Loctite Aa 349 High Temperature Wicking Grade Adhesive 50ml

Loctite Aa 349 High Temperature Wicking Grade Adhesive 50ml

• Shear Strength, Grit Blasted Steel to Glass : 1600psi
• Temperature : -65 - 266 °F
• Viscosity : 9500 mPa.s (cP) Brookfield
• Key Substrates : Glass, Metal
• Color : Clear, Yellow: Light Yellow
• Curing Type : Ultraviolet (UV) light
• Application : Bonding

 

LOCTITE® AA 349 is a colorless to pale yellow, transparent, modified methacrylate ester acrylic. Bonds and seals glass to glass or glass to metal components such as precision optical instruments, furniture and industrial devices. The electrical properties of this product also make it suitable for potting and tacking applications.

• Bonds and seals glass to glass or glass to metal components
• Used in precision optical instruments, furniture and industrial devices
• Suitable for potting and tacking applications

 
LOCTITE® AA 349™ bonds and seals glass to glass, or glass
to metal components such as precision optical instruments,
furniture and industrial devices. The electrical properties of this
product also make it suitable for potting and tacking
applications

TYPICAL CURING PERFORMANCE

This product is cured when exposed to UV radiation of 365nm.
To obtain a full cure on surfaces exposed to air radiation at
250nm is also required. The speed of cure will depend on the
UV intensity as measured at the product surface. Typical cure
condition is 20-30 seconds at 100mW/cm² using a medium
pressure, quartz envelope, mercury vapor lamp.

Fixture Time

UV fixture time is defined as the light exposure time
required to develop a shear strength of 0.1 N/mm².
UV Fixture Time, Glass, seconds:
Medium pressure mercury arc:
10 mW/cm², measured @ 365 nm, 3 to 8
100 mW/cm², measured @ 365 nm, 1 to 5

Tack Free Time

Tack Free Time is the time required to achieve a tack free
surface
Tack Free Time, seconds:
Medium pressure mercury arc:
100 mW/cm², measured @ 365 nm 5 to 10

Depth of Cure

The graph below shows the increase in depth of cure with time
at 100mW/cm² as measured from the thickness of the cured
pellet formed in a 15mm diameter PTFE die.

GENERAL INFORMATION

This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the
Safety Data Sheet (SDS).

Directions for use:

1. This product is light sensitive; exposure to daylight, UV
   light and artificial lighting should be kept to a minimum
   during storage and handling.
2. The product should be dispensed from applicators with
   black feedlines.
3. For best performance bond surfaces should be clean and
   free from grease.
4. Cure rate is dependent on lamp intensity, distance from
   light source, depth of cure needed or bondline gap and
   light transmittance of the substrate through which the
   radiation must pass.
5. Recommended intensity for cure in bondline situation is
   40 mW/cm² minimum (measured at the bondline) with an
   exposure time of 4-5 times the fixture time at the same
   intensity.
6. For dry curing of exposed surfaces, higher intensity UV is
   required (100 mW/cm²).
7. Cooling should be provided for temperature sensitive
   substrates such as thermoplastics.
8. Plastic grades should be checked for risk of stress
   cracking when exposed to liquid adhesive.
9. Excess adhesive can be wiped away with organic solvent.
10. Bonds should be allowed to cool before subjecting to any
    service loads.

Loctite Material Specification

LMS dated September-1, 1995. Test reports for each batch
are available for the indicated properties. LMS test reports
include selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.

Storage

Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
labeling.
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.