ES402143A1 - A procedure for the preparation of improved polyamide fibers and films. (Machine-translation by Google Translate, not legally binding) - Google Patents
A procedure for the preparation of improved polyamide fibers and films. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES402143A1 ES402143A1 ES402143A ES402143A ES402143A1 ES 402143 A1 ES402143 A1 ES 402143A1 ES 402143 A ES402143 A ES 402143A ES 402143 A ES402143 A ES 402143A ES 402143 A1 ES402143 A1 ES 402143A1
- Authority
- ES
- Spain
- Prior art keywords
- polyamide
- radicals
- translation
- films
- preparation
- 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
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
A process for the preparation of improved polyamide fibers and films by extruding a dope through a hole in a layer of an inert non-coagulating fluid and then in a coagulating bath, the dope comprising a polyamide consisting essentially of periodic units selected from the group: **(See formula)** where units (I) and (II) if present are found in substantially equimolar amounts, R, R'and R'', which may be the same or different, are divalent radicals, n may be 0 or 1, at least 95 mole% of the total radicals, R, R'and R''in the polyamide is made up of single rigid radicals with prolonged bonds or a series of these rigid radicals linked together directly by prolonged bonds, provided that the rigid cyclic radicals can be linked by azo or azoxy groups, and a solvent selected from the group consisting essentially of sulfuric acid with a concentration of at least 98%, chlorosulfuric acid, fluorsulfuric acid or mixtures thereof, the process of which is characterized by that the concentration of polyamide (C) is at least 30 g/100 ml of solvent and the inherent viscosity of the polyamide is at least 2.0 but not less than 2.8 - 0.05 (C - 30). (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13821071A | 1971-04-28 | 1971-04-28 | |
| US17251571A | 1971-08-17 | 1971-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES402143A1 true ES402143A1 (en) | 1975-11-16 |
Family
ID=26835971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES402143A Expired ES402143A1 (en) | 1971-04-28 | 1972-04-26 | A procedure for the preparation of improved polyamide fibers and films. (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES402143A1 (en) |
-
1972
- 1972-04-26 ES ES402143A patent/ES402143A1/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19950124 |