GB924573A - Process for the polymerisation of lactams - Google Patents
Process for the polymerisation of lactamsInfo
- Publication number
- GB924573A GB924573A GB4408960A GB4408960A GB924573A GB 924573 A GB924573 A GB 924573A GB 4408960 A GB4408960 A GB 4408960A GB 4408960 A GB4408960 A GB 4408960A GB 924573 A GB924573 A GB 924573A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lithium
- caprolactam
- aluminotrihydride
- aluminohydride
- aluminodihydride
- 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
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
- C08G69/18—Anionic polymerisation
- C08G69/20—Anionic polymerisation characterised by the catalysts used
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
A process for the production of polyamides comprises mixing a monomeric lactam having at least six carbon atoms in the ring with a compound of the formula <FORM:0924573/IV(a)/1> where n is from 0 to 3 inclusive and R and R1 are alkyl, cycloalkyl, aryl, alkaryl or aralkyl groups, R and R1 optionally being co-cyclic, and maintaining the mixture at a temperature above its melting point until a solid product is obtained. Accelerators, e.g. organic isocyanates, carbodiimides or acyl halides may be present in the reaction mixture. Specified lactams are S -caprolactam, enantholactam, capryllactam, dodecanolactam, a -methyl-S -caprolactam, b :d -dimethyl caprolactam and b -phenyl-S -caprolactam. Specified lithium aluminium compounds are lithium tris-(diethylamino) aluminohydride, lithium tris-(diphenylamino) aluminohydride, lithium tris-(N-ethyl-N-phenylamino) aluminohydride, lithium bis-(dicyclohexylamino) aluminodihydride, lithium bis-(di-n-propylamino) aluminodihydride, lithium bis-(N-methyl-N-phenylamino) aluminodihydride, lithium (di-isobutylamino) aluminotrihydride, lithium (dibenzylamino) aluminotrihydride and lithium (N-cyclohexyl-N-methylamino) aluminotrihydride. Inert substances, e.g. finely-divided metals, glass fibres or graphite may be included in the reaction mixture. In the examples:- (1) S -caprolactam is polymerized in the presence of lithium tris-(diethylamino) aluminohydride and (2) capryllactam is polymerized in the presence of lithium (di-isobutylamino) aluminotrihydride. Specification 924,453 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4408960A GB924573A (en) | 1960-12-22 | 1960-12-22 | Process for the polymerisation of lactams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4408960A GB924573A (en) | 1960-12-22 | 1960-12-22 | Process for the polymerisation of lactams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB924573A true GB924573A (en) | 1963-04-24 |
Family
ID=10431709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4408960A Expired GB924573A (en) | 1960-12-22 | 1960-12-22 | Process for the polymerisation of lactams |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB924573A (en) |
-
1960
- 1960-12-22 GB GB4408960A patent/GB924573A/en not_active Expired
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