VERFAHREN ZUR HERSTELLUNG VON KALTHAERTENDEN POLYURETHANHARNSTOFF-ELASTOMEREN
The present invention relates to a process for the production of polyurethane urea elastomers from (a) NCO-terminated prepolymers based on polyisocyanates and polyethers having a molecular weight of 400 to about 10,000 and an ethylene oxide content of about 10 to 60 mole-% and (b) solid diaminodiphe...
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Main Authors | , , , |
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Format | Patent |
Language | German |
Published |
06.04.1989
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Subjects | |
Online Access | Get full text |
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Abstract | The present invention relates to a process for the production of polyurethane urea elastomers from (a) NCO-terminated prepolymers based on polyisocyanates and polyethers having a molecular weight of 400 to about 10,000 and an ethylene oxide content of about 10 to 60 mole-% and (b) solid diaminodiphenyl ureas corresponding to the formula wherein R1, R2, R3 and R4 may be the same or different and represent hydrogen or C1-C6 alkyl radicals and wherein the amino groups are in the m-and/or p-position to the urea group, characterized in that the NCO prepolymers are reacted with the diaminodiphenyl ureas in powder-form in a heterogeneous phase at temperatures of about 5 DEG to 40 DEG C. The present invention is also directed to the polyurethane urea elastomers prepared by this process. |
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AbstractList | The present invention relates to a process for the production of polyurethane urea elastomers from (a) NCO-terminated prepolymers based on polyisocyanates and polyethers having a molecular weight of 400 to about 10,000 and an ethylene oxide content of about 10 to 60 mole-% and (b) solid diaminodiphenyl ureas corresponding to the formula wherein R1, R2, R3 and R4 may be the same or different and represent hydrogen or C1-C6 alkyl radicals and wherein the amino groups are in the m-and/or p-position to the urea group, characterized in that the NCO prepolymers are reacted with the diaminodiphenyl ureas in powder-form in a heterogeneous phase at temperatures of about 5 DEG to 40 DEG C. The present invention is also directed to the polyurethane urea elastomers prepared by this process. |
Author | GROEGLER,GERHARD,DR KOPP,RICHARDT,DR HESS,HEINRICH,DR RUCKES,ANDREAS,DR |
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Snippet | The present invention relates to a process for the production of polyurethane urea elastomers from (a) NCO-terminated prepolymers based on polyisocyanates and... |
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SubjectTerms | CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP |
Title | VERFAHREN ZUR HERSTELLUNG VON KALTHAERTENDEN POLYURETHANHARNSTOFF-ELASTOMEREN |
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