Aqueous dispersions

The present invention relates to an aqueous dispersion obtained by a process comprising the steps of (a) preparing an acidic copolymer (A) by radical copolymerization of monomers comprising: (a1) at least one unsaturated fatty acid, (a2) at least one ethylenically unsaturated monomer containing at least one acid group or group capable of forming an acid group, (a3) at least one other ethylenically unsaturated monomer different from (a1) and (a2), (b) neutralizing totally or partially the acid groups of copolymer (A) and dissolving it in water, (c) copolymerizing in the solution obtained at step (b) a monomer mixture different from the monomer mixture of step (a) to form a copolymer (B) as well as blends based on such dispersions, especially in combination with oxidatively drying alkyds.

Low molecular weight polyesterpolyols, their preparation and use in coatings

Low molecular weight polyester polyols, their production and use in coating compositions

Neue acrylatpolymerisate, deren grundlage polyesterharze oder polyester-oligomere sind, deren herstellung und verwendung in beschichtungsmitteln

Aqueous dispersions

The present invention relates to an aqueous dispersionobtained by a process comprising the steps of (a) preparing an acidic copolymer (A) by radical copolymerization of monomers comprising: (a1) at least one unsaturated fatty acid, (a2) at least one ethylenically unsaturated monomer containing at least one acid group or group capable of forming an acid group, (a3) at least one other ethylenically unsaturated monomer different from (a1) and (a2), (b) neutralizing totally or partially the acid groups of copolymer (A) and dissolving it in water, (c) copolymerizing in the solution obtained at step (b) a monomer mixture different from the monomer mixture of step (a) to form a copolymer (B)as well as blends based on such dispersions, especially in combination with oxidatively drying alkyds.

Dispersiones acuosas

Una dispersión acuosa obtenida mediante un procedimiento que comprende las etapas de: (a) preparar un copolímero ácido (A)) que tiene un índice de acidez cuando se pone en contacto con el agua de al menos 140 mg de KOH/g mediante copolimerización por radicales de monómeros que comprenden: (a1) al menos un ácido graso insaturado, (a2) al menos un monómero etilénicamente insaturado que contiene al menos un grupo ácido o un grupo capaz de formar un grupo ácido cuando se pone en contacto con el agua, (a3) al menos otro monómero etilénicamente insaturado diferente de (a1) y (a2), (b) neutralizar todos o al menos parte de los grupos ácidos del copolímero (A) y disolverlos en agua para formar un copolímero (A) total o parcialmente neutralizado, (c) copolimerizar en la solución obtenida en la etapa (b) al menos una mezcla de monómeros diferente de la mezcla de monómeros de la etapa (a) para formar un copolímero (B).

Niedermolekulare polyesterpolyole, deren herstellung und verwendung in beschichtungsmitteln

Verfahren zur gewinnung von ubichionen

Die Erfindung betrifft ein Verfahren zur Gewinnung von Ubichinonen. Das Verfahren dient der selektiven und nahezu vollstaendigen Gewinnung von Ubichinonen aus mikrobiellen Biomassen. Die gewonnenen Ubichinone koennen vorwiegend in der pharmazeutischen Industrie eingesetzt werden. Das Verfahren beruht auf der Hochdruckextraktion einer ubichinonhaltigen Bakterienbiomasse mit Kohlendioxid und einem Selektivloesungsmittel. Aus dem beladenen Extraktionsmittel wird ein 2 bis 10 Ma.-% Ubichinone enthaltender Extrakt abgeschieden.

Aqueous dispersions

The present invention relates to an aqueous dispersionobtained by a process comprising the steps of (a) preparing an acidic copolymer (A) by radical copolymerization of monomers comprising: (a1) at least one unsaturated fatty acid, (a2) at least one ethylenically unsaturated monomer containing at least one acid group or group capable of forming an acid group, (a3) at least one other ethylenically unsaturated monomer different from (a1) and (a2), (b) neutralizing totally or partially the acid groups of copolymer (A) and dissolving it in water, (c) copolymerizing in the solution obtained at step (b) a monomer mixture different from the monomer mixture of step (a) to form a copolymer (B)as well as blends based on such dispersions, especially in combination with oxidatively drying alkyds.