Abstract: The transducer (1) comprises: a rigid casing (2–4) in which a membrane (5) is clamped which, together with a portion of the casing (2–4), defines at least one chamber (6, 7) of variable volume; at least one winding (14); an interaction element (13), able to interact magnetically with the winding (14) under the effect of a displacement of the membrane (5), in such a way that the inductance of the winding (14) is variable in dependence on the relative position of the interaction element with respect to the winding (14), and circuit devices (17) connected to the winding (14) and operable to supply electrical signals of which one parameter, frequency for example, is variable in dependence on the inductance of the winding (14); the said circuit devices (17) including a memory (22) operable to store data representative of corrective values which, when applied in operation to the effective instantaneous values of the said parameter, make it possible to obtain correct values of the parameter corresponding to a predet

Abstract: The transducer (1) comprises: a rigid casing (2-4) in which a membrane (5) is clamped which, together with a portion of the casing (2-4), defines at least one chamber (6, 7) of variable volume; at least one winding (14); an interaction element (13), able to interact magnetically with the winding (14) under the effect of a displacement of the membrane (5), in such a way that the inductance of the winding (14) is variable in dependence on the relative position of the interaction element with respect to the winding (14), and circuit devices (17) connected to the winding (14) and operable to supply electrical signals of which one parameter, frequency for example, is variable in dependence on the inductance of the winding (14); the said circuit devices (17) including a memory (22) operable to store data representative of corrective values which, when applied in operation to the effective instantaneous values of the said parameter, make it possible to obtain correct values of the parameter corresponding to a predet

Abstract: Disclosed are aqueous dispersions of cationic urethane-acrylic copolymers containing fluorinated acrylic monomers characterized in that the dispersions are obtained by radical polymerization in aqueous dispersion of fluorinated and non-fluorinated acrylic monomers (A) and of vinyl terminated polyurethane-acrylates containing cationic groups (B). The present invention relates to aqueous dispersions of urethane-acrylic copolymers containing fluorinated acrylic monomers and to their use as finishing agents in oleo and water repellent treatment in the textile, leather and paper field and to a procedure for the preparation of the aqueous dispersions of polymers.

Abstract: A block copolymer composition is disclosed which derives from the copolymerization of a monoalkenyl-arene and a conjugated diene having from 4 to 5 carbon atoms, and comprising:from 30% to 55% by weight, preferably from 34% to 50%, of non-coupled linear structures;from 25% to 40% by weight, preferably from 30% to 35% by weight, of coupled linear structures;from 20% to 40% by weight, preferably from 24% to 35% by weight, of branched structures.The preparation of said composition and its use in the formulation of adhesive tapes and labels are disclosed as well.

Abstract: Pressure-sensitive "hot melt" adhesive compositions based on styrene-butadiene radial block copolymers, styrene-isoprene linear and/or radial block copolymers and plasticizing oils, are characterized in that they maintain low tack values (peeling, quick Stick) although having a good balance of properties normally required.

Abstract: A reactive hot melt composition comprises the products of the reaction between (A) an aliphatic or aromatic diisocyanate and (B) a mixture containing: (1) a crystalline polycarbonate diol, (2) an elastomeric polycarbonate diol or an elastomeric polycarbonate copolyester diol, and possibly (3) a vitreous polycarbonate diol or a vitreous polycarbonate copolyester diol. The process for preparing the reactive hot melt composition is also described .