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Epoxy phenol novolac resins

Epoxy phenol novolac (EPN) resins contain more than two epoxy groups per molecule and are therefore described as multifunctional epoxy resins. In other words these are polyepoxides obtained by reacting a phenolic novolac resin with epichlorohydrin. When cured, these provide a high cross-link density due to the increased epoxy functionality.

EPN resins are highly recommended in formulations for high-performance applications requiring excellent chemical resistance, solvent resistance and exceptional high temperature resistance than the standard bisphenol A epoxy resins. These EPN resins can also be used in blends to upgrade the performance offered by bisphenol A and F epoxy resins.

The Epotec range offers low viscosity and high functionality and are premier products for high corrosion-resistant coatings and linings. These also find use in high temperature-resistant adhesives, corrosion resistant marine coatings, maintenance coatings, industrial coatings, tank linings, pipe coatings, primers in automotive, coil and appliances and manufacturing of epoxy vinyl esters.

Customised solvent-cut versions of EPN resins with xylene, MIBK, MEK, etc can also be formulated upon request.

EPN resins are manufactured by Aditya Birla Chemicals (Thailand) and are available in the following grades:

YDPN 631 | YDPN 638 | YDPN 638LV | YDPN 661 | YDPN 638X80 | YDPN 638EK85

Product specifications:
Grade YDPN 631
EEW1 172 - 180
Viscosity2 1,100 - 1,700
Colour3 3
FN4 2.8
Features Improves chemical resistance, good retention of property at elevated temperature, widely used for coating applications
 
Grade YDPN 638
EEW1 175 - 182
Viscosity2 30,000 - 50,000
Colour3 1
FN4 3.6
Features High mechanical, chemical and elevated temperature resistance properties
Grade YDPN 638LV
EEW1 175 - 182
Viscosity2 20,000 - 30,000
Colour3 1
FN4 3.6
Features High mechanical, chemical and elevated temperature resistance properties
 
Grade YDPN 661
EEW1 170 - 178
Viscosity2 20,000 - 40,0005
Colour3 3
FN4 2.5
Features Low viscosity. Good chemical and mechanical properties
Grade YDPN 638X80
EEW1 175 - 182*
Viscosity2 1,200 - 2,000
Colour3 2
FN4 -
Features Solution of EPN in xylene
 
Grade YDPN 638EK85
EEW1 175 - 182*
Viscosity2 600 - 1,600
Colour3 2
FN4 -
Features Solution of EPN in MEK solvent. Easy-to-use and apply. Fast drying characteristics
1 Epoxy equivalent weight (grams/ equivalent) on solid resins
2 Brookfield viscosity @ 52°C (cPs)
3 Gardner colour scale (max)
4 Functionality
5 Brookfield viscosity @ 25°C (cPs)
* On solids

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