Abstract: In a process for injection molding foamed parts of polylactide, the polylactide melt contains solvent and cools to below the melting point during the expansion in the mold and is expanded in the temperature range between the glass softening point and the melting point.

Abstract: The invention relates to copolymers containinga) 20-90% of 2-acrylamido-2-methylpropanesulfonic acid, sulfoethyl or sulfopropyl (meth) acrylate or vinylsulfonic acid,b) 0-50% of a vinylic acid,c) 0-70% of methyl or ethyl acrylate or methacrylate, C.sub.2 --C.sub.4 -hydroxyalkyl acrylate or N-vinylpyrrolidone andd) 0.1-10% of styrene or C.sub.4 --C.sub.18 -alkyl acrylate or C.sub.4 --C.sub.18 -alkyl methacrylate.The copolymers according to the invention are particularly suitable as protective colloids for microencapsulation.

Abstract: Disclosed is an apparatus for removing emissions from a broad variety of sources, especially from polymerization operations and thermoplastic polymer processing operations, which contains a header for collecting air, containing the emissions, a duct, a candle filter housing, which is connected to the header by the duct, a candle filter, located in the candle filter housing, which is connected to the duct, a nozzle for rinsing the candle filter with a solvent, which is connected to the candle filter, and a fan for moving the air through the header, duct, candle filter and candle filter housing.

Abstract: Thermoplastic molding materials contain, as essential components,A) 10-80% by wt. of a copolyester based on polyalkylene terephthalates, which contains from 5 to 25% by weight, based on A), of a dimeric acid of 7 to 52 carbon atoms as a co-component, andB) 20-70% by wt. of a mixture of carbonates of metals of the 2nd main group of the Periodic Table of Elements.

Abstract: A herbicidal composition containing one or more substituted 2-aminothiophenes of the formula I ##STR1## where R.sup.1 and R.sup.2 together from a C.sub.4 -alkylene chain to which a benzene ring may be fused,R.sup.3 is --CN or CX--R.sup.6, where R.sup.6 is hydroxyl, C.sub.1 -C.sub.4 -alkoxy or amino,R.sup.4 is hydrogen or a phenyl group which may carry one or two nitro radicals,--PO(OR.sup.8).sub.2, --CX--R.sup.9, --SO.sub.2 R.sup.10, --CX--N(H) --CO--R.sup.8 or --CX--N(R.sup.7)--SO.sub.2 --R.sup.11,whereR.sup.8 is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl groupR.sup.9 is C.sub.1 -C.sub.20 -alkyl, partially or completely halogenated C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.6 -cycloalkyl, or amino, C.sub.1 -C.sub.4 -alkylamino, C.sub.3 -C.sub.8 -cycloalkylamino, phenyl or phenylamino, where the aromatic moiety may carry at least one of nitro and halogen;R.sup.10 is C.sub.1 -C.sub.4 -alkyl or phenyl, which may carry one C.sub.1 -C.sub.4 -alkyl radical;R.sup.

Abstract: Cyan thermal transfer dye mixtures comprise at least one anthraquinone dye whose absorption maximum is at a wavelength of from 600 to 750 nm and also at least one triazolopyridine, pyridone, 1-amidopyrid-2,6-dione, heterocyclic pyridone and/or halogenated quinolone dye.

Abstract: Polyisobutylsuccinic anhydrides having an average molar ratio of succinic anhydride groups to polyisobutyl groups of from 1.05:1 to 1.3:1 are prepared by reacting polyisobutene having an average molecular weight M.sub.w of 600-5000 and containing at least 70% of terminal double bonds with maleic anhydride in a molar ratio of maleic anhydride to polyisobutene of from 1.05:1 to 3:1 at 160.degree.-210.degree. C. in the presence of a catalytic amount of a dicarboxylic acid of 2 to 6 carbon atoms.

Abstract: A process for isolating the calcium salt of ascorbyl 2-monophosphate from aqueous alkaline reaction mixtures as are obtained on reaction of ascorbic acid with a molar excess of phosphorus oxychloride in the presence of a tertiary amine while maintaining a pH of from 12 to 13 during the reaction by means of an aqueous alkali metal hydroxide solution, which comprisesa) starting from a reaction mixture which has been obtained by reacting ascorbic acid with phosphorus oxychloride in the presence of pyridine while maintaining a pH of from 12 to 13 by means of an aqueous potassium hydroxide solution,b) precipitating, as potassium magnesium phosphate, the phosphate ions which have been formed in this reaction by means of magnesium chloride in amounts of about 1 mol per mol of phosphate ions,c) removing the potassium magnesium phosphate,d) distilling the remaining aqueous solution to remove the pyridine together with part of the water,e) reacting the resulting aqueous solution with calcium chloride andf) isolating th

Abstract: A coolant or antifreeze composition has one or more glycols or glycol ethers in combination with water, one or more additives, and an effective amount of one or more perfluoro-gem-diphosphonates as corrosion inhibitors.

Abstract: 2-Amino-4-oxo-4H-benzopyrans I ##STR1## (m=0, 1 or 2; R.sup.1 -R.sup.4 have the meanings stated in the description) and the salts of I, and herbicides which contain 2-(4-hetaryloxy)- and 2-(4-aryloxy)-phenoxyacetic acid derivatives and/or cyclohexenone derivatives as herbicidal active ingredients and 2-amino-4-oxo-4H-benzopyrans I' as antidotes.

Abstract: Process for the preparation of 2,4-hexadiyne-1,6-diol of the formula IHO-CH.sub.2 -CH.sub.2 -C.ident.C-.ident.C-CH.sub.2 -OH (I)by the reaction of diacetylene of the formula IIH-C.ident.C-C.ident.C-H (II)with formaldehyde of the formula IIIH.sub.2 C=O (III),in the presence of a silver catalysts, in which the reaction is carried out in the presence of a polar organic solvent at temperatures ranging from 0.degree. to 150.degree. C. and under pressures ranging from 0.01 to 10 bar.

Abstract: Flexible magnetic recording media consisting essentially of a web-like nonmagnetic substrate, a magnetic layer applied to one main side of the web-like substrate and a backing layer formed on the opposite main side of the substrate from a polymeric binder, at least one filler, at least one auxiliary pigment and a polyolefin having a spherical particle shape.

Abstract: Tryptanthrine derivative of the formula ##STR1## where the rings A and B may be benzofused and/or substituted and X is a radical which is derived from a CH-acidic heterocyclic structure which may have a further tryptanthrine radical or from a hydrazinoanthraquinone or, if one or both of the rings A and B are benzofused and/or substituted by phthaloyl, is furthermore oxygen, are used as colorants.

Abstract: There is now provided a closed cell rigid polyurethane foam having improved flame resistance by empolying a combination of an organo-phosphorus compound having at least two isocyanate reactive hydrogens with a secondary or tertiary mono-halogenated aliphatic hydrocarbon having three to six carbon atoms.

Abstract: The present invention relates to a process for the preparation of flexible, soft polyurethane foams having viscoelastic, structure-borne soundproofing properties in a temperature range of from -20.degree. C. to +80.degree. C. by reactinga) a polyoxyalkylene-polyol mixture containingai) block polyoxypropylene-polyoxyethylene-polyol mixture having a hydroxyl number of from 14 to 65 and containing from 2 to 9% by weight of terminal ethylene oxide units, based on the weight of the polyoxypropylene units, prepared by anionic polymerization, at elevated temperatures, of 1,2-propyleneoxide onto an initiator molecule mixture having a mean functionality of from 2.3 to 2.

Abstract: Copolymers of propylene and a non-conjugated diene or triene of the formula (I): CH.sub.2 =CH(CHR.sup.4).sub.n CR.sup.1 =CR.sup.2 R.sup.3, where R.sup.1 and R.sup.2 are hydrogen or alkyl, but are not both hydrogen; R.sup.3 is alkyl or alkenyl of the formula (II): --(CHR.sup.8).sub.m CR.sup.5 =CR.sup.6 R.sup.7, where R.sup.5 and R.sup.6 are as defined for R.sup.1 (above), but are not both hydrogen; R.sup.7 is alkyl; each R.sup.8 is as defined for R.sup.4 (below); and m is 1 to 5; R.sup.4 is hydrogen or alkyl especially methyl; and n is from 2 to 5, can be made using highly stereospecific Ziegler-Natta polymerisation catalysts. The copolymers have 99.9 to 60, particularly 99.5 to 85, mole % propylene residues and 0.1 to 40, particularly 0.5 to 15, mole % diene residues. The copolymers have unexpectedly low solubility in organic solvents such as xylene and can be cross-linked, vulcanised or cured to give polymers having improved high temperature performance.

Abstract: Liquid-crystalline compounds of the formulae I and II,Z.sup.1 --(X.sup.1 --R.sup.1 --Y--M).sub.m IZ.sup.2 --(X.sup.2 --R.sup.1 --Y--M).sub.n IIwhereZ.sup.1 is the radical of an m-valent alcohol an m-valent acid or certain trivalent triazine derivatives; Z.sup.2 is an n-valent radical of a monocyclic or polycyclic aromatic compound; X.sup.1 is a chemical bond or --CO--; X.sup.2 is --O--, --S--, --CO--O--, --O--CO--, --SO.sub.2 --, --SO.sub.2 --O--, --O--SO.sub.2 --O--, --NR.sup.4 --, --CO--NR.sup.4 --NR.sup.4 --O-- or --CO--N<, where R.sup.4 is H or C.sub.1 -C.sub.8 -alkyl; m and n are 3 to 6; R.sup.1 is a C.sub.2 -C.sub.20 -bridge having 2 to 12 bridging members, which may be interrupted by --O--, --S-- or --NR.sup.4 --, each of these hetero units being separated by at least 2 carbon atoms; Y is a chemical bond, --O--, --S--, --CO--O--, --O--CO--, --NR.sup.4 --, --CO--NR.sup.4 -- or --NR.sup. 4 --CO--; M is a mesogenic group.

Abstract: Liquid-crystalline compounds of the formulae I and II;Z.sup.1 -(X.sup.1 -R.sup.1 -y-M).sub.m IZ.sup.2 -(X.sup.2 -R.sup.1 -Y-M).sub.n IIwhere Z.sup.1 is the radical of an m-valent alcohol an m-valent acid or certain trivalent triazine derivatives; Z.sup.2 is an n-valent radical of a monocyclic or polycyclic aromatic compound; X.sup.1 is a chemical bond or -CO-; X.sup.2 is -O-, -S-, -CO-O-, -O-CO-, -SO.sub.2 -, -SO.sub.2 -O-, -O-SO.sub.2 -O-, -NR.sup.4- , -CO-NR.sup.4 -, -NR.sup.4 -O- or -CO-N<, where R.sup.4 is H or C.sub.1 -C.sub.8 -alkyl; m and n are 3 to 6; R.sup.1 is a C.sub.2 2-C.sub.20 -bridge having 2 to 12 bridging members, which may be interrupted by -O-, -S- or -NR.sup.4 -, each of these hetero units being separated by at least 2 carbon atoms; Y is a chemical bond, -O-, -S-, -CO-O-, -O-CO-, -NR.sup.4 -, -CO-NR.sup.4 - or -NR.sup.4 -CO.sup. -; M is a mesogenic group. These compounds are suitable for the production of optical and electro-optical data carriers and display elements.

Abstract: In a novel process for the reversible or irreversible production of an image by the imagewise action of energy on a recording layer, resulting in a pattern of surface charges which corresponds to the imagewise action of the energy, on the surface of the recording layer, the recording layer used is one which contains or consists of an organic material which solidifies in glassy form, is nonphotoconductive or only slightly photoconductive and has permanent dipoles, wherein the pattern of surface charges is produced, without or almost without formation of free charge carriers, by reversible imagewise orientation of some or all of the permanent dipoles present in the recording layer, with the aid of an electric field applied imagewise.

Abstract: A tape cassette is provided with a housing bearing constriction for the hubs and the support liners are provided with curved or bent liner regions which serve both for guiding the empty hub and for aligning and guiding the windings on the hub, in particular the first tape windings to be wound. Practical embodiments of the liner regions differ from one another in that they have different cross-sectional shapes and different arrangements in the longitudinal direction, tranverse direction or both or have a circular shape.