxyalkyl)carbamate family.

Abstract: The present invention relates to compounds of formula (I) ##STR1## in which: R.sub.f denotes a linear or branched C.sub.6 to C.sub.20 perfluoroalkyl radical or a mixture of linear or branched C.sub.4 to C.sub.20 perfluoroalkyl radicals;m represents 0, 1 or 2;n represents a statistical value or integer between 2 and 10;G represents a unit chosen from: ##STR2## it being possible for each of the oxygen atoms to be linked to a hydrogen atom or to another unit G, to their use as surfactants and also to cosmetic or pharmaceutical compositions and vesicles containing them, and to a process for preparing them.

Abstract: The invention relates to compounds of formula: ##STR1## in which: w is 0, 1 or 2;x is between 2 and 10;y is between 0 and 5;R denotes a methyl, ethyl, hydroxyethyl or benzyl radical;X.crclbar. denotes an inorganic or organic anion; andn is an integer or decimal number between 1 and 15;the [C.sub.5 H.sub.6 N.sub.2 R.sup.+ ] group representing the following structures, taken as a mixture or individually: ##STR2## as well as their use as a biocidal agent or preservative.

Abstract: The invention relates to polyfluoroalkyl nitrogen compounds of general formula:R.sub.F --(CH.sub.2).sub.2 --Xin which X denotes an isothiocynate --N.dbd.C.dbd.S, carbodiimide --N.dbd.C.dbd.N(CH.sub.2).sub.2 --R'.sub.F or thiourea --NH--CS--A group, A denoting an optionally substituted amino group, and each of the symbols R.sub.F and R'.sub.F denotes a perfluoroalkyl radical.These compounds, prepared from the corresponding azides R.sub.F (CH.sub.2).sub.2 N.sub.3 or amines R.sub.F (CH.sub.2).sub.2 NH.sub.2, can be used as surface-active agents or precursors of such agents.

Abstract: The invention relates to polyfluoroaklyl nitrogen compounds of general formula:R.sub.F --(CH.sub.2).sub.2 --Xin which X denotes an isothiocyanate --N.dbd.C.dbd.S, carbodiimide --N.dbd.C.dbd.N(CH.sub.2).sub.2 --R'.sub.F or thiourea --NH--CS--A group, A denoting an optionally substituted amino group, and each of the symbols R.sub.F and R'.sub.F denotes a perfluoroalkyl radical.these compounds, prepared from the corresponding axides R.sub.F (CH.sub.2).sub.2 N.sub.3 or amines R.sub.F(CH.sub.2).sub.2 NH.sub.2, can be used as surface-active agents or precursors of such agents.