ES395282A3 - Improvements introduced in a procedure to concentrate a thermoplastic polymer. (Machine-translation by Google Translate, not legally binding) - Google Patents
Improvements introduced in a procedure to concentrate a thermoplastic polymer. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES395282A3 ES395282A3 ES395282A ES395282A ES395282A3 ES 395282 A3 ES395282 A3 ES 395282A3 ES 395282 A ES395282 A ES 395282A ES 395282 A ES395282 A ES 395282A ES 395282 A3 ES395282 A3 ES 395282A3
- Authority
- ES
- Spain
- Prior art keywords
- solution
- polymer
- solvent
- pressure
- translation
- 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
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Improvements introduced in a process for concentrating a thermoplastic polymer of a solution thereof having no more than 50% by weight of said polymer, whose improvements comprise the steps of (a) rapidly preheating the solution at a temperature of 200 to 350ºC within a period not exceeding 60 minutes and under a pressure at least equal to the autogenous pressure, and (b) subsequently releasing said heated solution in a deflagration chamber maintained at less than 50 lpcm by removal of solvent vaporized therefrom, under from which a concentrated solution of at least 80% by weight of said polymer is obtained, (c) passing said concentrated polymer solution through a heating zone whose pressure at the outlet end is maintained at a lower absolute value at 30 mm hg and at a temperature of 200 to 290ºC and substantially vaporize the solvent of said solution; (d) passing the vapor-liquid mixture leaving said heating zone to a receiving zone maintained at a pressure of 1 to 4 mm hg absolute by removal of vaporized solvent therefrom; and (e) removing the polymer from said receiving zone in molten form essentially free of said solvent. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES395282A ES395282A3 (en) | 1971-09-21 | 1971-09-21 | Improvements introduced in a procedure to concentrate a thermoplastic polymer. (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES395282A ES395282A3 (en) | 1971-09-21 | 1971-09-21 | Improvements introduced in a procedure to concentrate a thermoplastic polymer. (Machine-translation by Google Translate, not legally binding) |
Publications (1)
Publication Number | Publication Date |
---|---|
ES395282A3 true ES395282A3 (en) | 1975-11-01 |
Family
ID=8459194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES395282A Expired ES395282A3 (en) | 1971-09-21 | 1971-09-21 | Improvements introduced in a procedure to concentrate a thermoplastic polymer. (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES395282A3 (en) |
-
1971
- 1971-09-21 ES ES395282A patent/ES395282A3/en not_active Expired
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