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1-800-295-2392 or click below to call one of our regional representatives. Call Regional Customer Service Representative

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Coupling Agents

The principle is simple: With better interfacial bonds between dissimilar materials, the desirable properties of each component can be carried throughout a composite material. This means that component properties are maintained or, in some cases, enhanced. Putting this principle to work for our customers, Momentive has developed silane coupling agents that can help optimize mechanical, electrical, thermal and other properties of an end product.

Additionally, these agents can help avoid some of the drawbacks of traditional coupling agents, such as premature vulcanization of a tire compound, or loss of flexural strength in a glass-reinforced composite exposed to high heat and moisture.

Momentive offers advanced agents for coupling resins with minerals, fiber reinforcements and other fillers. As part of it’s diverse portfolio of silane coupling agents that can improve: can help improve:

  • Resiliency of insulation batts
  • Wet strength retention
  • Thermal and electrical properties
  • Integrity, protection and handling of reinforcing fibers
  • Composite strength and toughness
  • Abrasion resistance
  • Rolling resistance, traction and wear


Processing characteristics of our advanced coupling agents can lead to higher efficiencies, and thus lower costs in manufacturing. Enhanced shelf stability, rheology control, filler dispersion, as well as fewer mixing steps and faster cure, all are typical benefits that our coupling agents offer customers to help improve their bottom lines. Further, some of our coupling agents are especially environmentally advantageous offer limited VOC (volatile organic compound) emissions, virtually eliminating ethanol release during processing and when mineral-reinforced rubber products are used, or providing halogen-free formulated flame retardancy (HFFR). 

Momentive's silane brand families, such as Silquest,* e-free* and NXT* silanes, offer our customers the potential to help increase energy efficiency by reducing the amount of agent required to achieve desired performance levels.

Momentive's coupling agents are frequently specified for applications requiring exceptional bonds between inorganic substrates and organic polymers including:

  • Tires
  • Shoe soles
  • Wire and cable products
  • Belts and hoses
  • Grommets
  • Flooring
  • Fiber-reinforced composites and insulation
  • Filled polymer resin applications


 * Silquest, e-free and NXT are trademarks of Momentive Performance Materials Inc.

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Carbo NXT™ Silane

Carbo NXT* silane is NXT* silane in powder form and can help provide tire enhancement and production efficiencies. Learn more.

e-free™ 189 Silane

e-free* 189 silane is the latest advancement in silanes for mineral coupling with all-around excellence in performance and significant improvements in processing, allowing for reduced manufacturing costs. Learn more.

NXT™ P97 Silane

NXT P97’s coupling chemistry may result in the best RR/wear resistance performance and with that, contribute to the lowest tire-use related emissions. Learn more.

NXT™ Silane

Providing options for enhanced tire performance and overall system cost efficiencies for tire manufacturers worldwide, NXT silane has a unique design that can enable reduced rolling resistance without ...

NXT™ Z 45 Silane

NXT* Z 45 coupling agent may offer improved dynamic and physical properties in tire compounds, and virtual elimination of ethanol emissions. Learn more.

Silquest A-171™ Silane

Silquest* A-171 silane results in Si-O-Si crosslink sites that are highly resistant to the effects of exposure to moisture, chemicals and UV rays. Learn more.

Silquest A-187™ Silane

Silquest A-187* silane is a glycidal epoxy functional silane that may find use as an adhesion promoter in SPUR+* prepolymers, epoxy, polysulfide, silicone systems for caulks, coatings, adhesives and sealants. Learn more.

Silquest™ A-1110 Silane

Silquest* A-1110 silane, a primary amino silane, is a candidate for use as an adhesion promoter in silane modified urethane (SPUR* prepolymer), filled silicone, epoxy and 2 part urethane adhesives and sealants. Learn more.

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* Silplusは、新日鉄住金化学株式会社の商標であり、許可を得て使用しています。

*The marks followed by an asterisk (*) are trademarks of Momentive Performance Materials Inc.