Patent EP-4284849-A2 (EP)
Inventor: PISZCZYK UKASZ
IPC: C08G18/10
Filed: 2022-01-25
Abstract: The invention relates to a method for producing a solid polyurethane composite containing biomass and a solid polyurethane composite produced by said method and a method of producing a foamed polyurethane composite containing biomass and a foamed polyurethane composite produced by said method. A method for producing a solid polyurethane composite containing biomass according to the invention, formed with a polyurethane layer prepared from oligomers, polyisocyanates, extenders, catalysts. The production method is characterised in that a layer of biomass-containing polyurethane is applied onto a support, wherein the applied layer of biomass-containing polyurethane has a thickness of 50 μm to 300 μm, then this is dried in a drying chamber at a temperature of up to 80 °C to 150 °C for 1 to 180 min, and another layer of biomass-containing polyurethane with a thickness of 300 to 1500 μm is applied onto the dried layer of biomass-containing polyurethane onto which a surface material is applied, and then this is rolled on rolls, followed by baking in a baking chamber at a temperature of 80 °C to 150 °C for 1 to 180 minutes, after which the support is separated; A solid polyurethane composite containing biomass obtained using the method according to the invention and formed with polyurethane layers. The solid composite is characterised in that the polyurethane layers (29,30) are stacked one on another and have a thickness of 50 to 1500 μm, wherein each polyurethane layer (29,30) as polyols contains bio-polyols of plant origin with a molecular weight of 100 to 6000 g/mol, a functionality of 1 to 4 and a hydroxyl number from 30 to 600 mg KOH/g, and one surface of the combined polyurethane layers (29,30) is coated with a surface material (20), while one of the polyurethane layers (29,30) contains 1 to 90% citrus fruit biomass in crushed form. A method for producing a foamed polyurethane composite containing biomass according to the invention formed with a layer of polyurethane prepared from oligomers, polyisocyanates, extenders, catalysts The production method is characterised in that a layer of biomass-containing polyurethane is applied onto a support, wherein the applied layer of biomass-containing polyurethane has a thickness of 50 μm to 450 μm, followed by foaming in a foaming chamber and drying in a drying chamber at a temperature of up to 80 °C to 100 °C for 20 to 180 mins, and another layer of biomass-containing polyurethane with a thickness of 300 μm to 1500 μm is applied onto the dried layer of biomass-containing polyurethane onto which a surface material is applied, and then this is rolled on rolls, followed by baking in a baking chamber at a temperature of 80 °C to 150 °C for 1 to 180 minutes, after which the support is separated. A foamed polyurethane composite containing biomass obtained using the method according to the invention and formed with polyurethane layers. The foam polyurethane composite containing biomass is characterised in that the polyurethane layers (29, 30) are stacked one on another and have a thickness of 50 μm to 3500 μm, wherein the first polyurethane layer (29) is foamed, and each polyurethane layer (29, 30) as polyols contains bio-polyols of plant origin with a molecular weight of 100 to 6000 g/mol, a functionality of 1 to 4 and a hydroxyl number from 30 to 600 mg KOH/g, and one surface of the combined polyurethane layers (29, 30) is coated with a surface material (20), while one of the polyurethane layers (29, 30) contains 1 to 90% citrus fruit biomass in crushed form.