Silane oligomers are short-chain molecules made by linking several silane molecules together. They sit between a simple silane monomer and a full silicone polymer.
Think of it this way:
- Monomer: one silane molecule
- Oligomer: a small cluster of silane molecules (typically 2-20 units)
- Polymer: hundreds or thousands of repeating units
Silane oligomers can be thought of as "pre-condensed, higher-performance silanes" that retain the chemistry of traditional coupling agents while offering improved environmental, processing, and durability performance.
This is why they are becoming increasingly important in modern sealants, coatings and composites.
Monomeric Silane vs. Silane Oligomer
| Property | Monomeric Silane | Silane Oligomer |
| VOC release | Higher | Lower |
| Flash point | Lower | Higher |
| Hydrolytic stability | Moderate | Better |
| Adhesion | Good | Often better |
| Durability | Good | Often better |
| Handling safety | Moderate | Better |
BRB offers several oligomeric silanes in its Silanil® product range:
| Product | Description | Functionality |
| BRB Silanil® 1479 | Diaminoalkylsilane co-oligomer | Adhesion promoter |
| BRB Silanil® Si40 | Tetraethoxysilane oligomer | Coupling agent / crosslinker |
| BRB Silanil® 533 ESO | Epoxy-functional oligomer | Adhesion promoter / coupling agent |
| BRB Silanil® 581 | 3-aminopropyltriethoxysilane oligomer | Adhesion promoter |
For more detailed information, please refer to our Silanes Brochure at the bottom of this page.
