Name: Rubber-Toughened Epoxy Adhesive Resin RTE-100
Brand: Coatingsink
SKU: rubber-toughened-epoxy-adhesive
Availability: InStock

Question 1

What curing agents are compatible with RTE-100?

Accepted Answer

RTE-100 is compatible with amine, polyamide, and anhydride hardeners. For structural metal bonding, aromatic or cycloaliphatic amines (MXDA, IPDA) at 20–25 phr give the best balance of Tg and peel strength. Anhydride systems are preferred where electrical insulation properties must be maintained.

Question 2

How does CTBN toughening affect the glass transition temperature of the cured system?

Accepted Answer

Approximately 15% CTBN loading reduces Tg by 15–25°C versus unmodified bisphenol-A epoxy. For applications requiring Tg >100°C, reduce CTBN content or introduce a cycloaliphatic co-resin. The trade-off delivers measurable gains in fracture toughness (KIC) and T-peel strength that justify the Tg penalty in most structural bonding scenarios.

Question 3

Is RTE-100 suitable for CFRP-to-aluminum joints in automotive structural applications?

Accepted Answer

Yes. RTE-100 is designed for dissimilar substrate bonding where differential CTE between CFRP (~2 ppm/°C) and aluminum (~23 ppm/°C) generates peel stress during thermal cycling. The dispersed rubber phase absorbs strain energy, maintaining joint integrity through −40°C to +100°C thermal shock cycles.

Density (25°C)	1.18 g/ml
Viscosity (25°C)	8000–12000 mPa·s
CTBN Rubber Content	~15%
Epoxy Equivalent Weight	190–210 g/eq
T-Peel Strength (Al/Al)	≥6 N/mm

Rubber-Toughened Epoxy Adhesive Resin RTE-100

Specifications

FAQ

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