0
NPPN-638S has two advantageous properties，heat resistively of phenolic backbone and reactivity of an epoxy.Comparing with BPA-based epoxides which have two epoxides per molecule，NPPN-638S has an average of 3.6 epoxy groups per molecule.
NPPN-638S provides tightly cross-linked cured systems having better
elevated temperature performance，chemical resistance and adhesion than the BPA-based resins.
Product Description
NPPN-638S is a semi-solid phenolic novolac epoxy resin developed for resin systems that require a highly cross-linked cured network. It combines the heat-resistant characteristics of a phenolic backbone with the reactivity of an epoxy resin.
Compared with conventional bisphenol A-based epoxy resins, which normally contain two epoxy groups per molecule, NPPN-638S contains an average of approximately 3.6 epoxy groups per molecule. This higher epoxy functionality allows properly formulated and cured systems to achieve improved elevated-temperature performance, chemical resistance and adhesion.
| Quality | Unit | Range |
| Physical State | - | Semi Solid |
| Epoxy Equivalent Weight | g/eq | 170~190 |
| Color | Gardner | 3max |
| Solution viscosity | 25℃ | H~J |
Chemical Composition
NPPN-638S is classified as a phenolic novolac epoxy resin.
The phenolic novolac structure provides multiple reactive epoxy groups within each molecule. When combined with a compatible curing system, these functional groups can produce a dense three-dimensional network.
The final processing behavior and cured properties will depend on the selected curing agent, formulation, curing schedule, fillers, reinforcement and production conditions.
Application
● Laminates
●
Civil engineering
●
Filament winding
●
Composite
We cooperate with multiple well-known domestic suppliers
Our products have passed various industry certifications
