Page 214 - Handbook of Adhesion Promoters

9.25 Sealants 207

9.25 SEALANTS

The following commercial adhesion promoters are suggested for the use in sealants: Geni-
osil GF 62, 92, 93, 95, and 96; Silquest A-1106, and Visiomer TMPTMA. They contain
the following active components: propylidynetrimethyl trimethacrylate and amino- and
vinyl-silanes.
The adhesion promoter GE SS4120 consists of 5-10 wt% ethyl silicate 40, 30-60
wt% methanol, and 30-60 wt% ethanol. This primer increases adhesion of silicone seal-
1
ants to silicon, glass, and aluminum.
Sealants sometimes adhere to the backing material, resulting in three-sided adhesion,
2
and this causes a decrease in joint performance. The contamination of foam with primer
should be avoided otherwise the sealant-to-foam adhesion is increased and the joint life-
2
time will be decreased.
The adhesion of a polyurethane-based sealant was increased by a combination of
3
aminotitanate and epoxysilane used for the production of water-based primer.
REFERENCES
1 Kersey, L; Ebacher, V; Bazargan, V; Wang, R; Stoeber, B, Lab. Chip, 9, 1002-4, 2009.
2 Hutchinson, AR; Iglauer, S, Int. J. Adh. Adh., 26, 555-66, 2006.
3 Yao, H; Rosenberg, S; Blank, N, US6511752, Sika Corporation, Jan. 28, 2003.