PRODUCT DESCRIPTION

LOCTITE HHD 8540 provides the following product

characteristics:

Technology

Acrylic

Chemical Type

Methacrylate

Appearance - Part A

Off-white paste

Appearance - Part B

Blue paste

Appearance - Mixed

Light blue

Mix Ratio by volume,

Part A:Part B

10 : 1

Cure

Room temperature

Application

Device assembly, Structural bonding

LOCTITE HHD 8540 two component methacrylate adhesive

system is designed for use in handheld device cover assembly

applications. This material reacts when mixed and is fully cured

at room temperature. Typical applications for LOCTITE HHD

8540

include

structural

bonding

of

plastic

and

metal

components that must withstand vibrations and impacts such

as in portable devices.

TYPICAL PROPERTIES OF CURED MATERIAL

Physical Properties

Tensile Modulus, N/mm²

1,303

Elongation, %

45

Glass Transition Temperature, °C

84

TYPICAL PERFORMANCE OF CURED MATERIAL

Cured for 20 minutes @ 80 °C plus 24 hours at room

temperature, ISO 4587

Shear Strength :

Tensile Strength at break, N/mm²

25

Lap Shear Strength , on IXEF, MPa

14.0

Cross Lap Shear Strength , on IXEF, MPa

3 to 4

GENERAL INFORMATION

For safe handling information on this product, consult the

Safety Data Sheet, (SDS).

DIRECTIONS FOR USE

Mixing

1. Product LOCTITE HHD 8540 is typically applied either

with the use of meter mix equipment or directly out of

cartridges through static mix nozzles. These methods of

application ensure that component A and B are dispensed

and mixed at the proper ratio. When properly mixed,

LOCTITE HHD 8540 should achieve a uniform color.

2. When dispensed in a large mass heat buildup during and

after mixing is normal. To reduce the likelihood of

exothermic reaction or excessive heat buildup, mix less

than 100 grams at a time. Mixing smaller amounts will

minimize heat buildup.

Application

1. For best performance, surfaces should be clean and

residue free prior to adhesive application.

2. To assure maximum bond strength, surfaces must be

mated within the adhesive's open time.

3. Use enough material to completely fill the joint when parts

are clamped.

Clean up

1. It is important to clean up excess adhesive from the work

area and application equipment before it cures.

2. Excess uncured adhesive can be cleaned with ketone

type solvents.

3. Cured adhesive typically requires mechanical abrasion for

removal.

4. Always test the suitability and effect of any cleaning

method on the specific materials that it will come in

contact with first.

STORAGE:

Store product in the unopened container in a dry location.

Storage information may be indicated on the product container

labeling.

Optimal Storage : 2 to 8 °C

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