Food Grade Platinum Cure Liquid RTV-2 Silicone Rubber for Chocolate
Mold Making
Product description
Two-component addition type silicone rubber Silicone Rubber is a two-part, platinum-catalyzed, liquid silicone
system that cures (RTV) to a Shore A05 rubber. The polymerization can be accelerated by heat. 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.
Applications
Making molds for chocolate,candy, cake decorations, etc.
Features
Very soft
Good flowability
Odorless
Long casting
Skin safe
Easy processing - mixing ratio 1 : 1
Adjustable working time and curing time
Technical Properties
| Item No. | MCPLA-L10 A/B |
| Appearance | Viscous Liquid |
| Color | Translucent |
| Viscosity ( cps,approx.) | 7000-9000 |
| Mix ratio (A:B) | 1:1 |
| Working time(at 25℃ ,minutes) | 30-45 |
| Curing time(at 25℃,hrs,approx.) | 6-8 |
| Hardness Shore A(after 24 h) | 10 |
| Tensile Strength(Mpa,after 24 h) | 2.5 |
| Elongation(%) | 650 |
| Tear Strength(N/mm) | 16 |
| Linear Shrinkage (%) | 0.1 |
Processing and Instructions of Platinum 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. 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.
3.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)
Apply a release agent, Although not usually necessary, a release
agent will make demolding easier when casting into most surfaces.
Packaging
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. In
order to preserve best properties it is recommended to follow
strictly the following 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.
If you have any questions,please contract us!
