Polyurethane glue: properties, tips for use, what can you stick with?

Whether used in the production of furniture, interior decoration or the production of building elements: Due to ever higher quality requirements, bonding with high-quality polyurethane adhesives is increasingly popular.

What is a polyurethane glue?

Polyurethane glue belongs to the group of reactive glues or adhesives. The components of the reaction are isocyanates (resin components) and polyols (hardeners). In use, the components react to form polyurethane.

Polyurethane adhesives consist of isocyanates and polyols and have recurring urethane → polyurethane units. Through chemical modifications, the consistency of the components can be designed so that as a rule relatively few solvents are required. Polyurethane adhesives can be modified in a targeted manner with the aid of auxiliary materials and additives. Fillers are used to regulate their viscosity.

Polyurethane glue: properties

Polyurethane adhesives are chemically hardened, cold hardened and are commercially available as one and two-component systems. With one-component systems, the isocyanate complex reacts and hardens with moisture after opening the container. With the two-component system, the adhesive reacts and hardens after mixing. By selecting the resin component (long, elastic or short, hard polyols) and the number of molecule connection points, the properties of polyurethane adhesives can be adjusted from soft elastic to very hard.

Polyurethane glue: tips for use

Polyurethane adhesives are supplied as two-component systems in two separate containers, which are mixed together during processing. As one-component systems, polyurethane adhesives are supplied in a single container. Using polyurethane glue can irritate your eyes, all respiratory organs and skin the entire time you handle it and can trigger an allergic reaction if inhaled. In sensitive people, exposure to very low concentrations may cause allergic reactions. As an alternative to polyurethane adhesives, the use of solvent-free or low-solvent dispersion adhesives should first be considered. These are easier to treat and present less ecological risks. The use of polyurethane glue is generally justified for technical reasons. When planning and choosing a floor covering, think carefully about the glue you will need. It must therefore be included in the decision you make.

Polyurethane glue: what can you stick with?

Polyurethane adhesives are gaining in importance in the field of adhesives for flooring. Polyurethane adhesives are also used during the preparation of the support. The advantage of polyurethane resins is their processability, strength and elasticity, which can be adjusted almost at will. This is why they are mainly used indoors as one and two-component polyurethane adhesives. Almost all textile and elastomeric floor coverings can be glued with polyurethane glues. These are not suitable for cork, coconut or sisal coverings.

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