1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
Description of 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
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 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
Good flowability High tear and tensile strength Long shelf life
with low shrinkage Fast mixing Easy processing due to the low
viscosity
Applications
Label manufacturing, Molding applications requiring low shrinkage
e.g., jewelry, automotive, plaster, cement decorations, toys and
dolls, etc.
Applications of 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
Label manufacturing, Molding applications requiring low shrinkage
e.g., jewelry, automotive, plaster, cement decorations, toys and
dolls, etc.
Technical Properties of 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
| 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 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
20kg per drum, 200kg per drum.
Storage and shelf life of 1:1 liquid platinum Silicone Rubber high temperature resistance
silicone for Resin Jewelries molds making
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.
