The present invention provides a composition which is capable of forming a polyurethane foam having a high hardness and excellent sound absorption properties. [Solution] The present invention relates to a composition for forming polyurethane foam characterized in that the composition for forming polyurethane foam comprises a polyol, a polyisocyanate, and a catalyst, in which the polyol comprises a polyol (A) having a number average molecular weight of 1500 to 8000 g/mol, the catalyst comprises a trimerization catalyst, in which the polyurethane foam has an air permeability of not less than 0.1 L/sec.

A thermoplastic polyurethane (TPU) foam product with high flatness, and a preparation method and a use thereof are provided. The TPU foam product is prepared by processing aliphatic thermoplastic polyurethane (ATPU) beads with a melting range of 20° C. to 50° C. and a melting point of 90° C. to 160° C. by a physical gas foaming process to obtain foamed ATPU beads and heating the foamed ATPU beads with a heat source to make the foamed ATPU beads fused. The TPU foam product with high flatness has a density of 0.08 g/cm.sup.3 to 0.8 g/cm.sup.3 and a flatness value of less than 2 mm, and the flatness value is determined by a fixed-length ruler. The TPU foam product not only has high flatness such that diversified designs are allowed for a surface of the product, but also has high resilience.

The subject application relates to polyurethane foam and methods of forming the same. A polyurethane foam may include a polyurethane foam may include a first polyol component, a second polyol component, and a third polyol component. The first polyol component may include at least one component selected from the group of a polyether polyol and a polyester polyol. The second polyol component may include a polyether polyol. The third polyol component may include a grafted polyether polyol. The polyurethane foam may have a density of at least about 100 kg/m.sup.3 and not greater than about 800 kg/m.sup.3. The polyurethane foam may have an adjusted compression force deflection to density ratio of at least about 0.3.

The present invention relates to foam. In particular, the present invention relates to profiled foams and processes for profiling absorbent foam products. More particularly, the present invention relates to processes for producing a profiled absorbent polyurethane foam product, comprising the steps of foaming, curing, profiling and drying, wherein profiling occurs before drying; and absorbent aliphatic polyurethane foam products having at least one profiled surface.

A foam-forming composition for producing a rigid polyurethane foam including: (a) at least one isocyanate component; and (b) at least one isocyanate-reactive composition including: (bi) a rigid polyol compound; and (bii) a flexible polyol compound; (c) a catalyst package including at least one latent gelling catalyst; and (d) at least one blowing agent.

One or more embodiments of the present invention provides a process for the preparation of a coating or layer on a substrate, in which process a mixture comprising one or more polyurethane dispersions, one or more flame retardants, which can be halogen-based or halogen-free, one or more foam stabilizers and optionally one or more crosslinkers is mechanically foamed and then applied on a substrate as a foam, optionally followed by adding flocking fibres, and subsequently dried, wherein the foam has flame retardant properties and remains present as a stable pressure resistant dried foam.

A polyurethane foam may include an isocyanate polymer component and a polyol component. The polyol component may include a polyol having a molecular weight of at least about 500 kg/mol and not greater than about 6000 kg/mol. The polyurethane foam may have an elongation of at least about 500%. The polyurethane foam may further have a density of at least about 250 g/L and a tensile strength of not greater than about 1000 kPa.

A reactive mixture and method for making a thermoplastic polyurethane (TPU) flexible foam having a predominantly open-cell structure (open-cell content of ≥50% by volume calculated on the total volume of the foam and measured according to ASTM D6226-10) and an apparent density below 200 kg/m.sup.3.

The invention pertains generally to a shelf-stable polyurethane HFO-blown two-component polyurethane foam composition which includes controlling the ratio of tin-containing catalyst(s) to potassium-containing catalyst(s).

A biodegradable foam which includes a poly-ester-based polyurethane foam and a mixture comprised of a soil-dwelling carbon-digesting bacteria embedded in a carrier compound. The mixture of the soil-dwelling carbon-digesting bacteria is homogenously dispersed throughout the polyester-based polyurethane foam. This biodegradable foam exhibits biodegradation rates higher than a polyester-based polyurethane foam absent the soil-dwelling carbon-digesting bacteria.