LENS BOND UV-69

The optical adhesive LENS BOND Type UV-69 does not require the addition of a catalyst. The hardening process is triggered and carried out by exposure to ultraviolet light, for which a simple, ordinary sunlamp or a similar light source is sufficient. Heat alone does not harden. In order to accelerate the curing process, it is recommended to irradiate the lenses to be glued on a piece of white paper.

Curing Times

Using an ordinary UV sun light approx. 30 cm above the element.
Pre-Curing: 20 minutes
Full-Curing: 90 minutes

Using long-wave UV light (365 nm) approx. 25 mm above the element.
Pre-Curing: 10 minutes
Full-Curing: 1 hour

Technical Data

Viscosity: 275 cps to 320 cps
Refractive Index: 1,55 at 25°C (full cured) resp. 1,53 (uncured)
Operational Temperature Range: -54°C (-65°F) to +100°C (+212°F)
Youngs Modul: 6,2 x 105 lb/inch
Shear Strength: 5,200 lb/inch2
Dielectric Contrast: 3 at 106 cps
Water Absorption: 0,3% (24 hours, 25°C)
Shrinking in Cure: approx. 4%
pH: 3,2
Specific Gravity: 1,22
Shore D Hardness: > 90
Thermal Conductivity: 500 x 10–6 cal (sec) (cm2) (°C) (cm)
Flash Point (uncured): 50°C
Outgassing CVCM: 0.13 %
Shipping and Storage: Should be kept from intense light and elevated temperatures.

Shelf Life: 18 months from date of manufacture.

Packing Size: 114 g (4 oz).