Energy savings plus mechanical reinforcement and rheology control

Solvent Based Two Component Polyurethane Adhesive

Adhesives Formulation

Applicable Type

Solvent borne Adhesives

Applicable Base Polymer

Isocyanates

Applicable Industrial Sectors

Automotive , Buildings & constructions , Industrial Assembly , Transportation (excl. Automotive)

Applicable Base Polymer Properties

Polyurethanes are extensively and successfully used as adhesives and sealants, and they have an excellent record of durability. Polyurethane-based adhesives form tough bonds with high peel strength. They have better low temperature strength than other adhesives. They have exceptionally high strength at cryogenic temperatures. They have good chemical resistance, although not generally as good as epoxies or acrylics. Urethanes do not have high temperature resistance. Maximum upper use limits are about 150°C, and most formulations are used below 100°C.

Typical Formulation Ingredients

Ingredient

Parts by weight

Polyester polyol (5% hydroxyl content)

polyisocyanate (reaction product of toluene diisocyanate and polyols ; NCO content 13%)

Ethyl Acetate

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Processing

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Resulting Properties

The formulation above is for a two component polyurethane adhesive with a long pot life. This type of adhesive is often used for laminating flexible substrates. Often additives are not required to provide flexibility or toughness. Polyurethanes have the capability of providing these properties through manipulation of the resulting molecule by proper choice of isocyanate and polyol. However, additives are used mainly to stabilize the adhesive relative to moisture, oxidation, UV, etc.

Tips and Tricks

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