Basf Se Corporation

Basf Aktiengesellschaft

Lars Wittenbecher

Michael Henningsen

Matthias Maase

Georg Degen

Ulrich Griesbach

Gregor Daun

Hermann Pütter

Dieter Flick

Ulrich Arnold

Erhard Jacobi

Juergen Schillgalies

Joerg-Peter Geisler

Manfred Doering

Manfred Döring

Heinrich Lang

Gunter Scherhag

Reinhold Goth

Yingzhong Shen

The present invention provides a mixture comprising at least three hardener components a1), a2), and b), the ratio of hardener component a1) to a2) being in the range from 0.1 to 10:1, and hardener component b) being present at 5% to 55% by weight, based on the mixture, a process for preparing this mixture, the use of the mixture of the invention for curing epoxy resins, the use of the mixture of the invention with epoxy resins as adhesives, and an epoxy resin cured with the mixture of the invention.

Mixtures of amines with guanidine derivatives

The present invention provides a blend comprising one or more epoxy resins and a mixture which comprises 0.3 to 0.9 amine equivalent, per equivalent of epoxide of the epoxy resin used, of a hardener component a) and as hardener component b) a compound of the formula I, a process for preparing this blend, the use of the blend of the invention for producing cured epoxy resin, and an epoxy resin cured with the blend of the invention.

Blends comprising epoxy resins and mixtures of amines with guanidine derivatives

The present invention provides a process for producing moldings, the curing of the mold being carried out using a blend comprising one or more epoxy resins and a mixture, the curing component a) being used within the mixture in the range from 0.3 to 0.9 amine equivalent per equivalent of epoxide of the epoxy resin used, and the hardener component b) being a compound of the formula I.

Process for preparing moldings using mixtures of amines with guanidine derivatives

The preparation of epoxy resin compositions which comprise glycidyl ethers comprising cyclohexyl groups and have a low oligomer content is carried out by distillation of compositions which are obtainable by ring hydrogenation of compounds of the general formula (I) where

Epoxy resin compositions and process for preparing them

The use of 1,3-substituted imidazolium salts of the formula I in which

Catalyst for curing epoxides

1,3-substituted imidazolium salts of the formula I are used as latent catalysts for curing compostions comprising epoxy compounds: in which: R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms; R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring; X is the anion of a phosphorus oxyacid, and n is 1, 2 or 3.

The use of 1,3-substituted imidazolium salts of the formula I in whichR1 and R3 independently of one another are an organic radical having 1 to 20 C atoms,R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, andX is a thiocyanate anionas latent catalysts for curing compositions comprising epoxy compounds.

A process for preparing crystalline hydroxylamine-O-sulfonic acid by

Process for preparing crystalline hydroxylamine-O-sulfonic acid

Copper (I) formate complexes of general formula LCu(HCOO).x COOH are decomposed in order to separate metallic copper, wherein x is a number from 0 to 10, n amounts to, 2, 3 or 4 and the n ligands L represent, independent of one another, one of the following ligands: a phosphane of formula RRRP; a phosphite of formula (RO)(RO)(RO)P; an isocyanide of formula R&#x2014;NC; an alkene of general formula RRC&#x2550;CRR; or an alkyne of general formula RC&#x2550;CR; wherein R, R, Rand Rrepresent, independent of one another, hydrogen, a linear or branched, optionally partly or fully fluorinated alkyl, aminoalkyl, alkyoxialkyl, hydroxialkyl, phosphinoalkyl or aryl radical having up to 20 carbon atoms, with the exception of triphenylphosphino-copper (I) formate and 1,1,1-tris(diphenylphosphinomethyl)ethane-copper (I) formate.

Copper(I) formate complexes

A process for preparing N,N-dihydrocarbylhydroxylamines of the general formula (I) where R, R, Rand Rare selected independently from among hydrogen, aliphatic, cycloaliphatic, heteroaromatic and aromatic radicals, or Rand Rand/or Rand Rare joined to form a ring, and not more than one radical among R, R, Rand Ris hydrogen, which comprises the steps a) reaction of hydroxylamine HNOH or a salt of hydroxylamine with a compound of the general formula (II) or (III) where R, R, Rand Rare as defined in formula (I), b) hydrogenation of the compound formed in step a) in the presence of a catalyst, c) further reaction of the compound formed in step b) with a compound of the general formula (II) or (III) and hydrogenation of the reaction mixture in the presence of a catalyst and d), if appropriate, reaction of the salt of the dihydrocarbylhydroxylamine formed in step c) with a base.

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Duesseldorf, Germany

Lars Wittenbecher