Peter Greven UK

In today's construction industry many building materials are made hydrophobic. These mainly include fining, light, adhesive, insulating and redevelopment plaster. This technique is, however, also applied at other materials, e.g. for special concrete, grouting compound, gypsum plaster board and natural stone.

In this range of application metallic soaps have got an important position with an increasing share. Metallic soaps owe this outstanding position in building protection to their high specific surface, as well as to their high water-repellent effect. At making them hydrophobic the surface is coated over the total cross section, which guarantees that the mass will be waterrepellent for several years. The steam diffusion is not affected.

The effectiveness, however, depends on an intensive admixture of metal stearates in the building materials. Here the reactive hydrophobic substances are an improvement. They are used in the form of soluble soap - mostly sodium oleate. The water-repellency effect is delayed by the reaction with calcium from the building material.

During the last few years combination products have been used more and more, which guarantee a good incorporation and quick hydrophobic effect.

The Peter Greven Fett-Chemie has adapted the properties, with respect to application technology, of soaps and metallic soaps to the requirements of the construction industry. The result is a wide range of special products with a broad range of application, which in this information are represented in the form of a summary. On request we can provide you detailed information on the individual products. If not noted down otherwise, the indicated dosing quantities refer to the dry substance. They, however, represent approximate values, which may be different from the values in practice, e.g. owing to high proportions of binding agents or larger quantities of lightweight aggregates in the mixtures.

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