Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Features and Benefits
- High strength adhesive for poly/vinylester laminates
- No volume loss during pumping
- Long geltime and fast cure for quick demolding
- Excellent ‘wet-out’ of surface - strong bonds to poly/vinylester laminates
- Stacks well on top of stringers
- Hangs well on vertical and inverted surfaces
- Fast pumping speed with low pumping pressures
- Reliable strength in thin and thick bondlines
- Product Highlights
B39 was formulated to provide reliable structural bonds in both thin and thick bondlines (1/8” to 1”, 3 – 25mm). B39 has low shrinkage, low exotherm, and no volume loss during pumping. The long gel time and fast cure make it ideal for the bonding and quick demolding of large parts such as fiberglass overhead and interior liners and molded structural grids. B39 “hangs well” on vertical and inverted surfaces, and “stacks” well on top of stringers. For bondline thickness of 1” (25 mm) and less, the exotherm is low, reducing the chance of print-through in thin laminates. B39 can also be used for hull- to-deck joints and strake filling. B39 uses MEKP catalysts, and is available in “S” (Summer) and “W” (Winter) grades.
Applications & Uses
Properties
- Color
- Appearance
- Light grey
- Mechanical Properties
- Typical Properties
- Application Properties
- Note
1. Measured using Brookfield Viscometer at 25°C
2. Test to BS EN ISO 527-2-1996.
| Value | Units | Test Method / Conditions | |
| Hardness | 70 | Shore D | — |
| Shrinkage | min. 1 | % | — |
| Tensile Strength² | 13 | MPa | — |
| Tensile Modulus³ | 1963 | MPa | — |
| Elongation (at Break)² | 1 | % | — |
| GRP Lap-Shear Strength² | 4 | MPa | — |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.05 | — | — |
| Viscosity¹ | 280,000 - 320,000 | cP | — |
| Value | Units | Test Method / Conditions | |
| Geltime or Working time | 55 | minutes | — |
| Exotherm (100 Gram Mass) | 100 - 135 | °C | — |
| Gap Filling | 3 - 25 | mm | — |
Technical Details & Test Data
- Catalyzation
5 Gallon Pails: Mix contents before catalyzation with a paddle type mixer. After catalyzation, mix again, with care to scrape edges and bottom of pail. If low temperature prevents a complete cure, increase shop temperatures, not the catalyst level. Assure that parts to be bonded have reached shop temperature. Drums: B39, B39HP is dispersed from the drum by gun application, with internal mix catalyst systems.
- Surface Preparation
Surface to be bonded should be dry, clean and free of dust, oil or grease. Check resin system for secondary bonding time window to obtain a chemical bond. If surface is sanded, assure that no dust remains. Vacuum surface rather than using an airhose which only redistributes the dust. Avoid cleaning surface with solvents.These catalization charts have been generated from laboratory conditions and a constant controlled setting. Specific Gravity of the B39 is 1.05 g/cc. The laboratory moisture level is less than 20% during these tests. Humidity will affect the results shown above. The information contained in this chart should be used as a base point. Geltimes must be confirmed at shop conditions for use in production environments.
B39 “S” (summer) Catalization Chart 50 - 60 Minute Geltime:
Crompton Hi-Point 90 (1.11 g/cc) Norox MEKP-9/ Norpol # 1 (1.11-1.14 g/cc) Arkema Luperox DDM-9 (1.004 g/cc) Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
°F °C °F °C °F °C 75 24 3.5 125.1 138.9 75 24 3 108.2 119.1 75 24 2.4 94.9 95.3 80 27 2.7 96.5 107.7 80 27 2.35 84.8 93.3 80 27 1.9 75.1 75.4 85 29 2.2 78.7 87.3 85 29 1.8 69.4 71.4 85 29 1.5 59.3 59.5 90 32 1.75 62.6 69.5 90 32 1.45 52.3 67.6 90 32 1.2 47.4 47.6 95 35 1.4 51.8 57.6 95 35 1.25 45.1 49.6 95 35 1 39.5 39.7 B39 “W” (Winter) Catalization Chart 50 - 60 Minute Geltime:
Crompton Hi-Point 90 (1.11 g/cc) Norox MEKP-9/ Norpol # 1 (1.11-1.14 g/cc) Arkema Luperox DDM-9 (1.004 g/cc) Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
Temperature % of Catalyst (by weight)
cc/Gallon (3.78 L)
Grams/Gallon (3.78 L)
°F °C °F °C °F °C 60 16 3.4 121.6 134.9 60 16 2.7 97.4 107.2 60 16 2.5 98.8 99.2 65 18 2.5 89.4 99.2 65 18 2.2 79.4 87.3 65 18 1.8 71.2 71.4 70 21 2.1 75.1 83.3 70 21 1.8 64.9 71.4 70 21 1.45 57.3 57.6 75 24 1.8 64.4 71.4 75 24 1.4 50.5 55.6 75 24 1.2 47.7 47.6 80 27 1.4 50.1 55.6 80 27 1.15 41.4 45.6 80 27 1 39.5 39.7 These catalization charts have been generated from laboratory conditions and a constant controlled setting. Specific Gravity of the B39 is 1.05 g/cc. The laboratory moisture level is less than 20% during these tests. Humidity will affect the results shown above. The information contained in this chart should be used as a base point. Geltimes must be confirmed at shop conditions for use in production environments.
Packaging & Availability
- Country Availability
- Regional Availability
- Packaging
B39 is supplied in pails or drums.
Storage & Handling
- Shelf Life
- 12 Months