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EPO-TEK OG198-55

Technical Data Sheet

For Reference Only
Shadow Curable UV Epoxy

Date: April 2022
No. of Components:
Specific Gravity:
Pot Life:
Shelf Life- Bulk:
Shelf Life- Syringe:

Recommended Cure

Rev: X
SingleIron-Doped Mercury Flood Lamp

> 30 sec.

Alternative Cures*
Iron-Doped Mercury Spot Lamp
365nm LED Flood Lamp
Pulsed Mercury Lamp

> 30 sec.
> 30 sec.
> 30 sec.

2100 mW/cm @ 240-365 nm

1.15

N/A
Six months refrigerated
Six months refrigerated

NOTES:UV Cure is complete after 24 hours
from UV Exposure● Container(s) should be kept closed when not in use.
● Filled systems should be stirred thoroughly before mixing and prior to use.

* Contact Technical Services for applicationspecific variations● Performance properties (rheology, conductivity & others) may vary from those stated below when syringe packaging and/or
post-processing is required.
● Thermal post-cure beneficial - contact techserv@epotek.com for recommendations.
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Product Description: EPO-TEK OG198-55 is a high viscosity, single component, electrically and thermallyinsulating, translucent UV cure epoxy. It is the more thixotropic version of EPO-TEK® OG198-54.
Typical Properties: Cure condition: varies as required *denotes test on lot acceptance basis Data below is not guaranteed.
To be used as a guide only, not as a specification. Different batches, conditions & applications yield differing results.

PHYSICAL PROPERTIES:Translucent* Color (before cure):
Smooth thixotropic paste* Consistency:
1,200-2,000 cPs* Viscosity (23°C): @ 100 rpm
6.0
Thixotropic Index:≥120°C (Dynamic Cure:20-200°C/ISO 25 Min; Ramp -10-200°C @ 20°C/Min)* Glass Transition Temp:
Coefficient of Thermal Expansion (CTE):
72 x 10-6 in/in°C
Below Tg:
120 x 10-6 in/in°C
Above Tg:
85
Shore D Hardness:
Die Shear @ 23°C:
UV Cure:≥ 20 Kg 7,112
psi
UV Cure + 23°C/24 Hours:
27.7 Kg 9,850.1 psi
UV Cure + 80°C/1 Hour:27.2 Kg 9,672.3 psi
354 °C
Degradation Temp:
0.23 %
Weight Loss:@ 200°C
0.73 %@ 250°C
2.13 %@ 300°C< 300 °C (Intermittent)
Suggested Operating Temperature:
489,872 psi
Storage Modulus:≤ 20 microns* Particle Size:
OPTICAL PROPERTIES @ 23°C:≥ 97% @ 560-1,680 nm
Spectral Transmission:
1.5023 @ 589 nm
Refractive Index (uncured):
1.5196 @ 589 nm
Refractive Index (cured):Epoxies and Adhesives for Demanding Applications™
This information is based on data and tests believed to be accurate. Epoxy Technology, Inc. makes no warranties (expressed or implied) as to its
accuracy and assumes no liability in connection with any use of this product.

EPOXY TECHNOLOGY, INC.
14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782

www.epotek.com
A Meridian Adhesives Group CompanyPage 1 of 2®

EPO-TEK OG198-55

Technical Data Sheet

For Reference OnlyShadow Curable UV Epoxy®

EPO-TEK OG198-55 Advantages & Suggested Application Notes:● UV shadow cure allows for enhanced performance after a thermal post cure and significant curepropagation into shadow area.
● High Tg.
● Strong transmission above 560 nm.
● Suggested Applications:◊ Active alignment of optics◊ Bonding fibers to V-grooves◊ Fiber pigtails◊ Medical devices◊ Alignment in optoelectronic hybrids◊ Semiconductor devices◊ General bonding including structural adhesive in commercial LED lightingEpoxies and Adhesives for Demanding Applications™
This information is based on data and tests believed to be accurate. Epoxy Technology, Inc. makes no warranties (expressed or implied) as to its
accuracy and assumes no liability in connection with any use of this product.

EPOXY TECHNOLOGY, INC.
14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782
www.epotek.com
A Meridian Adhesives Group Company

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