Silpak, Inc

Silicone Platinum RTV

R-2230 Clear (30A Shore)

R-2230 A/B  Two-Part, Platinum RTV (Addition Cure) Clear silicone rubber designed for moldmaking, embedding, electrical applications, and thermal expanding tools. The controlled coefficient of thermal expansion makes R‑2230 A/B ideal for casting pressure pads or to be used as an advanced composite tooling rubber. R-2230 A/B RTV is great for mold tooling where precise parting lines need to be cut or to use as a visual aid for injecting resin.

Physical Properties (TYPICAL VALUES):
Uncured Compound                       Cured Compound 24 hrs. @ 77F (25C)
Color: Clear                                  Specific Gravity: 1.08 
Mix Viscosity @ RT: 38,000             Durometer: 35 +/-5
Mixing Ratio A/B: 10/1                   Tear Strength: 85
                                                  Tensile Strength (PSI): 750            
                                                  Elongation %: 350

Thermal Conductivity BTU‑FT F: 8.0 + 102
Coefficient of Thermal Expansion in F: 11.0 x 10^-4

Mixing Instructions:
The base and curing agent are mixed just before using. Mix 10 parts base to 1 part curing agent by weight. Automatic mixing equipment or manual mixing may be used to combine base and curing agent. Immediately after mixing, place the material in a vacuum chamber to remove trapped air. As the vacuum is drawn, the material will expand as much as four times its original volume. Remove from vacuum chamber and pour very gently, so as not to incorporate air into the material.

Inhibition:
Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulfur containing organo-metallic salt containing compounds found in organic rubbers, many condensation cure RTV’s, chloride solvents, and Epoxy amines. Inhibition may easily be determined by brushing a small quantity of R2230 A/B over a localized area of the surface to be reproduced. If the R‑2230 A/B is gummy or uncured after the curing time, then the mold surface is acting as an inhibitor. 

C U R I N G  C H A R T:

The information and data contained herein are based on information we believe reliable. Each user of the material should thoroughly test any application and independently conclude satisfactory performance before commercializing. Suggestions of uses should not be taken as inducements to infringe on any particular patent.