Epoxy Novolac Resins/Phenolic Novolac Epoxy Resin HWR-638 Provides Tightly Cross-Linked Cured Systems
General:
Epoxy Novolac Resins HWR-638 is is a Phenol Novolac epoxy resin. HWR-638 is a multifunctional resin that provides good adhesive strength, excellent heat and chemical resistance properties to formulations. Higher viscosity version of HWR-638. Suitable for use in solvent-free applications. It is recommended for use in heat resistant adhesives, composite applications, heat resistant coatings, structural laminates, civil engineering and construction applications, and for castings and moldings. For the composites market, HWR-638 is used to manufacture sporting goods, yachts, automobile parts, etc. It is often cured with various hardeners including: polyamide resins, aromatic polyamines, aliphatic polyamines, and anhydrides.
Sale Specification & 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 |
Application:
1. Laminates.
2. Civil engineering.
3. Filament winding.
4. Composite
Storage properties:
At least 12 months in sealed containers at ambient temperature. The resin should be stored in a dry place in its original closed packaging
Handling precautions:
Product may cause skin and eye irritation. In case of skin contact, wash immediately with soap and water. For eyes, flush with plenty of water for 15 minutes and seek medical attention immediately.
Packing:
220 kg iron drum.
Product Tags:
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Phenolic Novolac Epoxy Resin HWR-638 For Tightly Cross-Linked Cured Systems Images
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