HMC Electronics 38050 User Manual
Technical Data Sheet
LOCTITE®380
May-2004
PRODUCT DESCRIPTION
LOCTITE®380 provides the following product characteristics:
Technology Cyanoacrylate
Chemical Type Ethyl cyanoacrylate
Appearance (uncured) Black liquid
LMS
Components One part - requires no mixing
Viscosity Medium
Cure Humidity
Application Bonding
Key Substrates Metals, Plastics and Rubbers
LOCTITE®380 is a rubber toughened adhesive with increased
flexibility and peel strength along with enhanced resistance to
shock.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.1
Viscosity, Brookfield - RVT, 25 °C, mPa·s (cP):
Spindle 3, speed 50 rpm 100 to 800
LMS
Flash Point - See MSDS
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, ISO 4587, seconds:
Steel (degreased) 60 to 120
Aluminum 10 to 30
Neoprene 15 to 25
Rubber, nitrile 15 to 25
ABS 20 to 50
PVC 50 to 100
Polycarbonate 30 to 90
Phenolic 20 to 60
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. 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.
TYPICAL PROPERTIES OF CURED MATERIAL
After 24 hours @ 22 °C
Physical Properties:
Coefficient of Thermal Expansion, ASTM D 696, K-180×10
-6
Coefficient of Thermal Conductivity, ASTM C 177,
W/(m·K)
0.1
Glass Transition Temperature, ASTM E 228, °C 120
Electrical Properties:
Dielectric Constant / Dissipation Factor, ASTM D 150:
0.05-kHz 2.65 / <0.02
1-kHz 2.75 / <0.02
1,000-kHz 2.75 / <0.02
Volume Resistivity, ASTM D 257, Ω·cm 10×10
15
Dielectric Breakdown Strength, ASTM D 149, kV/mm 25
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
After 24 hours @ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² 26
(psi) (3,770)
Aluminum (etched) N/mm² 18
(psi) (2,610)
ABS N/mm² >6
(psi) (>870)
PVC N/mm² >4
(psi) (>580)
Polycarbonate N/mm² >5
(psi) (>725)
Phenolic N/mm² 10
(psi) (1,450)
Neoprene N/mm² >10
(psi) (>1,450)
Nitrile N/mm² >10
(psi) (>1,450)
Tensile Strength, ISO 6922:
Steel (grit blasted) N/mm² 18.5
(psi) (2,700)
After 48 hours @ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² ≥17.2
LMS
(psi) (≥2,495)
Cured for 24 hours @ 22 °C, followed by 24 hours @ 121 °C,
tested @ 121 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² ≥6.9
LMS
(psi) (≥1,000)
Cured for 24 hours @ 22 °C, followed by 24 hours @ 121 °C,
tested @ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² ≥19.3
LMS
(psi) (≥2,800)
Documentation Provided By HMC Electronics
33 Springdale Ave. Canton, MA 02021
http://www.hmcelectronics.com
(800) 482-4440
TDS LOCTITE®380 , May-2004
Cured for 24 hours @ 22 °C, followed by 4 hours @ 121 °C,
tested @ 22 °C
180° Peel Strength, ISO 8510-2:
Steel (grit blasted) N/mm ≥2.6
LMS
(lb/in) (≥14.85)
TYPICAL ENVIRONMENTAL RESISTANCE
After 1 week @ 22 °C
Lap Shear Strength, ISO 4587:
Mild steel (grit blasted)
Hot Strength
Tested at temperature
% RT Strength
Temperature, °C
100
75
50
25
0
0 60 80 100 120
Heat Aging
Aged at temperature indicated and tested @ 22 °C
% Initial Strength at RT
Hours
150
125
100
75
50
25
0
0 100 500 1000 5000
80°C
100°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 40 85 85 85
Gasoline 22 90 70 70
Isopropanol 22 75 75 75
Industrial Methylated
spirit
22 95 95 80
1,1,1 Trichloroethane 22 80 70 50
Freon TA 22 90 90 85
Heat/Humidity 95% RH 40 80 80 65
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).
Directions for use
1. For best performance bond surfaces should be clean and
free from grease.
2. This product performs best in thin bond gaps (0.05 mm).
3. Excess adhesive can be dissolved with Loctite cleanup
solvents, nitromethane or acetone.
Loctite Material Specification
LMS
LMS dated September-01, 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: 2 °C to 8 °C. Storage below 2 °C or
greater than 8 °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.
Conversions
(°C x 1.8) + 32 = °F
kV/mm x 25.4 = V/mil
mm / 25.4 = inches
N x 0.225 = lb
N/mm x 5.71 = lb/in
N/mm² x 145 = psi
MPa x 145 = psi
N·m x 8.851 = lb·in
N·mm x 0.142 = oz·in
mPa·s = cP
Note
The data contained herein are furnished for information only
and are believed to be reliable. We cannot assume
responsibility for the results obtained by others over whose
methods we have no control. It is the user's responsibility to
determine suitability for the user's purpose of any production
methods mentioned herein and to adopt such precautions as
may be advisable for the protection of property and of persons
against any hazards that may be involved in the handling and
use thereof. In light of the foregoing, Henkel Corporation
specifically disclaims all warranties expressed or implied,
including warranties of merchantability or fitness for a
particular purpose, arising from sale or use of Henkel
Corporation’s products. Henkel Corporation specifically
disclaims any liability for consequential or incidental
damages of any kind, including lost profits. The discussion
herein of various processes or compositions is not to be
Henkel Loctite Americas
+860.571.5100
Henkel Loctite Europe
+49.89.9268.0
Henkel Loctite Asia Pacific
+81.45.758.1810
For the most direct access to local sales and technical support visit: www.loctite.com
Documentation Provided By HMC Electronics
33 Springdale Ave. Canton, MA 02021
http://www.hmcelectronics.com
(800) 482-4440
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