EPO-TEK OG142-112-LH

Single-component low-halogen UV-cure optical epoxy, 800–2,000 cPs, Tg ≥129°C, die shear 22 Kg (UV-cure only), ≥96% transmission @ 460–1,620 nm, RI 1.5629 for fiber optic and optoelectronic packaging.

Product code:

OG142-112-LH

Package size:

3ml/ 5ml/ 10ml syringe

Shelf Life:

One year refrigerated

RoHS Compliant

EPO-TEK OG142-112-LH is a single-component, low-halogen, UV-curable optical epoxy for adhesive sealing and encapsulation of fiber optic and optoelectronic packaging. Manufactured by Epoxy Technology, Inc., it is the low-halogen version of OG142-112, offering the same high optical performance (≥96% transmission at 460–1,620 nm, RI 1.5629 cured) with Tg ≥129°C — one of the highest in the UV-cure optical epoxy range. Immediate cure die shear of 22 Kg from UV exposure alone.

Features & Benefits

Low halogen formulation — suitable for halogen-sensitive fiber optic and telecom environments
Highest Tg in class: ≥129°C for demanding thermal and solder reflow environments
Die shear 22 Kg from UV-cure alone — immediate high fixture strength after UV exposure
Excellent transmission ≥96% @ 460–1,620 nm covering visible to near-IR range
Precise refractive index: 1.5629 @ 587 nm and 1.5446 @ 1,550 nm for optical coupling design
Long shelf life (1 year refrigerated) — reliable storage for production planning

Typical Applications

Fiber optic connector bonding and sealing requiring low halogen and high Tg
UV-cure adhesive for optoelectronic packaging in telecom modules
Sealing and encapsulation of fiber arrays in photonic integrated circuits
Fiber optic assemblies operating at 1,550 nm requiring precise refractive index matching

Property	Value	Test Method / Condition
Color (before cure)	Clear/Colorless	Visual
Consistency	Pourable Liquid	—
Viscosity (23°C @ 100 rpm)	800–2,000 cPs	—
No. of Components	Single	—
Glass Transition Temp	≥129°C	Dynamic Cure: 20-200°C @ 20°C/Min
CTE Below Tg	55 × 10⁻⁶ in/in°C	—
Shore D Hardness	83	—
Die Shear — UV Cure only	22 Kg (7,832 psi)	—
Die Shear — UV + 23°C/24 hrs	21.2 Kg (7,539 psi)	—
Die Shear — UV + 120°C/1 hr	23.9 Kg (8,499 psi)	—
Spectral Transmission	≥96% @ 460–1,620 nm	—
Refractive Index (uncured)	1.5374 @ 589 nm	—
Refractive Index (cured)	1.5629 @ 587 nm; 1.5523 @ 830 nm; 1.5446 @ 1,550 nm	—
Degradation Temp	406°C	—
Low Halogen	Yes — low halogen version of OG142-112	—
Recommended Cure	Iron-doped Hg flood lamp >90 sec, 100 mW/cm² @ 240–365 nm	Alt: 365 nm LED >4 min

Property

Value

Test Method / Condition

Color (before cure)

Clear/Colorless

Visual

Consistency

Pourable Liquid

—

Viscosity (23°C @ 100 rpm)

800–2,000 cPs

—

No. of Components

Single

—

Glass Transition Temp

≥129°C

Dynamic Cure: 20-200°C @ 20°C/Min

CTE Below Tg

55 × 10⁻⁶ in/in°C

—

Shore D Hardness

—

Die Shear — UV Cure only

22 Kg (7,832 psi)

—

Die Shear — UV + 23°C/24 hrs

21.2 Kg (7,539 psi)

—

Die Shear — UV + 120°C/1 hr

23.9 Kg (8,499 psi)

—

Spectral Transmission

≥96% @ 460–1,620 nm

—

Refractive Index (uncured)

1.5374 @ 589 nm

—

Refractive Index (cured)

1.5629 @ 587 nm; 1.5523 @ 830 nm; 1.5446 @ 1,550 nm

—

Degradation Temp

406°C

—

Low Halogen

Yes — low halogen version of OG142-112

—

Recommended Cure

Iron-doped Hg flood lamp >90 sec, 100 mW/cm² @ 240–365 nm

Alt: 365 nm LED >4 min

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