RTV2 Addition Liquid Silicone Rubber For Flowerpot Molds Making
RTV2 silicone rubber is a two component 1:1 elastomeric
cross-linking at room temperature. The polymerization can be
accelerated by heat (max. 150 C degree). The silicone components
are delivered as liquids, which once mixed and cured transform into
a elastic and resistant material. Polymerization occurs without
formation of heat.
Technical Properties
| Item No. | MCPLA-L30A/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.) | 4-6 |
| Hardness Shore A(after 24 h) | 25 |
| Tensile Strength(Mpa,after 24 h) | 3.8 |
| Elongation(%) | 580 |
| Tear Strength(N/mm) | 25 |
| Linear Shrinkage (%) | 0.1
|
ADVANTAGES
Custom color
Convenient to operate with the RTV property
Easy to mix due to the low viscosity (7000~9000Cps)
High duplication with high tear and tensile strength
Long shelf life with low shrinkage
Excellent chemical resistance, tempereature resistant
Can be accelerated for rapid cure
Food Grade, Skin safe
Processing and Instructions of Addition Cure Silicones
1. Mixing the two components
According the mixing ration 10:1 or 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:Contamination from sulfur (e.g., sulfur-based clay), amines, tin
compounds, cured polyester resin, some paints and some silicone
rubbers may inhibit surface cure of platinum-cured rubbers.
Apply a release agent, Although not usually necessary, a release
agent will make demolding easier when casting into most surfaces.
PACKAGE AND STORAGE
PACKAGE OF MC Silicone MCPLA -L Series: 20kg/drum,200kg/drum, sea freight,air freight,land freight and expresss is available.
MC Silicone MCPLA -L 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. In
order to preserve best properties it is recommended to follow
strictly the following guide 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.
About US
DONGGUAN MINGCHENG GROUP LIMITED is dedicated to manufacturing and
a wide variety of mold making and casting materials, such as RTV-2
liquid silicone mold rubbers, liquid polyurethane mold rubbers,
silicone fluid, electronic potting silicone compound, foams,
release agent and so on. These materials can be used for
reproduction of any original model to cast PU resin, polyester
resin, epoxy resin, concrete, plaster, foam, wax, soap and all the
other decorative mouldings.
