DE359061C - Process for dewatering phenol-formaldehyde resin compounds - Google Patents
Process for dewatering phenol-formaldehyde resin compoundsInfo
- Publication number
- DE359061C DE359061C DEW56344D DEW0056344D DE359061C DE 359061 C DE359061 C DE 359061C DE W56344 D DEW56344 D DE W56344D DE W0056344 D DEW0056344 D DE W0056344D DE 359061 C DE359061 C DE 359061C
- Authority
- DE
- Germany
- Prior art keywords
- phenol
- dewatering
- formaldehyde resin
- resin compounds
- water
- 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
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Description
Verfahren zur Entwässerung von Phenol-Formaldehyd-Harzmassen: Bei der Einwirkung von Formaldehyd auf Phenole in Gegenwart bekannter Vermittler erhält man in der Regel dickölige Zwsichenprodukte, die meistens noch gewisse m.echaiiisch oder emulsionsartig festgehaltene Wassermengen enthalten. Da diese :dicköligen Produkte sehr schlechte Wärmeleiter sind, so bietet die Verdampfung dieser Wassereinschlüsse um so größere Schwierigkeiten, j e mehr man von diesen dicköligen Produkten auf einmal zu entwässern hat. Bei Mengen von über ioo kg gelingt die Wasserverdampfung nicht mehr sicher selbst bei Anwendung besonders stark verminderten Luftdrucks.Process for the dehydration of phenol-formaldehyde resin masses: At the action of formaldehyde on phenols in the presence of known intermediaries as a rule, thick-oily intermediate products, which mostly still have a certain m.echaiian or contain emulsion-like retained amounts of water. Because these: thick oil products are very poor conductors of heat, so the evaporation of these water inclusions provides the greater the difficulty, the more one comes up with these thick oil products has to drain once. Water evaporation succeeds in quantities of over 100 kg no longer safe even when using particularly greatly reduced air pressure.
Es ist darum bereits vorgeschlagen worden, diese Zwischenprodukte mit Methyl- oder Äthylalkohol zu versetzen und durch Albdestillieren die Wasserreste zusammen mit einem Teil des zugesetzten Alkohols abzutreiben., worauf alsdann in offenen, luftdurchzogenen Trockenräumen die Harzmassen bei stufenweise erhöhter Wärme abdunsten und erhärten sollen. Auf 7 Prozent zurückgehaltenen Wassers sollen hierbei 2o Prozent Alkohol zugesetzt, hiervon io Prozent zurückgewonnen und die restlichen io Prozent durch Verdunstung in der Trockenkammer verloren gegeben werden. Hinzu kommen die Unkosten für die Rückgewinnung trockenen Alkohols aus dem stark verwässerten Destillat.It has therefore already been proposed to use these intermediates to add methyl or ethyl alcohol and by distilling the water residues to be aborted together with part of the added alcohol., whereupon then in in open, air-filled drying rooms, the resin masses are gradually increased Heat should evaporate and harden. On 7 percent retained water should in this case 2o percent alcohol added, of which 10 percent recovered and the remaining 10 percent lost through evaporation in the drying chamber. Add to this the expense of recovering dry alcohol from the stark diluted distillate.
Es wurde nun gefunden, da.ß man aus einem dicköligen Phenol-Formaldehyd-Harz mit etwa 7 Prozent zurückgehaltenem Wasser durch Zugabe von etwa 7 Prozent Propylalkohol und Umrühren das Wasser praktisch vollkommen ausziehen und dann einfach durch Abgießen beseitigen kann. Hierbei werden auch gleichzeitig noch wasserlösliche Vermittlersubstanzen und rötlichbraun. färbende Substanzen unbekannten Charakters entfernt.It has now been found that a thick oil phenol-formaldehyde resin can be used with about 7 percent retained water by adding about 7 percent propyl alcohol and stirring the water practically completely draw out and then simply by pouring it off can eliminate. At the same time, water-soluble mediator substances are also used and reddish brown. staining substances of unknown character removed.
Die so erhaltene dickölige Harzmasse bildet einen vorzüglichen, mit Hochglanz wie Firnis eintrocknenden Emaillelack, der besonders in Heißtrockenräumen vorzüglich eintrocknet und auf Metallen eine durchsichtige Glasur hinterläßt.The thick oil resin composition obtained in this way forms an excellent, with High gloss like varnish drying enamel lacquer, especially in hot drying rooms Dries perfectly and leaves a transparent glaze on metals.
Die dickölige Harzmasse kann ferner in offene oder nicht dicht verschlossene Formen gegossen und in diesen Formen durch allmähliches Erwärmen bis schließlich auf etwa i35° C gehärtet werden.The thick oily resin composition can also be open or not tightly closed Molds and poured into these molds by gradually heating them until finally hardened to about i35 ° C.
Selbst wenn man die nur 7 Prozent ausmachende Menge des Propylalkohols einfach verdunsten lassen und nicht wiedergewinnen würde, stellt sich das Verfahren schon genügend wohlfeil. Die eigentümliche Eigenschaft des Propylalkohols, aus wäßrigen Lösungen sehr leicht restlos aussalzbar zu sein, ermöglicht jedoch eine nahezu verlustlose Wiederge"i"innung des Propylalkohols aus den Dünsten der Trockenkammern mit Hilfe der bekannten Kataraktapparate.Even if you only use the 7 percent amount of propyl alcohol would simply evaporate and not recover, the process arises already cheap enough. The peculiar property of propyl alcohol, However, it makes it possible to be very easily salted out completely from aqueous solutions an almost lossless recovery of the propyl alcohol from the vapors of the Drying chambers with the help of the well-known cataract apparatus.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW56344D DE359061C (en) | 1920-10-01 | 1920-10-01 | Process for dewatering phenol-formaldehyde resin compounds |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW56344D DE359061C (en) | 1920-10-01 | 1920-10-01 | Process for dewatering phenol-formaldehyde resin compounds |
Publications (1)
Publication Number | Publication Date |
---|---|
DE359061C true DE359061C (en) | 1922-09-18 |
Family
ID=7605063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEW56344D Expired DE359061C (en) | 1920-10-01 | 1920-10-01 | Process for dewatering phenol-formaldehyde resin compounds |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE359061C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1096029B (en) * | 1955-08-09 | 1960-12-29 | Hooker Chemical Corp | Process for the production of deformable synthetic resin compositions |
-
1920
- 1920-10-01 DE DEW56344D patent/DE359061C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1096029B (en) * | 1955-08-09 | 1960-12-29 | Hooker Chemical Corp | Process for the production of deformable synthetic resin compositions |
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