BE444796A - - Google Patents
Info
- Publication number
- BE444796A BE444796A BE444796DA BE444796A BE 444796 A BE444796 A BE 444796A BE 444796D A BE444796D A BE 444796DA BE 444796 A BE444796 A BE 444796A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- polymerization
- stabilized
- chlorobutadiene
- emulsion
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F36/14—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen
- C08F36/16—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated containing elements other than carbon and hydrogen containing halogen
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
Description
<EMI ID=1.1>
La présente invention concerne un procédé pour polymériser
<EMI ID=2.1>
Il est connu d'émulsionner le chloro-butadiène dans des
<EMI ID=3.1>
la. phase dispersive fermée. En peu de temps il se forme d'une telle émulsion de chloro-butadiène une émulsion ou une suspension de caoutchouc, dite latex de caoutchouc synthétique.
La présente invention améliore les propriétés des produits obtenus par un tel. procède. A l'opposé de la plupart des matières produites par polymérisation du butadiène, les produits conformes
à l'invention se distinguent par leur absence d'odeur.
Suivant l'invention, on exécute la polymérisation du
<EMI ID=4.1>
Suivant une autre caractéristique de la présente invention, le sulfure de carbone employé pour dissoudre le 2-chloro-butadiène 1-3 peut contenir du soufre dissous.
En exécutant le nouveau procédé il est utile d'opérer
<EMI ID=5.1>
<EMI ID=6.1>
micron. Avantageusement, on procède à la polymérisation dans un
<EMI ID=7.1>
Une fois la polymérisation terminée, il est utile de stabiliser la solution par addition de bisulfure de dibenzothiazol.
L'invention est illustrée par l'exemple suivant:
On mélange, en agitant énergiquement, 35 kilogrammes de :2-chloro-butadiène 1-3 fraîchement distillé, qui est débarrassé de toutes impuretés telles que par exemple l'acétaldéhyde, le
<EMI ID=8.1>
sulfure de carbone dans lequel est dissous 0,05 kilogramme de soufre. On -émulsionne cette solution dans 72 kilogrammes d'eau distillée, à 25[deg.], à laquelle on a ajouté 2 kilogrammes d'oléate
<EMI ID=9.1>
agitateur émaillé, dans un récipient en verre, matière céramique, aluminium ou fer Émaillé. Après quelques minutes il se forme une
<EMI ID=10.1>
n'atteignent même pas la grandeur d'un micron. On stabilise cette émulsion par addition d'un agent stabilisant connu, par exemple de
<EMI ID=11.1>
<EMI ID=12.1>
tage. On règle la polymérisation par refroidissement afin d'éviter <EMI ID=13.1>
est accomplie endéans une heure au plus tard, après quoi,on stabilise l'avulsion par addition de 0,7 kilogramme de bisulfure de dibenzothiazol. L'émulsion stabilisée peut ou bien servir de succédané du latex naturel, ou bien être précipitée par addition
<EMI ID=14.1>
REVENDICATIONS
<EMI ID=15.1>
<EMI ID = 1.1>
The present invention relates to a process for polymerizing
<EMI ID = 2.1>
It is known to emulsify chlorobutadiene in
<EMI ID = 3.1>
the. closed dispersive phase. In a short time, such a chlorobutadiene emulsion forms an emulsion or a rubber suspension, called a synthetic rubber latex.
The present invention improves the properties of the products obtained by such. process. Unlike most materials produced by the polymerization of butadiene, compliant products
to the invention are distinguished by their absence of odor.
According to the invention, the polymerization of
<EMI ID = 4.1>
According to another feature of the present invention, the carbon disulphide employed to dissolve 2-chlorobutadiene 1-3 may contain dissolved sulfur.
When performing the new process it is useful to operate
<EMI ID = 5.1>
<EMI ID = 6.1>
micron. Advantageously, the polymerization is carried out in a
<EMI ID = 7.1>
Once the polymerization is complete, it is useful to stabilize the solution by adding dibenzothiazol disulfide.
The invention is illustrated by the following example:
35 kilograms of freshly distilled 2-chlorobutadiene 1-3, which is free of all impurities such as for example acetaldehyde,
<EMI ID = 8.1>
carbon disulphide in which 0.05 kilogram of sulfur is dissolved. This solution is -emulsified in 72 kilograms of distilled water, at 25 [deg.], To which 2 kilograms of oleate have been added.
<EMI ID = 9.1>
enamelled stirrer, in a glass, ceramic, aluminum or enamelled iron container. After a few minutes a
<EMI ID = 10.1>
do not even reach the size of a micron. This emulsion is stabilized by adding a known stabilizing agent, for example
<EMI ID = 11.1>
<EMI ID = 12.1>
floor. The polymerization is adjusted by cooling in order to avoid <EMI ID = 13.1>
is accomplished within one hour at the latest, after which the avulsion is stabilized by the addition of 0.7 kilogram of dibenzothiazol disulfide. The stabilized emulsion can either serve as a substitute for the natural latex, or else be precipitated by addition
<EMI ID = 14.1>
CLAIMS
<EMI ID = 15.1>
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE230082X | 1941-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE444796A true BE444796A (en) |
Family
ID=5868553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE444796D BE444796A (en) | 1941-03-15 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE444796A (en) |
| CH (1) | CH230082A (en) |
| FR (1) | FR880093A (en) |
-
0
- BE BE444796D patent/BE444796A/fr unknown
-
1942
- 1942-03-05 CH CH230082D patent/CH230082A/en unknown
- 1942-03-10 FR FR880093D patent/FR880093A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR880093A (en) | 1943-03-12 |
| CH230082A (en) | 1943-12-15 |
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