Silquest™ A-Link* 15

1 of 96 products in this brand
Silquest™ A-Link 15 silane may be used for use as an endcapper or crosslinker for isocyanate functional prepolymer systems. This product provides improved thermal and UV stability over previous secondary amino silane endcappers. Silquest™ A-Link 15 silane can also be utilized as an adhesion promoter in silicone, hybrid, urethane, and epoxy adhesives and sealants.

Functions: Adhesion Promoter, Coupling Agent, Crosslinking Agent

Chemical Family: Silanes

Features: Excellent Adhesion

Technical Data Sheet

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Identification & Functionality

Chemical Family
Technologies

Features & Benefits

CASE Ingredients Features
Product Highlights

Secondary Amino Functionality

  • Provides a controlled reaction with -NCO, -COOH, and epoxy functional materials, providing a moisture cure silane crosslink mechanism.
  • Secondary amino functionality avoids viscosity instability associated with use of primary amino silanes as prepolymer endcappers/crosslinkers.
  • This alkylamino offers enhanced thermal stability versus arylamino silanes.

Trimethoxy Silane Functionality

  • Provides fast hydrolysis in the presence of formulated or atmospheric moisture.
  • Provides excellent wet adhesion to glass, metal and other inorganic substrates.
  • Resulting bond offers excellent thermal, chemical and UV stable performance.
  • Amine catalyzed crosslinker and adhesion promotion in silane functional systems (silicone, hybrid, SPUR+* prepolymer technology modified urethanes).
Features and Benefits

After endcapping an-NCO functional prepolymer with Silquest A-Link 15 silane, the silylated resin will moisture-cure at room temperature by hydrolysis and condensation of the reactive alkoxysilane terminal groups. The resulting siloxane bond is stable to attack from heat, solvents and UV radiation. Sealants formulated with silylated prepolymers offer broad formulation freedom and a wide variety of features and benefits.

excellent primerless adhesion to glass, aluminum and other metals

unusually good adhesion to plastics such as PVC, Polystyrene, Nylon, ABS and acrylics, when an amino silane such as Silquest A-1110 silane is utilized as an adhesion promoter in conjunction with the silylated resin

  • fast, bubble free cure
  • excellent durability and joint movement
  • good tensile strength and elasticity
  • freedom to formulate low modulus/high elongation or high modulus/low elongation systems
  • durable Si-O-Si crosslinks
  • excellent solvent resistance
  • immediate paintability
  • isocyanate-free urethane performance
  • good UV stability, without sacrificing cure rates

This technology may be an excellent material of choice for applications such as various windshield, transportation and industrial sealants, that require strong adhesion to a wide array
of substrates.

Like silicone sealants, sealants based upon Momentive Performance Materials SPUR+ prepolymer technology benefit from the freedom to utilize amino silanes such as Silquest A-1110, and Silquest A-1170 silanes as adhesion promoters, dramatically enhancing the final systems wet adhesion to plastics.

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Adhesive & Sealant Type
Potential Applications

NCO-free Moisture Crosslinkable Urethane Prepolymers via SPUR+* Prepolymer Technology Silquest A-Link 15 silane can be utilized to cost effectively construct a high performance moisture cureable silylated prepolymer. The resultant silylated prepolymer can be formulated with fillers, plasticizers and other additives into room-temperature, moisture-curable products such as one-part transportation, windshield, general industrial, construction sealants or hot melt adhesives. Properties may be modified by varying the prepolymer backbone molecular weight, functionality and chemistry of the polyol, and the sealant formulation.

Crosslinking with Momentive Performance Materials Silquest A-Link 15 silane offers several advantages over other amino silane crosslinked approaches, including

Enhanced Thermal Color Stability - Silylated prepolymers prepared with Silquest A-Link 15 silane provide superior color stability versus amino based endcapper technologies.

Enhanced UV Stability - Silquest A-Link 15 silane based SPUR+ prepolymer-based sealants offer exceptional UV performance. Silquest silane endcapped prepolymers can be formulated to provide superior UV stability versus standard urethane prepolymer technology. The isocyanate-free nature of this system allows the formulator to work with a broader
range of UV stabilizers, enabling one to achieve dramatic improvements in UV stability. Silquest A-Link 15 silane extends this performance with an endcapping structure offering superior UV stability versus other secondary amino silanes.

Properties

Physical Form