BE452598A - - Google Patents
Info
- Publication number
- BE452598A BE452598A BE452598DA BE452598A BE 452598 A BE452598 A BE 452598A BE 452598D A BE452598D A BE 452598DA BE 452598 A BE452598 A BE 452598A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- molecular weight
- relatively low
- low molecular
- products
- Prior art date
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
- C08G69/04—Preparatory processes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Description
Fabrication de polyamides 4 bas poids moléculaire.
Il.8., été découvert que'par chauffage de mélanges de dia-
<EMI ID=1.1>
peut obtenir de� produits de condensation à poids moléculaire relativement bas Lui représentant des matières de départ -précieuses pour les réactions de polymérisation les plus diverses.
On travaille da.i& le nouveau procédé de telle manière que L'on chauffe la matière de départ pendant peu de ternes à une température de réaction jusqu'à ce que la quantité principale,
<EMI ID=2.1>
ment possible se soit séparée. La séparation de l'eau est en général achevée après peu'de temps. On peut éliminer immédiatement ou bien, dans le cas de réactions en récipients fermés,
<EMI ID=3.1>
Contrairement aux polyamides connues, les présents produits représentent ces composés à poids moléculaire relativement bas qui ne possèdent pas encore de capacité de formation de filaments. La séparation de l'eau se fait en général à des températures .relativement basses au-dessus du point de fusion des masses. Elle peut être favorisée à l'aide du principe de la distillation binaire. Dans ce. mode de travail, les produits. de départ sont chauffés en présence d'un solvant volatil au
<EMI ID=4.1>
caline , de sorte que l'eau de réaction séparée distille en
même temps que les solvants et peut être éliminée. Il est toutefois possible également d'effectuer le chauffage à des températures plus élevées et d'aspirer les constituants volatils
<EMI ID=5.1>
Les produits de réaction obtenus suivant les présents procédés peuvent être' utilisés directement pour les réactions de polymérisation les plus diverses. Il est toutefois avantageux souvent d'effectuer une épuration intermédiaire par lavage ou
<EMI ID=6.1>
niques.
Exemple :
100 parties en poids d'acide adipique et 100 parties en
<EMI ID=7.1>
Manufacture of low molecular weight 4 polyamides.
Il.8., Was discovered that by heating mixtures of di-
<EMI ID = 1.1>
can get from � relatively low molecular weight condensation products which represent valuable starting materials for a wide variety of polymerization reactions.
The new process is worked in such a way that the starting material is heated for a short time at a reaction temperature until the main amount,
<EMI ID = 2.1>
possibly separated. The separation of the water is generally completed after a short time. Can be eliminated immediately or, in the case of reactions in closed containers,
<EMI ID = 3.1>
Unlike the known polyamides, the present products represent those relatively low molecular weight compounds which do not yet possess the ability to form filaments. The separation of water generally takes place at relatively low temperatures above the melting point of the masses. It can be promoted using the principle of binary distillation. In this. mode of work, products. starting points are heated in the presence of a volatile solvent in
<EMI ID = 4.1>
caline, so that the separated reaction water distils into
same time as solvents and can be removed. However, it is also possible to carry out heating at higher temperatures and to aspirate the volatile constituents.
<EMI ID = 5.1>
The reaction products obtained by the present processes can be used directly for the most diverse polymerization reactions. However, it is often advantageous to carry out an intermediate purification by washing or
<EMI ID = 6.1>
nics.
Example:
100 parts by weight of adipic acid and 100 parts by weight
<EMI ID = 7.1>
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE898060X | 1942-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE452598A true BE452598A (en) |
Family
ID=6848982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE452598D BE452598A (en) | 1942-12-18 |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE452598A (en) |
FR (1) | FR898060A (en) |
-
0
- BE BE452598D patent/BE452598A/fr unknown
-
1943
- 1943-09-14 FR FR898060D patent/FR898060A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR898060A (en) | 1945-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Acker et al. | Synthesis of racemic, optically active and radioactive α-lipoic acids | |
US3948814A (en) | Acetaldehyde ethyl linalyl acetal perfume compositions | |
US3714220A (en) | Myrcene-methacrylonitrile adducts | |
BE452598A (en) | ||
EP2049471B1 (en) | Process for preparing a sulphonic acid anhydride | |
Noller et al. | Synthesis of Dihydrochaulmoogric and Dihydrohydnocarpic Acids. II | |
FI88705B (en) | POLYARYLALKANERS OLIGOMERSAMMANSAETTNINGAR OCH FOERFARANDE FOER DERAS FRAMSTAELLNING | |
US2211467A (en) | Halo-phenylbenzoates and process for producing the same | |
US2556429A (en) | Diaryl sulfones and their manufacture | |
BE469797A (en) | ||
US1667480A (en) | Alkali fusion | |
US1711164A (en) | 2',4'-dihalogen-5'-methyl-ortho-benzoyl-benzoic acid and process of making the same | |
US2460291A (en) | Process for preparation of terpene alcohols | |
US2572563A (en) | Aromatic compositions and process of treating lactone material to prepare them | |
CH105937A (en) | Process for preparing cymene from monocyclic terpenes. | |
JPS6156218B2 (en) | ||
Teeple | LONG LEAF PINE OIL. | |
US2486808A (en) | Purification of phthalic anhydride | |
BE445146A (en) | Process for the production of polycondensation products containing carboxyl groups | |
US746703A (en) | Geraniol derivative. | |
BE650898A (en) | ||
BE443981A (en) | ||
US2080752A (en) | Esters of terpene and abietyl compounds and method of producing same | |
BE647037A (en) | ||
EP0279461A3 (en) | Immunological method for the determination of antigens or antibodies in biological fluids, and dyes therefor |