Abstract: The present disclosure is in the field of coating formulations, in particular for coating formulations to make substrates such as paper, plastic or cardboard, heat sealable, water repellent and oil repellent. The present disclosure therefore relates to a coating formulation comprising a polymer produced by radical polymerisation and wherein said polymer comprises a backbone with one or more monomers that comprise hydrophobic side chains. The present disclosure further relates to a heat sealable, water repellent and oil repellent substrate with said coating formulation and to a process for making such a substrate.

Abstract: A process for applying a heat sealable layer to a substrate in which the substrate is provided with a coating composition containing a cyclic imide, which can be a maleimide, an itaconimide, a citraconimide or a 2,3 dialkyl maleimide. Preferably the coating composition is brought on the substrate from a water borne formulation in which the coating composition containing a cyclic imide is dispersed in the water phase and the coating composition containing a cyclic imide is a copolymer of cyclic imides and vinylic co-monomers, preferably a co-polymer of cyclic imides and styrene. The dispersed product in the water phase has a particle size between 20 and 500 nm, preferably between 30 and 200 nm, and the particles have a core-shell structure.

Abstract: The present invention relates to an aqueous polymer dispersion comprising a copolymer of anhydride monomer units and vinyl monomer units, which copolymer has been subjected to an imidization reaction. The present invention further relates to a method for the production and use of such a dispersion.