Novolac Epoxy Resin Hwr 638
Heterochain Polymer
Yellowish
Coating, Adhesive, Sealant, Epoxy Flooring
Clear Liquid
174-180
H-K
Novolac Epoxy Resin
Honrel
Drum
220KG/Drum
China
3506912000
Product Description
General description
HWR-638 is a semi-solid reaction product of epichlorohydrn 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.Characteristic: Typical applications:
• High viscosity • Heat resistant adhesives
• High temperature resistance • Heat resistant Coatings
• Chemical resistance • Laminates
• Good adhesion strength • Composite
• High mechanical strength • PCB inks
• Potting and Encapsulation
Typical properties:
| Property | Value |
| 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 |
Storage:
Novolac Epoxy Resin HWR-638 is supplied in bulk or in 220KG tight-head drums. The resin should be stored in dry place in its original closed packaging.
Shelf life is 12 months.
