Lord 521
General Purpose, Long Working Time, Acrylic Adhesive
Description
Lord®
521 is an acrylic adhesive which offers a
long working time. It will bond a
variety of plastics and prepared metals.
Features and Benefits
Room Temperature Cure -
reduces energy costs because no heat
is necessary.
Extended Open-Time - provides open-time that is well-suited for large parts, long bondlines and part repositioning.
Environmental and
Chemical Resistance -
resists dilute
acids, alkalis, solvents, greases, oils,
moisture, and weathering. Performs at temperatures from -40°C to 149°C
(-40° F to 300° F). Provides excellent UV exposure resistance.
Surface Preparation
All substrates to be bonded must be free of grease,
oil, mold release agents and other contaminants. Thermoset plastics may
require mechanical abrasion. Metals may be abraded and solvent wiped,
primed or prepared chemically by some other method, prior to bonding.
No-Mix
Lord 521 resin can be used with No-Mix accelerators
such as Lord Accelerator 4. This accelerator
can be brushed, wiped, sprayed, or dipped onto one or both
of the substrates to be bonded. When
applied to one substrate, Lord Accelerator 4 will cure bondline
thickness up to 0.025 inches. For bondlines
greater than 0.025 and up to 0.060
inches, apply the accelerator to both substrates. The accelerator
will dry to an off-white crystalline film in approximately one to three
minutes. Once dry, place acrylic adhesive resin on the other substrate
to be bonded, and join the parts. A part coated with Lord Accelerator 4
can be stored for a number of weeks if kept below 27°C (80°F) and out of
direct light, especially sun-light.
|
Appearance |
Lord 521 Amber syrup |
Accelerator 4 Hazy liquid |
Accelerator 17
Off-white to |
Accelerator 19 Off-white paste |
|
Viscosity, cP |
25,000 - 75,000 |
10 |
10,000 - 100,000 |
150,000 - 450,000 |
|
Density |
971 - 1031 |
1222 - 1282 |
1150 - 1246 |
1426 - 1546 |
|
Flash Point, closed cup |
3°C (37° F) |
>93°C (>200° F) |
>93°C (>200° F) |
>93°C (>200° F) |
|
Working Time |
20 - 30 Minutes |
— |
— |
— |
|
Handleable Bonds |
40 - 50 Minutes |
— |
— |
— |
|
Mix Ratio |
10 Parts |
No-Mix |
1 Part |
5 Parts |
|
Shelf Life |
6 Months |
6 Months |
6 Months |
6 Months |
*Data is typical and not to be used for specification purposes.
Technical Data Sheet for Lord 521
For more information about Lord 521 contact Bergdahl Associates, Inc.
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Date issued: 07/05