| SILRES® BS 5137 is a very efficient aqueous water dilutable emulsion of a reactive polydimethylsiloxane. It is used to impart water repellency to glass wool (fiber glass) or stone wool bound with phenolic resin. It can also be used for expanded minerals such as perlite or vermiculite, or expanded clay aggregates. Special features: Compared to SILRES® BS 5136 the viscosity was reduced by approx. 80 %, which significantly improves the feeding and dilution process. Once sprayed onto the substrate, in comparison to other emulsions of reactive polydimethylsiloxanes SILRES® BS 5137 shows an especially high thermal stability in the manufacturing process of the thermal insulating material. Application: SILRES® BS 5137 has been developed and optimized to be compatible with phenolic resin binders and tolerates without surplus of ammonia varying processing and formulating conditions. It is compatible and can be mixed with most phenolic resins, no side reactions or precipitations are observed. Based on the large variety of phenolic resins used plus further specific additives, however, a specific compatibility test in each plant is necessary. As the shelf life of the various mixtures depends largely on the formulation e. g. on the dilution of the emulsion it is recommended to apply the binder mixture without delay. Information provided by Wacker Chemie AG. |
