Th. Goldschmidt Ag

Bayer Aktiengesellschaft

Ulrich Holtschmidt

Gunter Schwarzmann

Arnold Laqua

Klaus Lurssen

Gotz Koerner

Burghard Gruning

Jurgen Fock

Gerd Rossmy

Eckehard Schamberg

Dieter Hellwig

Gunter Bertelmann

Klaus Sasse

Christian Weitemeyer

Klaus Naumann

Dietmar Schedlitzki

Harald Rau

Manfred Priesch

Goetz Koerner

Wilhelm Ahrens

Rudolf Huettinger

Silicic acid or silica particles having initially surface-located hydroxyl groups are modified by replacing at least partially the hydroxyl groups by an organic group to impart the particles with emulsion-breaking and foam-destroying properties. Processes for preparing the modified particles are also disclosed.

Silica or silicic acid particles whose surface located hydroxyl groups

Particles less than 100 .mu.m in size and modified by hydrophilic and hydrophobic groups wherein the hydrophilic and hydrophobic groups are distributed anisotropically on the surface of the modified particles. Processes for the preparation of such particles and the use of such particles as surface active products, especially for stabilizing or destablizing emulsions and foams as well as for tertiary oil recovery.

Particles, modified at their surface by hydrophilic and hydrophobic

Compounds having the formula: ##STR1## in which R.sup.1 is the hydrocarbon radical of a fatty acid with 16 to 18 carbon atoms, isostearic acid or a mixture thereof,

Polyoxyalkylene ethers of glycerin or 1,2-propanediol, esterified with

Organopolysiloxanes with Bunte salt groups having the formula ##EQU1## the Bunte salt groups being linked to a silicon atom by way of a carbon atom and in which

Organopolysiloxanes with Bunte salt groups, their synthesis and use for

The invention relates to a process for the preparation of heat-curable resins, usable especially as electrically insulating resins, by the reaction of alkoxy siloxanes of the formula ##STR1## in which OR.sup.1 represents an alkoxy group of primary or secondary aliphatic alcohols with 1 to 4 carbon atoms,

Process for the preparation of heat-curable silicone resins usable

The invention relates to a hardenable adhesive, which contains as effective components at least one polyol and one polyisocyanate and/or their prepolymers as well as additionally conventional additives, such as, accelerators, gluing auxiliaries, pigments and/or fillers. It is characteristic of the inventive adhesive that it contains, as a polyol, the reaction product of a novolak of average molecular weight from 300 to 1200 with an oxirane of the general formula ##STR1## in which R.sup.1 is hydrogen, or an optionally halogenated hydrocarbon group with 1 to 4 carbon atoms or the --CH.sub.2 OR.sup.2 group, in which R.sup.2 represents an alkyl or an alkenyl group, the R.sup.1 group within the polymeric molecule being the same or different, there being added, on the average, 1 to 7 moles of the oxirane per hydroxyl group of the novolak, and the polyol and the polyisocyanate being present in such a ratio that 0.95 to 1.25 isocyanate groups of the polyisocyanate correspond to one hydroxyl group of the polyol. The inventive adhesives are liquid, adhere well to plastic surfaces and have a high peel strength. They are resistant to the effects of water and moisture.

Hardenable adhesive

Guanidinium salts having the formula ##STR1## wherein R.sup.1 and R.sup.2 are linear alkyl residues,

Guanidinium salts, processes for their manufacture as well as

A method for preparing thermosettable urea-formaldehyde resins having a urea to formaldehyde molar ratio of 1:1 to 1:1.5 wherein urea and formaldehyde are first reacted in an aqueous solution at a molar ratio of 1:1.5 to 1:4 in the pH range between 7.5 to 10, and then condensing the reactants in a pH range from 4 to 6 to a precipitation number of 1:1.5 to 1:10, thereafter adjusting the pH to 7 to 10 and adding the remaining urea to obtain a molar ratio of 1:1 to 1:1.5 and continuing the reaction until a precipitation number of 1:0.5 to 1:3 is obtained. The products obtained have a uniform molecular weight and good penetration properties when used to impregnate supporting webs for coating wood-based panels.

Process for the preparation of thermosettable urea-formaldehyde resins

A method for the preparation of hardenable urea-formaldehyde resins for use in impregnating and coating carrier webs wherein urea and formaldehyde are first reacted in the presence of an aminosulfonic acid and ammonia, additional aminosulfonic acid is added and the mixture is further reacted to adjust the viscosity of the solution and then additional ammonia and urea are added to the reaction mixture and the mixture is further reacted to adjust the viscosity thereof, and wherein a polymer formed from the monomers of the formula ##STR1## in which R.sup.1 =H or CH.sub.3,

Process for the preparation of solutions of urea-formaldehyde resins for

This invention relates to a microbiocidal composition comprising a carrier and a microbiocidally effective amount of 1,3-di-n-decyl-2-methyl-imidazolium chloride or bromide.

1,3-Di-N-decyl-2-methyl-imidazolium chloride or bromide and

Novel quaternary imidazolium compounds and the use of quaternary imidazolium compounds as plant growth regulants and the preparation of certain quaternary imidazolium derivatives.

Agents for regulating plant growth

Novel imidazole derivatives, the use of certain imidazole derivatives as plant growth regulants and the preparation of certain new imidazole derivatives.

This invention relates to a compound or mixture of compounds having the general formula ##STR1## in which R is hydrogen or an alkyl group containing 8 to 18 carbon atoms, at least one R being alkyl, and x is 0 or 1. The invention also relates to a process for making the novel compound or mixture thereof, a process for killing microbes using the novel compound or mixture thereof, and a microbiocidal composition using the novel compound or mixture thereof.

Alkylated polyamines, their preparation and use as microbiocides

A method for the preparation of solutions of hardenable urea-formaldehyde resins which are suitable for impregnating paper supports used for coating wood-based panels wherein urea and formaldehyde are first mixed in specific mole ratios and reacted for a period of time to a given viscosity, an aminosulfonic acid is then added and the pH is controlled with ammonia to further react the mixture and finally, additional ammonia and urea are added to produce the final viscosity product wherein a portion of the initial urea is replaced with a melamine which results in significant improvements in the temperature and pH control of the process.

Method for the preparation of hardenable urea formaldehyde resins

This invention relates to novel compounds having the formula: ##STR1## wherein R.sup.1 is a straight-chain alkyl group having 8 to 18 carbon atoms, R.sup.2 is a straight-chain alkyl group having 1 to 3 carbon atoms, R.sup.3 is a straight-chain alkyl group having 8 to 16 carbon atoms, and X is chlorine or bromine. The invention further relates to novel microbiocidal compositions containing the novel compounds, and also to a process for preparing the novel compounds.

Growing community of inventors

Essen, Germany

Ulrich Holtschmidt