Liquid Epoxy Resin | Sumitomo Bakelite Co., Ltd.

Products

SUMIMAC™ ECR & ECH are epoxy resin-based liquid resin and has excellent workability and safety.
It is widely used as casting resin for ignition coil insulation or sealing resin for relay or sensor insulation.

Plant

Shizuoka Plant
Sumitomo Bakelite (Nantong) Co., Ltd.

Laboratories

High Performance Plastic Technology Development Laboratory

Features

Insulated filling material for ignition coils

Separated type liquid resin: Epoxy / hardener
Low viscosity and good deforming performance for coil impregnation and excellent withstanding voltage
Easy operation with good mixing performance
Good storage stability

Insulated encapsulation material for relays
(automotive, communication and industrial equipment)

Premix type liquid resin: epoxy / hardener
Good heat resistance for reflow soldering
Good adhesion with phosphorus bronze terminals
Low cure temperature grade (100°C) is available.

Separated type liquid resin: epoxy / hardener
Excellent electrical insulation properties
Good storage stability

Applications

Electrical and Electronic Equipment

Electronic Components

motors — Application example: ignition coil impregnation

Specifications

SUMIMAC™ ECR series products line-up (Premix-type liquid resin: Epoxy/hardener)

Feature	ECR-9250K	ECR-9240K
Features	High Heat Resistance Strong Adhesion	High Strength Strong Adhesion
Current Application	Relay	Sensor
Color	Black	Black
Viscosity (Pa·s @60°C)	0.5	2
Curing Condition	60min @100℃ or 30min @120℃	60min @120℃
Barcol Hardness	88	89
Glass Transition Temp (℃)	150	130
Coefficient of Linear Expansion (1/℃) ≦Tg	4×10^-5	4×10^-5
Bending Strength (MPa)	83	95
Bending Modulus (GPa)	5.0	3.5
Volume Resistivity (Ω·cm)	1×10¹⁶	1×10¹⁵
Weight Gain after Boiling Water 2hr (%)	0.4	0.5
Shear Bond Strength (MPa) Aluminum	–	10
Shear Bond Strength (MPa) Phosphorus Bronze	9	–
Shear Bond Strength (MPa) LCP	10	–

The data given above are not guaranteed values.

SUMIMAC™ ECR, ECH series products line-up (Separated-type liquid resin: epoxy/hardener)

	ECR-2222K / ECH-222G
Feature	Low Viscosity
Current Application	Casting of Resin to Ignition Coil
Mixing Ratio	100:100
Color of Mixture	Black
Viscosity of Mixture(Pa･s 60℃)	0.5
Curing Condition	2hrs @100℃ ＋2hrs @140℃
Glass Transition Temp (℃)	125
Coefficient of Linear Expansion (1/℃) ≦Tg	4×10^-5
Bending Strength(MPa)	130
Bending Modulus(GPa)	9
Thermal Conductivity(W/m･K LFA)	0.7