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Product Details:
Payment & Shipping Terms:
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| Main Raw Material: | Ephchlorohydrin,phenol-formaldehyde | Application: | Heat Resistance Adhesives, Coatings, Laminates, Composites,PCB Inks, Potting And Encapsulation |
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| Color: | Colorless Or Light Yellow | Appearance: | Semi-solid |
| High Light: | Ephchlorohydrin Novolac Epoxy Resin,Novolac Epoxy Resin 638,638 High temperature Epoxy Resin |
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Novolac Epoxy Resin 638 for heat resistance coatings
Novolac Epoxy Resin (638)
General description
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.
Characteristic:
• High viscosity
• High temperature resistance
• Chemical resistance
• Good adhesion strength
• High mechanical strength
Typical applications:
•Heat resistant adhesives
•Hear resistant coatings
•Laminates
•Composite
•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 (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.
Contact Person: cherry
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