HMC Electronics 12292 User Manual

Technical Data Sheet

LOCTITE® 444™

March-2010

PRODUCT DESCRIPTION

LOCTITE® 444™ provides the following product
characteristics:

Technology Cyanoacrylate
Chemical Type Ethyl cyanoacrylate
Appearance Colorless transparent liquid

LMS

Components One part - requires no mixing
Viscosity Medium

Cure Humidity
Application Bonding

Key Substrates Rubbers, Plastics and Metals

LOCTITE® 444™ is a single part, fast curing medium viscosity
cyanoacrylate adhesive formulated for electronics applications.
LOCTITE® 444™ is designed to use with TAK PAK®
Accelerators to attain instant cures for tacking electronics
components . Typical applications include wire tacking to coil
forms; tamper proofing adjustable components; mounting
standoffs, edge guides and stiffeners to circuit boards.

Commercial Item Description A-A-3097:

LOCTITE® 444™ 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 1.05
Viscosity, Brookfield - LVF, 25 °C, mPa·s (cP):

Spindle 2, speed 30 rpm 550 to 850

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. 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,
ISO 11359-2, K

-1

80×10

-5

Coefficient of Thermal
Conductivity, ISO 8302,
W/(m·K)

0.11

Glass Transition Temperature,
ASTM E 228, °C

130

Electrical Properties:

Volume Resistivity, IEC 60093,
Ω·cm

7.2×10

15

Surface Resistivity, IEC 60093,Ω66×10

15

Dielectric Breakdown Strength,
IEC 60243-1, kV/mm

36.6

Dielectric Constant / Dissipation Factor, IEC 60250:

1-kHz 3.0 / 0.028

TYPICAL PERFORMANCE OF CURED MATERIAL

Cured for 2 minutes @ 22 °C

Lap Shear Strength, ISO 4587:

Steel (grit blasted) N/mm² ≥5.4

LMS

(psi) (≥780)

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.

Apply one coating of TAK PAK® accelerator to the area to
be bonded, by spray, brush or dipping. Prior to
application, contaminated surfaces may need special
cleaning or degreasing to remove any dissolvable
contamination.

NOTE: Because the solvent base of TAK PAK® accelerators
can affect certain plastics or coatings, checking all surfaces for
compatibility is recommended.

.

2. Allow the accelerator time to evaporate under good
ventilation until the surfaces are completely dry (approx.
15 to 30- seconds)..

Documentation Provided By HMC Electronics

33 Springdale Ave. Canton, MA 02021

http://www.hmcelectronics.com

[phone]

TDS LOCTITE® 444™, March-2010

3.

Apply LOCTITE® 444™ cyanoacrylate product
immediately after solvent has dried.

NOTE: If cyanoacrylate is not applied to the accelerator within
45 seconds, accelerator should be reapplied

.

4. Where possible, move surfaces in relation to each other
for a few seconds on assembly to properly distribute the
adhesive and for maximum activation..

5. Secure the assembly and await fixturing before any
further handling..

Loctite Material Specification

LMS

LMS dated December-28, 1999. 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
µm / 25.4 = mil
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·m x 0.738 = lb·ft
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
interpreted as representation that they are free from
domination of patents owned by others or as a license under
any Henkel Corporation patents that may cover such
processes or compositions. We recommend that each
prospective user test his proposed application before repetitive
use, using this data as a guide. This product may be covered
by one or more United States or foreign patents or patent
applications.

Trademark usage

Except as otherwise noted, all trademarks in this document
are trademarks of Henkel Corporation in the U.S. and
elsewhere. ® denotes a trademark registered in the U.S.
Patent and Trademark Office.

Reference 1.3

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

http://www.hmcelectronics.com

[phone]