For the formulation of silicone resin emulsion paints according to DIN 18363, the silicone resins are used in the form of aqueous emulsions. These emulsions may be solvent-free or solvent-based, depending on how they are produced. Solvent-free emulsions are prepared by emulsion polycondensation of liquid silicone resin or by emulsifying a silane/siloxane/silicone resin mixture. Solvent-based emulsions are prepared by dissolving solid silicone resin in organic solvents and then emulsifying the solutions. Silanes, siloxanes and siliconates are also classified as silicone resins because they form silicone resin networks on mineral surfaces. These products are referred to collectively as silicone masonry protection agents.

 

The excellent results obtained with silicone resin emulsion paints for more than forty years now are due to the use of silicone resin as binder. Attempts to replace three-dimensionally crosslinking silicone resins with low-cost, simple chain-forming silicone fluids will inevitably fail in the long run, since these products are entirely devoid of any pigment-binding power.