DE1273790B - Process for the production of a powder from coarse chlorinated polyether based on pentaerythritol - Google Patents
Process for the production of a powder from coarse chlorinated polyether based on pentaerythritolInfo
- Publication number
- DE1273790B DE1273790B DE1961G0031865 DEG0031865A DE1273790B DE 1273790 B DE1273790 B DE 1273790B DE 1961G0031865 DE1961G0031865 DE 1961G0031865 DE G0031865 A DEG0031865 A DE G0031865A DE 1273790 B DE1273790 B DE 1273790B
- Authority
- DE
- Germany
- Prior art keywords
- powder
- pentaerythritol
- chlorinated polyether
- coarse
- polyether based
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/124—Treatment for improving the free-flowing characteristics
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08J2371/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08J2371/12—Polyphenylene oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Description
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
Int. CL:Int. CL:
B 29bB 29b
Deutsche Kl.: 39 al -1/12 German class: 39 al -1/12
Nummer: 1273 790Number: 1273 790
Aktenzeichen: P 12 73 790.5-16 (G 31865) File number: P 12 73 790.5-16 (G 31865)
Anmeldetag: 21. März 1961Filing date: March 21, 1961
Auslegetag: 25. Juli 1968Opening day: July 25, 1968
Die Erfindung betrifft ein Verfahren zur Herstellung eines Pulvers aus grobstückigem chloriertem Polyäther auf der Basis von Pentaerythrit.The invention relates to a process for the production of a powder from coarse chlorinated Polyether based on pentaerythritol.
Thermoplastische Kunststoffe lassen sich schwer zu Pulvern vermählen, da die hier auftretende Reibungswärme den Kunststoff erweicht. Man muß deshalb vor oder während der Mahlung für starke Abkühlung des Kunststoffes sorgen, was z. B. durch Zuhilfenahme von flüssigem Stickstoff erreicht wird. Dieses Verfahren ist teuer. Außerdem wird nicht immer die manchmal erforderliche feinste Körnung erreicht.Thermoplastic plastics are difficult to grind into powders because of the frictional heat that occurs here softens the plastic. You have to cool down before or during the grinding of the plastic, what z. B. is achieved with the aid of liquid nitrogen. This Procedure is expensive. In addition, the finest grain size sometimes required is not always achieved.
Aus der britischen Patentschrift 571814 ist ein Verfahren bekannt, wonach Polyäthylen zwecks Gewinnung eines feinen Pulvers in geeigneten Lösungsmitteln heiß gelöst wird. Beim Erkalten fällt das Polyäthylen als feines Pulver aus. Das Verfahren ist aber nur für solche Kunststoffe brauchbar, deren Temperaturkoeffizient der Löslichkeit groß ist. In vielen Fällen erhält man auch kein feines Pulver, sondern fladen- oder kuchenartige Produkte.From British patent 571814 is a Process known, according to which polyethylene for the purpose of obtaining a fine powder in suitable solvents is dissolved hot. When it cools down, the polyethylene precipitates as a fine powder. The procedure is but only useful for plastics with a high temperature coefficient of solubility. In In many cases, you don't get a fine powder, but flat or cake-like products.
Nach der Erfindung wird ein Pulver aus grobstückigem chloriertem Polyäther auf der Basis von Pentaerythrit dadurch hergestellt, daß der Kunststoff in heißem Tetrahydronaphthalin gelöst, sodann die erhaltene Lösung abgekühlt, die entstehende Gallerte einem Preßdruck unterworfen und dabei die Hauptmenge an Lösungsmittel abgepreßt wird und schließlich die Restmenge an Lösungsmittel nach üblichen Verfahren unterhalb des Erweichungspunktes des chlorierten Polyäthers entfernt wird.According to the invention, a powder of coarse chlorinated polyether based on Pentaerythritol produced by dissolving the plastic in hot tetrahydronaphthalene, then the The solution obtained is cooled, the resulting jelly is subjected to a compression pressure and the bulk of it is pressed off of solvent and finally the remaining amount of solvent according to the usual Process below the softening point of the chlorinated polyether is removed.
Der Preßdruck kann z. B. durch Druckluft, Zentrifugen, Walzen oder Etagenpressen ausgeübt werden. Das nach dem erfindungsgemäßen Verfahren erhaltene Pulver hat eine gleichmäßige Korngröße von z. B. 5 bis 10 μ.The pressure can be, for. B. be exercised by compressed air, centrifuges, rollers or multi-stage presses. The powder obtained by the process according to the invention has a uniform grain size of z. B. 5 to 10 µ.
Wesentlich für das Gelingen des Verfahrens ist die Auswahl von Tetrahydronaphthalin als Lösungsmittel, das in der Wärme dispergierend und lösend, nach dem Abkühlen aber dispergierend und nicht mehr lösend wirkt.The selection of tetrahydronaphthalene as the solvent is essential for the success of the process, that disperses and dissolves in the heat, but after cooling it disperses and no longer has a releasing effect.
Das eingesetzte Lösungsmittel kann praktisch vollständig wiedergewonnen und im Kreislauf geführt werden.Virtually all of the solvent used can be recovered and recycled will.
20 Gewichtsteile eines Granulats aus einem chlorierten Polyäther auf Basis Pentaerythrit werden in
80 Gewichtsteilen Tetrahydronaphthalin bei etwa Verfahren zur Herstellung eines Pulversaus grobstückigem chloriertem Polyäther
auf der Basis von Pentaerythrit20 parts by weight of a granulate made of a chlorinated polyether based on pentaerythritol are converted into 80 parts by weight of tetrahydronaphthalene in a process for producing a powder from coarse chlorinated polyether
based on pentaerythritol
Anmelder:Applicant:
Th. Goldschmidt Aktiengesellschaft,Th. Goldschmidt Aktiengesellschaft,
4300 Essen, Goldschmidtstr. 1004300 Essen, Goldschmidtstr. 100
Als Erfinder benannt:
Dipl.-Ing. Erich Pietschmann,
6800 Mannheim-RheinauNamed as inventor:
Dipl.-Ing. Erich Pietschmann,
6800 Mannheim-Rheinau
160° C gelöst und dem Spalt eines Zweiwalzen-Walzwerkes zugeführt, die bei enggestellten Walzen das Tetrahydronaphthalin aus der durch Abkühlen an der Luft entstandenen Gallerte abquetscht. Das Tetrahydronaphthalin läuft unten ab. Von den Walzen wird ein sehr dünnes weißes Fell lockeren Zusammenhanges abgestreift, das sehr leicht zu feinen Krümeln zerreibbar ist, die etwa 50% Tetrahydronaphthalin enthalten. 60 Gewichtsteile, d. h. 75°/o des eingesetzten Tetrahydronaphthalins, werden also durch Abquetschen wiedergewonnen, der Rest durch Erwärmung bei gleichzeitigem Zerreiben oder durch Bewegung der feuchten Krümel. Zurück bleibt ein feines, gleichmäßiges Pulver mit einer Korngröße von 5 bis 10 μ.160 ° C and the gap of a two-roll rolling mill fed, the tetrahydronaphthalene from the by cooling at the close-set rollers Air jelly is squeezed off. The tetrahydronaphthalene drains from below. From the reels a very thin white fur is stripped off loosely, which crumbles very easily is friable, which contain about 50% tetrahydronaphthalene. 60 parts by weight, d. H. 75 ° / o of the amount used Tetrahydronaphthalene is recovered by squeezing it off, the rest by warming it up at the same time grating or moving the moist crumbs. One remains behind fine, uniform powder with a grain size of 5 to 10 μ.
Claims (1)
Britische Patentschrift Nr. 571 814.Considered publications:
British Patent No. 571,814.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1317719D FR1317719A (en) | 1961-03-21 | ||
| DE1961G0031865 DE1273790B (en) | 1961-03-21 | 1961-03-21 | Process for the production of a powder from coarse chlorinated polyether based on pentaerythritol |
| GB881962A GB943718A (en) | 1961-03-21 | 1962-03-07 | A method of reducing a synthetic thermoplastic to a powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1961G0031865 DE1273790B (en) | 1961-03-21 | 1961-03-21 | Process for the production of a powder from coarse chlorinated polyether based on pentaerythritol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1273790B true DE1273790B (en) | 1968-07-25 |
Family
ID=7124325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1961G0031865 Pending DE1273790B (en) | 1961-03-21 | 1961-03-21 | Process for the production of a powder from coarse chlorinated polyether based on pentaerythritol |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1273790B (en) |
| FR (1) | FR1317719A (en) |
| GB (1) | GB943718A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342624A (en) * | 1989-02-16 | 1994-08-30 | British Technology Group Ltd. | Dispensing device |
| CN109176960A (en) * | 2018-09-29 | 2019-01-11 | 安徽蓝通科技股份有限公司 | Plastic grinder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB571814A (en) * | 1942-03-17 | 1945-09-11 | Telegraph Constr & Maintenance | Process for the preparation of polymerised hydrocarbons in powder form |
-
0
- FR FR1317719D patent/FR1317719A/fr not_active Expired
-
1961
- 1961-03-21 DE DE1961G0031865 patent/DE1273790B/en active Pending
-
1962
- 1962-03-07 GB GB881962A patent/GB943718A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB571814A (en) * | 1942-03-17 | 1945-09-11 | Telegraph Constr & Maintenance | Process for the preparation of polymerised hydrocarbons in powder form |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1317719A (en) | 1963-05-08 |
| GB943718A (en) | 1963-12-04 |
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