EP 1196490 A1 20020417 - EXTRUDED PRODUCTS FROM POLYETHYLENE TEREPHTHALATE WITH REDUCED ACETALDEHYDE CONTENT AND PROCESS OF THEIR PRODUCTION
Title (en)
EXTRUDED PRODUCTS FROM POLYETHYLENE TEREPHTHALATE WITH REDUCED ACETALDEHYDE CONTENT AND PROCESS OF THEIR PRODUCTION
Title (de)
EXTRUIERTE PRODUKTE AUS POLYETHYLENTERAPHTHALATE MIT REDUZIERTEM ACETALDEHYDGEHALT UND HERSTELLUNGSPROZESS
Title (fr)
PRODUITS EXTRUDES A PARTIR DE TEREPHTALATE DE POLYETHYLENE POSSEDANT UNE TENEUR LIMITEE EN ACETALDEHYDE ET LEUR PROCEDE DE FABRICATION
Publication
Application
Priority
- US 0017996 W 20000629
- US 14174399 P 19990630
- US 14995499 P 19990819
- US 17668500 P 20000118
- US 20485900 P 20000517
Abstract (en)
[origin: WO0100724A1] Polyols with at least one primary hydroxy function and at least one other primary, secondary or tertiary hydroxy function in the 2 and/or 3 position are used as additives in concentrations from 50 ppm to 5,000 ppm in order to reduce the acetaldehyde content of extruded products of polyetheylene terephthalate. Sugar alcohols, such as sorbitol, mannitol or xylitol, are preferably used. Additionally, ionic compounds, preferably easily soluble ionic compounds, such as alkali compounds, can be admixed in amounts from 0.05 ppm to 50 ppm. According to the present invention, aqueous polyol solutions are sprayed onto polyethylene terephthalate pellets after polycondensation or after the second polycondensation stage, also known as solid state polymerization, or said pellets are produced through extrusion with a polyol content of less than or equal to 25 percent by weight, pelletized, and admixed as a masterbatch with a polyester prior to processing.
IPC 1-7
IPC 8 full level
C08J 3/22 (2006.01); B29C 47/00 (2006.01); C08K 5/053 (2006.01); C08K 5/098 (2006.01); C08L 67/02 (2006.01); B29K 67/00 (2006.01); B29K 105/16 (2006.01)
CPC (source: EP)
C08K 5/053 (2013.01); C08K 5/098 (2013.01)
Citation (search report)
See references of WO 0100724A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0100724 A1 20010104; AR 024614 A1 20021016; AU 6339700 A 20010131; CA 2377237 A1 20010104; EP 1196490 A1 20020417; JP 2003503573 A 20030128; MX PA01013391 A 20020702
DOCDB simple family (application)
US 0017996 W 20000629; AR P000103298 A 20000629; AU 6339700 A 20000629; CA 2377237 A 20000629; EP 00950271 A 20000629; JP 2001506731 A 20000629; MX PA01013391 A 20000629