Silpak, Inc

Silicone Platinum RTV

R-2364 (65A Shore)

R-2364 A/B Two-Part, Platinum RTV (Addtion Cure) silicone rubber designed for tool hardness, physical properties and chemical resistance. R-2364 A/B has excellent high tear and tensile properties.  Typical applications would be relief type molds because of its firmness and molds with deep undercuts, which are tough to de-mold.

Physical Properties (TYPICAL VALUES):
Uncured Compound                       Cured Compound 24 hrs. @ 77F (25C)
Color: Blue-mixed 
Mix Viscosity @ RT: 100,000           Specific Gravity: 1.28
Mixing Ratio A/B: 10/1                   Durometer: 65 
                                                  Tensile Strength (PSI): 650            
                                                  Tear Strength (PSI): 110
                                                  Elongation %: 250

Coefficient of Thermal Expansion (cm/cm/ ºc) 8.4 x 10^-4

Conditions of Test:
Post cure of 1 hour @ 400F after room temperature cure 24 hours.

Mixing Instructions:
The base and curing agent are mixed just before using. Mix 100 parts base to 10 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.
*Note - If settling should occur at the bottom of container do not mix material manually. Please call for further instructions.

Inhibition:
Certain materials will cause inhibition or neutralizing of the curing agent: sulfur and organo-metallic salt containing compounds found in organic rubbers, and many condensation cure RTV, chloride solvents, and amines-epoxy. Inhibition may easily be determined by brushing a small quantity of these materials over a localized area of the part to be reproduced. If the material remains gummy or uncured after the curing time, then the part’s surface is acting as an inhibitor. **See Addition Cure Technical Data Sheet for inhibiting substances.

Curing Chart:

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.