ES218247A1 - Improvements in or relating to linear polyamides - Google Patents
Improvements in or relating to linear polyamidesInfo
- Publication number
- ES218247A1 ES218247A1 ES0218247A ES218247A ES218247A1 ES 218247 A1 ES218247 A1 ES 218247A1 ES 0218247 A ES0218247 A ES 0218247A ES 218247 A ES218247 A ES 218247A ES 218247 A1 ES218247 A1 ES 218247A1
- Authority
- ES
- Spain
- Prior art keywords
- polyamide
- group
- diamines
- dibasic acids
- linear polyamides
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0831—Compensation of the diversity switching process for non-uniform properties or faulty operations of the switches used in the diversity switching process
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
Linear polyamides are prepared from (a) a solid mixture of the stereo-isomers of bis-(aminocyclohexyl) methane and (b) a mixture of 100 mol. of sebacic acid with 12.5-77.5 mols. of adipic acid. Up to 15 per cent of the polyamide-forming ingredients may be the conventional diamines, dibasic acids or a monoamino-monocarboxylic acid or caprolactam. Some or all of the polyamide-forming ingredients may be present as derivatives or the diamines and dibasic acids may be used as preformed salts. A monofunctional amide-forming reactant may be present, as described in Specification 495,790, [Group IV]. The products are particularly suitable for transparent films or wire-coating enamels. The usual reaction procedures are employed. A number of specific examples are given. Specifications 619,706, [Group IV (b)] and 619,707 also are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3167753A GB760025A (en) | 1953-11-16 | 1953-11-16 | Improvements in or relating to linear polyamides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES218247A1 true ES218247A1 (en) | 1955-06-01 |
Family
ID=38524561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0218247A Expired ES218247A1 (en) | 1953-11-16 | 1954-11-05 | Improvements in or relating to linear polyamides |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE533330A (en) |
| ES (1) | ES218247A1 (en) |
| FR (1) | FR1118435A (en) |
| GB (1) | GB760025A (en) |
| NL (1) | NL83393C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2732928A1 (en) * | 1977-07-21 | 1979-02-01 | Bayer Ag | TRANSPARENT POLYAMIDE |
| DE2737257A1 (en) * | 1977-08-18 | 1979-03-01 | Bayer Ag | TRANSPARENT POLYAMIDE |
| DE2855928A1 (en) * | 1978-12-23 | 1980-07-10 | Bayer Ag | NEW COPOLYAMID |
-
1953
- 1953-11-16 GB GB3167753A patent/GB760025A/en not_active Expired
-
1954
- 1954-11-05 ES ES0218247A patent/ES218247A1/en not_active Expired
- 1954-11-06 NL NL192169A patent/NL83393C/xx active
- 1954-11-15 BE BE533330D patent/BE533330A/xx unknown
- 1954-11-16 FR FR1118435D patent/FR1118435A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL83393C (en) | 1956-11-15 |
| BE533330A (en) | 1958-04-11 |
| GB760025A (en) | 1956-10-31 |
| FR1118435A (en) | 1956-06-05 |
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