Tonsan® AT 2641 is a 2K PU structural adhesive designed for composite materials bonding. It cures at room temperature or can be accelerated with heating, resulting in excellent adhesion, impact resistance, water resistance, electrical isolation, and corrosion resistance upon curing.

Chemical Family: Polyurethanes (PU)

Product Type: 2K (2 component) Adhesive, Reactive Adhesive, Structural Adhesive

Compatible Substrates & Surfaces: Composites

Features: Corrosion Resistant, Excellent Isolation Resistance, Excellent Toughness, Excellent Water Resistance, Fast Curing, Good Adhesion, High Impact Resistance, High Strength

Technical Data Sheet

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Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Highlights
  • Suitable for kinds of composites bonding
  • Toughness and high strength
  • Fast curing speed

Applications & Uses

Compatible Substrates & Surfaces
Appplication Instructions
  • Surfaces must be clean, dry and free from all traces of grease, oil and dust.
  • Part A and B are mixed homogeneous with a static mixer before applying.
  • Note: the mixed adhesive must be applied during pot life.
  • AT 2641 can be cured at room temperature or can be accelerated with heating.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Service Temperature-40 to 100°C-
Cured Mechanical Properties
ValueUnitsTest Method / Conditions
Hardness (Shore A)60 - 80AGB/T 528
Tensile Strengthmin. 5MpaGB/T 528
Elongation at Breakmin. 250%GB/T 7124
Lap-shear Strength (PCABS-IPA Clean)min. 3.5Mpa-
Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (Part-A)approx. 150,000mPa.sGB/T 2794
Viscosity (Part-B)approx. 250,000mPa.sGB/T 2794
Density (Part-A)1.20 - 1.30g/ml
Density (Part-B)1.20 - 1.30g/ml
Mixed Ratio (by Weight)1:1
Mixed Ratio (by Volume)1:1
Open Time (at 21 to 25 °C)approx. 3min-
Gel Time (at 21 to 25 °C)approx. 5min-

Packaging & Availability

Packaging Type
Packaging Information
  • 1:1 400ml cartridge
  • 5 gallon pail and 55 gallon pail

Storage & Handling

Shelf Life
6 months
Storage Information
  • Part A and B are sensitive to moisture. Therefore they have to be stored in tightly closed containers.
  • Part A and B must be stored and applied between 15 - 30℃.