Hot and cold adhesives

Types of polyurethane adhesives

Purinova is a manufacturer of one-component and system adhesives, which are based on two components. One-component PU adhesives contain a pre-reacted prepolymer that self-reacts with moisture from the environment after application, while two-component adhesives require mixing the polyol component with isocyanate.

Depending on the application temperature of the product, they are divided into:

• Cold-molding adhesives (CMA),
• Hot-molding adhesives (HMA).

Cold-Molding Adhesives

With two variants available, it is possible to select an adhesive that performs better in specific conditions and situations. “Cold” adhesives are used:

• When the bonded components are not suitable for high temperatures,
• When, for other technical reasons, an alternative solution cannot be used,
• When a hot adhesive could pose a safety risk,
• In cases where there is a need to conserve energy.

Hot-Molding Adhesives

“Hot” adhesives are used when the priority is to achieve specific adhesive properties that differ from those offered by one-component adhesives. They are particularly useful in fast bonding processes, where multiple components need to be processed in a short time. Additionally, their use is justified when the material to be bonded is resistant to high temperatures.

Our hot-molding adhesives are characterized by high flexibility, short polymerization time, an ideal balance between polymerization time and flexibility, and low viscosity. In this product category, we also have the Puricat catalyst for polyurethane adhesives. Cold adhesives exhibit room temperature, while the hot version reaches temperatures from 60 to even 180°C.

Applications of Polyurethane Adhesives

Cold adhesives (CM) are used in the production of sandwich panels with mineral wool cores, for bonding rubber rolls and mats, as well as for the surfaces of sports facilities and playgrounds. Hot adhesives (HMA) are utilized in the production of surfaces in gyms, tracks, and fields, in joining wooden materials in HDF, MDF, and particle boards, in the manufacturing of rubber cushioning mats, in producing sandwich panels with PIR cores, sports accessories such as bumpers, and as a semi-finished product in many other products, for example, industrial cart wheels.

Polyurethane adhesives are particularly popular in the production of seamless surfaces made from SBR and EPDM granules, applied “in situ” as a ready-made “rubber pour.” They feature flexibility similar to the raw materials used and high resistance to bending, stretching, abrasion, and changing weather conditions, allowing them to effectively fill pores and absorb vibrations and sounds.