Precision Mold Making Silicone Rubber
Good Dimensional 4.5Mpa Stability Precision Mold Making Silicone Elastomer Rubber
Description
Room Temperature Curable, Addition-curing Two-component Silicone Rubber.
Characteristics:
- Good fluidity
- Low shrinkage
- Good dimensional stability
Application:
- Resin Matrix Composite mold take shape.
- Production of precision mold, such as oil drill, supercharger impeller.
Typical Properties
| Properties | Test Method | Unit | R-311W |
| Uncured | Appearance | Visual | A | | White/ Translucent |
| B | | Red |
| Viscosity, after stirred at 23°C | GB/T 2794-1995 | mPa.s | 8×104 |
| Mixing ratio | | A:B | 10:1 |
| Pot life, 25°C | | h | 1.5 |
| Cured | Tensile strength | GB/T 528-2009 | MPa | 4.5 |
| Elongation at break | GB/T 528-2009 | % | 400 |
| Tear strength | GB/T 529-2008 | kN/m | 15 |
| Hardness, Shore A | GB/T 531-1999 | | 30-40 |
| Linear shrinkage | | % | 0.1 |
| Coefficient of thermal expansion | | 1/℃ | |
These figures are only intended as a guide and should not be used in preparing specifications.
How to use
1. Weight: According to weight ratio to take rubber base and curing agent. The amount of curing agent will decide pot life longer or shorter, and the final performance of the vulcanizate will also correspondingly change.
2. Mixing: Fully mix two components, pay attention to scratch bottom and wall of container.
3. Deaeration:The mixture together with its container should be placed in vacuum degassing tank to be degassed in order to guarantee no air bubbles in the curing rubber. The mixture surface location will rise to 3~4 times higher than original and automatically break bubbles to collapse.
Please hold vacuum status more 4~6 minutes, then release.
4. Pouring: Pour the mixed rubber by manual or mechanical operation. And it is better to do vacuum degassing again after it.
5. Curing: The curing time is 24hours at 25℃. Additional vulcanization of other 1 hour at 100℃ and 1 hour at 200℃ is needed before use.
Packing, Storage & Shipping
The rubber base is provided in a plastic drum with a net weight of 20kg, while the curing agent is supplied in a separate plastic bottle or drum.
To preserve the quality of the product, it must be stored in a cool and dry location and kept away from substances such as acid, alkali, and metal organic salt. If stored in the original container with a seal, the rubber base and curing agent should have a minimum shelf life of six months.
There are no restrictions on shipping this product.
Attention
To prevent inactivation caused by prolonged exposure to air, the curing agent must be securely covered with a cap after each use. If a significant amount of sediment is present, it is a sign that the curing agent is no longer effective. It is suggested to distribute the curing agent into vials for regular usage.
The curing agent contains tetraethoxy-silane, which is flammable (flash point 40.6℃) and can cause skin and eye irritation. Sufficient protective measures are necessary to handle this substance.
Limited Warranty Information
The information provided in this brochure is based on our current knowledge, but does not relieve the user of the responsibility to inspect all supplies upon receipt thoroughly. We reserve the right to modify product specifications based on technological advancements or new developments.
Due to uncontrollable processing conditions, particularly when incorporating raw materials from other companies, it is recommended to conduct preliminary trials to verify the suggestions provided in this brochure. These suggestions do not exempt the user from investigating the possibility of infringing on third-party rights and, if necessary, clarifying their position. The recommendations for product use do not imply any warranty, whether expressed or implied, regarding the fitness or suitability of the product for a specific purpose.
Product Tags:
|
|
Good Fluidity 4.5Mpa Elastomer Silicone Liquid Rubber For Mold Making Images
|
