Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Applications
- Composites Processing Methods
- Applications
Crystic Topcoat 408PA White is designed for application on the back of GRP moldings, as a decorative, protective coating for the laminate. It will resist mild chemical attack from cleaning agents, etc, but it is not designed for use on the inner surfaces of vessels holding water. For such an application, Crystic Topcoat 506PA White is recommended.
- Application Guidelines
- Crystic Topcoat 408PA White is designed for application by spray gun to the back of GRP laminates in order to protect the fibers from water attack and to provide an attractive finish. Coverage and the evenness of finish is affected greatly by the evenness of the laminate.
- Measures taken to achieve a smooth finish, such as sanding or the use of surface tissue, will result in a smoother topcoated surface. It will also reduce the amount of Crystic Topcoat 408PA White required to cover the surface. In normal use, the application of should be controlled to 0.4-0.5 mm wet film thickness. As a guide, approximately 500-700 g/m2 of topcoat mixture will give the required thickness when evenly applied.
- Formulation Guidelines
- Crystic Topcoat 408PA White should be allowed to attain workshop temperature (18ºC-20°C) before use. Stir well by hand, or with a low shear mixer to avoid aeration, and then allow to stand to regain thixotropy. Crystic Topcoat 408PA White requires only the addition of catalyst to start the curing reaction. The recommended catalyst is Andonox® KP9, and this should be added at 1-3% into the Topcoat. In hot weather, the pot life can be so short even with 1% Andonox® KP9 catalyst, it is difficult to avoid the material gelling in the pot. Do not use less than 1% Andonox® KP9 catalyst. Rather use Norox® MEKP-925H catalyst. The catalyst should be thoroughly incorporated into the Topcoat, with a low shear mechanical stirrer where possible.
- Pot Life
The temperature, and the amount of Andonox® KP9 catalyst or Norox® MEKP-925H catalyst affect the geltime, and hence the pot life of Crystic Topcoat 408PA White. The below table shows geltime in minutes of Crystic Topcoat 408PA at varying temperatures.
Catalyst Type Andonox® KP9 Norox® MEKP-925H Catalyst Addition 1% 2% 3% 1% 2% 3% Temperature Geltime In Minutes 15ºC Combination not recommended. 17’ 14’ Combination not recommended. Combination not recommended. Combination not recommended. 25ºC 14’ 11’ Combination not recommended. 32’ 13’ 35ºC 7’ 5’ Combination not recommended. 15’ 7’ The topcoat, molding and workshop should all be at or above, 15°C before curing is carried out. Scott Bader (Pty) Ltd. will not be liable for problems caused by use at lower temperatures than recommended.
N.B. Peroxide catalysts are highly reactive and may decompose with explosive violence, or cause fires, if they come into contact with flammable materials, metals or accelerators. For this reason they must never be stored in metal containers or be mixed directly with accelerators.
Properties
- Color
- Physical Form
- Appearance
- Viscous white Liquid
- Uncured Properties
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C, Brookfield RVT, 100 rpm) | 2500 | Centipoise | — |
| Gel Time (at 25°C, using 2% Catalyst M) | 11 | Minutes | — |
| Film Geltime (at 25°C, 500 Microns, Using 2% Andonox® KP9 Catalyst) | 16 | Minutes | — |
| Stability (in dark at 20°C) | 3 | Months | — |
| Thixotropic Index | 2.8 | Ratio | — |
Technical Details & Test Data
- Additives
- The addition of fillers to Crystic Topcoat 408PA White can adversely affect the water and scuff resistance of the cured Topcoat. Should colored Topcoat be required, Crystic Topcoat 408PA can be supplied in a range of colors, or may be pigmented using Crystic Pigment Pastes.
Packaging & Availability
- Packaging Type
- Packaging
- Crystic Topcoat 408PA White is supplied in 25Kg and 225Kg containers.
Storage & Handling
- Storage
- Crystic Topcoat 408PA White should be stored in the dark in suitable, closed containers. It is recommended that the storage temperature should be less than 20ºC where practical, but should not exceed 30ºC. Ideally, containers should be opened only immediately prior to use. Where they have to be stored outside, it is recommended that drums be kept in a horizontal position to avoid the possible ingress of water. Wherever possible, containers should be stored under cover.