Abstract: The invention relates to mixtures of polymers including at least one halogen-containing polymer and compatibilized with a grafted aliphatic polyester. The compatibilizing agent may be, for example, a polycaprolactone grafted with maleic anhydride or glycidyl methacrylate.

Abstract: Stripping action of an alkaline paint stripper is improved when ammonia is partially or completely replaced with ammonium bicarbonate or chemical equivalent thereof which decomposes into ammonia and carbon dioxide. A benzyl alcohol solvent system containing at least ammonium bicarbonate is preferably a water-in-oil emulsion emulsified with oleic hydroxyethyl imidazoline and thickened with hydroxypropyl cellulose or hydroxypropyl methylcellulose. A mixture of ammonium carbamate and ammonium bicarbonate identified as ammonium carbonate is the preferred activator for this alkaline paint stripper. Improved stripping can also be provided by reacting ammonium bicarbonate and ammonia in situ within the water-in-oil emulsion.

Abstract: Bifunctional primer naphthalene compounds having the formula: ##STR1## wherein M" is an alkali metal, preferably sodium or lithium, and R.sup.1 and R.sup.2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalene derivatives, and are well suited for the improved anionic polymerization of diene, vinylaromatic and/or (meth)acrylic monomers.

Abstract: To obtain a compound of formula (I), an anhydride (II) is reacted with a heterocyclic alcohol (III). After the reaction, the excess (meth)acrylic anhydride can be hydrolysed to (meth)acrylic acid by addition of water and heating between 25.degree. and 70.degree. C., preferably between 30.degree. and 50.degree. C., in order to obtain the compound (I) in solution in water and (meth)acrylic acid: ##STR1## R.sup.1 .dbd.H or CH.sub.3 ; A and B each independently represent a straight- or branched-chain C.sub.2 -C.sub.5 alkylene group.

Abstract: The invention relates to the use of fluorinated copolymers based on trifluoroethylene (VF3) and tetrafluoroethylene (C.sub.2 F.sub.4), having melting points above 210.degree. C. and soluble in the customary polar solvents, as protective coatings for a variety of substrates (plates, wires, cables, fibers, etc.) in the form of extruded films or sheaths or in the form of varnishes and paints.

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 no nitroalkane.The composition according to the invention can be used for degreasing, cleaning and/or drying metal components.

Abstract: The solid catalytic component according to the invention is obtained bya) treatment of a catalytic component support with ZrCl.sub.4 or HfCl.sub.4 in the gas phase, followed by ab) treatment with a solution or suspension of a compound capable of grafting a group containing the cycloalkadienyl skeleton to the Zr or Hf contained in the support. Polymerization of olefins in the presence of such a catalytic component results in polymers with low polydispersities, which polymers are obtained with high productivities.

Abstract: Process for the polymerization in aqueous suspension of acrylic monomers in the presence of a polymeric suspending agent, homopolymer or copolymer of a compound of formula: ##STR1## wherein: R.sub.1 is H or CH.sub.3 ; R.sub.2 and R.sub.3, equal or different, are H or alkyls C.sub.1 -C.sub.8, optionally branched when possible; M is an alkaline or alkaline-earth metal or ammonium and A is NH, O or NCH.sub.3, characterized in that the polymerization aqueous phase is wholly or partly formed by the mother waters obtained after the separation of the acrylic polymer, so as to have a polymerizable suspension containing at least 0,01% by weight and up to about 1% of said suspending agent and at least from 0.05% to 5% by weight of the other products above mentioned obtained during the polymerization.

Abstract: To recover these noble products consisting of acrylic acid monomer, acrylic ester monomers and alcohols, a thermal cracking is performed in the absence of catalyst on a mixture of heavy distillation residues originating, on the one hand, from the manufacture of acrylic acid and, on the other hand, from the manufacture of the esters, the light fraction originating from the dissociation reactions is continuously vaporized during the cracking operation and this light fraction is distilled in order to recover, after condensation, the required products.

Abstract: This invention relates to aqueous emulsions based on uncured and uncurable acrylic polymers and their use for the forming process of the cathode ray tube comprising as comonomers the following components:A) butylmethacrylate from 45-70 parts by weightB) methylmethacrylate from 20-45 parts by weightC) methacrylic acid from 1-4 parts by weightD) ethylacrylate from 5-9 parts by weighthaving a minimum filming temperature such as to produce film between about 20.degree. and 40.degree. C., with or without the use of coalescent agents, the nitrogen thermal cycle which simulates that utilized in the CRT process, being the following:1.degree. scanning: from 25.degree. C. to 375.degree. C. at 11.degree. C./min.2.degree. scanning: from 75.degree. C. to 440.degree. C. at 5.degree. C./min.3.degree. scanning: isotherm at 440.degree. C. for 45 minutes,the organic residue after said thermal treatment being lower than 0.05% by weight, preferably 0.01%.

Abstract: A material useful for manufacturing food packagings is formed from a film covered with silicon oxide and a polyolefin film, such that the binder arranged between the film covered with silicon oxide and the polyolefin film is selected from the group consisting of polyolefins grafted with unsaturated alkoxysilanes, polyolefins grafted with unsaturated epoxides, and copolymers of ethylene with at least one unsaturated epoxide.

Abstract: A process for the preparation of 3-chloropropionic acid consists especially in simultaneously introducing hydrochloric acid gas and acrylic acid at a molar ratio of 0.7:1 to 1.3:1 into a sediment consisting of 3-chloropropionic acid optionally diluted with water or with an aqueous hydrochloric acid solution.

Abstract: The subject of the present invention is a new process for obtaining nitrones. It more particularly relates to a process for obtaining N-monosubstituted hydroxylamine comprising a stage in which a nitrone is formed from a secondary amine in the presence of an oxidizing agent and of at least one C.dbd.O containing species chosen from the group consisting of carbon dioxide, hydrogencarbonates and carbonates.

Abstract: The present invention relates to hot-melt adhesive compositions based on copolymers of ethylene, vinyl acetate and vinylalkoxysilane units, which are crosslinkable by moisture, wherein the hot-melt adhesive is substantially anhydrous. More particularly, it relates to the storage stability of the hot-melt adhesive compositions including at least one crosslinking catalyst. The invention also relates to a process for the manufacture of the hot-melt adhesive composition comprising drying the hot-melt adhesive under vacuum at a temperature lower than 180.degree. C. and purging with a dry gas at a temperature lower than 180.degree. C.

Abstract: The subject of the invention is the compounds of formula: ##STR1## in which R denotes a saturated or unsaturated, linear or branched alkyl group containing from 5 to 21 carbon atoms.The invention also relates to a process for the preparation of the abovementioned compounds, characterized in that it consists ina) forming an N-acylglucosamine from glucosamine hydrochloride and C.sub.6 -C.sub.22 acid chloride, andb) reacting the compound from stage a) with glycerol in the presence of an acid catalyst.It also relates to detergent or cosmetic compositions including the abovementioned compounds.

Abstract: This photopolymerizable composition includes an grafted reactive telomer containing trifluoroethyl methacrylate units, a reactive diluent and a photopolymerization initiator. It gives hydrophobic transparent coatings.

Abstract: Liquid methyltin halide compositions and their use as intermediates in chemical synthesis and as precursors for forming tin oxide coatings on substrates are disclosed.

Abstract: Natural or synthetic wax dissolved in the continuous organic phase of an water-in-oil emulsion retards evaporation of water from a dispersed aqueous phase. An in situ prepared equilibrium mixture of benzyl alcohol, formic acid and benzyl formate emulsified with oleic hydroxyethyl imidazoline or similar oil soluble emulsifying agent is thickened with hydroxypropyl cellulose or hydroxypropyl methylcellulose and contains 0.1 to 1.0% by weight paraffin wax with a melting point of 47.degree. to 65.degree. C. Wax dissolved in the organic phase retards evaporation of water, and formic acid or ammonia which are very volatile in comparison with benzyl alcohol forming the major component of the organic phase. A petroleum distillate is used to pre-wet a hydroxypropyl cellulose thickener and dissolve the wax.

Abstract: This invention relates to an initiating system for the anionic polymerization of acrylic monomers, and where necessary vinyl comonomers, including at least one R-M initiator in which M is a metal chosen from among the alkali and alkaline earth metals and R is a linear or branched chain alkyl, aryl, or arylalkyl radical. The polymerization may also take place in the presence of at least one R.sub.1 OM.sub.1 alkali metal alcoholate, in which R is an linear or branched chain alkyl, aryl, or arylalkyl radical and M.sub.1 is an alkali metal, on the condition that when M.sub.1 is lithium, then R is an aryl or arylalkyl radical. This invention also related to a process for the polymerization of primary, secondary, or tertiary alkyl acrylates, and possibly of vinyl comonomers, in the presence of the initiating system described above.

Abstract: To replace the azeotropic mixture of chlorodifluoromethane and chloropentafluoroethane (R-502) in low-temperature refrigeration, the invention proposes to use a pseudo-azeotropic mixture containing 45 to 50% by weight of chlorodifluoromethane, 44 to 48% by weight of 1,1,1-trifluoroethane, and 6 to 8% by weight of pentafluoroethane. The thermodynamic properties of this mixture are very similar to those of mixture R-502.