EnglishPolyesters having relatively low melt viscosities and without excessive level of undesirable reaction byproducts in short reaction times are prepd. from a dicarboxylic acid/ester/ester-forming deriv. and a dihydroxy compd. in the presence of a catalyst compn. comprising a Ti-based compd., a Zr-based compd. and a phosphate. Thus, poly(butylene terephthalate) was prepd. from 705 g di-Me terephthalate and 458 g 1,4-butanediol, using tetra-Bu titanate, Zr tetrakis(2,4-pentanedionate), and sodium dihydrogen phosphate at 0.8 mmol Ti and Zr compds. per mmol di-Me terephthalate and 245°.
| Data di concessione: | 2000 |
| Titolo: | Phosphate-containing catalysts composition for the preparation of polyesters, and related processes |
| Inventore del brevetto: | BANACH T.E.; FIORINI M.; PATEL B.R.; PILATI F.; BERTI C.; MARIANUCCI E.; M. MESSORI; COLONNA M.; TOSELLI M. |
| Autori: | |
| Abstract: | Polyesters having relatively low melt viscosities and without excessive level of undesirable reaction byproducts in short reaction times are prepd. from a dicarboxylic acid/ester/ester-forming deriv. and a dihydroxy compd. in the presence of a catalyst compn. comprising a Ti-based compd., a Zr-based compd. and a phosphate. Thus, poly(butylene terephthalate) was prepd. from 705 g di-Me terephthalate and 458 g 1,4-butanediol, using tetra-Bu titanate, Zr tetrakis(2,4-pentanedionate), and sodium dihydrogen phosphate at 0.8 mmol Ti and Zr compds. per mmol di-Me terephthalate and 245°. |
| Handle: | http://hdl.handle.net/11380/467696 |
| Titolare del brevetto: | General Electric Company, USA |
| Rilevanza: | internazionale |
| Numero di deposito: | US6043335 |
| Appare nelle tipologie: | Brevetto |
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