Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Highlights
- Very good heat resistance up to 150 °C
- Good spreading properties
- Good mechanical resistance
Applications & Uses
- Markets
- Composites Processing Methods
- Application
- Manufacturing of vacuum forming tools
- Manufacturing of injection molds as well as laminating molds and bonding fixtures
- Processing
- The material, processing and mold temperature should be at least 18 ─ 25 °C.
- Component A must be stirred thoroughly before use.
- Recommended release agents are Sika® Liquid Wax-815 or Sika® Pasty Wax-818. For more information, see Product Data Sheets of the release agents.
- Pay attention to dry conditions and dry mold surfaces while processing.
- Porous surfaces have to be well sealed before.
- Both components have to be mixed thoroughly according to mixing ratio with a spatula or slow speed mixing equipment.
- Apply the gelcoat in a homogenous thickness on the mold by using a flat, short-haired brush. We recommend to apply the material in a uniform direction in order to get a homogeneous, even and void-free surface coat.
- Within the geltime of gelcoat we recommend to apply a coupling layer or other backfilling layer in order to avoid adhesion problems.
- In order to improve resistance of gelcoat and final part against temperature influences, solvents as well as exposition of water, a post curing process of 1 h / 80 °C and 2 h / 160 °C of the final part is recommended. In this case a slow increase and slow decrease of temperature is required.
- Further post curing of the demoulded part can improve the final mechanical properties.
- Depending on the geometry and weight of the part, it is recommended to use a conformer while post curing.
- For cleaning the final part from release agent residues, we recommend Sika® Reinigungsmittel-5. Before use of other cleaners, compatibility must be tested.
Properties
- Color
- Mechanical Properties
- Component A
- Thermal Properties
- Component B
| Value | Units | Test Method / Conditions | |
| Impact Resistance | 10 | kJ/m² | ISO 179 |
| Density | 1.65 | g/cm³ | ISO 1183 |
| Flexural Modulus | 6000 | MPa | ISO 178 |
| Flexural Strength | 85 | MPa | ISO 178 |
| Hardness | 89 | Shore D | ISO 868 |
| Value | Units | Test Method / Conditions | |
| Viscosity at 23°C | pasty | mPa.s | — |
| Density at 23°C | 1.75 | g/cm³ | — |
| Value | Units | Test Method / Conditions | |
| Heat deflection temperature | 145 | °C | ISO 75B |
| Glass transition temperature | 158 | °C | ISO 11357 |
| Value | Units | Test Method / Conditions | |
| Viscosity at 23°C | ~ 80 | mPa.s | — |
| Density at 23°C | 0.92 | g/cm³ | — |
Packaging & Availability
- Packaging Type
- Packaging
- Resin (A), Biresin® S19 : 4 kg
- Hardener (B), Biresin® S19 : 6 x 0.48 kg
- Kit (AB), Biresin® S19 : Box: 6 x 0.5 kg (A) + 6 x 0.06 kg (B)
Storage & Handling
- Storage Conditions
Shelf life
- Resin (A), Biresin® S19 : 12 months
- Hardener (B), Biresin® S19 : 12 months
Storage temperature- Resin (A), Biresin® S19 : 18 ─ 25 °C
- Hardener (B), Biresin® S19 : 18 ─ 25 °C
Crystallization
- After prolonged storage at low temperature, crystallization of components may occur.
- This is easily removed by warming up for a sufficient time to a maximum of 70 °C.
- Allow to cool to room temperature before use.
Opened packagings
- Containers must be closed tightly immediately after use to prevent moisture ingress.
- The residual material needs to be used up as soon as possible.