Evonik Operations Gmbh

Mona Seyfried

Markus Hallack

Berend-Jan De Gans

Stefan Silber

Michael Fiedel

Sascha Herrwerth

Florian Düllmann

A process for producing an aqueous polyorganosiloxane hybrid resin dispersion includes emulsifying a polyorganosiloxane hybrid resin solution of a polyorganosiloxane hybrid resin and an organic or semi-organic solvent with an emulsifier solution that includes at least one emulsifier based on a partly hydrolysed polyvinylacetate and removing the organic or semi-organic solvent.

Aqueous polyorganosiloxane hybrid resin dispersion

An aqueous polyorganosiloxane hybrid resin dispersion includes at least one polyorganosiloxane hybrid resin and at least one emulsifier based on partly hydrolysed polyvinylacetates. The dispersion has a solids content of 30.0% by weight-70.0% by weight, preferably 45.0% by weight-55.0% by weight, based on the polyorganosiloxane hybrid resin dispersion, and the residual solvent content is <6.0% by weight, preferably <2.5% by weight, more preferably <1.0% by weight, based on the polyorganosiloxane hybrid resin dispersion.

A curing agent mixture is for coatings that cure at room temperature. The curing agent mixture can include (A) 10-60% by weight, preferably 20-60% by weight, more preferably 30-50% by weight, of a polysiloxane, (B) 40-90% by weight, preferably 40-80% by weight, more preferably 40-70% by weight, of an amino-functional alkoxysilane and (C) 1-10% by weight, preferably 2-7% by weight, more preferably 3-5% by weight, of a guanidine compound. The stated amounts of components (A), (B), and (C) add up to 100% by weight and are based on the curing agent mixture.

Curing agent mixture

An aqueous polyorganosiloxane hybrid resin dispersion can include at least one polyorganosiloxane hybrid resin, at least one amphiphilic emulsifier, and water.

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Essen, Germany

Mona Seyfried