Enhanced TDS
Knowde-enriched technical product data sheet
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
- Applications
- 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
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 - Component A
Value Units Test Method / Conditions Viscosity at 23°C pasty mPa.s - Density at 23°C 1.75 g/cm³ - - Thermal Properties
Value Units Test Method / Conditions Heat deflection temperature 145 °C ISO 75B Glass transition temperature 158 °C ISO 11357 - Component B
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.