The Polymer OH series contains polydimethylsiloxanes with terminal silanol groups which are used in condensation-curing silicone elastomers. The polymers are available in different viscosity levels between 100 and 400 000 mPas. Other viscosities are available upon request.
Please note that Polymer OH 0.1 acts as an inhibitor and can therefore be used for delaying the curing process.
Typical Applications
Polymer OH can be cured with usual condensation cross-linkers such as alkoxy silanes, acetoxy silanes, oxime silanes and enoxy silanes in connection with catalysts (e. g. tin catalysts, Catalyst TD 18).
Especially the low-viscosity types can be used as reactive diluents for the viscosity adjustment in a mixture with higher viscosity polymers.
The crosslinking reaction occurs in connection with water. In conventional single-component formulations, this water can be introduced through humidity. However, Polymer OH can also be formulated as two component systems. In that case, the required water is added through the second component. Substantially higher curing rates and depths are achieved in this way.
Especially the low-viscosity types can be used as reactive diluents for the viscosity adjustment in a mixture with higher viscosity polymers.
The crosslinking reaction occurs in connection with water. In conventional single-component formulations, this water can be introduced through humidity. However, Polymer OH can also be formulated as two component systems. In that case, the required water is added through the second component. Substantially higher curing rates and depths are achieved in this way.
Benefits at a glance
- Universal binders for moisture-curing silicones
- Can be combined with all common silane crosslinker chemistries