Rutgerswerke Aktiengesellschaft

Karl Jellinek

Rolf Muller

Bert Meier

Arno Gardziella

Gerhard Wisomirski

Jurgen Zehrfeld

Rolf Herzog

Josef Suren

Peter Adolphs

Ulrich Grundke

Karl-Heinz Schwieger

Winfried Reisel

Berthold Meier

Rudi Oellig

Horst Duda

Gunter Reinsch

A prepreg comprising a porous support material impregnated with a binder consisting essentially of an epoxy resin, a bisphenol novolac hardener and 0.4 to 2.0% by weight based on the total binder of an imidazole and a method of preparing laminates of composite materials therefrom.

Novel prepregs

In a composite produced by hot pressing multilayer duroplastic prepregs of reinforcing materials impregnated with a duroplastic resin system, the improvement comprising at least one layer of an epoxy resin prepreg and at least one layer of a phenolic resin prepreg are pressed together, the composite having low fume density, increased non-flammability and good solvent and moisture resistance useful for production of structural components.

Composite materials of multilayer duroplastic prepregs

A process for the preparation of at least one member of the group consisting of monoglycidyl and polyglycidyl compounds comprising reacting a member of the group consisting of mono- and polyvalent phenols, aromatic amines and aromatic carboxylic acids with an epihalohydrin substantially free of halogenated hydrocarbons.

Polyglycidyl ethers from purified epihalohydrin

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.

Non-woven textiles

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.

Radiation cross-linkable binding agents

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.

Novel calcium hydroxide catalyzed phenolic resin binder and method

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.

Production of inorganic fiber products

A binder for cellulose fiber reinforced board material comprising a mixture of:

Binder for cellulose fiber reinforced board material

Boiling water and weather resistant cellulose fiber reinforced board

An unsaturated, branched hydroxyester resin produced by the esterification of a saturated or unsaturated aliphatic or aromatic dicarboxylic acid with a mixture comprising about 75 - 97 mole percent of a bivalent alcohol and about 25 - 3 mole percent of a multifunctional alcohol having at least three hydroxy groups, said hydroxyester resin having a hydroxyl number of about 30 - 110, is employed in the production of quick hardening powder enamels capable of forming plastic coatings.

Method of applying powder coatings of unsaturated branched hydroxyester

A condensation product of a polyepoxide with a monoalcohol or monocarboxylic acid is reacted with a monoisocyanatoallyl or methallyl carbamate to form a novel compound which can be mixed with a vinyl monomer to form a radiation hardenable lacquer composition.

Growing community of inventors

Iserlohn-Letmathe, Germany

Karl Jellinek