TYPE UV-69

Type UV-69 was developed to eliminate mixing catalysts with the cement. Cure is achieved using an ordinary G.E. ultraviolet sun lamp or equivalent. Heat itself will not cause cure. It is recommended that lenses cemented with type UV-69 be irradiated on a sheet of white paper to expedite cure.

12400

Lens Bond Type UV-69,

bottle w/catalyst

4oz

13003

Thinner (Monomeric styrene)

4oz

13004

Plasticizer Modifications

.5-5%

 

 

Approximate Curing Times

Pre-Cure Full-Cure
*Using a GE Ultraviolet Sun lamp at 12" from Element
20 minutes 90 minutes
*Using Long Wave Radiation (365nm) at 1" from Element
10 minutes 1 hour
For more information on our ultraviolet curing lamps please see our cementing department supply section of our web site.

Instructions For Use

Application and Curing of Type UV-69 Place the prepared LENS BOND on the concave surface, and place the convex surface thereon. Press down firmly and gently until LENS BOND completely wets the matching surfaces. Then, with a slow rotary motion and light pressure, force air bubbles from between the lenses. Excess Cement can be removed with a cloth slightly moistened with alcohol or acetone. (Excess solvent will remove cement from between the cemented components.) Place the cemented doublets 12" beneath the sun lamp and irradiate them for 20 minutes. After pre-cure, holding devices can be removed and cleaned.

Irradiate for an additional 90 minutes for full-cure.

Before environmental testing, however, the lenses must be fully cured.

Full-cure time is in addition to the pre-cure time. If there is no reason to remove holding devices after pre-cure, components should be cured for the total time (pre-cure plus full-cure). Depending on the components and conditions, if there is any doubt about cure being achieved, allow components to cure for a longer period of time. The Cement will not overcure.

Safety: Although LENS BOND is quite safe to use, some persons may be sensitive to the chemicals comprising the formulation. For them, the use of finger cots or gloves is recommended. Adequate ventilation should be provided.

Note: If the elements will undergo hostile environmental tests, allow 48 to 72 hours between full-cure and testing.

Specifications

Viscosity........................275 cps. to 320 cps. 
Refractive Index (full-cured)....1.55 at 25캜 
Refractive Index (uncured).......1.53 
Operational Temperature Range....-54?(-65캟) to 100캜(212캟) 
Youngs Modulus...................6.2 x 10-5lbs/in2 
Shear Strength...................5200 lbs/in2 
Impact...........................(.3 to .4)ft lb/in 
Specific Heat....................(.2 to .4) Cal/gm 
Dielectric Constant..............3 at 106 cps 
Loss Factor at 106 cps...........(.05) 
Water Absorption.................0.3% (24 hours. 25컊n bulk material)
Dispersion Formula...............n=1.5754-(0.04742)-[0.0070/(2-0.028)]
+[0.0011/(2-0.028)2] Shrinkage on Cure................Approximately 4% pH...............................3.2 Specific Gravity.................1.22 Shore D. Hardness................Approximately 90 Surface Tension..................44 Dynes/cm. Linear Coefficient of Expansion..Approximately 6.3x10-5/캜 at between 27캜-100캜 5.58x10-5/캜 between 100캜-200캜 Thermal Conductivity.............500x10-6 cal(sec)(sq.cm)(캜)(cm) Flash Point (uncured)............50캜 Glass Transition (Tg)............>90캜 Outgassing TML...................1.5% Outgassing CVCM..................0.13% Shipping and Storage.............Type UV-69 needs no special handling or storage. It should, however, be kept away from intense light and elevated temperatures. Shelf Life.......................18 months from date of manufacture Size ............................114 gm(4oz)
*For technical data on adhesion properties, solvent and thermal resistance 
as well as transmission studies, please go to our technical data section 
on this site.