Isobutyltriethoxysilane | Manta LB320

Manta LB320 is isobutyltriethoxysilane (CAS 17980-47-1, ≥98.0% GC purity) used as a deep-penetrating water repellent for concrete, brick and stone and as an external electron donor in Ziegler-Natta polypropylene catalysis. It is an alternative to Dow OFS-6403, GENIOSIL IBTE CE and Evonik IBTEO, and it releases ethanol rather than methanol on hydrolysis.

Manta LB320 Silane is an undiluted isobutyltriethoxysilane. Characterized by its small molecular structure and highly stable branched isobutyl group, it allows for exceptional penetration depth into porous cementitious and mineral surfaces.

Distinguished by its ethoxy reactive groups, Manta LB320 offers a significant safety and environmental advantage over methoxy-based silanes. Upon reaction with moisture, it liberates ethanol rather than toxic methanol, making it a safer and more eco-friendly alternative for stringent formulations.

In highly alkaline environments, such as freshly cast concrete, it reacts with moisture to produce silanol groups that chemically bond with the substrate, creating a permanent, three-dimensional hydrophobic network. This internal treatment drastically reduces capillary water absorption while retaining the substrate’s original appearance and breathability.

Alternative to Dow OFS-6403,GENIOSIL IBTE CE, Evonik IBTEO, Catylen D1200.

1. Ziegler-Natta Catalyst Donor (Polyolefin Production) Acts as a highly critical external electron donor in Ziegler-Natta catalyst systems for the polymerization of polypropylene (PP). It provides excellent stereoselectivity control, ensuring high isotacticity and superior mechanical properties in the final polymer.
2. Premium Architectural Water Repellent: Serves as an elite, deeply penetrating sealer for concrete, brick, and natural stone. Due to its ethanol-releasing profile, it is highly recommended for indoor infrastructure and green-building projects to protect against freeze-thaw damage and chloride ion ingress.
3. Mineral Filler Surface Modification Effectively modifies the surface of inorganic pigments and mineral fillers (such as ATH, silica, and talc). The branched isobutyl group lowers surface energy, significantly improving filler dispersion and compatibility within non-polar polymer matrices.