Abstract: An ethylene/polyalkyleneglycol(ether) (meth)acrylic ester copolymer and a nonporous breathable film obtained therefrom are provided, the polymer comprising the following monomer units:(i) from 99 to 50% by weight ethylene;(ii) from 1 to 50% by weight of a monomer of formula ICH.sub.2 .dbd.C(R.sub.1)--COO--?C.sub.m H.sub.2m --O!.sub.n --H(I)in which R1 is H or CH.sub.3, m is 2, 3 or 4; n is comprised between 2 and 25; and(iii) from 0 to 20% by weight of a third monomer;said copolymer having a mean molecular weight comprised between 5,000 and 65,000.

Abstract: A material is provided comprising: (a) a polyamide; (b) a polymer having PA blocks and polyether PEG blocks; (c) optionally a polyolefin; (d) a functionalized polyolefin; the various constituents being present in amounts by weight, a, b, c and d such that: a>0; b>0; c+d>0; a+b+c+d=100; with a/b>0.2; (a+b)/(c+d)>1; and b/(a+b+c+d)<0.5. A film which is non-porous but breathable, i.e. porous to water vapor but not to water, and an antistatic object obtained from this material are also provided.

Abstract: The use of a mixture of cycloalkanes of general formula C.sub.n H.sub.2 (n+1-a) in which n is an integer ranging from 8 to 12 and a represents the number of rings as agent for cleaning and degreasing solid surfaces, e.g., printed circuits. The mixture has a flash point above 55.degree. C. (ASTM D56-70) and a distillation range of 175.degree. C. to 235.degree. C.

Abstract: To remove the olefinic impurities from a hydrochlorofluoroethane of formula: CF.sub.3 --CHClX (X=H, F, or Cl), it is subjected to a photochlorination stage.

Abstract: A method for the production of a sulfide group-containing thiol compound which comprises causing alkylene sulfide to react with a thiol compound in the presence of at least one basic catalyst selected from the group consisting of basic ion-exchange resins, quaternary ammonium compounds and alkyl pyridinium compounds, thereby inducing the ring-opening addition of the alkylene sulfide to the thiol compound. Further, a method for the production of a sulfide group-containing mercaptocarboxylic ester which comprises causing an alkylene sulfide to react with a mercaptocarboxylic ester.

Abstract: The present invention relates to a process for the preparation of graft thermoplastic polymers in which at least one thermoplastic polymer (A) is grafted with a functional monomer in the presence of a substance which inhibits or reduces the crosslinking or the depolymerization of (A).This substance may be a stable nitroxide radical.Graft polymers are useful as compatibilizing agents in mixtures of polymers and as coextrusion binders. The invention also relates to multilayer structures including these binders.

Abstract: The invention provides a coating for a metal surface comprising (i) a primer able to gel and set, (ii) an adhesive and (iii) a thermoplastic polymer, in which said adhesive contains a catalyst, as well as metal objects, particularly pipes, provided with this surface coating, and a method for applying the surface coating.

Abstract: The invention provides a plastic film possessing improved permeability to water vapor and high heat shielding property. Said plastic film is characterized by water vapor permeability of 100 to 25,000 g/m.sup.2 /24 hr, light transmittance of 20 to 95% and infrared transmittance of 5 to 90% and made of at least one material selected from a group comprising polyetherpolyamide block copolymer, thermoplastic polyester elastomer and thermoplastic polyurethane and containing flat inorganic particles coated with a substance having high refractive index.

Abstract: The present invention relates to a process for obtaining .beta.-hydroxy carbonyl compounds and/or .alpha.,.beta.-unsaturated carbonyl compounds, characterized in that at least one aldehyde or one ketone is brought into contact with a solid catalyst of general formula (I):?(Mg.sup.2+).sub.1-x (Al.sup.3+).sub.x (OH.sup.-).sub.2 !.sup.x+ ?(OH.sup.-).sub.x !.sup.x- (H.sub.2 O).sub.n (I)with 0.20.ltoreq.x.ltoreq.0.33 and n<1.

Abstract: A recipient is provided comprising an outer rigid housing and an inner flexible bag under butane gas pressure, in which the inner flexible bag is a material comprising a mixture of polyamide forming a matrix and of functionalized ethylene polymer comprising a functionalized ethylene/(meth)acrylate copolymer.

Abstract: The invention relates to films based on PA-6 or PA-6,6 and on a copolymer containing polyamide (6 or 6,6) blocks and ploytetramethylene glycol blocks. They have greater impact strengths than PA-6 or PA-6, 6 film.

Abstract: The process of the present invention consists in bringing into contact, on the one hand, (A) gaseous phosphorus pentafluoride or a gaseous mixture comprising phosphorus pentafluoride and hydrochloric acid, and, on the other hand, (B) a solution of lithium fluoride in hydrofluoric acid, in a column (10) having a sufficient number of transfer units to carry out the reaction of PF.sub.5 with LiF under the chosen conditions of temperature, of pressure and of molar ratio of the two contrasting reactants and with complete or substantially complete absorption of the PF.sub.5 in the column. This process makes it possible to solve the problems of blockage by preventing recrystallizations of salts; to discharge the heat given off by the reaction by the evaporation of a portion of the HF; and to separate the HCl which may be contained in the starting PF.sub.5, without loss of PF.sub.5, thus allowing subsequent recovery/value enhancement of this HCl.

Abstract: To avoid the formation of acidity in an F125 containing olefins, a radical scavenger and/or an acidity scavenger is added to it.

Abstract: The invention relates to a composition based on stabilized methylene chloride composed essentially of at least one 1,2-epoxyalkane and of at least one acetal, and preferably no nitroalkane.The composition according to the invention can be used for degreasing, cleaning and/or drying metal components.

Abstract: This invention concerns a method for the production of an ethylene sulfide/sulfur copolymer which comprises copolymerizing ethylene sulfide with sulfur. This method permits an ethylene sulfide/sulfur copolymer as a novel copolymer.

Abstract: A process for the purification of 1-chloro-1,2,2,2-tetrafluoroethane (F124) containing 1,2-dichlorotetrafluoroethane (F114) and/or 1,1-dichlorotetrafluoroethane (F114a). The F124 to be purified is subjected to extractive distillation, the extractant being chosen from C.sub.5 -C.sub.8 aliphatic or cycloaliphatic hydrocarbons and C.sub.4 -C.sub.8 perfluoroalkyl halides.

Abstract: Process for the preparation of a carboxyalkylthiosuccinic acid of formula ##STR1## in which n=1 to 3 and R.dbd.H or CH.sub.3, a mercapto ester of formula HS--(CH.sub.2).sub.n --COOR' in which R' is a C.sub.1 to C.sub.4 alkyl radical, is reacted, in aqueous medium and without a catalyst, with maleic acid, citraconic acid or their anhydride. The invention is more particularly directed towards the preparation of carboxyethylthiosuccinic acid (CETSA).

Abstract: The present invention relates to the stabilization of a polymer by a stable free radical and in particular to the use of a stable free radical for inhibiting the degradation of a polymer by a mechanism which does not involve oxygen. This use can be carried out when the polymer is in the presence or in the absence of oxygen. The degradation which can be inhibited can be a depolymerization or a crosslinking.

Abstract: Process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the following formula (I): ##STR1## by reaction, under pressure and in the presence of water, of N,N-dimethylaminoethyl methacrylate with CH.sub.3 --Cl, characterized in that it is carried out in the presence of the pentasodium salt of diethylenetriaminepentaacetic acid.

Abstract: The invention relates to compositions including at least one polyamide (A) and at least one copolymer (B) of ethylene and of at least one unsaturated carboxylic anhydride or acid, such that the impact/fluidity (IF) value of the compositions including 90 parts of (A) per 10 parts of (B) is higher than 1.5 in the case of the compositions containing essentially no glass fibres and such that the IF value of the compositions including 60 parts of (A) per 10 parts of (B) and of glass fibres is higher than 0.9; the IF value is defined as the ratio of the product (i) of the Izod notched impact at 23.degree. C. multiplied by the MFI (Melt Flow Index) of the composition including (A) and (B) to the product (ii) of the impact multiplied by the MFI of the same composition but not including (B).