RO81963B1 - Procedeu pentru obtinerea poliesterilor - Google Patents
Procedeu pentru obtinerea poliesterilorInfo
- Publication number
- RO81963B1 RO81963B1 RO103852A RO10385281A RO81963B1 RO 81963 B1 RO81963 B1 RO 81963B1 RO 103852 A RO103852 A RO 103852A RO 10385281 A RO10385281 A RO 10385281A RO 81963 B1 RO81963 B1 RO 81963B1
- Authority
- RO
- Romania
- Prior art keywords
- reaction
- temperature
- obtaining polyesters
- polycondensation
- pressure
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 229920000728 polyester Polymers 0.000 title abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000006068 polycondensation reaction Methods 0.000 abstract 2
- 238000010992 reflux Methods 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 150000008064 anhydrides Chemical class 0.000 abstract 1
- 150000001991 dicarboxylic acids Chemical class 0.000 abstract 1
- 150000002009 diols Chemical class 0.000 abstract 1
- 238000004821 distillation Methods 0.000 abstract 1
- 239000004014 plasticizer Substances 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
Procedeu pentru obtinerea poliesterilor destinati obtinerii polouretanilor sau plastifiantilor polimeri din acizii dicarboxilici sau anhidridele acestora si derivatii polihidroxilici, prin policondensarea în topitura, în care, în scopul maririi vite zei de reactie, respectiv scurtarii ciclului de policondensare se efectueaza poliesterificarea dintre componenta acida si diol la un raport echimolar, în prima faza la temperatura de 140...150 degree C si presiune atmosferica, recuperarea apei de reactie, realizîndu-se prin distilare sub reflux, urmata de ridicarea temperaturii la 240...250 degree C si coborîrea presiunii la 10...20 mm Hg, cu reflux total pîna la finalul reactiei.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO81103852A RO81963A2 (ro) | 1981-03-30 | 1981-03-30 | Procedeu pentru obtinerea poliesterilor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO81103852A RO81963A2 (ro) | 1981-03-30 | 1981-03-30 | Procedeu pentru obtinerea poliesterilor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO81963B1 true RO81963B1 (ro) | 1983-06-30 |
| RO81963A2 RO81963A2 (ro) | 1983-07-07 |
Family
ID=20109758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO81103852A RO81963A2 (ro) | 1981-03-30 | 1981-03-30 | Procedeu pentru obtinerea poliesterilor |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO81963A2 (ro) |
-
1981
- 1981-03-30 RO RO81103852A patent/RO81963A2/ro unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO81963A2 (ro) | 1983-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GR3006204T3 (ro) | ||
| DE3769900D1 (de) | Verfahren zur herstellung von furan durch decarbonylisierung von furfural. | |
| FR2601376B1 (fr) | Procede de preparation de copolyamides a base d'hexamethylenediamine, d'acide adipique, eventuellement d'au moins un autre diacide carboxylique a chaine courte et acide dimere | |
| ATE37887T1 (de) | Verfahren zur rueckgewinnung von alkalimetall terminierten harzigen copolymerisaten. | |
| DE3783927D1 (de) | Schaltkreis zum detektieren hoher spannungen. | |
| EP1686146A4 (en) | PROCESS FOR PREPARING ALIPHATIC POLYESTER | |
| DE3760423D1 (en) | Process for producing thermoplastically processable aromatic polyamides | |
| ATE116080T1 (de) | Dekodierung von zufallssequenzen. | |
| DE69332658D1 (de) | Tintenzusammensetzung und herstellungsverfahren, gebrauch und rückgewinnung dieser zusammensetzung | |
| DE69008141D1 (de) | Verfahren zum Ozonisieren von Wasser mit Aktivierung durch heterogene Katalyse. | |
| RO81963B1 (ro) | Procedeu pentru obtinerea poliesterilor | |
| IT8622744A0 (it) | Procedimento epr la produzione di acidi umici rigenerati da carbone. | |
| DE3865068D1 (de) | Alpha-amino-epsilon-caprolactam-modifizierte polyamide aus dicarbonsaeuren/diaminen. | |
| DE3887434D1 (de) | Verfahren zur Gewinnung von Caprolactam aus Leichtsiedern oder Schwersiedern der Caprolactamdestillation oder Gemischen derselben. | |
| EP0181603A3 (en) | A cross-linked resin, a process for producing the same, and a resin composition including the same | |
| JPS5530603A (en) | Position detector | |
| DE3767691D1 (de) | Schaltung zur formung des von einem kontakt produzierten signals. | |
| JPS526796A (en) | Process for preparing polyester elastomers | |
| DE3850069D1 (de) | Bildsensor, unempfänglich für Rauschsignale, verursacht durch eine Wechselstromversorgung. | |
| JPS5277532A (en) | Bar code reading unit | |
| ES406375A1 (es) | Procedimiento para la obtencion de poliamidas transparen- tes. | |
| JPS5712079A (en) | Hot melt adhesive | |
| JPS5352596A (en) | Preparation of oil-modified alkyd resin | |
| SE9803965L (sv) | Allyloxikarboxylsyror | |
| RO92779B1 (ro) | Procedeu pentru prepararea unor esteri bis-piperidinici |