AEROSIL® fumed silica in adhesives and sealants based on silane-modified-polymers (SMP)

Adhesives and sealants based on SMP Polymers consist mainly of MS Polymers, STPU or STPE-polymers, fillers, thixotropes, reinforcing agents, silanes and drying agents. These systems are also called hybrid-adhesives and sealants. Only hydrophobic AEROSIL® grades are recommended as thixotropes and reinforcing agents for theses systems, because SMP-adhesives and sealants cure via moisture and silane functionality of the polymers.
Especially AEROSIL® R 972, AEROSIL® R 202 and AEROSIL® R 208 are suggested as thickening agents and thixotropes as well as reinforcing agents for filled systems, while AEROSIL® R 972, AEROSIL® R 106, AEROSIL® R 805 and AEROSIL® R 812 S are recommended for transparent SMP-adhesives and sealants.

The structure-modified, hydrophobic fumed silica AEROSIL® R 8200 is suggested as excellent reinforcing agent both for filled and for transparent SMP-adhesives and sealants.

Recommended AEROSIL® grades for SMP-adhesives and sealants:
SMP-adhesives&sealants	AEROSIL® grades	Wt.-%	Incorporation methods
Filled	AEROSIL® R 972 AEROSIL® R 106 AEROSIL® R 202 AEROSIL® R 208	1-6 1-6 1-6 1-6	Planetary-dissolver Planetary-mixer Dissolver with scraper
Transparent	AEROSIL® R 972 AEROSIL® R 974 AEROSIL® R 106 AEROSIL® R 805 AEROSIL® R 812 S	1-12 1-12 1-12 1-12 1-12	Planetary-dissolver Planetary-mixer Dissolver with scraper
High-strength	AEROSIL® R 8200 AEROSIL® R 9200	5-30 5-30	Planetary-dissolver Planetary-mixer Dissolver with scraper

AEROSIL R 8200 in transparent MS Polymer sealants

AEROSIL® R 8200 improves both tensile strength and elongation at break of transparent MS Polymer^TM sealants!