30 Shore A RTV2 Liquid Silicone Rubber For Gypsum/Plaster Molds Making
Brand Name:MC silicone
Certification:MSDS , SGS， Reach
Model Number:MCPLA-L30A/B
Minimum Order Quantity:200kg
Delivery Time:5-10 working days
Payment Terms:L/C, , T/T, Western Union, PayPal , ,
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Verified Supplier
Location:
Dongguan Guangdong China
Address:
No.2, Zhouliao Road, Langzhou Industrial Zone, Changping, Dongguan, Guangdong, China
Supplier`s last login times:
within 30 hours
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Product Details
DESCRIPTION
RTV silicone rubber is a two component 1:1 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
elastic and resistant material. Polymerization occurs without
formation of heat.
echnical 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
High transparency
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
Can be accelerated for rapid cure
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
30 Shore A RTV2 Liquid Silicone Rubber For Gypsum/Plaster Molds Making
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