Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Highlights
- Good spreading properties and non-sagging up to 1 mm
- Good heat resistance and abrasion resistance
- Good solvent and styrene resistance
Applications & Uses
- Markets
- Composites End Use
- Composites Processing Methods
- Application
Manufacturing of master models, vacuum forming tools and foundry patterns
- 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 2 h / 80 °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 | |
| Density | 2.2 | g/cm³ | ISO 1183 |
| Flexural Modulus | 7500 | MPa | ISO 178 |
| Flexural Strength | 78 | MPa | ISO 178 |
| Compressive Strength | 130 | MPa | ISO 604 |
| Impact Resistance | 10 | kJ/m² | ISO 179 |
| Hardness | 92 | Shore D | ISO 868 |
| Value | Units | Test Method / Conditions | |
| Viscosity at 23°C | ~ 100.000 | mPa.s | — |
| Density at 23°C | 2.36 | g/cm³ | — |
| Value | Units | Test Method / Conditions | |
| Heat deflection temperature | max. 100 | °C | ISO 75B |
| Value | Units | Test Method / Conditions | |
| Viscosity at 23°C | ~ 180 | mPa.s | — |
| Density at 23°C | 1 | g/cm³ | — |
Packaging & Availability
- Packaging Type
- Packaging
- Resin (A), Biresin® S12 : 5 kg
- Hardener (B), Biresin® S12 : 9 x 0.4 kg / 2.5 kg / 15 kg
- Kit (AB), Biresin® S12 : Box: 6 x 0.5 kg (A) + 6 x 0.04 kg (B)
Storage & Handling
- Storage Conditions
Shelf life
- Resin (A), Biresin® S12 : 24 months
- Hardener (B), Biresin® S12 : 12 months
Storage temperature- Resin (A), Biresin® S12 : 18 ─ 25 °C
- Hardener (B), Biresin® S12 : 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.