HMC Electronics 49550 User Manual

Technical Data Sheet

LOCTITE® 495

May-2004

PRODUCT DESCRIPTION

LOCTITE® 495 provides the following product characteristics:

Technology Cyanoacrylate
Chemical Type Ethyl cyanoacrylate
Appearance (uncured) Transparent, colorless to straw

colored liquid

LMS

Components One part - requires no mixing
Viscosity Low

Cure Humidity
Application Bonding

Key Substrates Plastics, Rubbers and Metals

LOCTITE® 495 is a general purpose cyanoacrylate instant
adhesive.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Specific Gravity @ 25 °C 1.05
Viscosity, Cone & Plate, mPa·s (cP):

Temperature: 25 °C, Shear Rate: 3,000 s

-1

20 to 45

LMS

Viscosity, Brookfield - LVF, 25 °C, mPa·s (cP):

Spindle 1, speed 30 rpm 20 to 60
Vapour Pressure, hPa <1
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:

Mild Steel (degreased) 10 to 30
Aluminum (degreased) 5 to 15
Zinc Dichromate 30 to 90
Neoprene <5
Rubber, Nitrile <5
ABS 10 to 30
PVC 3 to 10
Polycarbonate 20 to 60
Phenolic 5 to 20

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.

% Full Cured Strength @ RT

Cure 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.

TYPICAL PROPERTIES OF CURED MATERIAL

After 24 hours @ 22 °C

Physical Properties:

Coefficient of Thermal Expansion, ASTM D 696, K-1100×10

-6

Coefficient of Thermal Conductivity, ASTM C 177,
W/(m·K)

0.10

Softening Point, °C 165

Electrical Properties:

Dielectric Constant / Dissipation Factor, ASTM D 150:

0.10-kHz 2 to 3.30 / <0.02
1-kHz 2 to 3.50 / <0.02
10-kHz 2 to 3.50 / <0.02

Volume Resistivity, ASTM D 257, Ω·cm 2×10

15

to 10×10

15

Surface Resistivity, ASTM D 257, Ω 10×10

15

to 80×10

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 12 to 26

(psi) (1,740 to 3,770)

Aluminum (grit blasted) N/mm² 12 to 19

(psi) (1,740 to 2,755)

Zinc Dichromate N/mm² 6 to 13

(psi) (870 to 1,885)

ABS N/mm² 6 to 20

(psi) (870 to 2,900)

PVC N/mm² 6 to 20

(psi) (870 to 2,900)

Polycarbonate N/mm² 5 to 20

(psi) (725 to 2,900)

Phenolic N/mm² 5 to 15

(psi) (725 to 2,175)

Neoprene N/mm² 5 to 15

(psi) (725 to 2,175)

Documentation Provided By HMC Electronics

33 Springdale Ave. Canton, MA 02021

http://www.hmcelectronics.com

[phone]

TDS LOCTITE® 495, May-2004

Nitrile N/mm² 5 to 15

(psi) (725 to 2,175)

Tensile Strength, ISO 6922:

Steel N/mm² 12 to 25

(psi) (1,740 to 3,625)

Buna-N N/mm² 5 to 15

(psi) (725 to 2,175)

"T" Peel Strength, ISO 11339:

Steel (degreased) N/mm <0.50

(lb/in) (<2.80)

After 10 seconds @ 22 °C

Tensile Strength, ISO 6922:

Buna-N N/mm² ≥6.00

LMS

(psi) (≥870)

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

-50 0 50 100 150

Heat Aging

Aged at temperature indicated and tested @ 22 °C

% Initial Strength at RT

Hours

125

100

75

50

25

0

0 1000 2000 3000 4000 5000

80°C

100°C

60°C

Chemical/Solvent Resistance

Aged under conditions indicated and tested @ 22 °C.

% of initial strength

Environment °C 100 hr 500 hr 1000 hr

Motor Oil 40 100 100 95

Gasoline 22 100 100 100

Isopropanol 22 100 100 100

Ethanol 22 100 100 100

Freon TA 22 100 100 100

1,1,1 Trichloroethane 22 100 100 100

Heat/Humidity 95% RH 40 80 75 65

Heat/Humidity 95% RH
on Polycarbonate

40 100 100 100

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 December-03, 2002. 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 Loctite 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

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

[phone]