Polymer OR 501 is a special silicone polymer for non-staining condensation-curing silicone formulations. This polymer is recommended in particular for low-modulus sealants and adhesives when the use of silicone oils as plasticizers is not advised, e. g. in natural stone applications.
Typical Applications
Especially the field of marble and natural stone applications involves the risk of silicone oils being absorbed by these fine-pored substrates (“blotting-paper effect”). This produces discolorations in the edge zones of the glued joint which may be worsened by adhering dust. This effect can be avoided by using Polymer OR 501.
Polymer OR 501 is also suitable for applications in the electronics industry as free silicone oils may have a negative effect here as well.
In formulations, Polymer OR 501 substitutes the base polymer (hydroxylterminated siloxane) and the silicone plasticizer. Curing of this polymer is achieved by using common neutral silane crosslinkers (e.g. alkoxy silanes). It is not recommended to use this polymer in tin-catalyzed acetoxy-cured formulations.
Polymer OR 501 is also suitable for applications in the electronics industry as free silicone oils may have a negative effect here as well.
In formulations, Polymer OR 501 substitutes the base polymer (hydroxylterminated siloxane) and the silicone plasticizer. Curing of this polymer is achieved by using common neutral silane crosslinkers (e.g. alkoxy silanes). It is not recommended to use this polymer in tin-catalyzed acetoxy-cured formulations.
Benefits at a glance
- Polymer OR 501 is an architecturally plasticised hydroxyfunctional silicone for natural stone sealants
- This polymer can be formulated without adding any free oil to obtain highly elastic formulations