Abstract: A continuous process is provided for the preparation of a maleamic acid of the formula: ##STR1## in which: R represents a linear or branched alkylene, arylene, aralkylene, alkylarylene or cycloalkylene radical or a divalent heterocyclic radical, the free valencies of which are attached to carbon atoms, the radical containing 2 to 20 carbon atoms and X represents either a hydrogen atom or the radical: ##STR2## which comprises passing a solution of a primary monoamine or diamine and a solution of maleic anhydride in amounts such that there is a 5 to 20 mol % excess of anhydride, at a temperature of from 40.degree. to 130.degree. C and at a rate greater than 7 m/second through an injection nozzle into a twin screw reactor, the solvent for the primary amine being the same as, or compatible with, the solvent for the maleic anhydride. This process eliminates clogging problems.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins comprise three-dimensional recurring units of the general formula: ##STR1## in which, in any particular recurring unit: A IS ZERO OR AN INTEGER FROM 1 TO 5; ##STR2## denotes a radical of the general formula ##STR3## p1 in which Y represents H, CH.sub.3 or Cl; G denotes a monovalent aromatic radical; andA denotes a divalent organic radical possessing at least two carbon atoms,Such that there are on average, at least 4.4 and at most about ##STR4## radicals per ##STR5## radical, and optionally, units and/or molecules of the general formula ##STR6## IN WHICH: T denotes a monovalent organic radical;T.sub.1 denotes a radical of the general formula: ##STR7## or a radical of the general formula: ##STR8## b is zero or an integer from 1 to 4; AND A, D.sub.

Abstract: Compositions are provided which consist of a solid suspension of:a. a prepolymer obtained by reacting a N,N'-bis-imide of an unsaturated dicarboxylic acid of general formula: ##STR1## in which D represents a divalent organic radical containing a carbon-carbon double bond and A represents a divalent organic radical possessing from 2 to 30 carbon atoms, and a polyamine of general formula:R (NH.sub.2).sub.xin which x represents an integer at least equal to 2 and R represents an organic radial of valency x, the bis-imide being used in an amount from 0.55 to 25 mols per mol of --NH.sub.2 group introduced by the polyamine, suspended in:B. water, and optionally,C. a polar water-miscible organic solvent having a boiling point between 110.degree. C and 270.degree. C in an amount up to 50% by weight of the liquid phase. These compositions are thixotropic and useful for coating and impregnating fibrous materials and the like from which valuable resinous composites can be obtained.

Abstract: A flexible heating tube especially for medical use, e.g. for taking blood away from and returning it to the body, in which a flexible pipe of transparent plastics material is provided with at least one electrical helical resistance heating conductor and at least one helical filiform temperature measuring resistance probe. The two elements are wound on the same axis and are embedded in the wall of the pipe and are in surrounding relation to the bore in the pipe. The helical turns of the at least one electrical resistance conductor and of the at least one temperature measuring probe are of the same pitch and are coextensive along the length of the pipe. Electrical connection terminals at at least one end of said pipe are connected to said at least one heating conductor and said at least one temperature measuring probe.

Abstract: Carotene compounds e.g. .beta.-carotene, are prepared by reacting a sulphone Ret--SO.sub.2 --R, in which Ret represents retinyl or substituted retinyl and R represents a hydrocarbon radical, in the presence of an alkaline reagent with an ester Ret-X, in which X represents an acid residue, and then desulphonating the product, for example with an alkaline reagent.

Abstract: Compounds of the formula: ##STR1## wherein one of the symbols =X- represents =N- and the other three each represent a group ##STR2## in which Y represents hydrogen, halogen, alkyl, alkoxy, cyano or nitro, =A- and =A.sub.1 - represent a group =CH- or =N-, =A.sub.1 - representing a group =CH- or =N- when =A- represents =CH- and =A.sub.1 - representing =N- when A represents =N-, Z represents hydrogen, halogen, alkyl, alkoxy or nitro, m represents zero or an integer from 1 to 4, and (i) n represents zero and R represents hydrogen, alkyl, alkenyl, alkynyl, hydroxyalkyl or phenyl, or (ii) n represents 1 and R represents alkyl, hydroxyalkyl or phenyl, are new compounds possessing pharmacological properties; they are particularly active as tranquilizers and anticonvulsant agents.

Abstract: A unit cell for fluid fractionating apparatus, fractionating apparatus including such cells and methods of making the cells in which a plurality of hollow fibers are arranged linearly in at least one groove formed in a core, the groove or grooves supporting all or part of the hollow fibers and acting as a bed for said fibers, two end walls of hardened glue securing the hollow fibers to one another and at their ends these walls being firmly secured to the core. The core may be for example of channel shaped, H-shaped, cross-shaped or star-shaped cross-section, and the cell may be enclosed in a jacket having at least one fluid inlet and at least one fluid outlet passage. The construction of the cells makes for easy manufacture by winding the fibers or bundling the fibers and placing them in the grooves of the core and securing them in place by the hardened glue end walls.

Abstract: A thermosetting composition is provided which comprises the reaction product of (a) at least one N,N'-bis-imide of an unsaturated dicarboxylic acid, of general formula ##STR1## in which T represents a divalent organic radical containing a carbon-carbon double bond and Q is a divalent organic radical of 2 to 30 carbon atoms, (b) at least one polyamine of general formulaR (NH.sub.2).sub.xin which x is an integer at least equal to 2, and R represents an organic radical of valency x, the bis-imide being present in an amount of 0.55 to 25 mols per molar --NH.sub.2 group of the polyamine, and (c) at least one monomer other than a bis-imide of formula (I), which contains a carbon-carbon double bond and is heat-polymerizable.

Abstract: Linear homopolymers of 3,5,5-trimethyl-5-sila-.delta.-valerolactone are crosslinked through the 5-methyl group, e.g. by heating with an organic peroxide, to give polymers. Films of these crosslinked polymers have a critical surface tension similar to Teflon and can be used for water proofing. The films also exhibit selective permeability to gases and can be used to reduce the CO.sub.2 content of CO.sub.2 /O.sub.2 mixtures.

Abstract: 5-Alkyl-10-amino-10,11-dihydrodibenzo[b,f]azepines, useful as starting materials for the preparation of agricultural fungicides and also as therapeutic agents, are obtained by the reaction in an inert organic solvent of an N-alkyl-N-o-tolylanthranilonitrile with an alkali metal amide prepared from an amine, and the imino radical in the resulting 10-imino-10,11-dihydrodibenzo[b,f]azepine is converted to the amino radical by catalytic hydrogenation.

Abstract: Organopolysiloxane copolymers comprising units of the general formulae ##STR1## wherein R represents an alkyl group with 1 to 3 carbon atoms or a vinyl group, R' represents a divalent hydrocarbon radical with 1 to 10 carbon atoms, Q represents an organic radical of the formula --OG, ##STR2## or --OSiR.sub.3 in which G represents an alkyl radical with 1 to 4 carbon atoms, and each R group, which may be identical or different, is as defined above, n represents 2, 3 or 4, the C.sub.n H.sub.2n group being straight or branched and y represents a number from 4 to 60; the C.sub.n H.sub.2n groups being the same or different, the ratio of the number of (CH.sub.3).sub.2 RSiO.sub.0.5 units to the number of SiO.sub.2 units being 0.55:1 to 0.75:1 and the ratio of the number of ##STR3## units to the number of SiO.sub.2 units being 0.005:1 to 0.1:1 are used as stabilizers in the preparation of open-cell polyvinyl chloride foams. The raw foams can be easily shaped or moulded prior to gelling and gel without gain of density.

Abstract: Compounds of the formula: ##STR1## wherein one of the symbols =X-- represents =N-- and the other three each represent a group ##STR2## in which Y represents hydrogen, halogen, alkyl, alkoxy, cyano or nitro, at least two of the symbols representing hydrogen, Z represents hydrogen, halogen, alkyl, alkoxy, trifluoromethyl or nitro, and (i) n represents zero and R represents hydrogen, alkyl, alkenyl, alkynyl, hydroxyalkyl or phenyl, or (ii) n represents 1 and R represents alkyl, hydroxyalkyl or phenyl, are new compounds possessing pharmacological properties; they are particularly active as tranquilizers and anti-convulsant agents.

Abstract: Quaternary ammonium salts of the formula: ##STR1## in which R is alkyl of 7 to 16 carbon atoms and X.sup.- is a monovalent anion, have interesting germicidal properties, especially against Gram-negative bacteria.

Abstract: New salts of the formula: ##EQU1## WHEREIN N REPRESENTS 3 OR 4, A REPRESENTS AN INTEGER FROM 1 THROUGH 10, B REPRESENTS ZERO OR AN INTEGER FROM 1 THROUGH 9, C REPRESENTS ZERO OR 1, AT LEAST ONE OF THE INDICES B AND C REPRESENTING AN INTEGER, AND D REPRESENTS ZERO OR AN INTEGER FROM 1 THROUGH 19, THE NUMBERS REPRESENTED BY THE INDICES A, B, C AND D BEING CONNECTED BY THE RELATIONSHIP A + D = 3 B + 2 C, POSSESS PHARMACOLOGICAL PROPERTIES, AND ARE PARTICULARLY USEFUL AS ANTI-ULCER AGENTS AND AS AGENTS FOR PROTECTING THE GASTRO-INTESTINAL MUCOUS MEMBRANE.

Abstract: Polyoxetanes are provided which consist essentially of a plurality of units of the formula: ##EQU1## AND OPTIONALLY, OF UNITS OF AT LEAST ONE OF THE FORMULAE: ##EQU2## in which: EACH OF X.sub.1 and X.sub.2, which may be identical or different, represents a chlorine or bromine atom,Y is as defined under X.sub.1 or represents a radical of formula --O--Ar--CH.sub.2 X.sub.2 or --O--Ar',Each of the Y.sub.1 radicals, which may be identical or different, represents a --O--Ar' or --O--Ar--CH.sub.2 X.sub.2 radical, Ar represents a divalent aromatic radical, the two free valencies of which are carried by carbon atoms of one or two aromatic benzene rings andAr' represents the radical --ArH, the units (I) to (V) being connected to one another via the oxygen atom with a free valency of one of the units and a methylene group with a free valency of the adjacent unit.

Abstract: 20,798 R.P., which has valuable anti-tumor properties, and acid addition salts thereof are prepared by the microbiological reduction of daunorubicin of the formula: ##SPC1##Or of an acid addition salt thereof, to convert the grouping --CO--CH.sub.3 to --CHOHCH.sub.3.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree. C and 350.degree. C, a bis-imide of the general formula: ##STR1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:R (NH.sub.2).sub.xin which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula:G -- CH = N -- N = CH -- Gin which G represents a monovalent aromatic radical, in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.2 represents the number of mols of polyamine employed and N.sub.3 represents the number of mols of alazine employed, the ratio ##EQU1## is at least 1.3, x being defined as above.

Abstract: An alkenylaromatic polymer is provided derived from 50 to 100 mol % of at least one monomer of the general formula: ##STR1## in which R' represents a hydrogen atom or a methyl radical and R" represents a hydrogen atom or a methyl or ethyl radical, and 0 to 50 mol % of a non-aromatic ethylenically unsaturated monomer, optionally cross-linked by 0.1 to 30 mol %, relative to the monomer of formula (I), of a polyvinyl monomer, 0.01 to 1 .alpha.-ketoaldehyde group of the formula-- CO -- CHO II.being present per aromatic ring in the polymer. These polymers find particular utility in extracting sulphur and nitrogen-containing compounds from solutions containing them, especially urea from solutions resulting from the dialysis or ultrafiltration of human blood.

Abstract: Optically active diphosphines of the formula, ##STR1## in which the phosphinomethyl groups are trans to each other, form rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.

Abstract: Cross-linked resins of good thermal stability useful inter alia for making multicellular materials, for bonding metals, and for making laminates and moulded articles are made by reacting, e.g. by heating together, an unsaturated bis-imide with a diprimary diamine in a ratio of 1.2:1 to 50:1.