ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA
LA PRESENTE INVENCION, SE RELACIONA CON ELASTOMEROS MOLDEADOS DE POLIURETANO/UREA, Y ESPECIFICAMENTE CON ELASTOMEROS DE POLIURETANO/UREA MEJORADOS, CON GRAN ESTABILIDAD A ALTAS TEMPERATURAS, HASTA APROX. 140-150 C, Y FLEXIBILIDAD A BAJAS TEMPERATURAS, HASTA APROX. -35-(-40) C, PARA UTILIZACION EN AP...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Patent |
| Sprache: | spa |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | WU, WILLIAM, W., L STAMP, JAMES, R BROTHERS, JOE |
| description | LA PRESENTE INVENCION, SE RELACIONA CON ELASTOMEROS MOLDEADOS DE POLIURETANO/UREA, Y ESPECIFICAMENTE CON ELASTOMEROS DE POLIURETANO/UREA MEJORADOS, CON GRAN ESTABILIDAD A ALTAS TEMPERATURAS, HASTA APROX. 140-150 C, Y FLEXIBILIDAD A BAJAS TEMPERATURAS, HASTA APROX. -35-(-40) C, PARA UTILIZACION EN APLICACIONES DINAMICAS. DICHOS ELASTOMEROS, SON PARTICULARMENTE UTILES PARA SU APLICACION EN CINTURONES, ESPECIFICAMENTE EN CINTURONES SINCRONOS, CINTURONES-V, MULTI-V CON RESALTES O MICRORESALTES, CINTURONES PLANOS, O SIMILARES. LOS ELASTOMEROS DE POLIURETANO/UREA DE LA PRESENTE INVENCION, SE PREPARAN HACIENDO REACCIONAR PREPOLIMEROS DE POLIISOCIANATO CON ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS, MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y ALARGADORES DE CADENA DE DIAMINAS SECUNDARIAS AROMATICAS, O MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y POLIOLES NO OXIDATIVOS, QUE SE ELIGEN TODOS PARA ELIMINAR LA NECESIDAD DE CATALIZADORES VIA PROCEDIMIENTOS DE MOLDEO ESTANDAR, Y PARA MEJORAR LA SEPARACION DE FASES. LOS PREPOLIMEROS DE POLIISOCIANATO SON PRODUCTOS DE REACCION DE POLIOLES, QUE SON NO OXIDATIVOS A ELEVADAS TEMPERATURAS, POR EJEMPLO POLIOLES DE POLICARBONATO, POLIOLES DE POLIESTER, O MEZCLAS DE LOS MISMOS, CON POLIISOCIANATOS ORGANICOS, QUE SON, BIEN COMPACTOS, SIMETRICOS O AROMETICOS, COMO POR EJEMPLO DIISOCIANATO DE PARA-FENILENO, DIISOCIANATO DE 1,5-NAFTALENO, Y DIISOCIANATO DE 2,6-TOLUENO, O SON ALIFATICOS Y TIENEN UNA ESTRUCTURA TRANS O TRANS,TRANS, COMO EL DIISOCIANATO DE TRANS1,4-CICLOHEXANO Y EL DIISOCIANATO DE TRANS,TRANSDICICLOHEXILMETILO.
The present invention relates to molded polyurethane/urea elastomers, and specifically to improved polyurethane/urea elastomers having high temperature stability to about 140-150° C. and low temperature flexibility at about -35-(-40)° C., for use in dynamic applications. These elastomers are particularly useful for application in belts, specifically in automotive timing or synchronous belts, V-belts, multi V-ribbed or micro-ribbed belts, flat belting and the like. The polyurethane/urea elastomers of the present invention are prepared by reacting polyisocyanate prepolymers with symmetric primary diamine chain extenders, mixtures of symmetric primary diamine chain extenders and secondary diamine chain extenders, or mixtures of symmetric primary diamine chain extenders and non-oxidative polyols, which are all chosen to elimin |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_ES2164773TT3</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>ES2164773TT3</sourcerecordid><originalsourceid>FETCH-epo_espacenet_ES2164773TT33</originalsourceid><addsrcrecordid>eNrjZDB29XEMDvH3dQ3yD1ZwcVUI8PfxDA1yDXH089cH0o4gMUefEEeFEFffANcgx5DQIEceBta0xJziVF4ozc2g6OYa4uyhm1qQH59aXJCYnJqXWhLvGmxkaGZibm4cEmJsTIwaALmMJ7I</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA</title><source>esp@cenet</source><creator>WU, WILLIAM, W., L ; STAMP, JAMES, R ; BROTHERS, JOE</creator><creatorcontrib>WU, WILLIAM, W., L ; STAMP, JAMES, R ; BROTHERS, JOE</creatorcontrib><description>LA PRESENTE INVENCION, SE RELACIONA CON ELASTOMEROS MOLDEADOS DE POLIURETANO/UREA, Y ESPECIFICAMENTE CON ELASTOMEROS DE POLIURETANO/UREA MEJORADOS, CON GRAN ESTABILIDAD A ALTAS TEMPERATURAS, HASTA APROX. 140-150 C, Y FLEXIBILIDAD A BAJAS TEMPERATURAS, HASTA APROX. -35-(-40) C, PARA UTILIZACION EN APLICACIONES DINAMICAS. DICHOS ELASTOMEROS, SON PARTICULARMENTE UTILES PARA SU APLICACION EN CINTURONES, ESPECIFICAMENTE EN CINTURONES SINCRONOS, CINTURONES-V, MULTI-V CON RESALTES O MICRORESALTES, CINTURONES PLANOS, O SIMILARES. LOS ELASTOMEROS DE POLIURETANO/UREA DE LA PRESENTE INVENCION, SE PREPARAN HACIENDO REACCIONAR PREPOLIMEROS DE POLIISOCIANATO CON ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS, MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y ALARGADORES DE CADENA DE DIAMINAS SECUNDARIAS AROMATICAS, O MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y POLIOLES NO OXIDATIVOS, QUE SE ELIGEN TODOS PARA ELIMINAR LA NECESIDAD DE CATALIZADORES VIA PROCEDIMIENTOS DE MOLDEO ESTANDAR, Y PARA MEJORAR LA SEPARACION DE FASES. LOS PREPOLIMEROS DE POLIISOCIANATO SON PRODUCTOS DE REACCION DE POLIOLES, QUE SON NO OXIDATIVOS A ELEVADAS TEMPERATURAS, POR EJEMPLO POLIOLES DE POLICARBONATO, POLIOLES DE POLIESTER, O MEZCLAS DE LOS MISMOS, CON POLIISOCIANATOS ORGANICOS, QUE SON, BIEN COMPACTOS, SIMETRICOS O AROMETICOS, COMO POR EJEMPLO DIISOCIANATO DE PARA-FENILENO, DIISOCIANATO DE 1,5-NAFTALENO, Y DIISOCIANATO DE 2,6-TOLUENO, O SON ALIFATICOS Y TIENEN UNA ESTRUCTURA TRANS O TRANS,TRANS, COMO EL DIISOCIANATO DE TRANS1,4-CICLOHEXANO Y EL DIISOCIANATO DE TRANS,TRANSDICICLOHEXILMETILO.
The present invention relates to molded polyurethane/urea elastomers, and specifically to improved polyurethane/urea elastomers having high temperature stability to about 140-150° C. and low temperature flexibility at about -35-(-40)° C., for use in dynamic applications. These elastomers are particularly useful for application in belts, specifically in automotive timing or synchronous belts, V-belts, multi V-ribbed or micro-ribbed belts, flat belting and the like. The polyurethane/urea elastomers of the present invention are prepared by reacting polyisocyanate prepolymers with symmetric primary diamine chain extenders, mixtures of symmetric primary diamine chain extenders and secondary diamine chain extenders, or mixtures of symmetric primary diamine chain extenders and non-oxidative polyols, which are all chosen to eliminate the need for catalysts via standard molding processes, and to improve phase separation. The polyisocyanate prepolymers are reaction products of polyols which are nonoxidative at high temperatures, such as polycarbonate polyols, polyester polyols, or mixtures thereof, with organic polyisocyanates which are either compact, symmetric and aromatic, such as para-phenylene diisocyanate, 1,5-naphthalene diisocyanate, and 2,6-toluene diisocyanate, or are aliphatic and possess trans or trans,trans geometric structure, such as trans-1,4-cyclohexane diisocyanate and trans,trans-4,4'-dicyclohexylmethyl diisocyanate.</description><edition>7</edition><language>spa</language><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ; BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES ; BLASTING ; CHAINS ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; ENGINEERING ELEMENTS AND UNITS ; FITTINGS PREDOMINANTLY USED THEREFOR ; 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 ; MECHANICAL ENGINEERING ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; PERFORMING OPERATIONS ; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE ; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR ; SHAPING OR JOINING OF PLASTICS ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; THERMAL INSULATION IN GENERAL ; TRANSPORTING ; WEAPONS ; WORKING OF PLASTICS ; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020301&DB=EPODOC&CC=ES&NR=2164773T3$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020301&DB=EPODOC&CC=ES&NR=2164773T3$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WU, WILLIAM, W., L</creatorcontrib><creatorcontrib>STAMP, JAMES, R</creatorcontrib><creatorcontrib>BROTHERS, JOE</creatorcontrib><title>ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA</title><description>LA PRESENTE INVENCION, SE RELACIONA CON ELASTOMEROS MOLDEADOS DE POLIURETANO/UREA, Y ESPECIFICAMENTE CON ELASTOMEROS DE POLIURETANO/UREA MEJORADOS, CON GRAN ESTABILIDAD A ALTAS TEMPERATURAS, HASTA APROX. 140-150 C, Y FLEXIBILIDAD A BAJAS TEMPERATURAS, HASTA APROX. -35-(-40) C, PARA UTILIZACION EN APLICACIONES DINAMICAS. DICHOS ELASTOMEROS, SON PARTICULARMENTE UTILES PARA SU APLICACION EN CINTURONES, ESPECIFICAMENTE EN CINTURONES SINCRONOS, CINTURONES-V, MULTI-V CON RESALTES O MICRORESALTES, CINTURONES PLANOS, O SIMILARES. LOS ELASTOMEROS DE POLIURETANO/UREA DE LA PRESENTE INVENCION, SE PREPARAN HACIENDO REACCIONAR PREPOLIMEROS DE POLIISOCIANATO CON ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS, MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y ALARGADORES DE CADENA DE DIAMINAS SECUNDARIAS AROMATICAS, O MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y POLIOLES NO OXIDATIVOS, QUE SE ELIGEN TODOS PARA ELIMINAR LA NECESIDAD DE CATALIZADORES VIA PROCEDIMIENTOS DE MOLDEO ESTANDAR, Y PARA MEJORAR LA SEPARACION DE FASES. LOS PREPOLIMEROS DE POLIISOCIANATO SON PRODUCTOS DE REACCION DE POLIOLES, QUE SON NO OXIDATIVOS A ELEVADAS TEMPERATURAS, POR EJEMPLO POLIOLES DE POLICARBONATO, POLIOLES DE POLIESTER, O MEZCLAS DE LOS MISMOS, CON POLIISOCIANATOS ORGANICOS, QUE SON, BIEN COMPACTOS, SIMETRICOS O AROMETICOS, COMO POR EJEMPLO DIISOCIANATO DE PARA-FENILENO, DIISOCIANATO DE 1,5-NAFTALENO, Y DIISOCIANATO DE 2,6-TOLUENO, O SON ALIFATICOS Y TIENEN UNA ESTRUCTURA TRANS O TRANS,TRANS, COMO EL DIISOCIANATO DE TRANS1,4-CICLOHEXANO Y EL DIISOCIANATO DE TRANS,TRANSDICICLOHEXILMETILO.
The present invention relates to molded polyurethane/urea elastomers, and specifically to improved polyurethane/urea elastomers having high temperature stability to about 140-150° C. and low temperature flexibility at about -35-(-40)° C., for use in dynamic applications. These elastomers are particularly useful for application in belts, specifically in automotive timing or synchronous belts, V-belts, multi V-ribbed or micro-ribbed belts, flat belting and the like. The polyurethane/urea elastomers of the present invention are prepared by reacting polyisocyanate prepolymers with symmetric primary diamine chain extenders, mixtures of symmetric primary diamine chain extenders and secondary diamine chain extenders, or mixtures of symmetric primary diamine chain extenders and non-oxidative polyols, which are all chosen to eliminate the need for catalysts via standard molding processes, and to improve phase separation. The polyisocyanate prepolymers are reaction products of polyols which are nonoxidative at high temperatures, such as polycarbonate polyols, polyester polyols, or mixtures thereof, with organic polyisocyanates which are either compact, symmetric and aromatic, such as para-phenylene diisocyanate, 1,5-naphthalene diisocyanate, and 2,6-toluene diisocyanate, or are aliphatic and possess trans or trans,trans geometric structure, such as trans-1,4-cyclohexane diisocyanate and trans,trans-4,4'-dicyclohexylmethyl diisocyanate.</description><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</subject><subject>BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES</subject><subject>BLASTING</subject><subject>CHAINS</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>FITTINGS PREDOMINANTLY USED THEREFOR</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</subject><subject>MECHANICAL ENGINEERING</subject><subject>METALLURGY</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>PERFORMING OPERATIONS</subject><subject>PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE</subject><subject>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</subject><subject>SHAPING OR JOINING OF PLASTICS</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>TRANSPORTING</subject><subject>WEAPONS</subject><subject>WORKING OF PLASTICS</subject><subject>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2002</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDB29XEMDvH3dQ3yD1ZwcVUI8PfxDA1yDXH089cH0o4gMUefEEeFEFffANcgx5DQIEceBta0xJziVF4ozc2g6OYa4uyhm1qQH59aXJCYnJqXWhLvGmxkaGZibm4cEmJsTIwaALmMJ7I</recordid><startdate>20020301</startdate><enddate>20020301</enddate><creator>WU, WILLIAM, W., L</creator><creator>STAMP, JAMES, R</creator><creator>BROTHERS, JOE</creator><scope>EVB</scope></search><sort><creationdate>20020301</creationdate><title>ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA</title><author>WU, WILLIAM, W., L ; STAMP, JAMES, R ; BROTHERS, JOE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_ES2164773TT33</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>spa</language><creationdate>2002</creationdate><topic>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</topic><topic>BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES</topic><topic>BLASTING</topic><topic>CHAINS</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>FITTINGS PREDOMINANTLY USED THEREFOR</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>MECHANICAL ENGINEERING</topic><topic>METALLURGY</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>PERFORMING OPERATIONS</topic><topic>PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE</topic><topic>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</topic><topic>SHAPING OR JOINING OF PLASTICS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>TRANSPORTING</topic><topic>WEAPONS</topic><topic>WORKING OF PLASTICS</topic><topic>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</topic><toplevel>online_resources</toplevel><creatorcontrib>WU, WILLIAM, W., L</creatorcontrib><creatorcontrib>STAMP, JAMES, R</creatorcontrib><creatorcontrib>BROTHERS, JOE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>WU, WILLIAM, W., L</au><au>STAMP, JAMES, R</au><au>BROTHERS, JOE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA</title><date>2002-03-01</date><risdate>2002</risdate><abstract>LA PRESENTE INVENCION, SE RELACIONA CON ELASTOMEROS MOLDEADOS DE POLIURETANO/UREA, Y ESPECIFICAMENTE CON ELASTOMEROS DE POLIURETANO/UREA MEJORADOS, CON GRAN ESTABILIDAD A ALTAS TEMPERATURAS, HASTA APROX. 140-150 C, Y FLEXIBILIDAD A BAJAS TEMPERATURAS, HASTA APROX. -35-(-40) C, PARA UTILIZACION EN APLICACIONES DINAMICAS. DICHOS ELASTOMEROS, SON PARTICULARMENTE UTILES PARA SU APLICACION EN CINTURONES, ESPECIFICAMENTE EN CINTURONES SINCRONOS, CINTURONES-V, MULTI-V CON RESALTES O MICRORESALTES, CINTURONES PLANOS, O SIMILARES. LOS ELASTOMEROS DE POLIURETANO/UREA DE LA PRESENTE INVENCION, SE PREPARAN HACIENDO REACCIONAR PREPOLIMEROS DE POLIISOCIANATO CON ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS, MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y ALARGADORES DE CADENA DE DIAMINAS SECUNDARIAS AROMATICAS, O MEZCLAS DE ALARGADORES DE CADENA DE DIAMINAS PRIMARIAS AROMATICAS SIMETRICAS Y POLIOLES NO OXIDATIVOS, QUE SE ELIGEN TODOS PARA ELIMINAR LA NECESIDAD DE CATALIZADORES VIA PROCEDIMIENTOS DE MOLDEO ESTANDAR, Y PARA MEJORAR LA SEPARACION DE FASES. LOS PREPOLIMEROS DE POLIISOCIANATO SON PRODUCTOS DE REACCION DE POLIOLES, QUE SON NO OXIDATIVOS A ELEVADAS TEMPERATURAS, POR EJEMPLO POLIOLES DE POLICARBONATO, POLIOLES DE POLIESTER, O MEZCLAS DE LOS MISMOS, CON POLIISOCIANATOS ORGANICOS, QUE SON, BIEN COMPACTOS, SIMETRICOS O AROMETICOS, COMO POR EJEMPLO DIISOCIANATO DE PARA-FENILENO, DIISOCIANATO DE 1,5-NAFTALENO, Y DIISOCIANATO DE 2,6-TOLUENO, O SON ALIFATICOS Y TIENEN UNA ESTRUCTURA TRANS O TRANS,TRANS, COMO EL DIISOCIANATO DE TRANS1,4-CICLOHEXANO Y EL DIISOCIANATO DE TRANS,TRANSDICICLOHEXILMETILO.
The present invention relates to molded polyurethane/urea elastomers, and specifically to improved polyurethane/urea elastomers having high temperature stability to about 140-150° C. and low temperature flexibility at about -35-(-40)° C., for use in dynamic applications. These elastomers are particularly useful for application in belts, specifically in automotive timing or synchronous belts, V-belts, multi V-ribbed or micro-ribbed belts, flat belting and the like. The polyurethane/urea elastomers of the present invention are prepared by reacting polyisocyanate prepolymers with symmetric primary diamine chain extenders, mixtures of symmetric primary diamine chain extenders and secondary diamine chain extenders, or mixtures of symmetric primary diamine chain extenders and non-oxidative polyols, which are all chosen to eliminate the need for catalysts via standard molding processes, and to improve phase separation. The polyisocyanate prepolymers are reaction products of polyols which are nonoxidative at high temperatures, such as polycarbonate polyols, polyester polyols, or mixtures thereof, with organic polyisocyanates which are either compact, symmetric and aromatic, such as para-phenylene diisocyanate, 1,5-naphthalene diisocyanate, and 2,6-toluene diisocyanate, or are aliphatic and possess trans or trans,trans geometric structure, such as trans-1,4-cyclohexane diisocyanate and trans,trans-4,4'-dicyclohexylmethyl diisocyanate.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | spa |
| recordid | cdi_epo_espacenet_ES2164773TT3 |
| source | esp@cenet |
| subjects | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES BLASTING CHAINS CHEMISTRY COMPOSITIONS BASED THEREON ENGINEERING ELEMENTS AND UNITS FITTINGS PREDOMINANTLY USED THEREFOR 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 MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | ELASTOMEROS DE POLIURETANO/UREA DE ALTA TEMPERATURA |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-04T06%3A00%3A10IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=WU,%20WILLIAM,%20W.,%20L&rft.date=2002-03-01&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EES2164773TT3%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |