Abstract:
The object of the invention is a method for producing composite bodies, which comprise at least one cover layer b) and a hard foam based on isocyanate a), wherein said cover layer b) is moved continuously and the starting material for said hard foam based on isocyanate a) is applied to said cover layer b), characterized in that the application of the liquid starting material for the hard foam based on isocyanate a) is performed using at least one fixed tube c), which is attached parallel to the cover layer plane and perpendicular to the movement direction to the cover layer b) and is provided with openings f).
Abstract:
The invention relates to a method for producing composite bodies consisting of at least one covering layer a) and a rigid foamed material based on isocyanate b), the covering layer a) being continuously moved and the starting material for the rigid foamed material based on isocyanate b) being applied to the covering layer. The invention is characterised in that the application of the liquid starting material for the rigid foamed material based on isocyanate b) is carried out by means of a fixed tube provided with boreholes and oriented towards the covering layer in such a way that it is parallel and at a right angle to the direction of movement.
Abstract:
Método para producir elementos compuestos, que se componen al menos de una capa de cobertura a) y una espuma rígida a base de isocianato b), en la cual la capa de cobertura a) se mueve continuamente y el material de inicio para la espuma rígida a base de isocianato b) se aplica sobre la capa de cobertura, en cuyo caso la descarga del material de inicio líquido para la espuma rígida a base de isocianato b) se efectúa por medio de un tubo provisto de orificios, parado fijo, dispuesto en paralelo y en ángulo recto a la dirección de movimiento de la capa de cobertura a), caracterizado porque el material de inicio para la espuma rígida a base de isocianato b) se abastece en el centro del tubo provisto de orificios y porque el diámetro del tubo provisto de orificios se disminuye desde el centro hacia los bordes del tubo.
Abstract:
The invention relates to a method for producing polyurethane rigid foams by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms that are reactive with isocyanate groups in the presence of c) expanding agents, characterized in that the compounds having at least two hydrogen atoms that are reactive with isocyanate groups contain b) at least one aromatic polyester alcohol bi), at least one polyester alcohol bii) having a functionality of 4 to 8 and a hydroxyl number ranging between 300 and 600 mgKOH/gh.
Abstract:
The object of the invention is a method for producing composite bodies, which comprise at least one cover layer b) and a hard foam based on isocyanate a), wherein said cover layer b) is moved continuously and the starting material for said hard foam based on isocyanate a) is applied to said cover layer b), characterized in that the application of the liquid starting material for the hard foam based on isocyanate a) is performed using at least one fixed tube c), which is attached parallel to the cover layer plane and perpendicular to the movement direction to the cover layer b) and is provided with openings f).
Abstract:
The invention relates to a method for producing polyurethane rigid foams by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms that are reactive with isocyanate groups in the presence of c) expanding agents, characterized in that the compounds having at least two hydrogen atoms that are reactive with isocyanate groups contain b) at least one aromatic polyester alcohol bi), at least one polyester alcohol bii) having a functionality of 4 to 8 and a hydroxyl number ranging between 300 and 600 mgKOH/gh.