GT Products©2241T is a translucent pourable two-component silicone rubber compound designed for making flexible molds. GT Products©2241T has a low durometer, and is easily stretched off of parts. GT Products©2241T features a low viscosity.
GT Products©2241T is recommended for repetitive production of intricate shapes cast in epoxy or urethane resins. It is also used for potting electronic components protecting sensitive assemblies against thermal shock and vibration. It is also used as an optical coupling adhesive.
GT Products©2241T base is mixed with catalyst 2241 in a 10 : 1 ratio by weight. Add the catalyst into the base to assure complete dispersion. Mixing may be done by hand with a spatula or by machine. When machine mixing avoid prolonged high speeds to prevent premature cure. Avoid stirring in an excessive amount of air. Care must be taken to avoid contaminating unused base with the mixed material or with mixing tools that have been in contact with the catalyst.
TYPICAL PROPERTIES
Color: Base Catalyst Translucent Translucent
Specific Gravity Mixed: 1.12
Tensile Strength = 750 psi Tear Strength = 140 pli Hardness = 40 Shore A Elongation = 350% Brookfield Viscosity = 120,000 cps Pot Life = 60 – 75 min
Tensile Strength = 850 psi Tear Strength = 175 pli Hardness = 45 Shore A Elongation = 350% Brookfield Viscosity = 120,000 cps Pot Life = 60 – 75 min
Air entrapped during mixing should be removed to prevent voids in the cured product. De-air the mixed material under a vacuum of 25 mm (29 inches) of mercury. The mixture will expand to about four times its volume, crest and recede to about the original level as the bubbles break. Degassing is usually complete about two minutes after frothing subsides.
GT Products 2241T will cure sufficiently in eight hours at room temperature (75°F) to be handled. It will reach 90% of ultimate cure in 24 hours at room temperature. For full cure an additional 1-2 days at room temperature or an elevated temperature cure is required.
Typical Cure Times
75°F 24 hr. 100°F 95 min. 200°F 5 min.
GT Products 2241T will remain useful for six months when stored in the original unopened containers at temperatures below 80°F (27°C).
GT Products 2241T is an addition (platinum catalyst) cure system. It will cure in contact with most clean dry surfaces. Certain materials such as butyl and chlorinated rubbers, sulfur containing materials, amines and condensation (metal soap catalyst) RTV silicones can cause cure inhibition. This inhibition will manifest itself as a sticky interface with the substrate. Inhibition can often be minimized by warming the substrate to evaporate contaminates, neutralizing and rinsing, or by the use of a suitable barrier. A sample patch test is recommended.
The above data is based on typical experience and should not be used for specification writing. Suitability of GT-Products 2241T for a specific application should be determined under actual use conditions. No warranty, expressed or implied, is hereby made.
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GT Products inc. 501 Industrial Blvd. Grapevine, TX 76051 Phone # 800-221-0866 Fax # 817-421-1211