Deutsche Texaco Aktiengesellschaft

Martin Cherubim

Friedrich Josten

Karl-Heinz Heinemann

Elmar Wilms

Hans Arendsen

Faisal AboDagga

Dragomir Simic

Karl-Heinz Renkes

Rainer Striso

Heinz-Ulrich Zupancic

A process for preparing bonding agents for light-colored weatherproof wood materials, based on alkali-condensed phenol-formaldehyde mixed condensates.

Process for preparing bonding agents for light-colored weatherproof wood

An improved method of manufacturing shaped objects from cement wherein cement is wetted with an aqueous solution of an acetone-formaldehyde resin, optionally including a water-soluble alcohol, the wet mixture molded to the desired shape and then cured preferably at a temperature within the range of 30.degree. C to 100.degree. C, wherein the bending strength of the finished product is improved by incorporating a metal soap in the composite prior to molding the wet mixture. Also disclosed is an improved composition of matter comprising Portland cement, an acetone-formaldehyde resin and a metal soap, and optionally containing an inorganic aggregate.

Method for manufacturing heat-cured molded articles from cement

Molding compositions or masses comprising sand and a two-component binder system are prepared. These two-component binders consist essentially of 1) polyisocyanate and 2) a low molecular weight polymethylol produced by the controlled condensation of narrow mole ratios of acetone and formaldehyde under alkaline reaction conditions followed by acidification and removal of sufficient water to produce a minimum solid content of at least 95%. These molding compositions cure so fast that they may be taken off the mold five minutes after having been cured with an amine curing agent, and reach a substantial bending strength within minutes of curing compared to prior art compositions which achieve comparable bending strength only after a period of as long as one hour.

Molding compositions or masses suitable for manufacturing foundry molds

This invention comprises curing a polyepoxide composition in the presence of, as curing agent, 0.03-1 mole per 1 epoxide equivalent of 1,3,6,8-tetra azo-tricyclo-[4,4,1.sup.1,6.1.sup.3,8 ] dodecane thereby forming a cured compound and recovering said cured compound.

Process for preparing cured epoxide polymers

Improved resin solutions derived from phenol-acetone-formaldehyde co-condensates useful as binder in weather-proof wood materials and a process for the production of said solutions.

Process for the production of binders for weather-proof wood materials

Supported olefin conversion catalysts are activated by a method which comprises calcining the catalyst, impregnating the calcined catalyst with an alcoholic solution of an alkali metal salt, an alkali metal base or an alkali metal alcoholate and then recalcining the catalyst.

Method of activating a supported olefin conversion catalyst

Flame-resistant foam plastics are prepared by mixing with an aqueous alkaline condensed phenol-formaldehyde resin solution an expanding agent such as hexane and an acidic curing agent after which the mixture is foamed and permitted to cure. Useful acidic curing agents, comprise mixtures of a strong inorganic or organic acid, a glycol and phosphoric acid.

Process for the production of flame-resistant phenolic resin foam

Conversion of olefins using improved catalysts

Substituted cyclohexene-2-ones are prepared by reacting a cyanoethylated ketone, such as 1,1,1-tri-beta-cyanoethyl acetone, in a polar solvent, e.g., methanol or water, in the presence of a catalyst. The compounds formed are useful in the production of cyclic amino acids, esters, hydroxy acids, as modifiers and as hardeners for phenolic and epoxide resins and as additives for lubricating oils.

Process for production of 3-hydroxy-cyclohexene-2-ones

Wood materials are prepared, characterised by improved resistance to hot water and by high weather resistance, by combining wood products with a phenol-aldehyde resin and alkylene carbonate hardener, the latter being incorporated in said resin as an aqueous formaldehyde solution.

Process for the production of wood materials having high resistance to

Alkyl-substituted unsaturated .delta.-lactams are obtained by contacting monocyanoethylated ketones with an aqueous acid solution and permitting them to react. Alkyl-substituted unsaturated .delta.-lactams of this invention are valuable intermediate products useful for organic synthesis in the production of pharmaceuticals and plastics.

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Martin Cherubim