Hydrophobizing agent for mineral materials

A process for producing a hydrophobizing agent comprising

• i) a polyion complex comprising at least one polycation (i.1) and at least one polyanion (i.2), where the molar ratio of polycation:polyanion in the polyion complex is ≥1;
• ii) a silicone compound composition;
• and
• iii) a carrier composition;
• wherein the process comprises the steps:
• a) Providing a polyion complex (i) in an aqueous solution;
• b) Providing a carrier composition (iii);
• c) Mixing the aqueous solution of the polyion complex (i) as per (a) with carrier composition (iii) as per (b) to give a first mixture;
• and
• d) Adding a silicone compound composition (ii) which optionally contains a surfactant composition and/or a UV dye composition to the first mixture obtained in (c) to give a coated pulverulent carrier composition of the hydrophobizing agent.

A process for hydrophobizing materials which comprise mineral binders, comprising the steps

• A) Providing a binder composition comprising one or more mineral binder(s);
• B) Providing a hydrophobizing agent comprising a polyion complex (i) comprising at least one polycation (i.1) and at least one polyanion (i.2), wherein the molar ratio of polycation:polyanion in the polyion complex is ≥1;
• a silicone compound composition (ii);
• a carrier composition (iii);
• C) Mixing the binder composition as per (A) and the hydrophobizing agent as per (B) to give a mixture of binder composition and hydrophobizing agent;
• and
• D) Adding water (w) to the mixture of binder composition (b) and hydrophobizing agent, as obtained in (C) and mixing the components;
• to give a hydrophobized material comprising mineral binders.