Technical Product Bulletin
AA-BOND 202 SILICONE RUBBER DISPERSION
PRODUCT DESCRIPTION
AA-BOND 202 Silicone Rubber Dispersion, when cured, is a high-strength silicone rubber that may be used over a temperature range of -70°C to 250°C (-94°F to 482°F). It contains a heat curing catalyst and is ready to use.
It consists of 29% solids dispersed in xylene. AA-BOND 202 features application versatility with good high temperature stability, long pot life, fast-curing properties, and is pigmentable for color customization.
AA-BOND 202 provides excellent adhesion to vulcanized or cured silicone rubber, metals, and other substrates without the need for a primer, making it ideal for industrial bonding and coating applications.
This versatile dispersion serves as an adhesive, coating, and splicing agent with superior performance in demanding high-temperature environments.
PRODUCT PROPERTIES
| Type, ASTM D 1418 | VMQ |
| Physical Form | Solvent Dispersion |
| Color | Gray |
| Benefits |
|
| Operating Temperature | -70°C (-94°F) to +250°C (482°F) |
| Brittle Point, ASTM D 2137-A | -73°C (-100°F) |
| Substrates | Vulcanized and non-vulcanized silicone rubber, metals, glass cloth, fabrics |
| Typical Applications | Adhesive, coating, splicing agent, glass cloth sizing, rubber bonding |
UNCURED PROPERTIES
| Percent Solids, % | 28-31 |
| Vehicle | Xylene |
| Viscosity, Brookfield LVT, cps | 4,000 - 25,000 cps (Spindle #3 at 6 RPM) |
| Specific Gravity at 25°C (77°F) | 0.95 ± 0.03 |
| Pot Life | Few days to several months (depends on solvent evaporation) |
CURE SCHEDULE
| 60 seconds | 204°C (400°F) |
| 5 minutes | 149°C (300°F) |
| Optimal cure: 1 hour | 160°C (320°F) |
| Optimal cure: 20 minutes | 177°C (350°F) |
CURED PROPERTIES
Cured at 177°C for 1 hour
| Hardness, Shore A-2 (ASTM D 2240) | 85 |
| Tensile Strength, psi (ASTM D 412) | 830 |
| Elongation, % (ASTM D 412) | 125 |
| Tear Strength, Die B, ppi (ASTM D 624) | 70 |
| Tear Strength, Die C, ppi (ASTM D 624) | 145 |
APPLICATION METHODS
Versatile Application Options
- Dip Coating: Withdraw items slowly at constant rate for smooth, even coating
- Brush Coating: Apply liberally for maximum flow-out
- Spray Coating: Thin to appropriate viscosity for spray equipment
- Bonding: Apply 5 mil dry thickness for optimal adhesion
SPECIALIZED APPLICATIONS
Key Application Areas
- Silicone Bonding: Bonds vulcanized and non-vulcanized rubber without primer
- Glass Cloth Sizing: Excellent for calendering and bonding applications
- Splicing Agent: Joins both cured and uncured silicone rubber
- High-Temperature Coating: Stable up to 250°C (482°F)
GENERAL INFORMATION
For safe handling information on this product, consult the Material Safety Data Sheet, (MSDS).
Caution: AA-BOND 202 contains xylene and should be used only with adequate ventilation. Avoid prolonged breathing of vapor and skin contact. Vapors form explosive mixtures with air.
HOW TO USE
- Surface Preparation: Ensure all surfaces are clean and properly prepared.
- Thinning (if needed): Can be thinned with xylene or other hydrocarbon solvents. Use naphtha for slower evaporation rate.
- Application: Apply using dip, brush, or spray methods as appropriate for your application.
- Solvent Removal: Allow adequate drying time - 20-180 minutes at room temperature, or 15-60 minutes at 43-60°C (110-140°F).
- Curing: Heat cure according to schedule. For bonding applications, apply contact pressure during cure cycle.
- Final Cure: For optimal properties, use final cure of 1 hour at 160°C (320°F).
AVAILABILITY
AA-BOND 202 is supplied in various container sizes to meet your application requirements. Store in cool, dry place at or below 25°C (77°F) for optimal shelf life.
Data Sheets: TDS | MSDS available upon request.
