Basf Se Corporation

Jens Hartig

Manfred Dargatz

Stephan Amthor

Peter Nesvadba

Karl Haeberle

Stefan Becker

Roelof Balk

Helmut Steininger

Sebastian Enck

Konrad Roschmann

Oihana Elizalde

Kamesh R Vyakaranam

Alexandre Terrenoire

Meik Ranft

Michael Gross

Frank A Reinhold

Maria Teresa Hechavarria Fonseca

Bas Lohmeijer

Christoph Tonhauser

Tobias Reinhard Umbach

Michael Groß

Frank Reinhold

Kamesh Vyakaranam

The invention relates to aqueous polymer dispersions, comprising a water insoluble polymer P in the form of dispersed polymer particles, which is obtainable by free radical aqueous emulsion polymerization of ethylenically unsaturated monomers M, which comprise a) at least one monomer M1 which exhibits two ethylenically unsaturated moieties which are connected by a linker which comprises a disulfide moiety, and b) at least one monoethylenically unsaturated monomer M2, which has a low water solubility. The invention also relates to processes for preparing such an aqueous polymer dispersion, to solid polymer compositions in powder form, obtainable by drying such polymer dispersions, to the use of such polymer dispersions in a coating material, adhesive or sealant and to a methods of coating a surface of a substrate which comprises applying an aqueous coating composition, which contains such an polymer dispersion.

Aqueous polymer dispersion

The present invention relates to aqueous binder compositions which are based on aqueous multistage polymer dispersions, to the uses of such binder compositions, and to coating compositions comprising them. The aqueous binder composition comprises: a) a polymer P in the form of an aqueous multistage polymer dispersion of dispersed polymer particles, where the polymer particles comprise a first polymer having a glass transition temperature of at least 30&#xb0; C. and being made of ethylenically unsaturated monomers M-A, and a second polymer having a glass transition temperature of not more than 20&#xb0; C. and being made of ethylenically unsaturated monomers M-B, where the ethylenically unsaturated monomers M-A and M-B together comprise: i. 85% to 99.45% by weight, preferably 87.5% to 97% by weight and in particular 90% to 95.5% by weight, based in each case on the total amount of monomers M-A+M-B, of at least one neutral, monoethylenically unsaturated monomer M1 having a solubility in water of at most 50 g/l at 25&#xb0; C. and 1 bar; ii. 0.5% to 10% by weight, preferably 1% to 7.5% by weight and in particular 1.5% to 6.5% by weight, based in each case on the total amount of monomers M-A+M-B, of at least one neutral, monoethylenically unsaturated monomer M2 having a solubility in water of at least 100 g/l at 25&#xb0; C. and 1 bar; iii. 0.05 to 0.5% by weight, preferably 0.15% to 0.5% by weight and in particular 0.3% to 0.5% by weight, based in each case on the total amount of monomers M-A+M-B, of one or more monoethylenically unsaturated monomers M3 having an acidic group; and iv. optionally from 0 to 5% by weight and in particular from 0 to 4.5% by weight, based in each case on the total amount of monomers M-A+M-B, of one or more monomers M4 having at least two non-conjugated ethylenically unsaturated double bonds; and b) at least one carbodiimide having at least two carbodiimide moieties, which are bound to an aliphatic carbon atom.

Aqueous binder compositions

The present invention relates to a new process for preparing polyurethane-polyacrylate hybrid dispersions, and to the resulting dispersions and their use.

Process for preparing polyurethane-polyacrylate hybrid dispersions

The present invention relates to coating compositions which comprise dispersions of polymers obtained by a two-stage procedure, to processes for preparing them, and to their use.

Polymer dispersions

The present invention relates to coating compositions which comprise dispersions of polymers obtained by a multistage procedure, to processes for preparing them, and to their use in corrosion protection.

Polymer dispersions for corrosion control

An aqueous binder composition comprising: a) a water-insoluble polymer (P) in the form of dispersed polymer particles having a glass transition temperature in the range from &#x2212;50&#xb0; C. to 50&#xb0; C., obtained by free-radical polymerization of ethylenically unsaturated monomers M, the monomers M comprising:

Binder compositions comprising boric acid or boric acid salt

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Ludwigshafen, Germany

Jens Hartig