DE1111373B - Process for the production of foam bodies from carbamide resin foam - Google Patents
Process for the production of foam bodies from carbamide resin foamInfo
- Publication number
- DE1111373B DE1111373B DEC9963A DEC0009963A DE1111373B DE 1111373 B DE1111373 B DE 1111373B DE C9963 A DEC9963 A DE C9963A DE C0009963 A DEC0009963 A DE C0009963A DE 1111373 B DE1111373 B DE 1111373B
- Authority
- DE
- Germany
- Prior art keywords
- foam
- carbamide resin
- production
- bodies
- 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.)
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
-
- 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
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08J2361/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08J2361/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Verfahren zur Herstellung von Schaumkörpem aus Carbamidharzschaum Die Erfindung betrifft ein Verfahren zur Herstellung von Schaumkörpern aus bereits ausgehärtetem Carbamidharzschaum.Process for the production of foam bodies from carbamide resin foam The invention relates to a method for producing foam bodies from already hardened carbamide resin foam.
Für die Herstellung von Schaumkörpern aus Carbamidharzschaum sind eine Reihe von Verfahren gebräuchlich. Ein Verfahren besteht darin, den noch nicht ausgehärteten Schaum in eine Form zu pressen, die dem herzustellenden Körper entspricht. Gegebenenfalls kann dieser Schaumkörper noch vor dem Erhärten durch die gleichzeitige Anwendung von Druck und Wärme weiterhin verdichtet werden. For the production of foam bodies made from carbamide resin foam a number of procedures in use. One method is that not yet to press cured foam into a shape that corresponds to the body to be produced. If necessary, this foam body can even before hardening by the simultaneous Application of pressure and heat continue to be condensed.
Dieses Verfahren bedingt jedoch, daß der Schaum wenigstens kurz nach der Herstellung in die endgültige Form gebracht wird. Bei vielen Anwendungen von Schaum ist es jedoch erwünscht, daß die endgültige Formgebung getrennt von der Herstellung durchgeführt werden kann. Es ist ein Zweck der Erfindung, ein Verfahren zur Herstellung von Schaumkörpern aus Carbamidharzschaum zu schaffen, zu welchem bereits ausgehärteter Schaum verwendet werden kann. Gemäß der Erfindung wird dies dadurch erreicht, daß der ausgehärtete Schaum mit Wasser oder Wasserdampf behandelt und anschließend in an sich bekannter Weise bei Wärme-und Druckanwendung in die gewünschte Form gebracht wird.However, this process requires that the foam at least shortly after is brought into the final shape after manufacture. In many applications of Foam, however, it is desirable that the final shape be separate from manufacture can be carried out. It is a purpose of the invention to provide a method of manufacture to create foam bodies made of carbamide resin foam, which is already cured Foam can be used. According to the invention this is achieved in that the cured foam is treated with water or steam and then in In a manner known per se, brought into the desired shape with the application of heat and pressure will.
Es hat sich überraschend gezeigt, daß der Schaum durch Behandlung mit Wasser oder Wasserdampf erneut in einen Zustand übergeführt wird, der eine Verformung bei Druck- und Temperaturanwendung zuläßt. Es ist somit möglich, die Schaumherstellung von der abschließenden Bearbeitung örtlich und zeitlich zu trennen. It has surprisingly been found that the foam by treatment is converted again into a state of deformation with water or steam when applying pressure and temperature. It is thus possible to produce foam to be separated from the final processing in terms of location and time.
Bei der Durchführung des erfindungsgemäßen Verfahrens kann ein nach bekannten Verfahren hergestellter Carbamidharzschaum als Ausgangsmaterial verwendet werden. Dieser Schaum kann bereits eine Nachverdichtung erfahren haben. Ein bereits verdichteter Carbamidharzschaum kann ein Raumgewicht von etwa 12,5 kg/ms aufweisen. Ein derartiger Schaumkörper kann eine Verdichtung um den Faktor 5 erhalten haben. Ein Schaumkörper dieser Art wird nun durch Besprühen mit etwa 1 cm3 Wasser pro 1000 cm3. When carrying out the method according to the invention, a after known method produced carbamide resin foam is used as the starting material will. This foam may already have been compressed. One already compressed carbamide resin foam can have a density of about 12.5 kg / ms. Such a foam body may have been compressed by a factor of 5. A foam body of this type is now made by spraying with about 1 cm3 of water per 1000 cm3.
Schaum angefeuchtet. Die Anfeuchtung kann auch durch Lagerung in einer Wasserdampfatmosphäre erfolgen. Nach der Anfeuchtung kann eine Verdichtung um den Faktor 3 bis 5 erfolgen, wobei die Temperatur etwa 2500 C erreichen soll. Die Einwirkungsdauer der Nachverdichtungswerkzeuge kann 0,1 bis 3 Sekunden andauern.Foam moistened. The moistening can also be achieved by storage in a Take place in a water vapor atmosphere. After moistening, compaction can occur around the Factor 3 to 5 take place, whereby the temperature should reach about 2500 C. The duration of exposure the compression tools can last 0.1 to 3 seconds.
Zur Nachverdichtung des Kunststoffschaumes kann derselbe erst in Form von Blöcken oder als endlose Bahn hergestellt und diese Schaummasse dann in die zur jeweiligen Verformung und Nachverdichtung erwünschte Größe mechanisch unterteilt werden. Die zu verdichtenden Stücke werden in Preßformen entsprechender Dimensionen und Temperatur gebracht, die erwünschte Nachverdichtung durch Zusammenpressen auf ein vorgeschriebenes Endmaß durchgeführt und der nachverdichtete Kunstharzschaum nur so lange in der Form belassen, als der vorgesehenen Behandlungszeit entspricht. To compress the plastic foam, it can only be used in Form of blocks or as endless Bahn made and then this foam mass in mechanically subdivided the size required for the respective deformation and redensification will. The pieces to be compacted are in molds of appropriate dimensions and brought to temperature, the desired redensification by pressing together a prescribed final dimension carried out and the post-compressed synthetic resin foam leave it in the form only as long as corresponds to the intended treatment time.
Die Nachverdichtung kann absatzweise oder kontinuierlich erfolgen. Als Verformungswerkzeuge können geheizte Walzen oder geheizte Rollen verwendet werden sowie geheizte Formen, die den herzustellenden Körpern entsprechen. The redensification can be carried out intermittently or continuously. Heated rollers or heated rollers can be used as forming tools as well as heated molds that correspond to the bodies to be manufactured.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC9963A DE1111373B (en) | 1954-09-16 | 1954-09-16 | Process for the production of foam bodies from carbamide resin foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC9963A DE1111373B (en) | 1954-09-16 | 1954-09-16 | Process for the production of foam bodies from carbamide resin foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1111373B true DE1111373B (en) | 1961-07-20 |
Family
ID=7014659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEC9963A Pending DE1111373B (en) | 1954-09-16 | 1954-09-16 | Process for the production of foam bodies from carbamide resin foam |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1111373B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0464490A3 (en) * | 1990-06-29 | 1992-12-23 | Basf Aktiengesellschaft | Method for manufacturing three-dimensional objects of open cell, elastic thermosetting foam materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE523181C (en) * | 1926-12-04 | 1931-04-20 | Chemische Ind Ges | Process for the production of porous, meerschaum-like plastics from urea and formaldehyde |
| FR1021921A (en) * | 1950-07-11 | 1953-02-25 | Novacel Sa | Artificial sponge block shaping device |
-
1954
- 1954-09-16 DE DEC9963A patent/DE1111373B/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE523181C (en) * | 1926-12-04 | 1931-04-20 | Chemische Ind Ges | Process for the production of porous, meerschaum-like plastics from urea and formaldehyde |
| FR1021921A (en) * | 1950-07-11 | 1953-02-25 | Novacel Sa | Artificial sponge block shaping device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0464490A3 (en) * | 1990-06-29 | 1992-12-23 | Basf Aktiengesellschaft | Method for manufacturing three-dimensional objects of open cell, elastic thermosetting foam materials |
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