| Silicones - Addition Cure
RTVS 27-17
LOW VISCOSITY, RTV SILICONE/POTTING COMPOUND
DESCRIPTION
RTVS 27-17 is a low viscosity, economical, UL 94V-0 Flame Retardant, general purpose, reversion resistant RTV Silicone. The equal ratio makes RTVS 27-17 ideal for automatic dispensers. With the ability to cure rapidly at elevated temperature, RTVS 27-17 combines the virtues of low temperature flexibility, excellent electrical properties, high temperature resistance and repairability.
| PROPERTIES-UNCURED: |
| |
Part A |
Part B |
|
| Color, visual |
Black |
Buff |
|
| Viscosity, cps |
4,500 |
3,000 |
ASTM D 1084 |
| Specific Gravity |
1.41 |
1.41 |
|
| Mix Ratio (by weight or volume) |
1:1 |
|
| Mixed Viscosity, cps |
3,000 |
ASTM D 1084 |
| Pot Life @25°C, hours |
1 |
|
| Shelf Life @25°C, months |
12 |
|
| PROPERTIES-CURED: |
| PHYSICAL: |
| Hardness, Durometer (Shore A) |
50 |
ASTM D 2240 |
| Tensile Strength, psi |
500 |
ASTM D 412 |
| Tensile Elongation, % |
150 |
ASTM D 412 |
| Tear Strength, Die B lb/in |
25 |
ASTM D 624 |
| Coefficient of Thermal Expansion, °C |
23 x 10-5 |
ASTM D 624 |
| Thermal Conductivity, BTU-ft/(ft2)(hr)(°F) |
0.18 |
|
| Thermal Conductivity, BTU-in/(ft2)(hr)(°F) |
2.16 |
|
| Service Temperature, °C |
-55 to 204 |
|
| ELECTRICAL: |
| Dielectric Strength, volts/mil |
450 |
ASTM D 149 |
| Dielectric Constant, 1 KHz @25°C |
3.15 |
ASTM D 150 |
| Dissipation Factor, 1 KHz @25°C |
0.008 |
ASTM D 150 |
| Volume Resistivity, ohm-cm |
1.0 x 1015 |
ASTM D 257 |
MIXING INSTRUCTIONS:
1. Premix RTVS 27-17 Part A and Part B in original containers before withdrawing any material. Some light but soft settling will occur, which readily redisperses.
2. Measure equal portions, either by weight or volume, of Part A and Part B.
3. Mix thoroughly, scraping both the bottom and the sides of mixing container.
4. Evacuate the mixture at 29 in. Hg for 3-4 minutes for void-free castings.
5. Pour into unit or mold.
CURE SCHEDULES:
Overnight at room temperature (24 hours at 25°C.) or may be heat accelerated as follows:
1 hour at 60°C OR
15 minutes at 95°C OR
8 minutes at 120°C
SPECIAL NOTES:
Certain materials may inhibit the cure of RTVS 27 LV when placed in contact with the mixed, uncured rubber. Materials such as amines and amine cured epoxies, sulfur containing materials and condensation (tin cured) silicones, are some which may cause inhibition. Even surfaces which have been in contact with such materials may cause it. If in doubt, a patch test should be done.
IMPORTANT:
The following supersedes any provision in your company's forms, letters and papers. AMERICAN SAFETY TECHNOLOGIES, INC. makes NO WARRANTY, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTIES of MERCHANTABILITY OR of FITNESS FOR A PARTICULAR PURPOSE FOR THIS PRODUCT. No statements or recommendations contained in the product literature are to be construed as inducements to infringe any relevant patent, now or thereafter in existence. UNDER NO CIRCUMSTANCES SHALL AMERICAN SAFETY TECHNOLOGIES, INC. BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR OTHER DAMAGES FROM ALLEGED NEGLIGENCE, BREACH of WARRANTY, STRICT LIABILITY OR ANY OTHER THEORY, ARISING OUT of THE USE OR HANDLING of THIS PRODUCT. The sole liability of AMERICAN SAFETY TECHNOLOGIES, INC. for any claims arising out of the manufacture, use or sale of its products shall be to refund the buyer's purchase price, provided such products have been demonstrated in AMERICAN SAFETY TECHNOLOGIES, INC. sole opinion, to justify such refund.
HEALTH CAUTION:
RTV silicone rubber base compounds and the curing agents for addition cure products are non-hazardous and practically non-toxic. Curing agents for condensation cure products contain tin soaps which can irritate eyes and skin of some individuals. Avoid contact with skin; if contact occurs, wash affected areas at once with soap and water. Avoid contact with eyes. In case of contact with eyes, flush with water for 15 minutes; call a physician.
PLEASE REFER TO MATERIAL SAFETY DATA SHEET FOR FURTHER FIRST AID INFORMATION.
FOR CHEMICAL EMERGENCY
CALL CHEMTREC (DAY OR NIGHT) 800 424-9300.
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