SU138030A1 - The method of producing polycarbonates - Google Patents
The method of producing polycarbonatesInfo
- Publication number
- SU138030A1 SU138030A1 SU668906A SU668906A SU138030A1 SU 138030 A1 SU138030 A1 SU 138030A1 SU 668906 A SU668906 A SU 668906A SU 668906 A SU668906 A SU 668906A SU 138030 A1 SU138030 A1 SU 138030A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- polycarbonates
- producing polycarbonates
- diphenylolpropane
- producing
- ester
- Prior art date
Links
Landscapes
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Во всех известных способах получени поликарбонатов чистота исходных продуктов вл етс важнейшим условием получени полимеров с комплексом ценных свойств.In all known methods for producing polycarbonates, the purity of the starting products is the most important condition for obtaining polymers with a complex of valuable properties.
Особенно затруднено получение чистого 4,4-диоксидифенил-2,2-пропана , вл ющегос основным сырьем дл получени поликарбонатов. Очистка этого продукта до нужной дл синтеза поликарбонатов степени чистоты, т. е. до получени вещества с температурой плавлени 156- 157°, требует неоднократной перекристаллизации его из уксусной кислоты или хлорбензола.The preparation of pure 4,4-dioxydiphenyl-2,2-propane, which is the main raw material for the production of polycarbonates, is particularly difficult. Purification of this product to the desired purity for the synthesis of polycarbonates, i.e., to obtain a substance with a melting point of 156-157 °, requires repeated recrystallization of it from acetic acid or chlorobenzene.
Предл.оженный новый способ получени поликарбонатов конденсацией дифенилолпропана с метиловым эфиром хлоругольной кислоты в присутствии пиридина позвол ет использовать технический дифенилолпропан без его предварительной очистки, дл чего процесс ведут в две стадии - с однократной перекристаллизацией образующегос полупродукта из метилового спирта и переэтерификацией его в присутствии оксиметилата натри и тетрабутоксититана.The proposed new method of producing polycarbonates by condensation of diphenylolpropane with chlorotic acid methyl ester in the presence of pyridine allows technical diphenylolpropane to be used without preliminary purification, for which the process is carried out in two stages — with a single recrystallization of the resulting intermediate from methyl alcohol and transesterification of it in the presence of hydroxymethyl in the presence of oximethyl and tetrabutoxytitanium.
Исходным продуктом дл проведени описанного синтеза служит технический дифенилолпропан с температурой плавлени 150-15Г.The starting product for carrying out the described synthesis is technical diphenylolpropane with a melting point of 150-15 °.
В первой стадии из дифенилолпропана и монометилового эфира хлоругольной кислоты в среде пиридина, который примен ют дл св зывани выдел ющегос хлористого водорода, получают 4,4-диоксидикарбометоксидифенил-2 ,2-пропан (в дальнейщем называемый - эфир ДМ). Реакци протекает по следующей схеме:In the first stage, 4,4-dioxydicarbomethoxydiphenyl-2, 2-propane (hereinafter referred to as DM ester) is obtained from diphenylolpropane and chlorogolic acid monomethyl ester in pyridine, which is used to bind the released hydrogen chloride. The reaction proceeds as follows:
СНзОСНзСНзSNSOSNzSNz
I/II / i
НО - СбН4-С-СеН4ОН f С О- СНзО-С-О - QH, - C-QH,-O1V 11BUT - SbN4-C-CeH4OH f C O-CH3-CO-O - QH, - C-QH, -O1V 11
СНзС1оСНзСНзС1оСНз
-С-ОСНз-ь2НС1-С-ОСНз-22НС1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU668906A SU138030A1 (en) | 1960-06-01 | 1960-06-01 | The method of producing polycarbonates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU668906A SU138030A1 (en) | 1960-06-01 | 1960-06-01 | The method of producing polycarbonates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU138030A1 true SU138030A1 (en) | 1960-11-30 |
Family
ID=48294204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU668906A SU138030A1 (en) | 1960-06-01 | 1960-06-01 | The method of producing polycarbonates |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU138030A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359242A (en) * | 1963-08-19 | 1967-12-19 | Huels Chemische Werke Ag | Process for producing high molecular weight (cyclo) aliphatic polyesters of carbonicacid with (cyclo) glycols |
| US3506623A (en) * | 1967-10-30 | 1970-04-14 | Huels Chemische Werke Ag | Process for producing high molecular weight (cyclo) aliphatic polyesters of carbonic acid with (cyclo) glycols |
-
1960
- 1960-06-01 SU SU668906A patent/SU138030A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359242A (en) * | 1963-08-19 | 1967-12-19 | Huels Chemische Werke Ag | Process for producing high molecular weight (cyclo) aliphatic polyesters of carbonicacid with (cyclo) glycols |
| US3506623A (en) * | 1967-10-30 | 1970-04-14 | Huels Chemische Werke Ag | Process for producing high molecular weight (cyclo) aliphatic polyesters of carbonic acid with (cyclo) glycols |
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