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LORD® 7421 Urethane Adhesive Where To Buy


Product Information

LORD® 7421 adhesive is a single-component, moisture-cure urethane adhesive offering quality adhesion performance and non-conductive properties. It successfully bonds Hytrel®, chlorinated polyethylene (CPE), thermoplastic polyurethane (TPU), Nylon 11 and other thermoplastics to fiber reinforcements, such as polyester and Kevlar®, during construction of high-pressure hose.

LORD 7421 adhesive adheres reinforcement yarns to the extruded core, as well as adhering the extruded jacket to the reinforcement yarns. This single-component adhesive provides good hydrolytic stability and has an increased working life.

Hytrel and Kevlar are trademarks of E. I. du Pont de Nemours and Company.

Shelf Life

Shelf life is six months from date of shipment when stored in clean, dry environment at 70-80°F (21-27°C) in original, unopened container.

After opening, protect adhesive from excessive exposure to moisture by using dry nitrogen as an inert cover each time material is removed. Do not return dispensed material to its original container. The viscosity of this product will increase over time.

Features and Benefits

Identifible Appearance – easy to see on light colored substrates.

Durable – provides high elongation, modulus and tensile strength.

Convenient – requires no mixing; provides long working time with minimum waste; requires no ovens or other heat source for curing.

Environmentally Resistant – resists sunlight, weathering, humidity and salt spray.

Chemically Resistant – solvent resistant when cured. Painting and most cleaning processes do not affect bond strength.

Uncured Typical Properties*

Appearance Green-gray Liquid
Viscosity, cP @ 77°F (25°C)
Brookfield HAT
Spindle 2, 20 rpm
550 - 1550
Density, lb/gal (kg/m3) 9.75 (1168)
Solids Content by Weight, % 70
Flash Point, °F (°C)
Seta
>200 (>93)
Solvents Methylene Chloride

Cured Typical Properties*

Tensile Strength at Break, psi (MPa) 4000 (27.6)
Elongation, % 360
Young's Modulus, psi (MPa) 18,000 (124.1)
Tear Strength, pli (N/mm) 575 (100.7)
T-Peel, pli (N/mm) Hytrel 5556 = 55 - 65 (9.6 - 11.4)
Polyester Fabric = 20 - 30 (3.5 - 5.3)

*Data is typical and not to be used for specification purposes.

Auxiliary Products

LORD<sup>®</sup> 459T Adhesion Enhancer/Surface Modifier

single-component primer in toluene solvent, for direct application; for promoting adhesion of thermoplastic elastomers (TPEs), polyolefins (TPOs) and EPDM

Features and Benefits

Versatile - enhances adhesion to diffi cult-to-bond elastomers, increasing the adhesion of coatings, double-sided tape and adhesives.

Easy to Apply - low viscosity allows for easy application; no mixing required.

Convenient - requires very low dry film weights to enhance adhesion to coatings and double-sided tapes.

LORD<sup>®</sup> 459X Adhesion Enhancer/Surface Modifier

single-component primer in xylene solvent, diluted for direct application; for promoting adhesion of thermoplastic elastomers (TPEs), Polyolefins (TPOs) and EPDM; meets California's VOC requirements

Features and Benefits

Versatile - enhances adhesion to difficult-to-bond elastomers, increasing the adhesion of coatings, double-sided tape and adhesives.

Easy to Apply - low viscosity allows for easy application; no dilution necessary.

Convenient - requires very low dry film weights to enhance adhesion to coatings and double-sided tapes.

LORD<sup>®</sup> 7701 Adhesion Enhancer/Surface Modifier

single-component, solvent-based surface treatment for various vulcanized, thermoplastic polymeric materials

Features and Benefits

Versatile – functions as a cleaner and surface conditioner; treats a wide variety of elastomer functional materials.

Easy to Apply – applies easily by wipe, brush, dip or flood methods.

Convenient – requires no mixing.

Improved Adhesion – improves adhesion to cast urethanes and cured rubber.

Fast Drying – adhesion enhancer/surface modifier flashes off within five minutes or less.

Environmentally Resistant – promotes increased environmental resistance by allowing the treated surface to be more easily wet.

LORD<sup>®</sup> 7713 Adhesion Enhancer/Surface Modifier

single-component, room temperature curing primer; for adhesive bonding of glass reinforced polyester substrates

Features and Benefits

Versatile - enhances adhesion to a variety of substrates when utilized prior to most adhesive applications.

Easy to Apply - low viscosity allows for easy application; no dilution necessary.

LORD<sup>®</sup> AP-134 Adhesion Enhancer/Surface Modifier

single-component, low viscosity, reactive polymer primer; for glass and ceramics

Features and Benefits

Versatile - provides a wide range of product applications by functioning as a primer to a variety of polar substrates and as an adhesive for reaction injection molding (RIM) of polyurethane to glass.

Easy to Apply - applies easily by spray, dip or polyester felt applicator.

Convenient - requires only a single coat for most applications, reducing labor, solvent usage, inventory and shipping costs.

Literature

Download Type Name
Download MSDS (US) LORD 7421
Download Technical Data Sheet LORD 7421 Urethane Adhesive

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