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White Two Part RTV2 Platinum Cure Silicone Rubber Good Flowability

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White Two Part RTV2 Platinum Cure Silicone Rubber Good Flowability

Country/Region	china
City & Province	dongguan guangdong
Categories	Nitrile Rubber

Product Details

Good Flowability High Strength Low Shrinkage RTV-2 Liquid Platinum Cure Silicone Rubber For Making Cake Decorating Molds

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 A20 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.

Platinum cure silicone rubber, also called addition cure silicone, are two-component high tear strength and flexible mold or casting compounds. They are recommended as a mold material for casting polyurethane, epoxy, or polyester resins, wax and a wide range of other casting materials. They exhibit extremely low shrinkage and high physical properties. These rubbers are chemically sensitive to latex, sulfur, and certain other materials. Platinum cure silicone can also be used to cast prosthetics for special effects makeup and medical training devices.

Features

Two-part platinum-cured (addition-cure) silicone rubbers
Room temperature curing (RTV)
Shore Hardness Options: A10-A60
Do not exhibit shrinkage upon curing so they are useful for casting dimensionally stable parts for highly accurate prototyping and model making applications
Molds do not require release agents when casting most materials
Cured molds have a long library life
Pourable or brushable (thicken with thixo agent)
High-strength
Excellent chemical resistance
Reproduces fine details
Can be accelerated for rapid cure
Ideal for the most demanding resin casting applications

Applications

Label manufacturing, Molding applications requiring low shrinkage e.g., jewelry, automotive, plaster, cement, cake decorations, etc.

Technical Properties

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)	3.8
Elongation(%)	600
Tear Strength(N/mm)	16
Linear Shrinkage (%)	0.1

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.

NOTE ON CURE INHIBITION: Sulfur/tin/amine-contaminated materials and tools will cause cure inhibition in platinum-cured silicone rubbers, which means that the rubber that is in contact with the contaminated surface will remain gummy or uncured. Make sure to test cure the rubber on your surface before full-scale application. Use a polyurethane or tin-cured silicone rubber if you know that you’ll be working with any of these inhibitors.

Packaging

20kg per drum, 200kg per drum

Storage and shelf life
MC Silicone MCPLA -H 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.