Aug 21, 2020
Apart from the widely introduced silicone and polyurethane systems, also hybrid prepolymers based on silane terminated polyurethanes (STP-U) offer themselves for the preparation of sealants and adhesives. They combine the benefits of a polyurethane base structure with a silane based curing mechanism.
ADVANTAGES OF USINg CALCINED NEUBURG SILICEOUS EARTH
- Very low moisture content and very low moisture absorption even under humid conditions
- Significant lower viscosity at higher deformation, thereby easier application
- Viscosity at low deformation / yield point variably adjustable
- High hardness
- Increased tensile strength of up to 14 MPa
- Marked increase of lap shear strength, more than 16 MPa are possible
- Potential for reducing rheological additive fumed silica
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