AEROSIL® fumed silica for unsaturated polyester and vinyl ester resins

Many applications for unsaturated polyester resins and vinyl ester resins need to have a certain viscosity level and thixotropic behavior. The pure resins do not show a thixotropic behavior on their own and usually are on a low viscosity level. Therefore thickening agents and thixotropes have to be used. The most important and customary used thickening agent and thixotrope is fumed silica. AEROSIL® fumed silica is added to UP and VE resins for viscosity control and to achieve the desired thixotrope effect. Furthermore AEROSIL® fumed silica works as an anti-settling agent and can be used in transparent applications.
For more detailed information, we recommend reading Technical Bulletin Fine Particles No. 54.

AEROSIL® for Resins



Technical Bulletin 54: AEROSIL® Fumed Silica in Unsaturated Polyester Resins and Vinyl Ester Resins  (pdf, 635 KB)

This bulletin is a guide for the use of AEROSIL® Fumed Silica as a thixotrope in unsaturated polyester resin and vinyl ester resin applications such as gelcoats and laminate resins. Topics discussed within include the mechanism of thickening, dispersion methods, and the influence of silica properties such as BET surface area on performance. Some standard guide formulations and basic rheological data are also provided as part of the document.


Technical Information 1279: Successful use of AEROSIL® fumed silica in liquid systems  (pdf, 759 KB)

The Technical Information No. 1279 is a brochure that describes how to incorporate AEROSIL® fumed silica into liquid systems.


Further information:

More products by Evonik for resins: