GB864839A - Process for the preparation of polymeric materials of the polyamide type - Google Patents
Process for the preparation of polymeric materials of the polyamide typeInfo
- Publication number
- GB864839A GB864839A GB8733/58A GB873358A GB864839A GB 864839 A GB864839 A GB 864839A GB 8733/58 A GB8733/58 A GB 8733/58A GB 873358 A GB873358 A GB 873358A GB 864839 A GB864839 A GB 864839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- diamine
- pressure
- xylylene
- temperature
- 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
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
Superpolyamides are made by heating an aqueous slurry containing from 60 to 95% by weight of a nylon salt of m-xylylene diamine and an aliphatic dibasic acid containing from 6 to 10 carbon to a temperature of from 390 DEG to 490 DEG F. under a steam pressure of from 40 to 150 pounds per square inch gauge, the pressure being maintained by removal of steam from the reaction mixture, to produce a low polymer having a reduced viscosity in the range of from 0,4 to 0,7 at 0,5% by weight concentration in m-cresol, and thereafter producing a high polymer by reducing the pressure to atmospheric or below to remove water, raising the temperature above the melting point of the low polymer and continuing the polymerization of the low polymer at a temperature of from 470 DEG to 540 DEG F. to produce a polymer having a reduced viscosity in the range of from 0,9 to 2,0 at 0,5% by weight concentration in m-cresol. The reactants may contain viscosity stabilizers, e.g. acetic acid, metaxylylene diacetate or excess of the dicarboxylic acid or diamine. Copolyamides may be formed by the inclusion with the reactants of hexamethylene diamine or additional acids. The examples describe the preparation of polyamides from m-xylylene diammonium adipate and m-xylylene diammonium azelate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1201523XA | 1957-03-18 | 1957-03-18 | |
| US864839XA | 1957-03-18 | 1957-03-18 | |
| US646547A US2997463A (en) | 1957-03-18 | 1957-03-18 | Process for the preparation of polymeric materials of the polymamide type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB864839A true GB864839A (en) | 1961-04-06 |
Family
ID=29424355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8733/58A Expired GB864839A (en) | 1957-03-18 | 1958-03-18 | Process for the preparation of polymeric materials of the polyamide type |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1201523A (en) |
| GB (1) | GB864839A (en) |
-
1958
- 1958-03-10 FR FR1201523D patent/FR1201523A/en not_active Expired
- 1958-03-18 GB GB8733/58A patent/GB864839A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1201523A (en) | 1959-12-30 |
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