GENIOSIL® GF 98
GENIOSIL® GF 98 is an alkoxysilane with an amino-functional group. It´s a clear, colorless to light yellowish liquid with a characteristically aromatic odor. The compound reacts with moisture under hydrolysis of the alkoxy groups and forms silanols, which reacts further forming siloxanes. As a bifunctional amine, GENIOSIL® GF 98 can also interact with numerous organic polymers and thus function as a molecular bridge between organic and inorganic substrates.
1. General processing information
GENIOSIL® GF 98 is very readily soluble in alcohols, esters and ketones. It is only slightly soluble in n-hexane. It may react slowly with ketones and aldehydes to form imines. With other alcohols excepting methanol, an autocatalytic exchange reaction forms mixed alkoxysilane bonds. In neutral water GENIOSIL® GF 98 reacts under hydrolysis and condensation of the silanol groups. The water has an approximate pH of 9 - 10.
In silane crosslinking formulations GENIOSIL® GF 98 may be added to the formulation as an adhesion promoter. Processing is effected by means of standard mixing methods. Usually, about 1 - 2 wt % silane is added to the formulation.
Fillers are treated either with pure GENIOSIL® GF 98 or a solution thereof. It may be necessary to pretreat the substrate with water.
In an alternative procedure referred to as "blending", GENIOSIL® GF 98 is added directly to the polymer - either before the organic materials is compounded with the filler or at the same time.
However, this is only possible if the polymer is compatible with GENIOSIL® GF 98.
Important applications of GENIOSIL® GF 98 is the use as an adhesion promoter in sealants, adhesives and coatings, and as a coupling agent for inorganic particles, pigments or fillers.