Abstract: A binding agent for molded bodies and molding compositions produced by prereacting a mixture of 5 to 60% by weight of lignin or a lignin fraction produced by the Organosolv process and 40 to 95% by weight of a phenol novolac resin and subjecting the latter to high shear forces in a kneader or extruder and optionally mixing the same with a curing agent useful in molding compositions and high temperature-stable molded products such as refractory products, friction coatings, textile fleeces and carbon or graphite materials.

Abstract: In the production of 9,9-bis-(4-hydroxphenyl)-fluorene by condensation by fluorenone and phenol in a molar ratio of 1:4 to 1:8 at 30.degree. to 90.degree. C. in the presence of gaseous hydrogen chloride and .beta.-mercapto-propionic acid as catalyst, the improvement comprising mixing the completed reaction mixture with a polyalkylene glycol, distilling excess phenol from the mixture, and mixing the distillation residue with a solvent miscible with the polyalkylene glycol, recovering the crystallized product, suspending the crystallized product in water and heating the suspension to obtain highly pure 9,9-bis-(4-hydroxyphenyl)-fluorene as white crystals.

Abstract: Microorganisms with the ability to cleave enantioselectively 5-substituted hydantoins to L-alpha-amino acids are cultivated in a known manner in a batch preparation. By one-time dosage of anondegradable enzyme inductor of the structure ##STR1## (where R.sub.1, R.sub.2 and X are specifically defined) an increased enzyme activity combined with an increased reaction rate is achieved.

Abstract: A bituminous building sheeting which is compatible with hot mopping bitumen and bituminous cold adhesives and whose covering mass is modified with APP and IPP. The mass, homogenized under high shear forces is cooled off after the application of 180.degree. to 200.degree. C. at a cooling speed of not more than 120 K/min. Polymer spherulites form on the surface thereby which improve the adhesiveness and prevent oily components from exuding out of the bitumen.

Abstract: Polysulfide sheeting is prepared by mixing a curable polysulfide oligomer or polymer, carbon black, and manganese dioxide as a hardening catalyst; forming the composition into a sheet; and curing the sheet at an elevated temperature. The sheeting has unusually high short-term heat resistance, so it will not lose its watertightness when coated with hot-laid asphalt at 240.degree. C. It has better resistance to ultraviolet light than conventional polysulfide sheeting, and good penetration and compression set resistance. The sheeting can be laminated to a reinforcing layer, if desired. A continuous waterproofing layer can be formed by laying pieces of the sheeting in overlapping relation, placing an uncured polysulfide rope between the overlapping edges of adjacent pieces of sheeting, and curing the rope, thus joining the pieces to form an integral sheet. Such waterproof layers can be incorporated into paving for bridges, roofs, and other structures.

Abstract: A process for the preparation of 2,6-dialkyl-naphthalenes comprising selectively alkylating naphthalene or 2-alkyl-naphthalene with alkylating agent in the presence of a zeolite catalyst at 250.degree. to 345.degree. C. which dialkyl-naphthalenes are useful for the preparation of naphthalene 2,6-dicarboxylic acid used to produce high-quality polyesters or polyamides.

Abstract: A roofing strip with a very wide range of plasticity and based on elastomer-modified bitumen is prepared by covering a support with a bitumen/rubber mixture in the ratio of 17/3-19/1 and irradiating the strip at a rate between 6 and 16.times.10.sup.4 Gy.

Abstract: A method for the production of a carbon fiber precursor from coal tar pitch comprising extracting coal tar pitch at elevated temperatures and pressures with a mixture of a supercritical gas and an entraining agent to obtain a solution free of quinoline-insoluble components, recovering from the solution by lowering the pressure and/or raising the temperature to obtain at least one fraction selected from the group consisting of quinoline-soluble fraction and toluene-soluble fraction, treating the said fraction(s) at 380.degree. to 450.degree. C. under a non-oxidizing atmosphere at atmosphere pressure until 40 to 65% by volume of the product is converted into pitch containing mesophase, extracting the latter pitch with a mixture of supercritical gas and an entraining agent to remove isotropic pitch and recovering isotropic pitch with a mesophase content of at least 75% by volume, a pyridine-insoluble matter content of 20 to 50% by weight, a mean molecular weight of 900 to 1200 and a melting point of 330.degree.

Abstract: A non-woven textiles comprising a web of organic fibers bonded together by a binder applied to the fibers as a powdered mixture of a non-heat reactive phenolic resin and at least one thermoreactive condensation resin selected from the group consisting of phenolic resins, epoxy resins and amino resins and then fused and a method of producing said textiles.

Abstract: A novel method of chlorinating the alkyl side chains of a nitrogen containing heterocyclic comprising reacting an alkyl substituted heterocycle with trichloroisocyanuric acid at temperatures of 20.degree. to 200.degree. C. to obtain the same in high yields.

Abstract: Radiation cross-linkable binding agents formed by reacting first an epoxy component with more than one epoxy group per molecule with at least one carboxylic acid in a molar ratio 1 of epoxy group per 0.5 to 0.9 carboxyl groups and second reacting the said first reaction product with at least one unsaturated isocyanato carbamate ester prepared by reacting a compound containing at least two isocyanate groups with an ester of an acid selected from the group consisting of acrylic acid, methacrylic acid and cyanacrylic acid containing hydroxyl groups useful in electronics and electrotechnology for layering systems and cast resin materials.

Abstract: An improved moisture-stable phenolic resin binder with calcium ions from the catalyst complexed with the phenolic resin and a process for its preparation and laminate boards with the said binder as the binding agent.

Abstract: In a process for the preparation of 2,5-diloweralkyl-1,4; 3,6-dianhydrosorbitols by reacting 1,4;3,6-dianhydrosorbitol with an alkylating agent in an alkaline aqueous-organic solvent solution, the improvement comprising using a tertiary alkanol as the organic solvent.

Abstract: The present invention relates to a process for the preparation of zinc 2-mercaptopyridine-N-oxide in a readily filterable, washable and easily suspendable form which comprises reacting an aqueous solution of an alkali metal salt of 2-mercaptopyridine N-oxide with an aqueous solution of a water soluble zinc salt at a temperature of 35.degree. to 100.degree. C. in the presence of an at least partially water soluble organic solvent to form a precipitate of zinc 2-mercaptopyridine-N-oxide, recovering the said crystals and optionally comminuting the crystals.

Abstract: An improved process for the production of glass and mineral fiber products bonded with a phenolic resin in which an aqueous phenol-formaldehyde resin is applied to the inorganic fiber as the bonding agent which is formed with calcium hydroxide as condensation catalyst and the mixture is thermally cured, the improvement comprising prior to processing the aqueous phenol-formaldehyde resin is adjusted to a pH of 7.5 to 11 by addition of a base and sulfate ions are added in an amount of 80 to 200% of the stoichiometric amount required for bonding the calcium ions whereby the calcium ions are converted into a water-soluble complex stable for at least three hours without any precipitation and the products produced thereby.

Abstract: A binder material is disclosed formed from furfuryl alcohol suitable for the preparation of molded bodies and cores for molding for the foundry industry based on the following composition:40-60 weight percent higher molecular weight furfuryl alcohol formaldehyde condensation product28-40 weight percent lower molecular weight furfuryl alcohol formaldehyde condensation product12-25 weight percent 2,5-bis-hydroxymethylfuran0-8 weight percent furfuryl alcohol.

Abstract: An apparatus for applying adhesive or adhesive pastes in strips on construction or building surfaces comprising a heated hopper container for adhesive mounted on a traveling positive displacement pump, a manifold at the pump outlet provided with a plurality of moveable outlet openings and connected to separate conveying tubes and application nozzles, the positive displacement pump having a widened intake cross-section or a feed screw with a widened in-take cross-section and the hopper having a cylindrical upper section and a lower section conical in only one plane with a heatable screen grid in the transition point between the upper and lower hopper sections, the feed screw and the pump being at least partially heated, the drive shaft of the pump being provided with a safety crank and thermostatically controlled heating element and the hopper being provided with a closable by-pass carrying 2 or more individually or jointly, adjustable horizontally and vertically and elastically rotable slot nozzles mounted sl

Abstract: A corrosion protective sheet for adhesion to steel sheets which is made from elastomers and natural resin modified bitumen and which contains up to about 10% organic and or inorganic fibrous material. The sheet is coated on the underside with a melt adhesive and on the upper side with a bitumen resistant anti-block material which provides a solid sheet at a temperature under 90.degree. C. No separation sheets are needed and the adherence of the sheet on the steel surface to be protected is improved and the upper surface is rendered resistant to penetration.

Abstract: Stable phenolic-modified hydrocarbon resins with an OH number which is 4.5 or greater are resonably priced and toxicologically generally regarded as safe resins for the development of leucopigments, especially for the development of colors in pressure sensitive recording materials. The softening point may be varied by copolymerization with multivalent phenolic compounds and vinyl phenol within the range of 70.degree.-90.degree. C.

Abstract: The invention relates to a process for the continuous wet or wet-catalytic purification of waste gases by adsorption and chemisorption of the gaseous pollutants on activated carbons with simultaneous desorption of these pollutants or their reaction products. The process is carried out at 100 to 800 times gravity acceleration in a centrifugal filter, in the rotor of which a bed of fine-grain or fibrous activated carbon is arranged. The waste gas passes through this bed in codirectional or counter-current flow to the wash liquid. The pollutants are washed out with the desorbent flowing from the center outwardly.