Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Key Features
- Low modulus minimizes stress on parts and components
- Fast room temperature cure
- Potted or encapsulated assemblies can be repaired with modest effort
- Primerless chemical adhesion at room temperature to many substrates
Applications & Uses
- Applications
- Application Area
- Cure Method
- Use and Cure Information
Important
- In order to achieve optimum performance, the same lot number of the A and B components should be used. Mixed lots may not obtain the performance criteria listed on the TDS or Certificate of Analysis.
- The 'A' part of the product contains the platinum catalyst; great care should be taken when using automatic dispensing equipment. Please ensure that it is not contaminated by residual hydride containing rubber (Part B) in the dispensing equipment, as curing will result. If in doubt, it is advised to thoroughly purge the equipment with a suitable hydrocarbon solvent or silicone fluid.
Mixing
Both the ‘A’ and ‘B’ parts should be well stirred to ensure the material is uniform and any settled the fillers have been remixed. Place the required amount of ‘A’ and ‘B’ parts by weight at the mix ratio shown opposite, in a clean plastic or metal container of approximately 3 times their volume, and mix until the color of the mixture is uniform. For best results, we recommend degassing. Degas by intermittent evacuation, the larger volume of the mixing vessel helps prevent overflow during this operation. In the case of automatic dispensing with static mixing head, the two components should be degassed before processing. Recommended vacuum conditions are 30- 50 mbar intermittently over 5-10 minutes. Cast the mixture either by gravity or pressure injection.
Inhibition of Cure
Great care must be taken when handling and mixing all addition cured silicone elastomer systems, ensuring that all the mixing tools (vessels and spatulas) are clean and constructed in materials which do not interfere with the curing mechanism. The cure of the rubber can be inhibited by the presence of compounds of nitrogen, sulfur, phosphorus and arsenic; organotin catalysts and PVC stabilizers; epoxy resin catalysts and even contact with materials containing certain of these substances e.g. molding clays, sulfur vulcanized rubbers, condensation cure silicone rubbers, onion and garlic.
Curing Conditions
- The data offers a guide to the rate of cure at various temperatures, mixing of the components at temperatures between 15 and 25°C is recommended to ensure adequate pot life for degassing and handling. The pot life can be extended to several hours by chiling the components before mixing.
- It is important to check the compatibility in preliminary tests if unknown substrates are used.
Properties
- Flame Rating
- Physical Form
- Typical Properties
- Cured Properties
- Uncured Properties
- Uncured Product Property
Color A Transparent yellow Color B Opaque black Cure Profile 30 min at 70°C, 60 min at room temperature
Cure Type Addition Mix Ratio By Weight 1:1 Rheology Liquid, Newtonian Self Bonding Yes
| Value | Units | Test Method / Conditions | |
| Mix Ratio | 1:1 | — | — |
| Shore 00 Hardness | 50.0 | — | Durometer |
| Value | Units | Test Method / Conditions | |
| Hardness Shore 00 | 45 - 60 | — | ASTM D 2240-95 |
| Working Temperature Range | -55 - 204 | °C | — |
| UL File Number | E205830 | — | — |
| Mixed Viscosity | 375.0 | cps | — |
| Refractive Index | 1.41 | — | — |
| Value | Units | Test Method / Conditions | |
| Gel Time (at 25°C) | 5 - 8 | Minutes | — |
| Specific Gravity (Component A) | 0.97 | — | — |
| Specific Gravity (Component B) | 0.97 | — | — |
| Viscosity (Component A) | 275.0 | cP | Brookfield |
| Viscosity (Component B) | 550.0 | cP | Brookfield |
| Viscosity (Mixed) | 390.0 | cP | Brookfield |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Packaging Type
- Packaging
CHT Gels are available in a variety packaging including bulk containers.
Storage & Handling
- Shelf Life
- 24 Months
- Storage Conditions
Maximum storage temperature is 38 °C / 100 °F