Global Patent Index - EP 1320568 A2

EP 1320568 A2 2003-06-25 - METHOD FOR PRODUCING POLYETHYLENE TEREPHTHAHLATE MODIFIED WITH O-PHTHALIC ACID UNITS

Title (en)

METHOD FOR PRODUCING POLYETHYLENE TEREPHTHAHLATE MODIFIED WITH O-PHTHALIC ACID UNITS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON MIT O-PHTHALSÄUREEINHEITEN MODIFIZIERTEM POLYETHYLENTEREPHTHALAT

Title (fr)

PROCEDE DE PRODUCTION DE POLYETHYLENTEREPHTHALAT MODIFIE PAR DES UNITES D'ACIDE O-PHTHALIQUE

Publication

EP 1320568 A2 (DE)

Application

EP 00949089 A

Priority

  • DE 0001926 W
  • DE 19930705 A

Abstract (en)

[origin: DE19930705A1] The invention relates to a method for producing polyethylene terephthalate modified with phthalic acid units in such a way as to avoid high losses of phthalic acid during the esterification and the polycondensation and in such a way as to keep the advantageous application technology properties provided by the phthalic acid. According to the invention, a precondensate consisting of phthalic acid anhydride and ethylene glycol, produced without a catalyst, is added in the esterification and/or polycondensation stage. The ethylene glycol is used with a molar excess of 2 to 3.5 in relation to the phthalic acid anhydride.

IPC 1-7 (main, further and additional classification)

C08G 63/78

IPC 8 full level (invention and additional information)

C08G 63/181 (2006.01); C08G 63/183 (2006.01); C08G 63/78 (2006.01)

CPC (invention and additional information)

C08G 63/183 (2013.01); C08G 63/78 (2013.01)

Citation (search report)

See references of WO 0102461A3

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19930705 A1 20010104; AR 032744 A1 20031126; AU 6259700 A 20010122; CA 2377603 A1 20010111; DE 10081855 D2 20020529; EP 1320568 A2 20030625; JP 2003504436 A 20030204; MX PA01013409 A 20040906; TW 553973 B 20030921; US 6515080 B1 20030204; WO 0102461 A2 20010111; WO 0102461 A3 20010329

INPADOC legal status


2004-10-06 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040406

2003-06-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020204

2003-06-25 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE