A closed loop recycling process of manufacturing a foam part includes dispersing a filler material recycled from an additive manufacturing (AM) process in at least one foam reactant and pouring or injecting the at least one foam reactant with the filler material into a mold and forming the foam part. The foam part has a foam matrix with between 2.5 wt. % and 30 wt. % of the filler material. The filler material can be a recycled powder from a selective laser sintering process that is not graded (i.e., sized) before being dispersed in the at least one foam reactant. For example, the recycled powder can be a recycled polyamide 12 (rPA12) powder with an average particle diameter of less than 100 micrometers. Also, the least one foam reactant can be a polyol reactant and an isocyanate reactant such that a polyurethane foam matrix with recycled rPA12 filler material is formed.

Disclosed is a polyurethane foam formulation based on conventional polyether and novolac polyols with, in particular, MDI for the production of soft-elastic PUR moulded foams with viscoelastic properties, in particular for sound insulation with foams based thereon.

Embodiments of the present disclosure are directed towards β-hydroxyphosphonate functionalized polyols and isocyanate reactive compositions that include the β-hydroxyphosphonate functionalized polyol and a base polyol.

Described herein is a method for producing a PU foam insole, including the following steps of: (1) pouring the raw materials used to form a PU foam into a mould, reacting to obtain a PU sheet, where the height of the mould cavity is from about 1.0 to about 1.6 times of the total thickness of two finished insoles; (2) splitting the PU sheet into two halves in the horizontal direction to obtain two pieces of PU insole material, where one surface of the material has open pores, and the other surface of the material has a skin; and (3) attaching a piece of fabric onto the surface having open pores of the material obtained in step (2). Also described herein is a PU foam insole produced by the method.

Rigid polyurethane foams are made using a mixture of polyols that includes 4 to 33% by weight of triisopropanolamine. The mixture of polyols is reacted with an aromatic polyisocyanate in the presence of a blowing agent, a foam-stabilizing surfactant and a urethane catalyst to produce the foam. The foams are useful as thermal insulation layers in multilayer thermal insulation assemblies such as appliance cabinets and walls for industrial and commercial freezers and refrigerators.

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.

This disclosure generally provides compositions with reduced aldehyde emissions and more specifically provides polyurethane compositions useful in means of transport such as interior part of cars, wherein the polyurethane composition comprising: (a) a polyfunctional isocyanate; (b) an isocyanate reactive composition; (c) a compound of the formula (I), (d) a primary amine containing compound; and (e) a catalyst.

The invention relates to a process for production of expanded thermoplastic elastomer, said process comprising the steps of: (e) adding monomers and/or oligomers used for producing the thermoplastic elastomer with or without further starting materials into a first stage of a polymer-processing machine, (f) mixing the monomers and/or oligomers and also the optionally added further starting materials and reacting the monomers and/or oligomers to give a polymer melt in the first stage of the polymer-processing machine, (g) passing the polymer melt into a second stage of a polymer-processing machine and adding a physical blowing agent with or without further starting materials to obtain a polymer melt comprising a blowing agent, (h) molding the polymer melt comprising a blowing agent into an expanded thermoplastic elastomer.

A method for producing a porous material includes processing a urethane resin composition containing a urethane resin (A) and a solvent (B) by a wet film forming process, in which the solvent (B) satisfies the following conditions: a difference between a Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of the urethane resin (A) (A-HSP) is in the range of 3 to 8 (J/cm.sup.3).sup.1/2 and a difference between the Hansen solubility parameter of the solvent (B) (B-HSP) and a Hansen solubility parameter of water (W-HSP) is in the range of 31.5 to 38 (J/cm.sup.3).sup.1/2. The Hansen solubility parameter of the solvent (B) preferably has a dispersion term (δD) in the range of 15.5 to 21.0 MPa.sup.0.5, a polar term (δP) in the range of 7.0 to 14.5 MPa.sup.0.5, and a hydrogen bond term (δH) in the range of 4.5 to 11.0 MPa.sup.0.5.

A hybrid material contains a matrix of polyurethane and foamed particles of thermoplastic polyurethane contained therein. A process can be used for producing such hybrid materials and these hybrid materials can be used as bicycle saddles, upholstery and shoe soles.