| 摘要 |
A liquid binder is added and uniformly distributed in production residues from polyurethane rigid foam production and/or post-consumer components based the foam. The obtained mixture is added to a tool, hardened by introducing steam, and removed. The polyurethane rigid foam has an open-cell foam density of 5-50 kg/m3, a compressive strength of 0.05-0.2 MPa, and an open-cell content of more than 50%. A liquid binder containing reactive isocyanate groups and based on a mixture and/or reaction product of aromatic and/or aliphatic polyisocyanates, and polyols, is added and uniformly distributed in production residues from polyurethane rigid foam production and/or post-consumer components based on polyurethane rigid foam. The obtained mixture is added to a tool. Steam, optionally under pressure, is introduced into the tool for the production of molded component, block or cylinder. The product is then hardened and removed from the tool. The polyurethane rigid foam has an open-cell foam density of 5-50 kg/m3 as measured by DIN 53 420, a compressive strength of 0.05-0.2 MPa as measured by DIN 53 421, and an open-cell content of more than 50% as measured by DIN ISO 4590-86. |
