TWO-COMPONENT POLYURETHANE COMPOSITION WITH DELAYED CROSSLINKING

• Main Authors: JUETTNER, WERNER, THIELE, LOTHAR, OKAMATO, OLIVER-KEI
• Format: Patent
• Language: English; French; German
• Published: 26.07.2012
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUTORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTINGOF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NAILING OR STAPLING MACHINES IN GENERAL; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; POLISHES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL

Vernetzende 2-Komponenten-Polyurethanzusammensetzung bestehend aus (i) einer Komponente A enthaltend Polyole, Additive, (ii) einer Komponente B enthaltend 100 bis 65 Gew.% aromatische Polyisocyanate, 0 bis 35 Gew.% aliphatische Polyisocyanate und 0,05 bis 3,0 Gew.% Verzögerer, sowie gegebenenfalls Additive, wobei die gemischte Zusammensetzung eine Viskosität (EN ISO 2555) von 00 mPas bis 3000 mPas aufweist bei 25 °C, und die vernetzte Zusammensetzung eine Glasübergangstemperatur (Tg) über 50°C aufweist und eine Topfzeit über 60 min. Die 2K-PU-Zusammensetzung ist als Klebstoff und Matrixwerkstoff für Composit-Materialien geeignet. The invention relates to a crosslinking two-component polyurethane composition consisting of (i) a constituent A containing polyols and additives, and (ii) a constituent B containing between 100 and 65 wt. % of aromatic polyisocyanates, between 0 and 35 wt. % of aliphatic polyisocyanates, and between 0.05 and 3.0 wt. % of a retarder, and optionally additives, the mixed composition having a viscosity (EN ISO 2555) of between 100 mPas and 3000 mPas at 25°C, and the crosslinked composition having a glass transition temperature (Tg) of higher than 50°C and a pot life of longer than 60 minutes. The two-component polyurethane composition is suitable as an adhesive and as a matrix substance for composite materials. La présente invention concerne une composition de polyuréthane à 2 composants réticulante composée de (i) un composant A contenant des polyols, des additifs et de (ii) un composant B contenant de 100 à 65% en poids de polyisocyanates aromatiques, de 0 à 35% en poids de polyisocyanates aliphatiques et de 0,05 à 3,0% en poids de retardateur, ainsi qu'éventuellement des additifs, la composition mélangée présentant une viscosité (EN ISO 2555) de 100 mPas à 3000 mPas à 25°C, et la composition réticulée présentant une température de transition vitreuse (Tg) supérieure à 50°C et une durée de vie en pot supérieure à 60 min. Ladite composition de polyuréthane à 2 composants convient en tant qu'adhésif et matière matricielle pour des matériaux composites.