GENIOSIL® XB 502

1 of 1 products in this brand
GENIOSIL® XB 502 is a silane-terminated binder based on alpha-silane technology, specifically designed for formulating high-strength adhesives. It finds applications in various areas, including building and construction adhesives, do-it-yourself projects, and industrial adhesives. One of its specific uses is for wood-to-wood bonding.

Chemical Family: Silanes, Silyl-modified Polymers (SMP)

End Uses: 1K (1 Component) Adhesive, 2K (2 Component) Adhesive

Compatible Substrates & Surfaces: Ceramic, Concrete, Glass, Metal, Wood

Features: Anti-foaming, Fast Cure, Good Heat Stability, Heat Resistance, High Reactivity, Improved Ageing Resistance, Improved Hardness, Improves Adhesion, Long Shelf Life, Low Viscosity, Multi-Substrate Adhesion, Water Resistance

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Compatible Substrates & Surfaces
Cure Method
Applications
  • Building & Construction Adhesives
  • Wood-to-Wood Bonding
  • Industrial Adhesives
  • Adhesives
  • Do It Yourself
Application Details
  • GENIOSIL® XB 502 dissolves readily in standard organic solvents. It is virtually insoluble in aqueous media, and reacts slowly releasing methanol and forming a resinous deposit. Despite its highly reactive terminal groups, uncatalyzed GENIOSIL® XB 502 is stable in air for several days.
  • However, its reactivity with water or atmospheric humidity must be taken into account during storage and processing, since the material will slowly start to condense. GENIOSIL® XB 502 can be formulated by conventional methods and mixing processes.
  • The formulation composition depends on the required property profile. GENIOSIL® XB 502 can be formulated with a variety of fillers. The range starts with oxides, such as aluminum hydroxide, quartz powders or pyrogenic silica, and extends to coated and uncoated chalks.
  • The type and amount depends on the mechanical needs as well the desired thixotropy. Water scavengers can be added to stabilize the formulations against premature curing as this is moisture-curing technology. Therefore exclusion of moisture during compounding and storage is necessary.
  • GENIOSIL® XL 10 or GENIOSIL® XL 70 are particularly suitable scavengers. Any type of plasticizer can be used to further lower the viscosity. In order to plasticize a GENIOSIL® XB 502 based formulation it is recommended to use any type of silane modified polymer e.g. GENIOSIL® STP-E10. Antioxidants, UV- and lightstabilizers are mandatory to ensure durable sealants and adhesives.
  • The amount and type of stabilizer depends on application needs. Curing of GENIOSIL® XB 502 requires a catalyst that does not necessarily have to be organo-metallic. However dioctyl tin may be used if required. Catalysis can also be accelerated with titanium compounds as well as inorganic (phosphoric) or organic (tartaric) acids.
  • Primarily, we recommend using an amine catalyst, and adjusting the skinformation time by varying the amount of aminosilane used. GENIOSIL® GF 9 and GENIOSIL® GF 95 have proven particularly advantageous here. In particular, GENIOSIL® GF 95 can attain improved water resistance, which can further be increased by the addition of epoxy silanes.

Surface Treatment

Always apply the formulation to clean and dry surfaces. GENIOSIL® XB 502 is used as a reactive binder for adhesives, potting compounds and coatings.

Application

  • Curing takes places at ambient temperature in the presence of both moisture and catalyst. Depending on the formulation, either prepared as onepart or two-part systems, it will give good adhesion to a wide variety of substrates even without pretreatment.
  • Adhesives can be formulated having high lap-shear strength (< 15 N/mm²) on a wide variety of substrates.
  • With certain substrates, modifying the elasticity of the GENIOSIL® XB 502 containing binder is advisable. Based on the model formulation using a filler (1 : 1), with 2.5 % GENIOSIL® GF 9 as the catalyst, the lap-shear-strength of beech/beech and aluminum/aluminum test specimens was determined.
  • While GENIOSIL® XB 502 is ideal for bonding wood, metals can be very readily bonded when GENIOSIL XB 502 is blended with GENIOSIL® STP-E10 at a ratio of 3 : 1.

Further state-of-the art bonding

  • Wood
  • Stone
  • Metal
  • Bonding of dissimilar substrates (e.g. Wood/metal, metal/concrete)

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Lap Shear Strengthmax. 15N/mm²
Density (at 25°C, 1013 hPa)1.13g/cm³DIN 51757
Flash Pointmin. 100 °CISO 2719
Ignition Temperature380°CEN 14522
Specifications
ValueUnitsTest Method / Conditions
Colour Indexmax. 50DIN ISO 6271
Properties

GENIOSIL® XB 502 is silicon reinforced polyether-based silane-terminated polymer suitable as a binder in moisture curing formulations. It is a transparent low-viscosity binder and the resultant adhesives display hardness in the high Shore D range when cured. This polymer complements the elastic binder range such as GENIOSIL® STP-E10 and can be readily mixed with this product group at various ratios in order to tailor the properties to the respective application. GENIOSIL® XB 502 based on alpha technology, which means a structural proximity of a nitrogen atom to the moisture active silicon atom. It hydrolyzes in the presence of moisture to finally form a stable siloxane network initiated by mild catalysis as opposed to heavy metal ions. Formulations are characterized by the following advantages.

 
     
  • Simple compounding with conventional auxiliaries
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  • Plasticizer free if desirable
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  • Transparent systems
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  • Good mechanics
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  • Long shelf life
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  • Hardness in the Shore D range
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  • Good adhesion to metals, glass and ceramics
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  • Non-bubbling
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  • Isocyanate, tin and solvent-free - Formulation of water resistant products possible
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  • Good heat stability
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Regulatory & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • North America
  • Oceania