Abstract: A solid polymeric electrolytic membrane comprising a solution of an ion compound in a cross-linked polyether including a liquid plasticizer obtained by:a) copolymerizing a vinyl ether of the formula:R--(O--CH.sub.2 --CH.sub.2 --).sub.n --O--CH=CH.sub.2 (I)with an allyl vinyl ether of the formula:CH.sub.2 =CH--CH.sub.2 --(O--CH.sub.2 --CH.sub.2 --).sub.m --O--CH=CH.sub.

Abstract: A thermotropic polyesterimide, in which the liquid-crystalline phase is of nematic structure within a useful temperature range, consists of units of formula: ##STR1## the units being in the following ratios:a/(b+c)=1c/b=0-50/50, and preferably c/b<30/70The polyesterimide of the present invention possesses self-reinforcement characteristics, or reinforcement characteristics for traditional thermoplastic materials.

Abstract: The instant invention provides a solid, polymeric electrolyte in membrane form, constituted by a solid solution of an ionic compound in a crosslinked polyether, characterized in that said polymeric electrolyte is obtained by (1) blending a prepolymer, an ionic compound, a plasticizer, and a free-radical-generating activator; and (2) applying the resulting blend on an inert carrier and exposing said blend to a source of ultraviolet light, thermal radiation or electron beam, until the blend is completely crosslinked. The instant invention also provides an electrolyte separator for use in electrochemical devices, optical and electrochemical displays and sensors, which comprises the polymeric electrolyte of the instant invention.

Abstract: Process for preparing a solid, polymeric electrolyte, in membrane from, characterized in that:(1) a mixture is prepared, which contains:(a) a vinyl ether (I) of formulaR--(--O--CH.sub.2 --CH.sub.2 --).sub.n --O--CH.dbd.CH.sub.2wherein R=Me or Et and n is an integer comprised within the range of from 1 to 16;(b) a divinyl ether of formulaCH.sub.2 .dbd.CH--(--O--CH.sub.2 --CH.sub.2 --).sub.m --O--CH.dbd.CH.sub.2wherein m is integer comprised within the range of from 1 to 10, in a molar ratio to the vinyl ether (I) comprised within the range of from 2:98 to 60:40;(c) an ionic compound in an amount comprised within the range of from 1 to 30% by weight;(d) an oligomer or a dipolar aprotic liquid in an amount comprised within the range of from 0 to 80% by weight;(e) a photoinitiator in an amount comprised within the range of from 0 to 10% by weight;(2) the above mixture is applied onto an inert support and is exposed to a source of ultraviolet light, or to an electron beam.

Abstract: An electrochromic window comprises a tungsten oxide electrode on a transparent conductive glass sheet and a nickel oxide counterelectrode. The counterelectrode is activated by electrochemical intercalation of lithium on a transparent conductive glass sheet. The window also comprises a solid polymeric electrolyte interposed between the electrode and the counterelectrode. The electrolyte is formed by a solid solution of an ionic lithium compound in a solid crosslinked polyepoxide. The polyepoxide is obtained by copolymerization of a monoepoxide with a diepoxide.

Abstract: Water insoluble polymers containing hydrophilic pendant moieties ending with a chelating group are disclosed. The polymers are useful in the purification of water polluted by heavy metals such as mercury and lead. The polymers have the general formula P--(--(--O--R).sub.n --(NH--Q).sub.p --F).sub.m where P is a polymeric matrix capable of reacting with a polyalkylene glycol or an alkylene oxide having such a structure and molecular weight as to be insoluble in water; R is either --CH.sub.2 CH.sub.2 -- or mixtures of --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH(CH.sub.3)--, with the molar ratio of both units in the mixture being at least 3:1; n is 3 to 50; m is a numeral such that the % by weight of all of the --(--(--O--R--).sub.n (NH--Q).sub.p --F hydrophilic chains is higher than 1% by weight of the total weight of (I); Q is a C.sub.2 -C.sub.

Abstract: Compounds of general formula ##STR1## wherein: R is a linear or branched C.sub.1 -C.sub.20 alkyl radical, m is either 0 or 1; n has a value of from 1 to 10, are corrosion inhibitors, suitable for inhibiting the general corrosion and the stress brittlening caused by hydrogen sulfide (SSC), in an acidic environment, in the presence, or absence of carbon dioxide, of medium-and high-strength manganese steels and low-alloy steels, commonly used in petrochemical facilities and in bore drilling, transport and processing systems for natural gas or petroleum.

Abstract: A thermotropic copolyester, which displays a liquid-crystal phase of nematic type, within a desired temperature range, contains units deriving from:(a) a saturated, aliphatic dicarboxy acid;(b) 4,4'-dihydroxy-biphenyl and/or mono- or di-alkyl- or -alkenyl-derivatives thereof;(c) 4-hydroxy-benzoic acid and/or alkyl- or alkenyl-derivatives thereof.Such a copolyester improves the processability of unsaturation-containing elastomers and enhances the mechanical properties of subsequently vulcanized products.

Abstract: An improved process for preparing carboxylated 2-allyl-phenols of general formula (I): ##STR1## is disclosed, which consists of a first step of simultaneous esterification and etherification of a carboxylated phenol, subsequent rearrangement of the resulting product to yield allyl-carboxylated allyl-phenol and end saponification of the latter into carboxylated 2-allyl-phenol.

Abstract: A solid, polymeric electrolyte is prepared by:1) blending:(a) a macromer of formula (I) ##STR1## wherein R =methyl, ethyl, n is an integer comprised within the range of from 2 to 20, x is an integer comprised within the range of from 2 to 5;(b) a difunctional comonomer of formula (II) CH.sub.2 .dbd.C(CH.sub.3)COO(CH.sub.2 CH.sub.2 O).sub.m --CO--(CH.sub.3)C.dbd.CH.sub.2 wherein m is an integer comprised within the range of from 2 to 5; with a molar ratio of the macromer (I) to the difunctional comonomer (II) comprised within the range of from 98:2 to 60:40;(c) an ionic compound in an amount comprised within the range of from 1 to 30% by weight;(d) an oligomer or a dipolar aprotic liquid in an amount comprised within the range of from 0 to 80% by weight;(e) a photoinitiator in an amount comprised within the range of from 0 to 10% by weight; 2) applying the above mixture on an inert support and exposing it to a source of ultraviolet light, thermal radiations, or electron beam.

Abstract: A thermotropic copolyesteramide, with a nematic structure of the liquid crystalline phase within a desired temperature range of the mesophase, contains a unit derived from: (a) a saturated .alpha., .omega.-dicarboxylic acid; (b) 4,4'-dihydroxydiphenyl; (c) p-aminobenzoic acid; (d) 2,6-dihydroxyriaphthoic acid.A copolyesteramide of this type exhibits improved characteristics, especially in regard to its elastic modulus and tensile strength, when used as a self-reinforced material or as a reinforcement material for traditional thermoplastic polymers.

Abstract: A thermotropic copolyesteramide, with a nematic structure of the liquid crystalline phase within a desired temperature range of the mesophase, contains metered amounts of units derived from: (a) a saturated aliphatic -dicarboxylic acid; (b) 4,4'-dihydroxydiphenyl; (c) 4-hydroxybenzoic acid and (d) 4-aminobenzoic acid or (d') 4-aminophenol.This thermotropic copolyesteramide, produced by the copolymerization of monomers in the molten state, is a material with self-reinforcing characteristics capable of yielding, by normal injection or extrusion processes, remarkable molecular orientations which impart a high rigidity to the manufactured products.The copolyesteramide may be used as a reinforcement material for traditional thermoplastic polymers, by usual techniques.

Abstract: Semi-aromatic copolyamides and copolyester-amides are obtained by placing an aliphatic polyamide into contact with an aromatic hydroxyacid or aminoacid, by operating at high temperature, under melting conditions, possibly in the presence of a catalyst, with a ratio of the monomer units of aliphatic polyamide to the mols of aromatic hydroxyacid or aminoacid comprised within the range of from 20:1 to 1:1.The semiaromatic copolyamides and copolyester-amides so obtained can display a thermotropic liquid-crystal behavior as a function of their content of aromatic units linked inside the molecular chain. Their elastic modulus results to be improved relatively to the alifatic polyamides used as the starting product, and the elongation at break results to be decreased.Such semiaromatic polyamides and copolyester-amides can find application in the production of high-stiffness articles, by means of moulding or extrusion processes.

Abstract: A solid polymer electrolyte in membrane form, consisting of a solid solution of an ionic compound dissolved in a polyether, is obtained by copolymerizing a vinyl ether with an allyl vinyl ether to obtain a copolymer with allyl unsaturations; hydrosilylating the allyl double bond of this copolymer by reaction with an alkoxysilane to obtain a hydrosilylated copolymer; and cross-linking the hydrosilylated copolymer by means of a diprotic cross-linking agent, operating in solution in an organic solvent in the presence of an ionic compound, and evaporating the solvent to obtain a membrane.

Abstract: An amorphous modified poly(2,6-dimethyl-p-oxyphenylene) (PPO) is described with a glass transition temperature (Tg) within the range of 170.degree.-220.degree. C., of which the macromolecules contain units having trialkylsilyl groups bonded to the nucleus and/or to the methyl: ##STR1## together with units having hydroxyethyl groups bonded to the nucleus and/or to the methyl: ##STR2## This modified PPO is prepared by metalating PPO with a metalating agent and reacting the formed metalated PPO with a trialkylsilyl halide and with ehtylene oxide in succession.The use of the thus modified PPO for the preparation of flat, including asymmetric, membranes useful in gas mixture separation processes is described.

Abstract: A process for preparing a modified, amorphous poly-(2,6-dimethyl-p-oxyphenylene) (PPO) comprises:(a) metalating PPO with a metalating agent, and(b) functionalizing such a metalated PPO by reacting the PPO with a trialkylsilyl halide and/or ethylene oxide; and is characterized in that the reaction of metalation is carried out in an inert liquid vehicle which contains PPO in an at least partially suspended solid form, by operating under metalating conditions of gradually adding metalating agent to such a suspension, either continuously or as discrete portions. Depending on the functionalizing agents used, and on the sequence of addition thereof, the process makes it possible to obtain PPO polymers which are modified with trialkyl-silyl, hydroxyethylene and/or ethyleneoxytrialkyl-silyl functional groups. The modified PPO polymers are particularly suitable for preparing flat membranes, including asymmetrical membranes, for the separation of gas mixtures.

Abstract: A solid, polymeric electrolyte is constituted by a solid solution of an ionic compound in a polyepoxide, wherein said polyepoxide is the product of copolymerization of a monoepoxide of formula: ##STR1## wherein: R stands for methyl or ethyl radical; andn is an integer comprised within the range of from 2 to 10;with a diepoxide of formula: ##STR2## wherein: m is an integer comprised within the range of from 2 to 10;with a molar ratio of monoepoxide to diepoxide comprised within the range of from 99.9/0.1 to 90/10;with said polyepoxide furthermore having a weight average molecular weight equal to, or higher than, 1,000, and a glass transition temperature (Tg) of from -80.degree. to -60.degree. C.The solid, polymeric electrolyte can be converted into an electrochemical membrane useful in the manufacture of high-energy-density electrochemical generators, optical displays, electrochromic systems and sensors.

Abstract: New acrylamide copolymers formed by (meth)acrylamide benzene dicarboxylic monomer units in accordance with the following formula: ##STR1## wherein R is H or CH.sub.3 ; X is H or an alkaline metal or NH.sub.4 ; and wherein the COOX groups may be in ortho-, meta- or para- position in relation to each other, preferably being in ortho- position to each other; and of (meth)acrylamide monomer (II) units.

Abstract: New homopolymers formed by malonic (meth)acrylamide monomer units according to the following formula: ##STR1## wherein R is H or CH.sub.3 ; X is H or an alkaline metal or NH.sub.4.sup.+ ; and copolymers formed by (meth)acrylamide monomer units (I) and monomer units (II).

Abstract: A thermotropic copolyester, showing a liquid-crystalline structure of nematic type within a desired temperature range, contains umits deriving from:(a) a saturated bicarboxy aliphatic acid;(b) 4,4'-di-hydroxy-diphenyl,(c) 4-hydroxybenzoic acid; and(d) 4-hydroxy-benzoic acid bearing an alkyl substituent or a halogen atom bonded to the aromatic ring.Such a copolyester constitutes a material endowed with self-reinforcing characteristics, originating, through the usual transformation processes by injection or by extrusion techniques, marked molecular orientations, which supply the manufactured articles with high stiffness characteristics.Said material can be also used as a reinforcing agent when is mixed, by means of the usual techniques, with the traditional thermoplastic polymers.