Körapur® 840
1 of 19 products in this brandRTU Product Type: 2K (2 component) Adhesive, Reactive Adhesive
Application Area: Bus, Truck, Wall
Compatible Substrates & Surfaces: Alloy Steel, Aluminum Alloys, Carbon Fiber Reinforced Plastics (CFRP), Coated Surfaces, Composites, Glass Fibre Reinforced Polymer (GFRP), Metal, Painted Surfaces, Steel, Wood
Chemical Family: Polyurethanes (PU)
Features: Good Adhesion, Good Impact Strength, Good Sagging Resistance, Impact Resistance, Long Potlife, No Shrinkage
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Type Document Name
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Technical Data SheetKörapur 840 Technical Data Sheet
Enhanced TDS
Identification
- Chemical Family
- GBU
- RTU Product Type
- Categories
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Application Information
- Cure Method
Applications
- Application Area
- Compatible Substrates & Surfaces
Applications & Uses
- Processing
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Processing
Consistency
Non-sagging Pasty Surface requirements
Dry Clean free of grease free of dust Product is free of
solvents plasticizers Cleaning Cleaner for tools Körasolv PU Hints Moisture Sensitivity The adhesive must not be exposed to moisture before and during application.
Moisture causes foaming leading to lower mechanical properties.- For some substrates the use of mechanical pretreatment and/or cleaner or primer is necessary to achieve good adhesion.
- Low temperatures can cause a temporary increase in viscosity resulting in reduced extrusion and slower curing rates.
- Clean tools immediately after use. Once cured, the material can only be removed mechanically.
- Processing Information
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Preparation
- For some substrates the use of mechanical pretreatment and/or cleaner or primer is necessary to achieve good adhesion. Refer to the product properties section of this data sheet for special surface requirements and suitable adhesion promoters.
Processing
- parameters. Low temperatures can cause a temporary increase in viscosity resulting in reduced extrusion and slower curing rates.
Cleaning
- Clean tools immediately after use. Once cured, the material can only be removed mechanically. Appropriate cleaners are listed in the product properties table. For further information please contact your local sales office.
Features
- Ready-to-Use Product Features
Features & Benefits
- Labeling Claims
- Product Features
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- No significant shrinkage
- High impact strength
- Wide range of pot life profiles available
Packaging & Availability
- Country Availability
- Regional Availability
Physical Properties
- Physical Form
Properties
- Density:
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1500 kg/m³
- Glass Transition Temperature (Tg):
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30 °C
- Specific Gravity:
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1.5
- Strain at Break:
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30 %
- Tensile Strength:
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12 MPa
- Viscosity:
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45000 cps
- Recommended Operating Conditions
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Value Units Test Method / Conditions Service Temperature - 160 - 90 °C - Short-Term Temperature Resistance 120.0 °C - - Cured Properties
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Value Units Test Method / Conditions Elongation at Break 30.0 % DIN EN ISO 527 G10-Modulus 80.0 MPa DIN EN 14869-2 Hardness 65 Shore D DIN ISO 7619-1 Hardness 65 Shore D ISO 868 Lap Shear Strength (substrates: aluminum/aluminum) 18.0 MPa DIN EN 14869-2 Pot Life 2 - 45 min - Tensile Strength 12.0 MPa DIN EN ISO 527 - Processing Parameters
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Value Units Test Method / Conditions Mix Ratio (by volume, Part A:Part B) 4:1 - - Mixing Ratio (Part A:Part B, by weight) 5.0:1 - - Processing Temperature 15 - 25 °C - Viscosity 45000.0 mPa.s Kö-test method 100003 - Physical Properties
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Value Units Test Method / Conditions Density 1.55 g/cm³ DIN EN 542 Glass Transition Temperature 30.0 °C DIN EN ISO 6721-1 - Processing Properties
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Value Units Test Method / Conditions Density 1.5 g/cm³ DIN EN 542 Elongation at Break 30 % DIN EN ISO 527 G10-Modulus 80 mPa DIN EN 14869-2 Glass Transition Temperature 30 °C DIN EN ISO 6721-1 Hardness 56 Shore D DIN EN ISO 868 Lap Shear Strength (substrates: aluminium/aluminium) 18 mPa DIN EN 14869-2 Mixing Ratio (Part A : Part B) 4.0 : 1 v% - Mixing Ratio (Part A : Part B) 5.0 : 1 wt % - Pot Life 2 - 45 min Kö-test method 100178 Processing Temperature 15 - 25 °C - Service Temperature - 160 to 90 °C - Short Term Temperature Resistance (60 min) 120 °C - Tensile Strength 12 mPa DIN EN ISO 527 Viscosity (Köracur® TH 650) 45000 mPa·s Kö-test method 100003 - Component A
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Value Units Test Method / Conditions Density (Körapur® 840) 1.55 g/cm³ DIN EN 542 Storage Temperature (Körapur® 840) 15 - 25 °C - Viscosity (Körapur® 840) 420000 mPa·s Kö-test method 100000 - Component B
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Value Units Test Method / Conditions Density (Köracur® TH 650) 1.23 g/cm³ DIN EN 542 Density (Köracur® TH 724) 1.25 g/cm³ DIN EN 542 Isocyanate Content (Köracur® TH 650) 31 % - Storage Temperature (Köracur® TH 650) 10 - 25 °C - Storage Temperature (Köracur® TH 724) 10 - 25 °C - Viscosity (Köracur® TH 650) 300 mPa·s Internal Standard HBF00869 Viscosity (Köracur® TH 724) 70000 mPa·s Internal Standard HBF00869
Regulatory & Compliance
- Certifications & Compliance
Storage & Handling
- Storage Information
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Körapur® 840 should be used within the shelf life specified on the packaging. The storage stability applies to material stored under appropriate conditions only (original unopened containers, recommended storage temperature).
Technical Details & Test Data
- Processing Information
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Suitable Substrates Various aluminium alloys
Various steel alloys
Various composite materials (e.g. CFRP, GFRP)
Wood
Coated surfaces
Various other substratesConsistency Non-sagging
PastySurface Requirements Dry
Clean
Free of grease
Free of dustApplication Method Using side-by-side cartridge with static mixer
Using mixing cartridgeApplication Equipment Two part mixing and metering system
Product is free of Solvents, Plasticizers - Cleaner for Tools Körasolv® PU
- Moisture Sensitivity The adhesive must not be exposed to moisture before and during application. Moisture causes foaming leading to lower mechanical properties.