Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Features
- The gelcoat may be ordered in clear version : 7090 CLEAR / 7091 mainly for parts such as carbon look parts. Factory colored version 7090 NOIR & 7090 BLANC / 7091T is available for tools production.
- The clear version could also be pigmented to any RAL color : simply add 5% epoxy pigment paste in the resin part before mixing with the hardener.
- Like most epoxy gelcoats it is best applied by brush while its formula guarantees low toxicity working conditions to the users. Laminates can be released from the molds after a low temperature cure cycle (8h at 50°C) before post curing.
- RESOLCOAT 7090 / 7091(T) is recommended to be used in wet layup, infusion and with prepregs reinforcements
Applications & Uses
- Markets
- Composites Processing Methods
- Applications
- The standard procedure of working with epoxy gelcoats applies this system. The 7090 system is best applied by brush, but some customers manage spraying it diluted with 5 to 10% MEK or acetone with 3,5mm nozzle gravity sprayguns. This method exposes to a high risk of solvent entrapment if spraying is not done from far enough, resulting in possible delaminating between the gelcoat and the laminate during the post curing. It is mandatory to test within the real workshop conditions before any industrial size spray application.
- After a room temperature cure, the gelcoat will harden enough to enable laminating, infusing or placing prepregs onto the gelcoat without print through of the fiber on its surface.
- After a room temperature cure, the crosslinking between the gelcoat resin+hardener will not be com- plete, so when final post cure of the laminated part or tool will be done, the lamination or prepreg resin, will co-cure with the gelcoat ensuring a good chemical and mechanical bond between the gelcoat and the laminate. Prepregs with very low resin content are not recommended. It is recommended to have workshop temperature conditions between 18-25°C in order to facilitate the mixing and the application. A lower temperature will increase the viscosity of the mix as well as its pot life, and brush application of the clear version may result in a thicker gelcoat film reducing the transparency. On the contrary, a higher temperature will reduce the viscosity and the pot life of the mix.
Properties
- Color
- Physical Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Density (23°C) | 1.17 | — | — |
| Mix Viscosity (23°C) | 1.12 | mPa.s | — |
| Viscosity (23°C) | 13300.0 | mPa.s | — |
| Value | Units | Test Method / Conditions | |
| Reactivity (70mL (~4cm thickness) at 23°C) | 4h | — | — |
| Temperature (Exothermic peak on 70mL at 23°C) | 69.0 | °C | — |
| TG (after following post-curing cycle) | 134.6 | °C | — |
| Time (Exothermic peak on 70mL at 23°C) | 4h | °C | — |
| Touch (dry at 23°C) | 8h to 12h | °C | — |
Safety & Health
- Health & Safety
Skin contact must be avoided by wearing protective nitrile gloves & overalls or other protective clothing. Eye protection should be worn to avoid risk of resin or hardener entering the eyes. If this occurs flush the eye with water for 15 minutes, holding the eyelid open, and seek medical attention. Ensure adequate ventilation in work areas. Respiratory protection should be worn with ABEKP coded filters.
Packaging & Availability
- Packaging Type
- Packaging
Kits 7090 CLEAR or COLOURED/ 7091(T)
- 1kg+0.3kg
- 5kg+ 1.5kg
- 10 kg+3kg
- 25kg+ 7.5kg
- 200kg+ 3x20kg
Storage & Handling
- Storage
- Shelf life is minimum one year in sealed containers as provided. Keep containers away from heat and cold preferably between 10°C and 30°C in a well ventilated area.