CAS No.: 121177-93-3

Properties: Thanks to the increased rate of hydrolysis and condensation due to the alpha-effect, using GENIOSIL® XL 32 to modify the surface of inorganic fillers or pigments or in the production of moisture cured pipes and cables leads to substantially faster production processes and, in some cases, to greatly simplified treatment procedures (e.g. by making catalysts unnecessary). Used in plastics, fillers treated in this way exhibit improved dispersibility. Such mineral-filled plastics also show improved mechanical properties, while casting resins exhibit a pronounced reduction in melt viscosity. Use of GENIOSIL® XL 32 as a co-monomer in polymers results in binders that display extremely rapid curing and strong adhesion to the substrate thanks to the alpha-effect, and are additionally characterized by a pronounced improvement in wet scrub resistance and increased abrasion and scratch resistance. At the same time, the binder flexibility can be selectively adjusted by means of the dialkoxysilyl group. As a component of free radical curable adhesives and sealants, GENIOSIL® XL 32 permits the adjustment of mechanical properties and results in improved substrate adhesion.

Special features: GENIOSIL® XL 32 is an alkoxysilane with a methacrylic organofunctional group. It´s a clear, colorless, light and heat sensitive liquid with a characteristically sweet odor. The silane hydrolyzes in the presence of moisture (methanol is released) to form silanols, which can then react with themselves to produce siloxanes or bind to inorganic substrates. The close proximity of the alkoxysilyl group to the ester function results in greatly accelerated hydrolysis and condensation reactions (alpha-effect).As a bifunctional, organically unsaturated molecule, GENIOSIL® XL 32 is able to function as a molecular bridge between inorganic and organic substrates. An additional bonus deriving from the dialkoxysilyl group in GENIOSIL® XL 32 is that VOC (volatile organic compound) emissions during hydrolysis reactions are reduced by one third compared to trialkoxysilanes.

Application: GENIOSIL® XL 32 is mainly used as a surface modifier for glass fibers, fillers and pigments used in thermoplastics, thermosetting plastics and elastomers. As a polymer component of moisture-curing coatings or adhesive and sealant formulations, for example, GENIOSIL® XL 32 functions as a crosslinker and/or adhesion promoter. Other important uses are in the production of pipes and cables made of silane crosslinked polyethylene (PE-Xb), in heat and/or radiation-curable adhesives and sealants and as an adhesion promoter in paints and industrial coatings.

Information provided by Wacker Chemie AG.