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BJB Enterprises TC-5040-AB

BJB Enterprises TC-5040-AB is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation applications, pressure pads, gaskets, and various other types of parts. When this rubber is used to make certain types of molds, it is translucent enough to see through when casting into the mold cavity.

Polymer Name: Silicone Elastomer

Processing Methods: Casting

End Uses: Gaskets, Mold Making

Features: Translucent

Tear Strength: 16.625 - 16.625 kN/m

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Identification & Functionality

Chemical Family
Polymer Name
Technologies

Features & Benefits

Materials Features

Applications & Uses

Markets
Cure Method
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Appliation Details

INHIBITION:

Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulfur and organometallic salt containing compounds such as organic rubbers and condensation cured RTV silicone rubbers. Inhibition may easily be determined by brushing a small quantity of TC-5040 A/B over a localized area of the surfaceto be reproduced. If the TC-5040 A/B is gummy or uncured after the curing time, then you know the mold surface is acting as an inhibitor. Molds made from wood, plaster, metal or plastic should not cause inhibition if they are clean. To insure against possible problems, it is advisable to seal the surface with RF-5215 or other appropriate sealer. Contact BJB’s technical sales for additional information.

Properties

Physical Form
Appearance
Translucent
Physical Properties
ValueUnitsTest Method / Conditions
Hardness35 - 45Shore AASTM D2240
Density1.09g/ccASTM D792
Cubic25.7Inches per Pound-
Tensile Strength865psiASTM D412
Elongation540%ASTM D412
Tear Strength95pliASTM D624 Die B
Shrinkage LinearNilin/inASTM D2566 (1” depth)
Coefficient of Thermal ExpansionTBDin/in/°FASTM831
Typical Properties
ValueUnitsTest Method / Conditions
Mix Ratio by weight (Part A)100--
Mix Ratio by volume (Part A)100--
Specific Gravity (77°F (25°C), Part A)1.09--
Color (Part A)Colorless--
Viscosity (77°F (25°C), Part A)125000-Brookfield
Mixed Viscosity (77°F (25°C))65000cpsBrookfield
Work Time (100g mass, 77°F (25°C))40 - 45 minutes--
Gel Time60 - 65 minutes--
Demold Time (77°F (25°C))16 - 24 hours--
Mix Ratio by weight (Part B)10--
Mix Ratio by volume (Part B)11--
Specific Gravity (77°F (25°C), Part B)0.99--
Color (Part B)Colorless--
Viscosity (77°F (25°C), Part B)550--

Safety & Health

Safty Precaution

Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged contact on the skin maycause an allergic reaction.Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.

Packaging & Availability

Packaging Type

Storage & Handling

Storage

Store ambient temperatures, 65-80°F (18-27°C). Unopened containers will have a shelf lifeof 12months from date of shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.