System and method for generating a foam

A method for generating a foam, in particular a cross-linked foam, more in particular a cured foam, comprising the steps of

• in a first container providing a liquid component A comprising at least one compound X, optionally at least one compound Y, and at least one surfactant, wherein one molecule of compound X comprises a plurality of first functional groups and one molecule of compound Y comprises a plurality of second functional groups, wherein the first functional groups in compound X are capable of undergoing a reaction with the second functional groups in compound Y in presence of a catalyst, thereby creating a bond between molecules of compounds X and Y;
• in a second container providing a liquid component B comprising at least one catalyst for the reaction between the first and the second functional groups, and at least one compound Y, if liquid component A contains no compound Y;
• providing a pressurized gas in the gaseous state from a pressurized gas supply;
• feeding component A into a first mixer, preferably a dynamic mixer, comprising a pressure-tight container and first mixing means inside the first container;
• feeding the pressurized gas in the gaseous state into the first mixer, thereby creating a positive pressure in the first mixer;
• dispersing the pressurized gas in the gaseous state into component A by means of the first mixing means, thereby generating a dispersion;
• transferring the dispersion into a second mixer comprising second mixing means inside the second mixer, preferably a static mixer;
• optionally allowing the dispersion to partly or substantially completely expand;
• simultaneously feeding component B into the second mixer;
• mixing component B with the dispersion, thereby starting the reaction and generating a reaction mixture in form of a cross-linking foam;
• releasing the reaction mixture from the second mixer;
• allowing the reaction mixture to expand and react, thereby generating a cross-linked and/or cured foam.