LORD® 7550 adhesive is an equal-mix, two-component clear urethane adhesive system used to bond Lexan®, ABS, polycarbonate and other plastics. This adhesive will also bond primed metals.
Unit of Measure

Typical Properties

Appearance

N/A Clear Liquid

Viscosity at 77 Degree Fahrenheit (ºF) (25 Degree Celsius (ºC)) Temperature

N/A 1800 to 4000 cP

Density

N/A 9.6 to 9.8 lb/gal1150 to 1174 kg/m³

Flash Point (Closed Cup) Temperature

N/A >200 ºF>93 ºC

Note for Typical Properties

N/A Data is typical and not to be used for specification purposes.

Typical Properties of Resin Mixed with Curative

Mix Ratio by Volume, Resin to Curative

N/A 1:1

Solids Content by Weight

N/A 100 %

Working Time at 75 Degree Fahrenheit (ºF) (24 Degree Celsius (ºC)) Temperature

N/A 3 to 5 minutes

Purge Time at 75 Degree Fahrenheit (ºF) (24 Degree Celsius (ºC)) Temperature

N/A 2 to 3 minutes

Time to Handling Strength at 75 Degree Fahrenheit (ºF) (24 Degree Celsius (ºC)) Temperature

N/A 60 minutes

Note for Typical Properties of Resin Mixed with Curative

N/A Data is typical and not to be used for specification purposes. Given a 1/2" (12.5 mm) diameter bead.

Shelf Life/Storage

Shelf Life/Storage

N/A Shelf life is six months when stored in a clean, dry environment at 70-80 ºF (21-27 ºC) in original, unopened container.

After opening, protect adhesive from excessive exposure to moisture by installing desiccant cartridges and/or using dry nitroge

Specifications

Shelf Life

N/A 6 months

Note

N/A Lexan® is a trademark of SABIC Innocative Plastics.

Features

Non-Flammable

N/A Does not require explosion-proof equipment.

Environmentally Recommended

N/A Does not contain ozone depleting chemicals.

Environmentally Resistant

N/A Resists sunlight, weathering, humidity and salt spray.

Chemically Resistant

N/A Solvent resistant when cured. Painting and most cleaning processes do not affect bond strength.

Self-Leveling

N/A Flows into hard-to-reach spaces, excellent for bonding parts with tight tolerances.

Applications

Surface Preparation

N/A Surfaces should be free of grease, dirt and other contaminants. For plastics, clean the surface with a dry rag wipe or a rag dampened with solvent. For metals, prime or grit blast the surface, then solvent wash for optimum bond performance.

Mixing

N/A Mix resin with the curative at a 1:1 ratio, by volume. Handheld cartridges will automatically dispense the correct volumetric ratio of each component.

Applying

N/A Apply adhesive using handheld cartridges. Assemble parts within working time of the adhesive.

Curing

N/A LORD® 7550 adhesive will cure to full strength in approximately 72 hours at room temperature.

Cleanup

N/A Clean equipment and tools prior to the adhesive cure with organic solvents such as isopropyl alcohol. Once adhesive is cured, heat the adhesive to 300 ºF (149 ºC) or above to soften the adhesive. This allows the parts to be separated and the adhesive to be more easily removed.

Additional Information

Additional Information

N/A Values stated in this technical data sheet represent typical values as not all tests are run on each lot of material produced.

Information provided herein is based upon tests believed to be reliable. In as much as LORD® Corporation has no control over the manner in which others may use this information, it does not guarantee the results to be obtained. In addition, LORD® Corporation does not guarantee the performance of the product or the results obtained from the use of the product or this information where the product has been repackaged by any third party, including but not limited to any product end-user. Nor does the company make any express or implied warranty of merchantability or fitness for a particular purpose concerning the effects or results of such use.

LORD® and "Ask Us How™" are trademarks of LORD® Corporation or one of its subsidiaries.

LORD® provides valuable expertise in adhesives and coatings, vibration and motion control, and magnetically responsive technologies. Our people work in collaboration with our customers to help them increase the value of their products. Innovative and responsive in an ever-changing marketplace, we are focused on providing solutions for our customers worldwide. Ask Us How™.