Basf Se Corporation

Ulrich Tromsdorf

Sebastian Roller

Frederic Lucas

Rabie Al-Hellani

Karl Haeberle

Rolf Dersch

Roelof Balk

Uwe Dittrich

Manfred Dargatz

Bas Lohmeijer

Quirin Maximilian Kainz

Stefan Kirsch

Bastiaan Lohmeijier

Phosphorus-containing aqueous polymer dispersions and the use thereof as binders in coating formulations.

Aqueous polymer dispersions

Water-emulsifiable isocyanates with improved properties

Binder systems for high-gloss coatings and processes for producing them are provided, where the binder systems are prepared by preparing an aqueous polymer dispersion by radically initiated aqueous emulsion polymerization using defined first and second polymerization stages wherein the weight ratio of the sum of the total amounts of first polymerization stage monomers A1 to C1 (total monomer amount 1) to the sum of the total amounts of second polymerization stage monomers A2 to C2 (total monomer amount 2) is in the range 5:95 to 70:30, the amount of chain transfer agent in the second polymerization stage is selected such that the resulting overall polymer has a weight-average molecular weight of &#x2265;15 000 and &#x2264;50 000 g/mol, and the amount of the dispersing assistant is &#x2264;3.0 wt %, based on the sum of total monomer amount 1 and total monomer amount 2 (total monomer amount).

Binder system for high-gloss coatings

Coating compositions containing an aqueous polymer dispersion having improved resistance toward chemicals. The aqueous polymer dispersion is prepared by polymerizing a first composition containing at least one ethylenically unsaturated group (monomers) by radical aqueous emulsion polymerization and then, in the presence of a product mixture from the previous polymerization, polymerizing a second composition containing at least one ethylenically unsaturated group (monomers) by radical aqueous emulsion polymerization. The coating compositions are such that the difference between a glass transition temperature of a polymer prepared from the first polymerization and a glass transition temperature of a polymer prepared from the second polymerization is at least 50&#xb0; C.

Use of aqueous polymer dispersions for improving resistance to chemical influences

Growing community of inventors

Plankstadt, Germany

Ulrich Tromsdorf