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Description for Dow Silastic 9280/75E
Good clarity; easily pigmented; formulated to meet BgVV, XV and FDA regulations.Brand Silastic Application Type Mold-Making 1 Part or 2 Part 2-Part Material Form Liquid Manufacturer Dow Chemistry Silicone rubber Cure Method Part A/Part B Cure Temperature (°C) 120, 200, 200 Cure Time (min) 10, 240, 0.13 to 0.23 Viscosity (cPs) 520 (Pa.s) Volume Resistivity (O) 4.8e15 (ohms/cm) Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): FDA 21 CFR 177.2600 -
Technical Data for Dow Silastic 9280/75E
Overview
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Application Type
- Casting / Moldmaking - Mold-Making
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1 Part or 2 Part
- 2-Part
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Material Form
- Liquid
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Chemistry
- Silicone - Silicone rubber
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Application Method
- Dispenser - Meter mix equipment
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Cure Method
- 2-Part Cure - Part A/Part B
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Key Specifications
- FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency) : 177.2600 - FDA 21 CFR 177.2600
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Brand
- Silastic
Specifications
Cure Specs
Cure Temperature (°C) 120, 200, 200 Test Method Cure Time (min) 10, 240, 0.13 to 0.23 Test Method Viscosity (cPs) 520 (Pa.s) Test Method Work / Pot Time (min) 4,320 Test Method Mix Ratio 1:1 (by volume) Bond Strength
Tear Strength (piw) 20 (kN/m), 10 (kN/m) Test Method Tensile Strength (psi) 9.0 (Mpa), 9.0 (Mpa) Test Method Conductivity
Volume Resistivity (O) 4.8e15 (ohms/cm) Test Method Hardness
Shore A Hardness 74, 77 Test Method Elongation (%) 400, 380 Test Method Other Properties
Specific Gravity 1.160 Test Method Flash Point (°F) 212.0 % Solids (%) 100 Business Information
Shelf Life Details When stored at or below 32°C (90°F) in original unopened containers, this product has a usable life of 15 months from the date of production. Shelf Life Type from the date of production Shelf Life (mon) 15 -
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Best Practices for Dow Silastic 9280/75E
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Mixing
The A & B components are supplied strained and de-aired to be used as lot matched kits.
Mix Parts A & B in a 1:1 ratio. Meter Mix equipment which pumps, meters and mixes the two components without the incorporation of air is strongly recommended for production.
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Deairing/Degassing
If air bubbles are entrapped during mixing the moisture must be thoroughly degassed under vacuum.
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Curing
SILASTIC 9280/75E cures rapidly at elevated temperatures. A 2mm cross-section requires 8-14 seconds at 200°C (392°F). The cure time depends on the thickness and the cure temperature used. Cure can be inhibited by contact with certain materials such as amines, sulphur and tin complexes.
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Clean-Up
The uncured silicone can readily be removed by most hydrocarbon solvents. Polar solvents, such as ketones and alcohols, are not suitable.
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Comparable Materials for Dow Silastic 9280/75E
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
---|---|
120°C | Press cure |
200°C | Post cure |
200°C |
Cure Time Test Methods
Cure Time | Test Method |
---|---|
10 min | Press cure |
240 min | Post cure |
0.13 to 0.23 min |
Viscosity Test Methods
Viscosity | Test Method |
---|---|
520 (Pa.s) | Y=10.0s-1, Viscosity measured on the Carrimed CSL Viscometer. |
Work / Pot Time Test Methods
Work / Pot Time | Temperature |
---|---|
4,320 min | 25°C |
Tensile Strength Test Methods
Tensile Strength | Test Method |
---|---|
9.0 (Mpa) | ASTM DIN 53504 |
9.0 (Mpa) | ASTM DIN 53504 |
Tear Strength Test Methods
Tear Strength | Test Method |
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20 (kN/m) | ASTM D624B |
10 (kN/m) |
Volume Resistivity Test Methods
Volume Resistivity | Test Method |
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4.8e15 (ohms/cm) | ASTM D257 |
Elongation Test Methods
Elongation | Test Method |
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400 % | DIN 53504 |
380 % | DIN 53504 |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method |
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74 | Hardness/Durometer Test Method |
77 | DIN 53505 |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.160 | DIN 53479 |