Loctite ® 495 specifications

Loctite ® 495
PRODUCT DESCRIPTION
LOCTITE® 495 provides the following product characteristics:

Technology                     Cyanoacrylate

Chemical Type                  Ethyl cyanoacrylate

Appearance (uncured)        Transparent, colorless to straw colored liquid

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

Temperature: 25 °C, Shear Rate: 3,000 s-1                   20 to 45

Spindle 1, speed 30 rpm                                              20 to 60

Vapor 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.

 

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-1                            100×10-6

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, O·cm                                               2×1015 to 10×1015

Surface Resistivity, ASTM D 257, O                                                    10×1015 to 80×1015

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)

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/mm2                             <0.50

                                                                     (lb/in)                            (<2.80)

After 10 seconds @ 22 °C

Tensile Strength, ISO 6922:

Buna-N                                                        N/mm²                             =6.00

                                                                    (psi)                               (=870)

 

TYPICAL ENVIRONMENTAL RESISTANCE

After 1 week @ 22 °C

Lap Shear Strength, ISO 4587:

Mild steel (grit blasted)

 

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 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

 

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

LOCTITE is a trademark of Henkel Corporation

 

For the most direct access to local sales and technical support visit: www.loctite.com

Article Title:
Loctite ® 495 specifications
Article Summary:
Properties, Cure Speed, Performance, Resistance, Directions, and Storage
Article Date:
6/10/2008
Article ID:
464
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