PL400930A1 - Method for preparing poly (ester-carbonates) with alkylene carbonates - Google Patents
Method for preparing poly (ester-carbonates) with alkylene carbonatesInfo
- Publication number
- PL400930A1 PL400930A1 PL400930A PL40093012A PL400930A1 PL 400930 A1 PL400930 A1 PL 400930A1 PL 400930 A PL400930 A PL 400930A PL 40093012 A PL40093012 A PL 40093012A PL 400930 A1 PL400930 A1 PL 400930A1
- Authority
- PL
- Poland
- Prior art keywords
- ester
- carbonates
- range
- dicarboxylic acid
- mixture
- Prior art date
Links
Landscapes
- Polyesters Or Polycarbonates (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Sposób wytwarzania poli(estro-węglanów) polega na tym, że kwas dikarboksylowy lub ester dimetylowy lub dietylowy kwasu dikarboksylowego, alifatycznego lub aromatycznego lub ich mieszaniny poddaje się reakcji z ?,?-diolem lub mieszaniną dioli w stosunku molowym w granicach od 1:2,6 do 1:21,5 w obecności katalizatora transestryfikacji, w temperaturze 160-200°C, w przepływie gazu obojętnego, odbierając wodę lub metanol lub etanol jako produkt uboczny, otrzymując w jej wyniku bis(hydroksyalkilowy) ester kwasu dikarboksylowego i nieprzereagowany diol. Następnie dodaje się węglan propylenu lub węglan etylenu w stosunku molowym do estru bis(hydroksyalkilowego) kwasu dikarboksylowego jak 1:19 do 19:1 i rozpuszczalnik azeotropujący, w takiej ilości aby utrzymywać temperaturę wrzenia mieszaniny reakcyjnej w granicach 155-180°C i prowadzi reakcję odbierając azeotropowo glikol 1,2-propylenowy lub glikol etylenowy, po czym oddestylowuje się rozpuszczalnik azeotropujący, najpierw pod normalnym ciśnieniem, a następnie stopniowo obniżając ciśnienie, w czasie od 0,5 do 5 godzin, do zakresu od 0,1 do 1 mbara i podnosząc stopniowo temperaturę, w czasie od 1 do 5 godzin, do zakresu od 200 do 220°C.The method of producing poly (ester carbonates) is that the dicarboxylic acid or dimethyl or diethyl ester of dicarboxylic, aliphatic or aromatic acid or a mixture thereof is reacted with a α, β-diol or a mixture of diols in a molar ratio within the range of 1: 2 , 6 to 1: 21.5 in the presence of a transesterification catalyst at 160-200 ° C, in an inert gas flow, receiving water or methanol or ethanol as a by-product, resulting in a bis (hydroxyalkyl) dicarboxylic acid ester and unreacted diol . Then propylene carbonate or ethylene carbonate is added in a molar ratio to the dicarboxylic acid bis (hydroxyalkyl) ester as 1:19 to 19: 1 and the azeotropic solvent in such an amount as to maintain the boiling point of the reaction mixture within 155-180 ° C and reacts receiving azeotropically 1,2-propylene glycol or ethylene glycol, after which the azeotropic solvent is distilled off, first under normal pressure, and then gradually reducing the pressure over a period of 0.5 to 5 hours to a range of 0.1 to 1 mbar and gradually increasing the temperature, over a period of 1 to 5 hours, to a range of 200 to 220 ° C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL400930A PL222347B1 (en) | 2012-09-26 | 2012-09-26 | Method for preparing poly (ester-carbonates) with alkylene carbonates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL400930A PL222347B1 (en) | 2012-09-26 | 2012-09-26 | Method for preparing poly (ester-carbonates) with alkylene carbonates |
Publications (2)
Publication Number | Publication Date |
---|---|
PL400930A1 true PL400930A1 (en) | 2014-03-31 |
PL222347B1 PL222347B1 (en) | 2016-07-29 |
Family
ID=50350311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PL400930A PL222347B1 (en) | 2012-09-26 | 2012-09-26 | Method for preparing poly (ester-carbonates) with alkylene carbonates |
Country Status (1)
Country | Link |
---|---|
PL (1) | PL222347B1 (en) |
-
2012
- 2012-09-26 PL PL400930A patent/PL222347B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL222347B1 (en) | 2016-07-29 |
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