20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
Description of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
MC Silicone MCPLA Addition Cure Series is a two component elastomeric cross-linking at room temperature. The polymerization can be accelerated by heat (max.1500 C). The silicone components are delivered as liquids, which once mixed and cured transform into a transparent, elastic and resistant material. Polymerization occurs without formation of heat.
Features of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
Good flowability
High tear and tensile strength
Long shelf life with low shrinkage
Fast mixing
Easy processing due to the low viscosity
Applications of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
Label manufacturing, Molding applications requiring low shrinkage e.g., jewelry, automotive, plaster, cement decorations, toys and dolls, etc.
Technical Properties of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
| Item No. |
MCPLA-L20A/B |
| Appearance |
Viscous liquid |
| Color |
Translucent |
| Viscosity ( cps,approx.) |
7000-9000 |
| Mix ratio (A:B) |
1:1 |
| Working time(at 25℃ ,minutes) |
30-40 |
| Curing time(at 25℃,hrs,approx.) |
6 |
| Hardness Shore A(after 24 h) |
20 |
| Tensile Strength(Mpa,after 24 h) |
4.5-4.8 |
| Elongation(%) |
550 |
| Tear Strength(N/mm) |
18-20 |
| Linear Shrinkage (%) |
0.1 |
Processing and Instructions of Addition Cure Silicones
1. Mixing the two components
According the mixing ration 1:1 weighting A and B, the two components may be thoroughly mixed either by hand or using a low-speed electric to minimize the degassing of bubbles and to avoid any temperature increase. Note: It is also possible to use a special mixing and dispensing machine for the silicone components, further information is available upon request.
2. Moulding
The mixture should be degassed preferably at 30 to 50 mbar to eliminate any entrapped air. If a dispensing machine is used, the two components are degassed separately prior to mixing. The silicone mixture expands to 3-4 times of its initial volume and bubbles rise to the surface. The bubbles progressively disappear and the mixture returns to its initial volume after 5 to 10 minutes. Wait a few minutes to complete the degassing and then flash the vacuum. The silicone is ready for pouring, either by gravity or under low pressure. Note: Flashing the vacuum once or twice accelerates the degassing. It is recommended to use a container with a high diameter/height ratio (3 to 4 times of the initial volume)
3. Polymerisation
The curing may be slowed down at lower temperature or accelerated by applying heat. Note: in general contact with certain materials can inhibit the cross linking of RTV.
Natural rubbers vulcanized with sulfur
RTV silicone compound catalyzed with metal salts, e.g. Tin compounds
PVC stabilized with tin salts and additives
Epoxy catalyzed with amines
Certain organic solvents, e.g. Ketones, alcohols, etc.
Packaging of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
20kg per drum, 200kg per drum.
Storage and shelf life of 20 Shore A Platinum Cure Silicone Rubber For Soap Silicone Mold
MC Silicone MCPLA Series should be used within 12 months from the manufacturing date. Beyond this date, MC silicone no longer guarantees the products confirms with the sales Specification.To preserve best properties, please followthe recommended guild lines. Store the original packing tightly sealed and at a temperature below 30 degree Celsius. Use the product as soon as the packaging has been opened.
