Alzchem Trostberg Gmbh

Degussa Aktiengesellschaft

Skw Trostberg Aktiengesellschaft

Alzchem Ag

Thomas Güthner

Jürgen Sans

Franz Thalhammer

Hans-Peter Krimmer

Benedikt Hammer

Jürgen Bezler

Thomas Gastner

Martin Eberl

Helmut Hintermaier

Björn Antelmann

Sylvia Huber

Doris Krammer

Bernhard Graml

José Martinez

Werner Sturm

José MARTÍNEZ Ramos

Alexander Meindl

Hubertus Gehrmann

The present invention relates to a method for preparing N-(aminoiminomethyl)-2-aminoacetic acid comprising N-(aminoiminomethyl)-2-aminoacetic acid in a thermodynamically metastable crystal modification.

Process for the preparation of a metastable crystal modification of N-(aminoiminomethyl)-2-aminoethanoic acid (IV)

The present invention relates to a novel crystal modification of N-(aminoiminomethyl)-2-aminoacetic acid, crystal mixtures, and a process for preparing said crystal modification and said crystal mixtures.

Process for the preparation of a metastable crystal modification of n-(aminoiminomethyl)-2-aminoacetic acid (III)

The invention relates to aqueous solutions containing cyanamide, particularly storage-stable aqueous solutions containing cyanamide which contain a stabilizer and a surfactant.

Storage-stable solutions containing cyanamide

The present invention relates to a new crystal modification of N-(aminoiminomethyl)-2-aminoacetic acid as well as a method for producing this crystal modification.

Metastable crystal modification and method for producing the same (I)

A method of treating wooden parts is described in which a) the wooden parts are impregnated with an aqueous cyanamide solution and subsequently b) the impregnated wooden parts, where appropriate after drying, are subjected to a heat treatment of 130 to 250&#xb0; C. Here it has surprisingly emerged that impregnation with cyanamide even in small amounts has a significantly positive influence on the performance properties of the treated wooden parts, such as high hardness, low water absorption and very good weathering stability, for example. Moreover, only small amounts of a toxicologically and environmentally unobjectionable impregnating agent are needed in order to obtain these advantageous properties.

Method for treating wooden parts

Physiological strengthening agents in the form of nutritional supplements, feed additives or in cosmetic preparations in the non-medicinal field of application, as well as plant stimulating agents is the use of guanidine compounds of the general formula (I)  or their salts, especially creatinol, creatinol-O-phosphate or one of their salts with aspartic acid, ascorbic acid, succinic acid, fumaric acid, acetic acid or phosphoric acid. Rand Rcan be organic or inorganic compounds, such as, phosphate, sulfate, acetyl, formyl, methyl, ethyl or propyl. The compounds are as nutritional supplements for, e.g., human being in the fields of education, sports, reconvalescence or geriatrics They can also be used as animal feed additives.

Use of guanidine compounds as physiological strengthening agents in the form of nutritional supplements, animal feed additives, in cosmetic preparations and as plant stimulants

A description is given of the use of asymmetrically substituted urea derivatives of the general formula (I) where Rand Reach independently are a linear or branched aliphatic hydrocarbon radical having 1 to 4 carbon atoms as accelerators in combination with dicyandiamide as latent hardener for epoxy resin systems based on unhalogenated or halogenated bisphenols of type A or F and also based on resorcinol or tetrakisphenylolethane. The advantages of the inventively proposed accelerator/hardener combination are, for example, the excellent reactivity and very good storage stability. Moreover, the mechanical properties of the resins cured accordingly are likewise outstanding.

Substituted urea accelerator with dicyandiamide for epoxy resin systems

A process is described for preparing 3-amino-4,4,4-trifluorocrotonic esters of the formula (I) or the E/Z isomers or tautomeric forms thereofwhere Rand Rare each independently hydrogen, an optionally substituted linear C&#x2013;C-alkyl radical or an optionally substituted benzyl radical and Ris methyl or ethyl, which comprises With the aid of this two-stage process, the 3-amino-4,4,4-trifluorocrotonic esters can be prepared in high yields without significant by-products.

Method for producing 3-amino-4,4,4-trifluorocrotonic acid esters

A process is described for preparing 4-methylpyrimidine by reacting a 4,4-dialkoxy-2-butanone with a formamidine salt, optionally in the presence of a solvent or diluent, at temperatures of from 80 to 180&#xb0; C. In this way, 4-methylpyrimidine can be obtained in a substantially simpler manner and at the same time in higher yields than are possible by means of existing processes.

Method for producing 4-methyl pyrimidine

A curing agent for the production of low gloss powder coatings based on epoxy resins consists essentially of a mixture of the components a) 2-imidazoline derivative having a melting point of &gt;60.degree. C. and b) cyanuric acid as well as, if desired, anticaking agents or/and stabilizers. The low gloss powder coatings produced with these curing agents have the desired low degrees of gloss and good adhesive strengths, they form smooth and uniform surfaces and show no signs of yellowing even after long stoving times.

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Trostberg, Germany

Thomas Güthner