Abstract: The invention concerns the cosmetic use of polyguanidines or of their physiologically acceptable salts for or in a composition for the protection and/or care of keratinous fibres, as well as cosmetic compositions containing polyguanidines. The invention also concerns a novel family of polyguanidines.

Abstract: Process for fabricating electronic components, of the variable capacitor or microswitch type, comprising a fixed plate (1) and a deformable membrane (20) which are located opposite each other, which comprises the following steps, consisting in:

Abstract: Process for fabricating electronic components, of the variable capacitor or microswitch type, comprising a fixed plate (1) and a deformable membrane (20) which are located opposite each other, which comprises the following steps, consisting in: depositing a first metal layer on an oxide layer (2), said first metal layer being intended to form the fixed plate; depositing a metal ribbon (10, 11) on at least part of the periphery and on each side of the fixed plate (1), said ribbon being intended to serve as a spacer between the fixed plate (1) and the deformable membrane (20); depositing a sacrificial resin layer (15) over at least the area of said fixed plate (1); generating, by lithography, a plurality of wells in the surface of said sacrificial resin layer; depositing, by electrolysis, inside the wells formed in the sacrificial resin (15), at least one metal region intended to form the deformable membrane (20), this metal region extending between sections of the metal ribbon (10, 11) which are located o

Abstract: Process for fabricating electronic components, of the variable capacitor or microswitch type, comprising a fixed plate (1) and a deformable membrane (20) which are located opposite each other, which comprises the following steps, consisting in:

Abstract: Hydroxypropyl quaternary ammonium compounds containing an ester function, in particular containing a fatty acid ester function, of formula (I): in which R denotes a branched C7-C35 alkyl chain; R1, R2 and R3 independently denote a C1-C18 alkyl chain; X− denotes a halide or another anion chosen from: in which R4 and R5 independently denote a C1-C8 alkyl chain are disclosed. Cosmetic or dermatological compositions containing these compounds, in particular haircare products in which the quaternary compounds are used as treatment agents for improving the surface condition of the hair as well as for protecting the hair under the action of atmospheric agents or mechanical or chemical treatments are disclosed.

Abstract: A process for the preparation of hydroxypropylated quaternary ammonium compounds containing an ester functional group, preferably a fatty acid ester functional group, of formula (I): ##STR1## in which: R denotes a saturated or unsaturated, linear or branched C.sub.7 -C.sub.35 alkyl chain;R.sub.1, R.sub.2 and R.sub.3 independently denote a saturated or unsaturated, linear or branched C.sub.1 -C.sub.18 alkyl chain;X.sup.- denotes a halide or another anion chosen from: ##STR2## in which: R.sub.4 and R.sub.5 independently denote a saturated or unsaturated, linear or branched C.sub.1 -C.sub.8 alkyl chain, wherein the process comprises reacting, in a single step and in an alcoholic solvent at reflux, an aliphatic carboxylic acid (RCOOH) salt or an aliphatic carboxylic acid under basic catalysis conditions with a compound of formula (II): ##STR3## in which R.sub.1, R.sub.2, R.sub.3 and X.sup.- are defined as above.