Abstract: An apparatus for removing plastic residues from parts of plastics processing machines includes a vessel which is closed in air tight manner by an end plate and contains heat transfer fluid. Immersing within the heat transfer fluid is a disk which is operatively connected to a vibrator so as to oscillate for improving the cleaning action. Placed on the end plate is a tubular casing box which is divided into a lower compartment which is essentially sealed off and in which the vibrator is accommodated and into an upper compartment which is open to the atmosphere. At least one pipe traverses the lower compartment for connecting the interior of the vessel with the upper compartment so that vapor and gases may escape through this pipe. A filter is arranged within the upper compartment for absorbing the vapor and gases to prevent the release of obnoxious gases.

Abstract: Impregnating agents are provided consisting essentially of(a) an NCO-prepolymer or NCO-semi-prepolymer which is curable by atmospheric moisture, with an NCO content of 2 to 25% by weight, based on(a1) an organic polyisocyanate and(a2) a compound with at least 2 alcohol hydroxyl groups,(b) a solvent which is inert with respect to isocyanate groups in which the (a1) organic polyisocyanate is a polyisocyanate with exclusively aliphatically or cycloaliphatically bound isocyanate groups and the (a2) polyhydroxyl compound is a polysiloxane of the molecular weight range of 300 to 5000 which has at least 2 alcoholically bound hydroxyl groups.A method of impregnating mineral substrates with such impregnating agents is also provided.

Abstract: The invention relates to water-soluble cationic polymers and to their use in leather dyeing. The polymers preferably have K values of from about 20-45 and are obtained by reacting polyacrylonitrile or acrylonitrile copolymers in the presence of alcohols or polyols, optionally in the presence of a sulfur-containing catalyst.

Abstract: The present invention concerns retanning agents for mineral tanned leathers. They comprise aqueous solutions of organic polymer complex compounds containing carboxyl groups doped with chromium III. The agents are characterized by high chromium depletion and retanning effects.

Abstract: A device for measuring elongation of a structure includes mounts formed at least partially of electrically insulating ceramic material, the mounts having at least two points to be attached to a structure for shifting the mounts relative to each other upon elongation of the structure, and electrically conducting parts disposed on the mounts having electrical properties being influenced by the shifting of the mounts, at least a portion of each of the electrically conducting parts being subjected to mechanical stresses, and at least the portions of the electrically conducting parts being formed of electrically conductive ceramic material.

Abstract: The invention provides an improved adjustable hydraulic apparatus of the type having a hollow piston rod operably associated with a damping piston means which divides the interior of a cylinder member into first and second halves filled with damping fluid. At least one throttle means is operably associated with the damping piston means. The hollow piston rod includes a traverse bore disposed above the damping piston means for the constant passage of damping fluid therethrough. An axially displaceable tension rod is disposed within the interior of the hollow piston rod and is operably associated with an adjusting device. The improvement to the damper apparatus, according to this invention, provides an annular gap defined by the tension rod in combination with the inner surface of the hollow piston rod, which functions as a throttle restriction.

Abstract: An apparatus for cleaning those parts of processing machines of synthetic materials on which synthetic residues adhere includes a container which receives the parts and is airtightly closable. This container is associated to a heating unit which heats a liquid carrier medium to a temperature above the melting point of the synthetic residues adhering to the parts to be cleaned therefrom. The container is tiltable around a horizontal axis between a horizontal charging position and a vertical operating position. Connected to the container is a tank which is located below the container when the apparatus is in the horizontal position, and which accommodates the heat carrier medium. Upon movement of the container and the tank from the horizontal position into the vertical position, the heat carrier medium flows into the container and upon reverse movement flows back into the tank. An overflow determines the maximum filling level of the heat carrier medium in the container.

Abstract: Elastomers reinforced with fibrous composite materials and having improved properties are obtained if the strengthening means used are composite materials based on reinforcing fibres and reactive resins which are coated with adhesion promoters based on polyisocyanates.

Abstract: Coating of geological formations as well as air- and fire barriers is performed by providing aqueous rubber or rubber-like dispersions and spraying the dispersions via separate conduits simultaneously with a dry hydraulic binding medium, by a pressure air onto an object to be coated. An inert filling material can be added to the hydraulic binding medium, and a tenside can be added to the dispersions.

Abstract: By using a packer which is pushed as far over an anchor as the intended length of the moulding, the cavity in a borehole in the region of the bond can be completely filled with a reactive resin. Overhead work is possible even with slowly reacting resins. By using a catalyst on the packer, the reactive resin injected into the borehole behind the packer can be made to harden very rapidly.

Abstract: By using a packer which is pushed as far over an anchor as the intended length of the moulding, the cavity in a borehole in the region of the bond can be completely filled with a reactive resin. Overhead work is possible even with slowly reacting resins. By using a catalyst on the packer, the reactive resin injected into the borehole behind the packer can be made to harden very rapidly.

Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein(a) methyl formate is hydrolyzed,(b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained,(c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid,(d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation,(e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b),(f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrou

Abstract: A process for the manufacture of 4,4'-diphenylmethane diisocyanate and a mixture of diphenylmethane diisocyanate isomers containing a controllable amount of uretdione and hydrolizable chlorine which comprises feeding crude MDI to an evaporator, condensing a head fraction in two stages in the presence of an inert gas, feeding the first stage condensate to a distillation column, producing a mixture of diphenylmethane diisocyanate isomers as an overhead, producing 4,4'-diphenylmethane diisocyanate as a side draw, and condensing each of the overhead and side draw in two stages in the presence of an inert gas.

Abstract: The outer skin of armored earthwork constructions is attached to bands and the traction is transmitted to the ground by friction. The bands are made of a corrosion resistant, high strength weave or netting of reinforced organic, glass or carbon fibres or fibre mixtures and are preferably impregnated with liquid reaction resins such as epoxide, polyurethane or isocyanate resins. It is advantageous to impregnate the bands and then to harden them only after they have been laid.

Abstract: Halogenated 4-trifluoromethyl-4'-nitro-diphenyl-ether compounds of the formula ##STR1## in which R is halogen or methylthio, andX is hydrogen or chlorine,Are outstandingly effective as herbicides, particularly as selective herbicides.

Abstract: A herbicidal composition containing as active ingredients(1) 4-amino-6-tert.-butyl-3-methylthio-1,2,4-triazin-5-one of the formula ##STR1## and (2) 2,6-dichloro-4-trifluoromethyl-4'-cyano-diphenyl ether of the formula ##STR2## preferably in a weight ratio from about 1:0.05 to 1:10. The composition can be used as a total herbicide or, at suitable levels of application, in growing crops as a selective herbicide against particularly resistant weeds.

Abstract: Herbicidal compositions containing as active ingredients (1) 3-benzthiazol-2-yl)-1,3-dimethylurea, which has the formula ##STR1## and (2) 2,6-dichloro-4-trifluoromethyl-4-'-cyano-diphenyl ether, which has the formula ##STR2## alone or in admixture with a solid or liquid or liquefied gaseous diluent or carrier, exhibit outstanding synergistic herbicidal activity and selectivity.

Abstract: New (trifluoromethylphenoxy)-phenylureas of the formula: ##STR1## wherein R is hydrogen or methyl andn and m, which may be identical or different, are each 0, 1, 2, 3 or 4, but only n and m may be 0 if the trifluoromethyl group is in the 3-positionAnd have strong herbicidal properties.

Abstract: N-(1,2,4-Triazin-5-on-4-yl)-glycine compounds of the formula ##STR1## in which R.sup.1 is alkyl, alkoxy, alkylthio or alkylamino,R.sup.2 is alkyl, cycloalkyl, phenyl or substituted phenyl,R.sup.3 is hydrogen, alkyl, alkenyl or alkynyl andR.sup.4 is hydroxyl, alkoxy, alkythio, amino, alkylamino or dialkylamino,Possess outstanding selective herbicidal properties.

Abstract: New 6-sec.-butyl-1,2,4-triazin-5(4H)-one compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each hydrogen, orR.sup.1 and R.sup.2 together represent alkylidene or substituted alkylidene of the formula: ##STR2## wherein R.sup.3 is hydrogen, alkyl or cycloalkyl, and R.sup.4 is alkyl, alkenyl, cycloalkyl, cycloalkenyl, aralkyl, aralkenyl, optionally substituted aryl or an optionally substituted heterocyclic radical, orR.sup.3 and R.sup.4 together with the carbon atom shown from a 5-membered to 7-membered ring, andY is sulfur, NH or NCH.sub.3 ;are outstandingly active herbicides.