摘要:
The invention relates to a method for producing polyurethane hard foams by reacting: A) one or more organic polyisocyanates; B) one or more polyester polyols; C) optionally one or more polyether polyols; D) a fire retardant mixture; E) additional auxiliary agents or additives; F) one or more propellants; and G) catalysts, characterized in that the fire retardant mixture D) contains d1) 10 to 90 wt%, relative to the quantity of the fire retardant mixture, of a fire retardant with a boiling point less than or equal to 220°C, and d2) 10 to 90 wt%, relative to the quantity of the fire retardant mixture, of a phosphorus-containing fire retardant with a boiling point above 220°C, this sum of components d1 ) and d2) yielding 100 wt%.
摘要:
The invention relates to a method for producing composite bodies consisting of at least one covering layer (4) and a rigid foamed material (5) based on isocyanate, the covering layer (4) being continuously moved and the starting material for the rigid foamed material (5) based on isocyanate being applied to the covering layer (4). The invention is characterised in that the application of the liquid starting material for the rigid foamed material (5) based on isocyanate is carried out by means of a fixed tube (3) provided with boreholes and oriented towards the covering layer (4) in such a way that it is parallel and at a right angle to the direction of movement.
摘要:
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.
摘要:
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).
摘要:
A process is proposed for production of composite elements (12) having at least one outer layer (14) and an isocyanate-based rigid foam (16). The outer layer (14) is moved continuously, and liquid starting material for the isocyanate-based rigid foam (16) is applied to the outer layer (14). The liquid starting material for the isocyanate-based rigid foam (16) is applied by means of at least one fixed tube (18) provided with openings (20). The liquid starting material comprises at least one compound that reacts with isocyanate groups to form urethane, and a polyisocyanate and a blowing agent. The blowing agent has a boiling point of +15°C to +250°C at atmospheric pressure. The compound that reacts with isocyanate groups to form urethane or the polyisocyanate is laden with at least one fluid having a boiling point lower than +15°C at atmospheric pressure under a pressure above atmospheric pressure.
摘要:
The invention relates to a facade for a building, constructed from composite elements (1), wherein the composite elements (1) each have an inner covering layer (3), a polymer foam layer as a core (7), and an outer metallic covering layer (5), and are fastened to a supporting structure (21). Each composite element (1) has at least two fastening regions (37), wherein, in one fastening region (37), the composite elements (1) are connected immovably to the supporting structure (21) and, in the other fastening regions (37), the composite elements (1) are connected displaceably to the supporting structure (21), or wherein the composite elements (1) rest with the side facing the ground on a holder and, in all of the fastening regions (37), are connected displaceably to the supporting structure (21).