Process for producing cylindrical mouldings based on cellular polyurethane elastomers

• Main Authors: JACKISCH PETER, HANSEN RALF, MARTEN ELKE
• Format: Patent
• Language: Chinese; English
• Published: 19.12.2012
• Subjects: BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SHOCK-ABSORBERS; SPRINGS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; WEAPONS

Preparation of cylindrical molded bodies (I) based on cellular polyurethane elastomers with determined density, tensile strength, elongation and a tear resistance, comprises reaction of prepolymers (i) with cross linking components (ii) in a molded form, where (i) are isocyanate groups based on methylenediphenyldiisocyanate and polyetherdiol; and (ii) contains polyetheralcohol with a nominal functionality of 2-3; diol with a molecular weight of 62-499 g/mol; water; and catalysts. Preparation of cylindrical molded bodies (I) based on cellular polyurethane elastomers with a density of 350-900 kg/m 3> according to DIN EN ISO 1798, a tensile strength of >= 2 N/mm 2> according to DIN EN ISO 1798, elongation of >= 200% according to DIN EN ISO 1798 and a tear resistance of >= 8 N/mm according to DIN ISO 34-1 B, comprises reaction of prepolymers (i) with cross linking components (ii) in a molded form, where (i) are isocyanate groups based on methylenediphenyldiisocyanate and polyetherdiol with a molecular weight of 1