Abstract: The present invention relates to novel novolac resins obtained by coupling at least one aromatic compound (A) comprising at least two hydroxyl groups and at least one aldehyde (B) in the presence of an acid catalyst and in the presence of water and/or an organic solvent, followed by a step of alkylating the coupling resin thus obtained with at least one unconjugated diene (C), preferably containing no indene. These novolac resins are advantageously used in vulcanized and crosslinked elastomeric compositions since their viscosity, which is lower than that of the resins of the prior art, allows them to be handled easily. They are also used as adhesion promoters for improving the adhesion of rubber to reinforcing materials such as organic fibres made in particular of rayon, polyesters, polyamides or aramids, and metal cords made of steel, in particular brass steel or galvanized steel.

Abstract: The present invention relates to a liquid composition for the cold preparation of laminate composite materials so as to confer to them, without preliminary sanding or abrasion, a surface state favorable to adhesive bonding with polyurethane type adhesives comprising (a) at least one polar aprotic solvent (TPA); (b) at least one ether (TE) selected from ethers, ether-esters, and ether-ketones having: a molar volume less than 200 cm3/mole and preferably less than 160 cm3/mole, a molecule devoid of a hydroxyl function, and (c) at least one activator (TA) comprising at least one reactive nitrogenous function of the —NH2 and/or —NH— type of molar volume less than 100 cm3/mole.

Abstract: The present invention relates to novel novolac resins obtained by coupling at least one aromatic compound (A) comprising at least two hydroxyl groups and at least one aldehyde (B) in the presence of an acid catalyst and in the presence of water and/or an organic solvent, followed by a step of alkylating the coupling resin thus obtained with at least one unconjugated diene (C), preferably containing no indene. These novolac resins are advantageously used in vulcanized and crosslinked elastomeric compositions since their viscosity, which is lower than that of the resins of the prior art, allows them to be handled easily. They are also used as adhesion promoters for improving the adhesion of rubber to reinforcing materials such as organic fibres made in particular of rayon, polyesters, polyamides or aramids, and metal cords made of steel, in particular brass steel or galvanized steel.

Abstract: The present invention relates to a liquid composition for the cold preparation of laminate composite materials so as to confer to them, without preliminary sanding or abrasion, a surface state favorable to adhesive bonding with polyurethane type adhesives comprising

Abstract: The invention concerns inhibitor compositions based on fatty sulphydryl acid and poly(ethyleneamino)imidazoline salts for considerably reducing the corrosive effect of carbon brine on iron and ferrous metals. These compositions are as efficient when the corrosive medium is driven with a high flowrate and in biphasic brine/oil medium.

Abstract: Polymethylenepolyaminedipropionamides are carbonic corrosion inhibitors devoid of toxicity to the marine environment.

Abstract: Aqueous-alcoholic solutions of hydrogenated coconut or palm kernel oil alkylamidopropylbetaines with a betaine content of greater than 50%, which are fluid, stable and pumpable are described as occupying a well-defined zone of their betaine/water/ethanol ternary diagram. They are prepared by synthesis and quaternization of the amidoamine directly in the solvent medium in which they are defined.

Abstract: Aqueous-alcoholic solutions of coconut or palm oil alkylamidopropylbetaines with a betaine content of greater than 50%, which are fluid, stable and pumpable are described as occupying a well-defined zone of their betaine/water/ethanol ternary diagram. They are prepared by synthesis and quaternization of the amidoamine directly in the solvent medium in which they are defined.

Abstract: The invention relates to cleavable surfactants of formula: in which R′ and R, which may be identical or different, represent a hydrogen atom or a linear or branched, saturated or unsaturated alkyl radical, the sum of the carbon atoms of R′ and R being between 5 and 42. The invention also relates to the corresponding derivatives obtained by alkaline hydrolysis or amidation. The invention furthermore relates to the preparation of these surfactants from glucono-1(5)-lactone and a compound of formula R—CO—R′ in the presence of an acid catalyst, R and R′ having the meaning given above. The surfactants are used in particular in emulsion polymerization and in the field of cosmetics.

Abstract: Acrylic copolymers for use as additives for inhibiting paraffin deposition in crude oils, and compositions containing the oils and said additives, are disclosed. Specifically, polymeric additives useful for inhibiting paraffin deposition in and improving the flow properties of crude oils, and compositions containing the crude petroleum oils and said additives, are disclosed. Said additives are essentially alcohol acrylate copolymers comprising 10-50 carbons with special chain distributions, as well as the corresponding 2- and/or 4-vinylpyridine terpolymers.

Abstract: A process of manufacture of phenolic resins using calcium catalysis not comprising any filtration stage. This result is obtained by holding back the precipitation of the calcium species by the combined use of a chelatant/sequestrant and of a dispersing anionic polymer. Resins which are stable in storage and with excellent water tolerance.

Abstract: Inexpensive paint stripper compositions containing neither chlorinated nor alkaline solvents and well adapted for removing paints such as glycerophtalic, alkyd-urethane or arylic urethane paints on a variety of substrates, e.g. wood and metal substrates comprise (a) 1 to 99% by volume of an aprotic polar solvent chosen from the group comprising: dimethyl sulfoxide, dimethyl formamide, N-methylpyrrolidone, N-methylmorpholine, .gamma.-butyrolactone, acetonitrile and mixtures thereof; and (b) 99 to 1% by volume of an ether selected from the family of ethers having a flash point higher than 0.degree. C., a molar volume less than 160 and a molecule that includes one or several methoxy groups.

Abstract: The invention relates to fluoroalkyl derivatives of uronic acids of the formula: ##STR1## and the corresponding lactones, as well as a process for the preparation of the said compounds, which comprises reacting a glycosiduronic acid or a glycosiduronolactone with an alcohol of formula R.sub.1 OH, which process may also include steps of basiciation and acidification. The compounds according to the invention may be used in particular as surfactants.

Abstract: The invention relates to compounds of formula: ##STR1## The invention also relates to a process for the preparation of the said compounds, which consists in:a) reacting dianhydro-1,4:3,6-D-glucitol with a compound of formula RCOOR' or RCH.sub.2 Y in the presence of a catalyst to form compounds of formula: ##STR2## in which: Y represents a halogen or an alkyl or arylsulfonic radical,R' represents a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms,R represents a saturated or unsaturated linear or branched alkyl radical containing from 5 to 21 carbon atoms,x represents CO or CH.sub.2 ;b) reacting the product of step a) with phosphorus oxychloride, a base and an anhydrous solvent, to form the compounds of formula (I) and/or (II), and optionally in separating them.The compounds which form the subject of the invention can be used in the field of surfactants, in particular for the preparation of cosmetic or hair compositions.

Abstract: Compounds of the formula?P!(ACH.sub.2 NH.sub.2).sub.xin which P denotes a partially hydrogenated 1,3-diene oligomer residue, x is practically equal to 2 and A denotes a divalent residue such as ##STR1## are obtained by selective hydrogenation of compounds of formula ?P.sub.1 !(ACN)x in which P.sub.1 denotes a 1,3-diene oligomer residue.

Abstract: Inexpensive paint stripper compositions containing neither chlorinated nor alkaline solvents and well adapted for removing paints such as glycerophtalic, alkyd-urethane or acrylic urethane paints on a variety of substrates, e.g. wood and metal substrates comprise (a) 1 to 99% by volume of an aprotic polar solvent chosen from the group comprising: dimethyl sulfoxide, dimethyl formamide, N-methylpyrrolidone, N-methylmorpholine, .gamma.-butyrolactone, acetonitrile and mixtures thereof; and (b) 99 to 1% by volume of an ether selected from the family of ethers having a flash point higher than 0.degree. C. a molar volume less than 160 and a molecule that includes one or several methoxy groups.

Abstract: The subject of the invention is dewetting or degreasing compositions based on halogenated aliphatic solvents containing in solution at least one mono- or dialkyl phosphate of a fluorinated amine, at least one quaternary ammonium mono- or dialkylphosphate and optionally a quaternary ammonium chloride.

Abstract: The methylated tertiary amines are selectively prepared by reacting a primary or secondary amine, or a nitrile or aminonitrile, including an aminoalcohol, etheramine, a polyamine or fatty polyamine or amidoamine, or amidopolyamine or dinitrile, with hexamethylenetetramine ("HMTA"), under hydrogen pressure at a temperature no greater than about 160.degree. C. and in the presence of a catalytically effective amount of a hydrogenation catalyst, e.g., nickel deposited onto appropriate support substrate therefor.