Knowde Enhanced TDS
Identification & Functionality
- Technologies
Features & Benefits
- Ready-to-Use Product Features
- Advantages
904-64-4 features easy air release properties, minimal shrinkage, great mechanical and thermal properties. 904-64- 4 offers a wide range of service temperatures, features excellent chemical resistance and has a rating of UL 94V-0 (File # E-48923). A fully cured end product will not undergo reversion until normal operating conditions are exceeded. 904-64-4 features a moderate set up time at temperatures above 20°C. All gel and cure times are directly related to the mass of the material
Applications & Uses
- Applications
- Application Area
- Cure Method
- Applications
904-64-4 is widely used in the manufacture of electrical and electronic components as a cushion coating, an encapsulant or potting compound.
Properties
- Component A
- Component B
- Typical Cured Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 2.13 (Resin) | — | — |
| Viscosity (at 25°C) | 231600 (Resin) | cP | — |
| Mix Ratio | 100 (Resin) | — | — |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 2.13 (Curative) | — | — |
| Viscosity (at 25°C) | 20,360 (Curative) | cP | — |
| Mix Ratio | 100 (Curative) | — | — |
| Value | Units | Test Method / Conditions | |
| Hardness (measured at 25°C) | 65 | Shore A | — |
| Tensile Strength | min. 575 | psi | — |
| Tear Strength | 12 | ppi | — |
| Elongation | min. 75 | % | — |
| CTE x 10 | 1.7 x 103 | — | — |
| Dielectric Strength | 650 | VTM | — |
| Dielectric Constant (at 1 MHz) | 3.9 | — | — |
| Dissipation Factor (at 1KHz) | 0.0009 | — | — |
| Volume Resistivity | 104 | Ohm-cm | — |
| Thermal Conductivity | 11.2 | BTU-in/ (f) (hr) (°F) | — |
| Service Temperature | -55 to +260 | °C | — |
Regulatory & Compliance
- Certifications & Compliance
Storage & Handling
- Shelf Life
- 6 Months at 25°C, Six Months at 25°C
- Shelf Life
Six Months @ 25°C (both A+B). Hand agitation of the Prepolymer components recommended after longstanding to insure best results
- Instruction
Combine the Curative and pre-polymer in the ratio listed above. Mix by hand or mechanical mixer until material is uniform in appearance. Put mixed material in vacuum chamber and degas to a minimum of 29 inches for five minutes. Remove and use material within ten minutes.
- Cure Schedule
Overnight or 16 hours @ 25°C (77°F) will yield 80% of the systems full potential. An additional 80 hours @ 25°C (77°F) will yield the systems full potential.
% Full Cured 80% 100% 100% Cure Temp 25°C 25°C 65°C Cure Time (Hours) 16 96 1 Pot Life (50 grams) @ 25°C = 120 minutes
- Storage and Handling
Normal storage and handling is at room temperature. Use standard mixing and housekeeping procedures to minimize the risk of spills and contact with individuals and the surrounding materials. Required storage temperature is 20 to 30°C. Upon opening and using the individual components wipe the rim of the containers. Reseal containers immediately after using. This is a recommended procedure after each use.