Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Kukdo Chemical SM-690 Epoxy Resin

SM-690 is a premium modified epoxy resin in Kukdo’s SM series, designed for precision casting and high-clarity encapsulation. It features excellent optical clarity and low-shrinkage curing, adapting to fine-structure molding needs.

Features Of Kukdo Chemical SM-690 Epoxy Resin

  • High-clarity formula - High optical clarity after curing, no obvious yellowing

  • All-liquid active system - 100% active ingredients, ready for use without dilution

  • Low-shrinkage curing - Extremely low curing shrinkage, high dimensional accuracy

  • Excellent weather resistance - UV aging resistance, stable for outdoor use

  • Convenient processing characteristics - Low viscosity for easy pouring, minimal bubble entrapment, high molding efficiency

Typical Applications Of Kukdo Chemical SM-690 Epoxy Resin

  • Precision casting products - Manufacturing of transparent optical components and fine mold prototypes

  • Electronic component encapsulation - Transparent packaging protection for visually identifiable electronic components

  • Decorative material molding - Preparation of high-end transparent decorative parts and artistic casting products

  • Sensor encapsulation - Sealing protection for optical sensors and transparent detection elements

  • Automotive optical components - Casting molding of automotive transparent lenses and indicator covers

Specifications Of Kukdo Chemical SM-690 Epoxy Resin

AppearanceColorless Transparent Liquid
Epoxy Equivalent (g/eq)215-235
Viscosity (25℃, cps)2800-4800
Color (G)≤3
Hydrolyzable Chlorine (ppm)≤250
Solid Content (%)100
Density (20℃, g/cm³)1.13-1.15
Glass Transition Temperature (Tg, ℃)105-115
Curing Shrinkage (%)≤0.2
Light Transmittance (400-760nm)≥90%
UV Aging Resistance (1000h)No obvious yellowing
Hardness (Shore D)≥80


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