POLYMER OH 5

Polymer OH 5 contains polydimethylsiloxanes with terminal silanol groups which are used in condensation-curing silicone elastomers. It has the characteristics of universal binders for moisture-curing silicones and it can be combined with all common silane crosslinker chemistries. It can be cured with usual condensation crosslinkers 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 5 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.