Global Patent Index - EP 1732748 A1

EP 1732748 A1 20061220 - METHOD FOR PROCESSING CYCLIC OLIGOMERS TO THERMOPLASTIC PBT PLASTICS

Title (en)

METHOD FOR PROCESSING CYCLIC OLIGOMERS TO THERMOPLASTIC PBT PLASTICS

Title (de)

VERARBEITUNG VON ZYKLISCHEN OLIGOMEREN ZU THERMOPLASTISCHEN PBT-KUNSTSTOFFEN

Title (fr)

TRANSFORMATION D'OLIGOMERES CYCLIQUES EN MATIERES PLASTIQUES THERMOPLASTIQUES A BASE DE PBT

Publication

EP 1732748 A1 20061220 (DE)

Application

EP 05707530 A 20050219

Priority

  • EP 2005001743 W 20050219
  • EP 04405128 A 20040304
  • EP 05707530 A 20050219

Abstract (en)

[origin: EP1570976A1] Fiber-reinforced plate production from a thermoplastic matrix- impregnated fiber web with >=1 flat fiber structure (I) involves coating or impregnating (I) with a reactive starting material (II) containing (macro)cyclic polyester oligomers; #coating the thus obtained web on 1 or both sides with a cover layer (III) containing polymerized polyester; and #pressing the web to polymerize (II) in the matrix surrounding (I) and bonded to (III). Independent claims are also included for production of fiber-reinforced plastics articles containing a fiber structure (I) embedded in a polyester matrix by making a thermoplastic matrix by heating and pressing a structure (I) and a reactive starting material (II) containing (macro)cyclic polyester oligomers together with a polymerization catalyst in a mold cavity, the cavity wall being coated with a film of a reactive starting material containing (macro)cyclic polyester oligomers or of a polymerized polyester such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or a PBT polymer blend; #production of a multi-layer composite having >=1 foam layer bonded to a cover layer comprising a fiber-reinforced plate material, the foam and also the plate material containing a polyester matrix and the composite being produced by bonding a fiber layer impregnated or coated with a reactive starting material containing (macro)cyclic polyester oligomers and also a polymerization catalyst to a foam layer of polymerized polyester to form a laminate and then polymerizing the starting material to form the plastics matrix of the plate material and internally bond it with the foam; #production of a foam-containing composite of the type described in (b) above by extruding the starting material also containing a foaming agent onto the plate material followed by a release of pressure to give a foam layer which is then bonded to the plate material; and #production of a fiber-reinforced plastics article with both the fiber reinforcement and the plastics matrix being of a polyester, the production involving forming the polyester fibres which have directed crystallinity to give a fiber structure and processing the structure to give a plastics matrix-forming fiber-reinforced article, the fiber surfaces being melted and then solidified to form an isotropic plastics matrix surrounding the non-melted part of the fibers.

IPC 8 full level

B29C 70/02 (2006.01); B29C 37/00 (2006.01); B29C 44/32 (2006.01); B29C 67/24 (2006.01); B29C 70/04 (2006.01); B29C 70/46 (2006.01); B29C 70/50 (2006.01); B29C 70/68 (2006.01)

CPC (source: EP)

B29C 37/0032 (2013.01); B29C 44/321 (2016.11); B29C 44/326 (2013.01); B29C 67/246 (2013.01); B29C 70/04 (2013.01); B29C 70/465 (2013.01); B29C 70/506 (2013.01); B29K 2067/00 (2013.01)

Citation (search report)

See references of WO 2005084925A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1570976 A1 20050907; CN 1925977 A 20070307; EP 1732748 A1 20061220; EP 1992472 A1 20081119; EP 1995042 A1 20081126; JP 2007526375 A 20070913; US 2007182047 A1 20070809; WO 2005084925 A1 20050915

DOCDB simple family (application)

EP 04405128 A 20040304; CN 200580006631 A 20050219; EP 05707530 A 20050219; EP 08013932 A 20050219; EP 08013933 A 20050219; EP 2005001743 W 20050219; JP 2007501156 A 20050219; US 59111105 A 20050219