Norland Optical Adhesive 1665

Norland Optical Adhesive 1665 is a yellow tinted liquid adhesive that will cure to a clear film when exposed to long wave ultraviolet and/or visible light. NOA 1665 is recommended for bonding glass to glass. Adhesion is
also good to CAB, polycarbonate and other plastics. The adhesive when fully cured is very rigid and brittle.  NOA 1665 can be cured with ultraviolet light from 315nm to 395nm. Peak absorption is 365nm. It can also be cured with visible light from 400nm to 450nm. Full cure requires 6 Joules/cm2. If used as a coating or exposed to air the adhesive will need to be cured under a nitrogen atmosphere to prevent the surface from remaining tacky due to oxygen inhibition


Typical Properties of NOA 1665



Refractive Index


Temperature Range

-15° to 100° C

Viscosity @ 25C

 800-1000 cps

Shore D         60



Keep NOA 1665 in a cool(5-22 ° C) dark place. If refrigerated, allow the adhesive to come to room temperature before using.


Care should be taken in handling the this material. The material Safety Data Sheet should be read for this product. Prolonged contact with skin should be avoided and affected areas should be washed thoroughly with copious amounts of soap and water. If adhesive gets into eyes, flush with water for 15 minutes and seek medical attention.



Spectral Transmission of NOA 1665

(thru 1 mil film thickness)

nm                         %T

600-2000               99.5

       550                        98.6      

500                         98.3

450                         97.6

400                         95.8

350                         81.2



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