Dynamit Nobel Aktiengesellschaft

Huels Aktiengesellschaft

Huls Aktiengesellschaft

Hermann Peeters

Wilhelm Vogt

Burkhard Standke

Hartwig Rauleder

Hans-Joachim Kotzsch

Claus-Dietrich Seiler

Jurgen Amort

Christoph Theis

Horst Hanisch

Uwe Prange

Reinhard Matthes

Ute Klapdor

Disclosed are organosilane polycondensation products prepared by hydrolysis of an hydrogen salt of an aminosilane compound or by hydrolysis of an aminosilane followed by reaction with an alkyl salt. The compounds are useful in forming stable aqueous solutions and as adhesion promoters between inorganic and organic surfaces.

Organosilane polycondensation products

Organofunctional silanes, especially epoxy-functional silanes or mixtures of epoxy-functional silanes and alkylsilanes, are used as adhesion promoters for ester-curing resin binders for the foundry industry.

Adhesion promoters for ester-curing resin binders for the foundry

Disclosed is a casting resin of reduced viscosity based on methacrylic acid esters with a high content of aluminum hydroxide as filler containing a mixture of at least one organosilicon compound with a functional group, at least one silicic acid ester, and at least one organic metallic acid compound of metals of Groups IVB and/or VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or by alkylene groups. The casting resins of the invention have improved working qualities. Plastic objects and moldings manufactured from these resins have decidedly improved use properties.

Aluminum hydroxide filled casting resins on a basis of methacrylic acid

A method is disclosed whereby uracil is obtained from alkali formyl acetic acid alkyl esters by reacting such esters with thiourea and then with hydrogen peroxide without isolating the intermediates, and then separating the uracil by precipitation with acids.

Method of preparing uracil

Enol ethers of the formula ##STR1## and/or the corresponding acetals can be obtained from acyloxymethylene compounds of the corresponding structure by reaction with the corresponding alcohol, in the presence of acid catalysts if desired.

Method of preparing acetals and enol ethers from acyloxymethylene

2,4-Dihydroxypyrimidine (uracil) is prepared from alkali formyl acetic acid ester by reaction with thiourea, heating with chloroacetic acid, and heating with acids.

Method of preparing 2,4-dihydroxypyrimidine

2-Alkoxy-4-aminopyrimidines, having if desired a substituent in position 5, are prepared from 4-amino-2-carboxymethylthiopyrimidines by conversion with alcohols in the presence of bases.

Method of preparing 2-alkoxy-4-aminopyrimidines

A process for the preparation of a .beta.-alkoxyacrylonitrile of the formula

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Niederkassel, Germany

Hermann Peeters