Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Advantages
904-64 features easy air release and minimal shrinkage. It has excellent mechanical and thermal properties. 904-64 offers a wide range of service temperatures and excellent chemical resistance. It 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. The 904-64 mixed system features a moderate set up time at temperatures above 20°C. Cure times are directly related to the mass of the material.
Applications & Uses
- Markets
- Application Area
- Cure Method
- Applications
904-64 is widely used in the manufacture of electrical and electronic components as a cushion coating as well as an encapsulant or potting compound.
Properties
- Component A
- Component B
- Typical Properties
- Typical Cured Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.65 (Resin) | — | — |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.65 (Curative) | — | — |
| Mix Ratio | 100 | — | — |
| Value | Units | Test Method / Conditions | |
| Mixed Viscosity (at 25°C) | 10000 | cP | — |
| Pot Life | 120 | Minutes | — |
| Value | Units | Test Method / Conditions | |
| Hardness (measured at 25°C) | min. 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
- Instruction
Combine the Curative and pre-polymer in the ratio listed above. Mix by hand or mechanical mixer until material is uniform in appearance. Place mixed material in vacuum chamber and degas to a minimum of 29 in Hg for five minutes. Remove and use degassed material within ten minutes.
- Shelf Life
One year @ 25°C (both A+B). Hand agitation of the Prepolymer components is recommended after longstanding to insure best results.
- Cure Schedule
Overnight or 16 hours @ 25°C (77°F) will yield 80% of the system’s 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.