Stahl International B.v.

Cht R. Beitlich Gmbh

Thomas Fischer

Juergen Muenter

Kurt Willmer

The invention relates to a method for producing aqueous polyurethane-polyurea dispersions, where A) first a polyurethane prepolymer containing NCO groups is produced by reacting A1) polyisocyanates with A2) polymeric polyols and/or polyamines having number-average molecular weights of more than 400 to 8,000 g/mol, A3) possibly low-molecular-weight compounds having number-average molecular weights of 17-400 g/mol selected from the group comprising mono- and polyalcohols, mono- and polyamines, and amino alcohols, A4) isocyanate-reactive, ionically or potentially ionically hydrophilic compounds and/or isocyanate-reactive non-ionically hydrophilic compounds, A5) isocyanate-reactive compounds, which contain at least one Cto Calkyl group or Cto Calkenyl group, and A6) isocyanate-reactive compounds, which contain at least one polysiloxane group, and B); the NCO groups of the prepolymer that are not yet free are reacted with isocyanate-reactive monoamines, polyamines, hydrazine, and/or hydrazides, dimensioned in such a way that a calculated ratio of the isocyanate-reactive NH groups to the NCO groups of 0.7 to 1.2 is achieved.

Aqueous polyurethane-polyurea dispersions

A thickener for textile printing which is a polymer dispersion and includes at least one polymer selected from the group consisting of (A) at least one polymer derived from monomers having an ethylenically unsaturated double bond, (B) at least one ethylenically unsaturated carboxylic acid ester, (C) at least one ethylenically unsaturated carboxylic acid anhydride, and (D) at least one ethylenically unsaturated carboxylic acid amide; and a synthetic carrier medium comprised of at least one biodegradable component which may have varying respective biodegradabilities and which is selected from the group consisting of at least one ester which is at least one of an ester of synthetic origin and an ester of natural origin and which is liquid at room temperature and below.

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Beuren, Germany

Thomas Fischer