Yellowish transparent semi-solid Novolac Epoxy Resin HWR-638 with high mechanical strength
| Product Name: | Epoxy Resin 638 |
| Quality Standard: | Tech grade |
| Description: | Epoxy resin 638 is a semi-solid reaction product of epichlorohydrin and phenol-formaldehyde novolac. It has advantageous characteristics of good adhesion strength, excellent heat and chemical resistance because of its multi-functional groups in one molecule fully cross-linked. Therefore, it has excellent physical properties in addition to the basic reactivity of general Epoxy Resin
|
The physical and chemical properties
| Test Item | Specification |
| Appearance | Yellowish, Transparent, Semi-solid
|
Epoxy equivalent (g/mol)
| 174-180
|
Color (Gardner)
| ≤1
|
Chloride Content (ppm)
| ≤5
|
Hydrolyzable Content (ppm)
| ≤300
|
Volatile matter (ppm)
| ≤500
|
| Viscosity(cps,25°C) | H-K
|
Characteristic:
• High viscosity
• High temperature resistance
• Chemical resistance
• Good adhesion strength
• High mechanical strength
Typical applications:
• Heat resistant adhesives
• Heat resistant Coatings
• Laminates
• Composite
• PCB inks
• Potting and Encapsulation
Storage and packaging
Stored in a cool and dry place with ventilation and can be sealed for 12 months.
Package:220kg in iron drum.
