Name: DCPD-Modified Epoxy Resin (Cycloaliphatic Diluent Resin)
Brand: Coatingsink
SKU: dcpd-modified-epoxy-resin
Availability: InStock

Question 1

Why use a DCPD-modified epoxy resin instead of a standard monofunctional reactive diluent (BGE, CNGE)?

Accepted Answer

Dicyclopentadiene (DCPD)-modified epoxy resins have bifunctionality (~2.0) so they participate fully in the crosslink network rather than acting as network terminators like monofunctional diluents. This preserves glass transition temperature and mechanical strength while reducing viscosity. DCPD modification also imparts lower vapor pressure than small-molecule reactive diluents, reducing workplace exposure and improving REACH compliance.

Question 2

At what addition level should DCPD-modified epoxy be blended with standard E-51?

Accepted Answer

Typical addition levels are 10–30% by weight of the total resin blend. At 20% addition the system viscosity is reduced by approximately 40–50% while retaining >90% of the neat E-51 Tg and flexural strength. Above 40% blending, a slight decrease in Tg and impact resistance may be observed. Adjust the hardener phr accordingly, based on the weighted average EEW of the blend.

Color (APHA)	≤50
Functionality	~2.0
Vapor Pressure	lower than standard diluents
Viscosity (25°C)	500–1500 mPa·s
Epoxide Equivalent Weight	170–185 g/eq

DCPD-Modified Epoxy Resin (Cycloaliphatic Diluent Resin)

Specifications

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