Knowde Enhanced TDS
Identification & Functionality
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Product Highlights
- Excellent dimensional stability during hot and cold water cycling
- Excellent chemical and water resistance
- Good sprayability
- Excellent nonsagging properties
- High clarity
- UV Light stabilized
- Good color retention
- Suitable for low pressure spray equipment
- Meets gel coat test specifications according to ANSI Z124.3
- Meets the BAAQMD, Regulation 8-50-1, Method 26 (Bay Area AQMD of Northern California)
Applications & Uses
- Markets
- Recommended Applications
STYPOL® 040-4917 should be mixed prior to use. Use mixing equipment with sufficient horsepower (relative to container size) to achieve thorough circulation from top to bottom and out to the sides of the container. The agitator must be properly sized for the container and must allow for uniform mixing regardless of the liquid level in the container. Mixing once a day for 10 minutes is typically sufficient. Air bubbling should not be used for mixing. It is not effective and only serves as a potential source of water or oil contamination. Do not overmix STYPOL® 040-4917. Overmixing can break down the resin viscosity increasing the tendency to sag. The cure rate of polyester resins depends on a number of factors including the product’s age, temperature, catalyst type, catalyst level and ambient humidity. When used in a laminating application the laminate cure rate also depends on reinforcement content and laminate thickness as well as other factors. For these reasons, we recommend that customer’s check the cure rate in your plant. STYPOL® 040-4917 is quality control tested using Arkema Luperox® DDM-9. United Initiators Norox® MEKP-9 and Norox® MEKP-9H, and Akzo Nobel CADOX D-50 are expected to yield similar performance. Arkema Luperox® DHD-9, United Initiators Norox® MEKP-925 and Norox® MEKP-925H, Akzo Nobel CADOX L-50a and Pergan HP-90 may also be used, but gel times will vary.
The recommended catalyst range for proper cure is 1.5% to 2.5%, with 2.0% at 77°F being ideal.
This product should not be used when temperature conditions are below 60°F, as curing may be adversely affected. STYPOL® 040-4917 is designed for use with airless system gel coat applications. Suggested parameters are an 1840 tip, 450 psi fluid pressure, 15-20 psi assist pressure, and five-to-eight mil applications per pass. It is advisable to allow for time between passes for air release. Apply 16 to 20 on the deck and 20 to 25 on the bowl. Further information detailing use of these products can be found in the Polynt Composites Applications Guide.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Nonvolatile Material at 77°F | 50.5 | % | — |
| Viscosity Brookfield RVF #3 spindle at 20 rpm at 77°F | 2800 | cps | — |
| Thixotropic Index at 77°F | 7 | — | — |
| Gel Time 100 g mass at 77°F | 12 | minutes | — |
| Castable Time at 77°F | 45 | minutes | — |
| Weight per Gallon at 77°F | 8.75 | lbs | — |
| Specific Gravity, 77°F (25°C) | 1.05 | — | — |
Storage & Handling
- Handling and Storage
STYPOL® 040-4917 has a shelf life of 120 days from date of manufacture when stored at 73°F or below in a closed, factory-sealed, opaque container and out of direct sunlight. The shelf life is cut in half for every 20°F over 73°F.