Abstract: Self-extinguishing, fine particulate, expandable styrene polymers for the manufacture of molded articles, containing bromine compounds and one synergist. The synergist, referred to the styrene polymer, is at least one hydrocarbon present in amounts from about 0.1 to 3% by weight and forms stable radicals at temperatures above 300.degree. C.

Abstract: A method of preparing 2,4,6-triketohexahydrotriazines which comprises catalytically trimerizing an organic isocyanate at 60.degree.-150.degree. C. in an inert, polar solvent present in an amount of 5-40 weight % with respect to the quantity of said isocyanate, in the presence of 0.1-5 weight % of a catalyst of the formula ##STR1## or hydrated derivatives of said catalyst, wherein R is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl, and Me.sup.+2 is a bivalent metal cation; interrupting the trimerization at a conversion of about 50% by cooling; and then isolating the 2,4,6-triketohexahydrotriazine.

Abstract: Fine particulate expandable styrene polymers have coatings applied thereto by:(a) introducing the fine particulate expandable styrene polymers into a closed mixing vessel;(b) reducing the pressure in the mixing vessel below atmospheric;(c) preparing dispersions of the coating materials and heating the dispersions to about 30.degree. to 90.degree. C.; and(d) aspirating the heated dispersions of the coating materials into the mixing vessel while simultaneously mixing the dispersions with the particulate styrene polymers to form a coating thereon and drying the coated particles.

Abstract: Method of spot coating garment interlinings comprising a suspension agent for synthetic resin powders comprising an aqueous emulsion wherein there is contained, in a concentration of about 1-7.5 percent by weight:(A) a mixture of about 95-40 molar percent of an aminoamide of the general formula ##STR1## wherein R represents a saturated or unsaturated hydrocarbon group having 18-19 carbon atoms,n represents an integer of between 2 and 6, andR.sub.1 and R.sub.2 represent alkyl groups having 1-3 carbon atoms; and(B) about 5-60 molar percent of a fatty acid or mineral acid salt of this aminoamide.

Abstract: An improvement in the process for obtaining gaseous hydrogen chloride by extracting dilute aqueous hydrochloric acid with amines wherein:(a) the aqueous hydrochloric acid is extracted with an amine or a mixture of an amine and an inert, water-immiscible solvent boiling at not less than 120.degree. C., using tertiary alkylamines which contain 14 to 36 carbon atoms in the nitrogen-bonded side chains, which side chains include at most one nitrogen-bonded methyl group and at least one nitrogen-bonded aliphatic radical containing at least 6 carbon atoms, the acid constant K.sub.a of the amine being less than 10.sup.-3 ;(b) an inert, water-immiscible solvent boiling at not less than 120.degree. C.

Abstract: A process for the coating of glass surfaces with a transparent, duroplastic protective layer of more than 50 microns which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying the treated surface and then coating the dry surface with a paste of aliphatic or cycloaliphatic diisocyanates or mixtures thereof or the reaction products with water in the mole ratio of 2:.ltoreq.1 and a mixture of hydroxy-group-containing compounds consisting of40-80 wt. %, trifunctional, hydroxy-group-containing polyester polyols made of aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and a mixture of triols, diols or tricarboxylic acids, with an average molecular weight of 300 to 1400,15-50 wt. % bifunctional, hydroxy-group-containing polyester polyols from aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and diols, with an average molecular weight of 400 to 2000 and, if necessary,2.5-25 wt.

Abstract: A method of purifying tertiary amines by removing sec. and prim. amines and/or their hydrochlorides produced in the manufacture of the tertiary amines. The impurities are removed by dissolving the impure tertiary amines in an organic solvent and the resulting solution is passed over absorbents such as aluminum oxides having a specific surface area of about 100 to 400 square meters per gram. The sec. and prim. amines and/or their hydrochlorides are retained on the adsorbents and pure tertiary amines are useful in the solvents or can be separated therefrom. The adsorbents are regenerated by passing polar solvents thereover to remove the sec. and prim. amines and/or their hydrochlorides.

Abstract: Powdered, heat-hardenable coating materials with high storage stability and a grain size smaller than 0.25 mm based upon hydroxy-group-containing polyesters with melting points between 40.degree. and 120.degree. C., blocked polyisocyanates and optionally catalysts, wherein the coating material contains polyisocyanates blocked with cyclic amidines of the general formula ##STR1## wherein R=equal or different substituents selected from the group consisting of hydrogen, alkyl-, cycloalkyl-, aralkyl-, and alkyl radicals. A method for the production of the above mentioned coating materials and a process for coating substrates with these materials is also disclosed.

Abstract: A method of separating HBr from a mixture of HBr/HCl using the difference in the stability to heat of the amine hydrohalides thereof. A mixture of HBr/HCl is treated with a solution of an amine and the HCl is split off, by the action of heat, from the amine hydrochlorides in the resulting mixture of amine hydrochlorides and amine hydrobromides, and the HBr is then recovered from the residual amine hydrobromides with the aid of a base and optionally recovered.

Abstract: A process for the fractional desublimation of pyromellitic acid dianhydride in the form of free-flowing crystals which comprises reducing a reaction gas containing pyromellitic acid dianhydride produced by a chemical reaction which also produces by-products, to a temperature above the thaw point of the by-products but below the desublimation point of pyromellitic acid dianhydride by means of a smooth thermostaticized cooling surface, directing the reaction gases at maximal flow velocities of 3 m/sec parallelly to the cooling surface and separating the fraction of crystals not adhering to the surface.

Abstract: A powdery polyurethane lacquer which comprises (a) a hydroxyl-group containing polyester resin with an OH number of 40-240 and (b) an .epsilon.-caprolactam-blocked polyisocyanate, selected from the group consisting of triisocyanatoisocyanurate of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate and mixtures of said triisocyanatoisocyanurate with monomeric or oligomeric 3-isocyanatomethyl-3,5,5-trimethyl-cyclohexylisocyanate; wherein the .epsilon.-caprolactam-blocked triisocyanatoisocyanurate has at least two blocked isocyanate groups and wherein the .epsilon.-caprolactam-polyisocyanate is present in an amount sufficient to cause hardening of said mixture of (a) and (b). The lacquer is especially useful for electrostatic coating of substrates.

Abstract: A method for the production of blocked isocyanate-and isocyanurate group-containing compounds which comprises:transforming a monomeric aliphatic or cycloaliphatic polyisocyanate or a mixture thereof into an intermediate mixture comprising an isocyanurate containing at least 2 free isocyanate groups; andblocking said intermediate isocyanurate mixture with dimethylketoxime at 50.degree.-120.degree. C.;wherein the amount of said dimethylketoxime is such that one equivalent of NCO group reacts with one equivalent of said dimethylketoxime.The mixtures of the present invention are particularly suited as co-catalysts for the anionic polymerization of epsilon-caprolactam, as well as hardeners for higher functional thermoplastic compounds which contain Zerewitinoff-active hydrogen atoms.

Abstract: Baking lacquers on the basis of a blend of hydroxy-group-containing polymers, blocked polyisocyanates and organic solvents which comprise40-70 wt. % hydroxy-group-containing polymers with hydroxy numbers between 40 and 240 and polyisocyanates blocked with cyclic amidines of the formula: ##STR1## wherein R are equal or different substituents selected from the group of hydrogen, alkyl-, cycloalkyl-, aralkyl- and aryl radicals, whereby the components are used in such amounts that 0.8 to 1.2 NCO-group equivalents are applied for each hydroxy group equivalent,0-2 wt. % cross-linking catalyst,30-60 wt. % organic solvent or solvent mixture, wherein the percentages of polymer, catalyst and solvent add up to 100. Pigments, colorants, flowing agents, gloss improvers, antioxidants and heat stabilizers may also be added. The lacquers are used for coil-coating lacquering in weather resistant single and double layer lacquering.

Abstract: An aqueous polybutadiene dispersion is applied as the adhesive intermediary layer in the preparation of polyamide coatings on metal objects by a process of sintering the polyamide powders.The dispersion contains a liquid polybutadiene with a dynamic viscosity from about 70 to 30,000 millipascal seconds and with a configuration of 40 to 95% of cis-1,4-polybutadiene, 0 to 30% of trans-1,4-polybutadiene, 1 to 60% of 1,2-polybutadiene and, referred to the polybutadiene, 0.5 to 10% by weight of an emulsifier.

Abstract: A method for the production of single-component polyurethane lacquers which comprises:reacting (1) a polyester having an OH-functionality of at least 2, an OH-count of 70-150 mg KOH/g and a molecular weight of about 800-2500, derived from (A) an acid selected from the group consisting of ortho-, meta-, and para-dicarboxylic acids, 1,2,5-bezenetricarboxylic acid, 1,3,5-benzenetricarboxylic acid, C.sub.1 -C.sub.4 alkyl esters thereof and mixtures thereof and (B) a glycol with a heteroatom-free chain which chain consists of 5-8 carbon atoms with(2) a dimethylketoxime-blocked cycloaliphatic polyisocyanate; wherein the equivalence ratio of said OH groups to said blocked isocyanate groups is 1.0:0.7 to 1.0:1.1.

Abstract: Suspension agent for synthetic resin powders comprising an aqueous emulsion wherein there is contained, in a concentration of about 1-7.5 percent by weight:(A) a mixture of about 95-40 molar percent of an aminoamide of the general formula ##STR1## wherein R represents a saturated or unsaturated hydrocarbon group having 13-19 carbon atoms,n represents an integer of between 2 and 6, andR.sub.1 and R.sub.2 represent alkyl groups having 1-3 carbon atoms; and(B) about 5-60 molar percent of a fatty acid or mineral acid salt of this aminoamide.

Abstract: A method of manufacturing hydrogen chloride by splitting off hydrogen chloride from solutions of amine hydrochlorides. The hydrogen chloride is split off by heating the amine hydrochlorides at 100.degree. to 250.degree. C. in an inert, organic, essentially non-polar solvent having a boiling point at least 20.degree. C. above the temperature of heating while an inert gas stream is passed therethrough. The hydrogen chloride is then separated from the exiting mixture of inert gas and hydrogen chloride. The amine components of the amine hydrochlorides are tertiary alkylamines, tertiary aryldialkylamines, secondary arylalkylamines, primary alkylarylamines or mixtures thereof which contain 14 to 36 carbon atoms in the side chains bonded to nitrogen. Not more than one of the side chains of the amine component is a methyl group bonded to nitrogen and at least one of the side chains is an aliphatic radical, bonded to nitrogen, containing at least 6 carbon atoms. The inert solvents boil above 120.degree. C.

Abstract: The process for the preparation of shaped bodies based on expanded styrene polymers comprising: the polymerization of styrene or a mixture thereof with at least one monomer copolymerizable therewith, the addition of an expanding agent, pre-forming of the resulting expandable particles, ageing of the pre-formed particles, and molding thereof in a pressure resistant mold, is improved in the decrease of the minimum mold dwell time by carrying the polymerization in the presence of 0.0005 to less than 0.01% by weight based on the styrene polymer of organic bromine compounds which give a chain transfer constant of at least 200 and at 100.degree. C. in bidistilled water the bromine compounds split off less than one molar % of hydrogen bromide per equivalent of bromine present in the molecule.

Abstract: Process for the preparation of pure methyl tert.-butyl ether. Isobutene or isobutene-containing hydrocarbon mixtures are reacted with methanol in a molar ratio of 1:1 to 1:2 in the liquid phase at temperatures of between 30.degree. and 100.degree. C. on sulfonated, strongly acidic, macroporous organic ion exchange resins. After separation of the unreacted hydrocarbons, the reaction mixture is distilled under pressure; the methanol-containing distillate formed during the distillation is recycled into the zone of the reaction between methanol and isobutene; and pure methyl tert.-butyl ether is withdrawn from the sump of the distillation column.

Abstract: Method for the preparation of aqueous, finely dispersed, shelf-stable silicone oil emulsions with the use of emulsifiers. Dimethyl polysiloxanes and 0.1-0.3 part by weight of emulsifiers, based on the dimethyl polysiloxanes, of a monoester or diester of orthophosphoric acid or mixtures thereof, are mixed, with agitation at temperatures of between 20.degree. and 150.degree. C. until a clear solution is obtained; thereupon an organic base or alkali is added up to neutralization; and subsequently the neutralized mixture is diluted with water.The monoesters and diesters of orthophosphoric acid and mixtures thereof comprising the emulsifiers are prepared by the reaction of:(a) 1-n-octanol or 1-n-octenol with P.sub.2 O.sub.