ELASTOSIL® RT 402, Room Temperature Curing Silicone Rubber (RTV-2)
ELASTOSIL® RT 402 is a pourable, condensation-curing, two-component
silicone rubber that vulcanizes at room temperature.
Main application: Making pads for pad printing, antistatic behaviour
Properties
• Very good flowability and self-deaeration
• Very low hardness (Shore A approx. 11)
• Good tear strength
• Excellent transfer characteristics for printing inks
• Antistatic finish
Specific features
• Antistatic
• Condensation-curing
• Fast curing
• Two-component
Properties
Viscosity mixed with 3% T12 @23°C: 13.000 mPa.s
Potlife @ 23°C: 75 minutes
Curing time @23°C: 5 hours
Color: Light Gray
Density cured @23°C: 1,28 g/cm3
Hardness: Shore A 11
Tensile strength : 2 N/mm²
Elongation at break: 350%
Tear strength: > 3 N/mm
We offer Elastosil RT 402 in combination with the hardener Catalyst T 12.
Application details
ELASTOSIL® RT 402 has been particularly designed as a base material for making printing pads.
A special feature of ELASTOSIL® RT 402 is that it contains an antistatic additive for fast dissipation of static charge that has built up on the pad surface. This feature is particularly important for printing on highly sensitive electronic parts such as CPUs.
Processing
ELASTOSIL® RT 402 is exclusively processed with 3 wt % Catalyst T 12, based on the total amount of the mass (rubber base or base plus silicone fluid).
To ensure homogeneity of the material, the components must be stirred thoroughly before they are removed from or processed in their containers, in order to uniformly disperse any fillers that might have settled during storage. It is advisable to thoroughly mix rubber base and fluid before the catalyst is incorporated.
When diluting ELASTOSIL® RT 402 with silicone fluid, it is advisable to thoroughly mix rubber base and fluid before the catalyst is incorporated
Dilution charts:
The following table shows the hardness of ELASTOSIL® RT 402 as a function of the added amount of Wacker Silicone Fluid AK 35 for Durometer Types Shore A and Shore 00.
Safety requirements
Being a condensation-curing silicone rubber, ELASTOSIL® RT 402 contains only constituents that over many years have
proved to be neither toxic nor aggressive. Special handling precautions are therefore not required, i.e., only the general
industrial hygiene regulations apply.
Catalyst T 12 contains a tetraorganotin compound, is flammable (flash point > 50 °C) and may cause irritation in contact
with the eyes and skin. Appropriate protective measures are required.
If you often work with the silicone, it is recommended to wear gloves during processing and to ventilate the room well. For safety instructions, always refer to the safety data sheet.
Further important safety information for T 12
H-Code Hazard Statements
H226 Flammable liquid and vapour.
H361d Suspected of damaging the unborn child.
H373 May cause damage to organs through prolonged or repeated exposure.
P-Code Precautions
P201 Obtain special instructions before use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P243 Take action to prevent static discharges.
P260 Do not breathe dust/ fume/ gas/ mist/ vapours/ spray.
P280 Wear protective gloves/protective clothing/eye protection.
P314 Get medical advice/ attention if you feel unwell.
P405 Store locked up.
Documentatie
EN - Product information Wacker Elastosil M 4514 A.pdf
EN - Safety data sheet Elastosil M 4514 A.pdf
MSDS Wacker Catalyst T 12 EN.pdf
