METHOD OF COMPOUNDING POLYMERS
The extruder has at least: one melting zone, two de-gasification zones, and a mixing zone for an entrainment gas. Degasification of the melt is achieved using inert entrainment gas. This is introduced into the polymer melt. It is subsequently removed from the extruder, bringing out the volatile comp...
Saved in:
Main Authors | , , , |
---|---|
Format | Patent |
Language | English French German |
Published |
13.05.2009
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Abstract | The extruder has at least: one melting zone, two de-gasification zones, and a mixing zone for an entrainment gas. Degasification of the melt is achieved using inert entrainment gas. This is introduced into the polymer melt. It is subsequently removed from the extruder, bringing out the volatile compounds with it. The gas and volatiles are removed from the extruder by pressure reduction to below 500 mbar. The gas is nitrogen, a noble gas or carbon dioxide. The polymers are thermoplastics. The polymers compounded together, are selected from two groups; the first reverts by thermal cracking, the second does not. The first group includes polystyrene, its co- or graft copolymers, polyacrylates, polyalkylenes and polyamide. The second group comprises polycarbonate, polyester carbonate and polyalkylene terephthalate. A combination of acrylonitrile butadiene styrene graft copolymer and polycarbonate is used. Mixing ratios of polymers from the two groups, range from 1 : 10 to 2 : 1. There are two successive stages of entrainment gas injection and de-gasification. A two-shaft, co-rotating screw extruder is used. The screw shaft length-to-diameter ratio is 32-44. Further possible zone combinations are elaborated. The quantity of entrainment gas amounts to 0.1% to 0.5% based on the total throughput of starting materials. Entrainment gas is added in the screw mixing zone, or immediately ahead of it. |
---|---|
AbstractList | The extruder has at least: one melting zone, two de-gasification zones, and a mixing zone for an entrainment gas. Degasification of the melt is achieved using inert entrainment gas. This is introduced into the polymer melt. It is subsequently removed from the extruder, bringing out the volatile compounds with it. The gas and volatiles are removed from the extruder by pressure reduction to below 500 mbar. The gas is nitrogen, a noble gas or carbon dioxide. The polymers are thermoplastics. The polymers compounded together, are selected from two groups; the first reverts by thermal cracking, the second does not. The first group includes polystyrene, its co- or graft copolymers, polyacrylates, polyalkylenes and polyamide. The second group comprises polycarbonate, polyester carbonate and polyalkylene terephthalate. A combination of acrylonitrile butadiene styrene graft copolymer and polycarbonate is used. Mixing ratios of polymers from the two groups, range from 1 : 10 to 2 : 1. There are two successive stages of entrainment gas injection and de-gasification. A two-shaft, co-rotating screw extruder is used. The screw shaft length-to-diameter ratio is 32-44. Further possible zone combinations are elaborated. The quantity of entrainment gas amounts to 0.1% to 0.5% based on the total throughput of starting materials. Entrainment gas is added in the screw mixing zone, or immediately ahead of it. |
Author | SCHWEMLER, CHRISTOPH RUDOLF, REINER LUEDEKE, MARTIN KORDS, CHRISTIAN |
Author_xml | – fullname: LUEDEKE, MARTIN – fullname: RUDOLF, REINER – fullname: SCHWEMLER, CHRISTOPH – fullname: KORDS, CHRISTIAN |
BookMark | eNrjYmDJy89L5WSQ83UN8fB3UfB3U3D29w3wD_Vz8fRzVwjw94n0dQ0K5mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BRgam5kYG5o6GxkQoAQBSdiLN |
ContentType | Patent |
DBID | EVB |
DatabaseName | esp@cenet |
DatabaseTitleList | |
Database_xml | – sequence: 1 dbid: EVB name: esp@cenet url: http://worldwide.espacenet.com/singleLineSearch?locale=en_EP sourceTypes: Open Access Repository |
DeliveryMethod | fulltext_linktorsrc |
Discipline | Medicine Chemistry Sciences |
DocumentTitleAlternate | VERFAHREN ZUM COMPOUNDIEREN VON POLYMEREN PROCÉDÉ DE COMPOUNDAGE DE POLYMÈRES |
ExternalDocumentID | EP2057207A1 |
GroupedDBID | EVB |
ID | FETCH-epo_espacenet_EP2057207A13 |
IEDL.DBID | EVB |
IngestDate | Fri Jul 19 13:59:41 EDT 2024 |
IsOpenAccess | true |
IsPeerReviewed | false |
IsScholarly | false |
Language | English French German |
LinkModel | DirectLink |
MergedId | FETCHMERGED-epo_espacenet_EP2057207A13 |
Notes | Application Number: EP20070801623 |
OpenAccessLink | https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090513&DB=EPODOC&CC=EP&NR=2057207A1 |
ParticipantIDs | epo_espacenet_EP2057207A1 |
PublicationCentury | 2000 |
PublicationDate | 20090513 |
PublicationDateYYYYMMDD | 2009-05-13 |
PublicationDate_xml | – month: 05 year: 2009 text: 20090513 day: 13 |
PublicationDecade | 2000 |
PublicationYear | 2009 |
RelatedCompanies | BAYER MATERIALSCIENCE AG |
RelatedCompanies_xml | – name: BAYER MATERIALSCIENCE AG |
Score | 2.740404 |
Snippet | The extruder has at least: one melting zone, two de-gasification zones, and a mixing zone for an entrainment gas. Degasification of the melt is achieved using... |
SourceID | epo |
SourceType | Open Access Repository |
SubjectTerms | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
Title | METHOD OF COMPOUNDING POLYMERS |
URI | https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090513&DB=EPODOC&locale=&CC=EP&NR=2057207A1 |
hasFullText | 1 |
inHoldings | 1 |
isFullTextHit | |
isPrint | |
link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwY2BQMQedfZtqmaxrmGZoDLrCLFU3Cdiw1k1LAta9aYmpoPU3oNUWfmYeoSZeEaYRTAyZsL0w4HNCy8GHIwJzVDIwv5eAy-sCxCCWC3htZbF-UiZQKN_eLcTWRQ3WOwadNmWs5uJk6xrg7-LvrObsDGSp-QUB5UzNjQzMHYEdJVZQKxp0zL5rmBNoU0oBco3iJsjAFgA0LK9EiIEpJVWYgdMZdvGaMAOHL3S-G8iEZr1iEQY5X9cQD38XBX83BWd_3wD_UD8XTz93hQB_n0hf16BgUQYFN9cQZw9doEXxcE_FuwbAnWQsxsAC7OunSjAomIMOz0k0TAK2Io1NLC1MkyzTjC0tEtNMTZJT0xLNLSQZJHEaI4VHTpqBCzINYqpraCzDwFJSVJoqC6xNS5LkwOEAAPHFdbM |
link.rule.ids | 230,309,786,891,25594,76903 |
linkProvider | European Patent Office |
linkToHtml | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LT4NAEJ401VhvWjXWR-VguBFFwIVDY-wuSBVYUqmpp4bFJelFG4vx7zuLpXrR22Yn2VcyO_PtzHwLcE4U9630CsMsTUt9YSYNgY61UQq0vWUuVf6NyrZIrsOJfT91pi2YN7UwNU_oZ02OiBpVoL5X9X29-HnEYnVu5fJCzLHr7SbIBkxv0LFim7J0Nhz4KWec6pRiS0_GKHPI1SW5RaC0QRAR1kjpaaiKUha_LUqwA5spDvZa7ULrRXahQ5uP17qwFa_i3dhcqd5yD_qxn4WcaTzQKI9TPknYKLnTUh49x_74cR-0wM9oaOBEs_WmZn66XpJ1AG3E-vIQNKLIc3JToBdp2Z7rCK-0PDcvHbuQZU7cHvT-HOboH9kZdMIsjmbRKHk4hu3vkIhjmNYJtKv3D3mKlrUS_fpMvgCXL3id |
openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.title=METHOD+OF+COMPOUNDING+POLYMERS&rft.inventor=LUEDEKE%2C+MARTIN&rft.inventor=RUDOLF%2C+REINER&rft.inventor=SCHWEMLER%2C+CHRISTOPH&rft.inventor=KORDS%2C+CHRISTIAN&rft.date=2009-05-13&rft.externalDBID=A1&rft.externalDocID=EP2057207A1 |