HMC Electronics 66040-LOC Loctite 660 Retaining Compound, Quick Metal User Manual
Page 2
TDS LOCTITE
®
660™, December
-
2009
Cure Speed vs. Activator
Where cure speed is unacceptably long, or large gaps are
present, applying activator to the surface will improve cure
speed. The graph below shows the shear strength developed
with time on zinc dichromate steel pins and collars using
Activator 7471™ and 7649™ and tested according to ISO
10123.
% of Full Strength on Steel
Cure Time
100
75
50
25
0
1min
5min10min 30min 1h
3h 6h
24h
72h
Activator 7471™
Activator 7649™
No activator
TYPICAL PROPERTIES OF CURED MATERIAL
Physical Properties:
Coefficient of Thermal Expansion,
ISO 11359-2, K
-1
80×10
-6
Coefficient of Thermal Conductivity, ISO 8302,
W/(m·K)
0.1
Specific Heat, kJ/(kg·K)
0.3
Elongation, at break, ISO 37, %
<2
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
After 24 hours @ 22 °C
Compressive Shear Strength, ISO 10123:
Steel pins and collars
N/mm² ≥17.2
LMS
(psi) (2,490)
TYPICAL ENVIRONMENTAL RESISTANCE
Cured for 1 week @ 22 °C
Compressive Shear Strength, ISO 10123:
Steel pins and collars
Hot Strength
Tested at temperature
% Strength @ 22 °C
Temperature, °C
100
75
50
25
0
-50
0
50
100
150
Heat Aging
Aged at temperature indicated and tested @ 22 °C
% Initial Strength @ 22 °C
Exposure Time, hours
200
150
100
50
0
0
1000
2000
3000
4000
5000
120 °C
150 °C
Chemical/Solvent Resistance
Aged under conditions indicated and tested @ 22 °C.
% of initial strength
Environment
°C
100 h
500 h
1000 h
Motor oil (MIL-L-46152)
125
100
100
100
Unleaded gasoline
22
100
100
100
Brake fluid
22
80
75
75
Water/glycol 50/50
87
100
90
80
Ethanol
22
95
95
95
Acetone
22
80
80
80
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
Material Safety Data Sheet (MSDS).
Where aqueous washing systems are used to clean the
surfaces before bonding, it is important to check for
compatibility of the washing solution with the adhesive. In
some cases these aqueous washes can affect the cure and
performance of the adhesive.
This product is not normally recommended for use on plastics
(particularly thermoplastic materials where stress cracking of
the plastic could result). Users are recommended to confirm
compatibility of the product with such substrates.
Directions for use:
For Assembly
1. For best results, clean all surfaces (external and internal)
with a LOCTITE
®
cleaning solvent and allow to dry.
2. If the material is an inactive metal or the cure speed is too
slow, spray with Activator 7471™ or 7649™ and allow to
dry.
3. For Slip Fitted Assemblies, apply adhesive around the
leading edge of the pin and the inside of the collar and
use a rotating motion during assembly to ensure good
coverage.
4. For Press Fitted Assemblies, apply adhesive thoroughly
to both bond surfaces and assemble at high press on
rates.
Henkel Americas
+860.571.5100
Henkel Europe
+49.89.320800.1800
Henkel Asia Pacific
+86.21.2891.8863
For the most direct access to local sales and technical support visit: www.henkel.com/industrial
Documentation Provided By HMC Electronics
33 Springdale Ave. Canton, MA 02021
(800) 482-4440