25 Shore a Molds Making Platinum Cure RTV2 Liquid Silicone Rubber

• Raw Material: Synthetic Rubber
• Material: Silicone Rubber
• Appearance: Liquid
• Form: Liquid Rubber
• Item: Mcpla-L25A/B
• Color: Translucent
• Model NO.: MCPLA-L25A/B (25 shore A )
• Mixing Ratio: 1:1 Liquid Silicone Rubber
• Mixed Viscosity: 7000~9000 Cps
• Working Time: 30~40mins
• Curing Time: 4~6 Hrs
• Hardness: 25 Shore a Liquid Silicone
• Tensile Strength: 3.8 MPa
• Tear Strength: 18 N/mm
• Elongation: >550%
• Shrinkage: <0.1%
• Shelf Life: 12 Months
• Transport Package: 20kg/Drum, or 200kg/Drum
• Specification: REACH, MSDS, SGS
• Trademark: MC SILICONE
• Origin: Guangdong
• HS Code: 39100000
• Production Capacity: 8000kg/Day

Product Description

25 Shore a Molds Making Platinum Cure RTV2 Liquid Silicone Rubber

 

Product Description

MCPLA-L Series Platinum-cure liquid silicone rubber also known as addition-cure silicone mold rubber,  two component elastomer cross-linking at room temperature. The polymerization can be accelerated by heat. The silicone components are delivered as liquids, which once mixed and cured  into translucent, elastic and resistant material. platinums silicones exhibit the lowest long-term shrinkage and have the longest library life of all mold rubbers. While good for making molds for casting a variety of materials.

Product Parameters

Features

1. Easy Curing: polymerizes at room temperature (23C). 
2. High tear and tensile strength
3. Long shelf life with low shrinkage (0.1%)
4. Fast mixing (1:1) and easy processing due to the low viscosity

Applications

1.RTV2 platinum cure silicone rubber is commonly used for making molds for industrial parts,various materials such as resins, plaster, and concrete, decorative objects.

 

2.Special Effects: RTV2 platinum cure silicone rubber is used in the film and entertainment industry for creating special effects and prosthetics.

 

3.Food and Confectionery: RTV2 platinum cure silicone rubber is used in the food and confectionery industry for creating molds for chocolates, candies, and other food items.

Instruction of using Silicone

Processing and Instructions of MCPLA-L Series Addition Cured Liquid Silicones Rubber

Step 1
The ideal working temperature is around a constant 25°C. Best results can be obtained at constant temperatures between 21°C and 26°C, in a clean, dry, dust-free environment. Avoid working in high humidity.

Step 2
Measure product in accordance with your intended use. Prepare 1 part A to 1 part B by weight and pour into a clean, smooth-sided container large enough to hold all the liquid and allow room for mixing.

Step 3
The material must be mixed thoroughly for at least 5 minutes. make sure to scrape the container sides, bottom, and corners as you mix. Be careful not to whip excessive air into the mixture.

Step 4

Prepare a container(not silicone material),add the item and keep them face up.
Pour the mixed silicone onto the container and distribute evenly to cover the top of the item by at least 6-7mm

Step 5
Adjust the position and then let it cure, the bubbles will melt gradually.

Step 6
Pull the item out of the mold after 24 hrs

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.

Shelf Life and Storage

RTV2 Silicone rubber must 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 guidelines:

Store the original packing tightly sealed and at a temperature below 30 C
Use the product as soon as the packaging has been opened.
 

FAQ

 

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, ether 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 .

MINGCHENG GROUP LIMITED

TYPICAL PROPERTIES of liquid silicone rubber

Item No.: PLA-L25A/B
Color : Translucent
Specific Gravity(g/cm3, approx. ) : 1.08~1.10
Proportion(A: B): 1:1
Mixing viscosity(at 23° Capprox. )7000~9000Cps
Max working time(at 23° C, minutes) 30~40
De-molding time(at 23° C, hrs, approx. ) 4~6
Hardness (after 24 h)25 Shore A
Tensile Strength(Mpa, after 24 h) 3.8
Tear Strength (N/mm) 16
Elongation (%) ≥ 550