Abstract: A pressure sensitive adhesive comprising an aqueous polymer dispersion which comprises at least one polymer with monomeric units from a monomeric composition comprising (by weight): a) 60 to 95% of 2-ethylhexyl acrylate; b) 0.1 to 15% of butyl (meth)acrylate; c) 0.5 to 5% of a vinyl aromatic monomer; d) 0.1 to 4% of at least one ethylenically unsaturated acid; e) 0 to 20% of a vinylic ester of C2-C8 carboxylic acid; f) optionally, a monomer different from a), b), c), d) and e); g) at least 0.005% with respect to the total weight of monomers a)+b)+c)+d)+e)+f) of at least one chain transfer agent; the sum of a)+b)+c)+d)+e)+f) being equal to 100%, wherein said monomeric composition does not comprise any C1-C2 alkyl (meth)acrylate.

Abstract: The present invention relates to an adhesive composition comprising an aqueous dispersion of polymer particles which have been subjected to a post-polymerization treatment with an excess of peroxide. The invention also relates to a process for preparing the adhesive composition, to a process for increasing the adhesion of an adhesive composition, to a process for producing an adhesive article and to an adhesive article obtained with the adhesive composition.

Abstract: The invention relates to a pressure sensitive adhesive comprising an aqueous polymer dispersion which comprises at least one polymer with monomeric units from a monomeric composition comprising (by weight): a) 60 to 95% of 2-ethylhexyl acrylate; b) 0.1 to 15% of butyl (meth)acrylate; c) 0.5 to 5% of a vinyl aromatic monomer; d) 0.1 to 4% of at least one ethylenically unsaturated acid; e) 0 to 20% of a vinylic ester of C2-C8 carboxylic acid; f) optionally, a monomer different from a), b), c), d) and e); g) at least 0.005% with respect to the total weight of monomers a)+b)+c)+d)+e)+f) of at least one chain transfer agent; the sum of a)+b)+c)+d)+e)+f) being equal to 100%, wherein said monomeric composition does not comprise any C1-C2 alkyl (meth)acrylate.

Abstract: The invention relates to an aqueous polymer dispersion which comprises: a) an aqueous polymer dispersion comprising grafted rubber polymeric particles from rubber polymer being selected from natural or synthetic rubber, b) an aqueous polymer dispersion with polymeric particles of a second polymer comprising monomeric units derived from a monomeric composition b) comprising: b1) a (meth)acrylate of a linear or branched alcohol in C4 to C10 or a mixture of such (meth)acrylates, said (meth)acrylate having Tgb1 lower than ?30° C., b2) optionally, at least one comonomer having Tgb2 higher than ?30° C., with said grafted rubber polymeric particles being grafted in an aqueous dispersion by a part of said monomeric composition b) as defined above. The invention covers also a specific process of preparation of said dispersion, an adhesive composition comprising said dispersion, the use of said dispersion in pressure sensitive adhesives and the resulting adhesive.

Abstract: The invention relates to an aqueous polymer dispersion comprising: a) an aqueous polymer dispersion comprising grafted rubber polymeric particles from rubber polymer being selected from natural or synthetic rubber, b) an aqueous polymer dispersion with polymeric particles of a second polymer comprising monomeric units derived front a monomeric composition b) comprising: b1) a (meth)acrylate of a linear or branched alcohol in C4 to C10 or a mixture of such (meth)acrylates, said (meth)acrylate having Tgb1 lower than ?30° C., b2) optionally, at least one comonomer having Tgb2 higher than ?30° C., with said grafted rubber polymeric particles being grafted in an aqueous dispersion by a part of said monomeric composition b) as defined above. The invention covers a process of preparation of said dispersion, an adhesive composition comprising said dispersion, the use of said dispersion in pressure sensitive adhesives, and the resulting adhesive.

Abstract: The present invention relates to aqueous polymeric dispersions comprising emulsion polymerization polymeric particles having a monomeric composition comprising at least one monomer selected from acrylic, vinylic or allylic monomers and further comprising a mixture of surfactants comprising: a) phosphate surfactant selected from alkoxylated alkyl phosphate ester acids or salts, preferably alkoxylated alkyl phosphate monoester-diacids or salts or from alkoxylated alkyl diphosphate diester-monoacids or salts or a mixture of alkoxylated alkyl phosphate monoester-diacids or salts and alkoxylated alkyl diphosphate diester-monoacids or salts, and at least one of the following surfactants: b) surfactant selected from alkoxylated alcohol sulfate metal M salts, c) surfactant selected from dialkyl C4-C18 diester and/or C4-C18 monoesters of sulfosuccinate metal M salts, and the polymer of said polymeric particles having a glass transition temperature Tg, as determined by DSC at a second passage at a heat rate of 20° C.

Abstract: The invention relates to an aqueous polymer dispersion comprising: a) an aqueous polymer dispersion comprising grafted rubber polymeric particles from rubber polymer being selected from natural or synthetic rubber, b) an aqueous polymer dispersion with polymeric particles of a second polymer comprising monomeric units derived front a monomeric composition b) comprising: b1) a (meth)acrylate of a linear or branched alcohol in C4 to C10 or a mixture of such (meth)acrylates, said (meth)acrylate having Tgb1 lower than ?30° C., b2) optionally, at least one comonomer having Tgb2 higher than ?30° C., with said grafted rubber polymeric particles being grafted in an aqueous dispersion by a part of said monomeric composition b) as defined above. The invention covers a process of preparation of said dispersion, an adhesive composition comprising said dispersion, the use of said dispersion in pressure sensitive adhesives, and the resulting adhesive.