ES219665A1 - Procedure for the preparation of polyesters of high molecular weight with high optical activity (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the preparation of polyesters of high molecular weight with high optical activity (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES219665A1 ES219665A1 ES219665A ES219665A ES219665A1 ES 219665 A1 ES219665 A1 ES 219665A1 ES 219665 A ES219665 A ES 219665A ES 219665 A ES219665 A ES 219665A ES 219665 A1 ES219665 A1 ES 219665A1
- Authority
- ES
- Spain
- Prior art keywords
- translation
- preparation
- molecular weight
- machine
- legally binding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 2
- 230000003287 optical effect Effects 0.000 title abstract 2
- 229920000728 polyester Polymers 0.000 title abstract 2
- 238000002360 preparation method Methods 0.000 title abstract 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 239000004310 lactic acid Substances 0.000 abstract 1
- 235000014655 lactic acid Nutrition 0.000 abstract 1
- 229910000464 lead oxide Inorganic materials 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 1
- 239000011787 zinc oxide Substances 0.000 abstract 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
Process for the preparation of high molecular weight polyesters, with high optical activity, characterized in that they are condensed by heat or, respectively, polymerized, optically active lactic acid, or its derivatives, which contain no more than 20%, preferably no more than 10% of the component that rotates in the opposite direction, possibly in the presence of acidic, neutral or slightly basic materials forming the reaction such as lead oxide, zinc oxide and magnesium oxide, it being convenient that the temperature of condensation is below 250º c, preferably between 100 and 180º c. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES219665A ES219665A1 (en) | 1955-01-21 | 1955-01-21 | Procedure for the preparation of polyesters of high molecular weight with high optical activity (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES219665A ES219665A1 (en) | 1955-01-21 | 1955-01-21 | Procedure for the preparation of polyesters of high molecular weight with high optical activity (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES219665A1 true ES219665A1 (en) | 1956-01-01 |
Family
ID=65627897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES219665A Expired ES219665A1 (en) | 1955-01-21 | 1955-01-21 | Procedure for the preparation of polyesters of high molecular weight with high optical activity (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES219665A1 (en) |
-
1955
- 1955-01-21 ES ES219665A patent/ES219665A1/en not_active Expired
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