Silane Coupling Agent

Choose IMLV/N330 for general reinforcing filler systems

Best suited when your compound uses white carbon black, silicate, clay, or mica as the reinforcing filler and you need improved modulus, tensile strength, and wear resistance across NR, SBR, IR, BR, NBR, or EPDM.

Choose SI69-50 for silica-filled tire compounds

The standard choice for radial tire production and other silica-heavy compounds where you need coupling, reinforcing, and vulcanization support in a single grade — note that formulations typically require roughly twice the dosage of pure Si-69 to account for the 50% active content.

Add a Silane Companion when VOC or silanization efficiency is a concern

The Companion Liquid is designed to be paired with a primary silane like SI69-50 — it improves silanization efficiency, lowers the silane dosage needed, reduces VOC emissions, and improves white carbon black dispersion, while also boosting static mechanical properties and tread wear resistance.

Powder vs. liquid companion format

Silane Companion Powder offers a solid-form alternative to the Liquid companion for plants that prefer powder handling in their mixing process — full technical specifications for this grade are still being finalized.

1. What's the difference between a coupling agent and a "companion" product?

IMLV/N330 and SI69-50 are primary coupling agents that form the chemical bond between filler and rubber. The Silane Companion products are not standalone couplers — they're processing aids used alongside a primary silane to improve how efficiently the silanization reaction proceeds, which can lower the primary silane dosage needed and reduce VOC emissions.

2. Why does SI69-50 need roughly double the dosage of pure Si-69?

SI69-50 is a 50% active pre-dispersed grade, carried in a dispersion agent for dust-free, accurate handling. Because only half the weight is active silane chemistry, formulations built around pure Si-69 dosage need to be roughly doubled by weight to deliver the same active silane content.

3. Can IMLV/N330 and SI69-50 be used in the same compound?

They're typically chosen based on the primary filler system rather than combined — IMLV/N330 for carbon-black-oriented reinforcement, SI69-50 for silica-driven tire performance. If your compound uses a mixed filler system, our technical team can advise on whether a combination or a single grade is the better fit.

4. Is more technical data available for the Silane Companion products?

Full composition and technical specifications for the Silane Companion Liquid and Powder are still being finalized. Contact our technical team directly for current data sheets while this section of the catalog is being completed.