Data Sheet

Technical Data Sheet
LOCTITE
®
496™
November-2010
PRODUCT DESCRIPTION
LOCTITE
®
496™ provides the following product
characteristics:
Technology Cyanoacrylate
Chemical Type Methyl cyanoacrylate
Appearance (uncured) Transparent, colorless liquid
LMS
Components One part - requires no mixing
Viscosity Low
Cure Humidity
Application Bonding
Key Substrates Metals , Rubbers and Plastics
LOCTITE
®
496™ is a general purpose adhesive and is
particularly suited to bonding of metal substrates.
Commercial Item Description A-A-3097:
LOCTITE
®
496™ has been qualified to Commercial Item
Description A-A-3097. Note: This is a regional approval.
Please contact your local Technical Service Center for more
information and clarification.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.1
Flash Point - See SDS
Viscosity, Cone & Plate, mPa·s (cP):
Temperature: 25 °C, Shear Rate: 3,000 s
-1
70 to 120
LMS
Viscosity, Brookfield - LVF, 25 °C, mPa·s (cP):
Spindle 1, speed 30 rpm, 100 to 150
TYPICAL CURING PERFORMANCE
Under normal conditions, the atmospheric moisture initiates the
curing process. Although full functional strength is developed
in a relatively short time, curing continues for at least 24 hours
before full chemical/solvent resistance is developed.
Cure Speed vs. Substrate
The rate of cure will depend on the substrate used. The table
below shows the fixture time achieved on different materials
at 22 °C / 50 % relative humidity. This is defined as the time to
develop a shear strength of 0.1 N/mm².
Fixture Time, seconds:
Steel (degreased) 20 to 40
Aluminum 30 to 60
Zinc dichromate 30 to 60
Neoprene <10
Rubber, nitrile <10
ABS 10 to 30
PVC 30 to 70
Polycarbonate 20 to 70
Phenolic 10 to 30
Cure Speed vs. Bond Gap
The rate of cure will depend on the bondline gap. Thin bond
lines result in high cure speeds, increasing the bond gap will
decrease the rate of cure.
Cure Speed vs. Humidity
The rate of cure will depend on the ambient relative humidity.
The following graph shows the tensile strength developed with
time on Buna N rubber at different levels of humidity.
% of Full Cured Strength
Time, seconds
100
75
50
25
0
0 10 20 30 40 50 60
60% RH
40% RH
20% RH
Cure Speed vs. Activator
Where cure speed is unacceptably long due to large gaps,
applying activator to the surface will improve cure speed.
However, this can reduce ultimate strength of the bond and
therefore testing is recommended to confirm effect.