| Item No. | MCPLA-L20 A/B |
| Appearance | Viscous liquid |
| Color | Translucent/skin tone |
| 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) | 3.5 |
| Elongation(%) | 550 |
| Tear Strength(N/mm) | 15 |
| Linear Shrinkage (%) | 0.1 |
Platinum Cured Liquid Silicone Rubber RTV2 Translucent Silicone
Ratio 1:1
What is MCPLA-L20A/B RTV-2 platinum cured silicone rubber
MCPLA-L25A/B RTV2 platinum cured liquid silicone rubber is a
two-part, high-performance elastomer that is used for mold making,
casting, and other industrial applications. It is called "platinum
cured" because it uses a platinum catalyst to initiate the curing
process,The silicone components are delivered as liquids, which once mixed
and cured transform into elastic and resistant material.
What are the Applications of MCPLA-L20A/B RTV-2 platinum cured
silicone rubber
#Life casting, Prosthesis Hands, ect.
#Molding applications requiring low shrinkage e.g., jewelry,
automotive,
#plaster, cement, cake decorations,candle, soap etc.
What are the Advantages of MCPLA-L20A/B RTV-2 platinum cured
silicone rubber
#Easy to Operate : Due to the Room Temperature Cured feature and Low Viscosity,
It's easy to use platinum liquid silicone rubber for your DIY
Projects at home. No need for vacuum Pumping .
#High Tear Strength: RTV2 platinum cure silicone rubber has a high tear strength,
making it ideal for making complex molds that require multiple
demolding cycles.
#Easy Release: RTV2 platinum cure silicone rubber has excellent release
properties, which means that the mold or casting can be easily
removed from the mold without causing damage to the final product.
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:
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.
Packages of RTV-2 platinum cured silicone rubber
20kg per drum, 200kg per drum
Storage and shelf life
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.
FAQ of RTV-2 platinum cured silicone rubber
Q1: Why the curing time of platinum silicone varies in environment
with
different temperature ?
Platinum (addition) cured silicone rubber,Which with platinum
catalyst and uses heat to transform from liquid to solid rubber. Therefore, platinum cured
silicone rubber is sensitive to temperature, platinum systems are often cured quickly
with heat, although they can also be formulated to cure at low temperatures
and room temperature.
Q2:why the bottom and sides of platinum silicone molds are still
gummy?
platinum silicone rubber requires accurate and careful mixing. The
material must be mixed thoroughly for at least 3~5 minutes. make sure to scrape the
container sides, bottom, and corners as you mix.
Q3: Why the platinum silicone rubber do not cure?
Platinum-cure silicone rubbers are critically sensitive to some
materials and will not cure under any circumstances when exposed. like the materials
below:
#Natural rubbers vulcanized with sulfur
#RTV elastomer is catalyzed with metal salts, e. G. Tin compounds
#Epoxy catalyzed with amines
#Certain organic solvents, such as Ketones, alcohols,etc.
Q4: Is platinum silicone food safe?
yes! It's safe to contact Food and skin, which is suitable for
making food molds and making Prosthetics .
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