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DE1111373B - Process for the production of foam bodies from carbamide resin foam - Google Patents

Process for the production of foam bodies from carbamide resin foam

Info

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
Application number
DEC9963A
Other languages
German (de)
Inventor
Otto A Vieli
Dietert Klenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COGEPA COMMERCIA Ets
Original Assignee
COGEPA COMMERCIA Ets
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by COGEPA COMMERCIA Ets filed Critical COGEPA COMMERCIA Ets
Priority to DEC9963A priority Critical patent/DE1111373B/en
Publication of DE1111373B publication Critical patent/DE1111373B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36After-treatment
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/20Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08J2361/22Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08J2361/24Condensation 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)

PATENTANSPRÜCHE: 1. Verfahren zur Herstellung von Schaumkörpern aus bereits ausgehärtetem Carbamidharzschaum, dadurch gekennzeichnet, 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. PATENT CLAIMS: 1. Process for the production of foam bodies from already hardened carbamide resin foam, characterized in that the hardened Foam treated with water or steam and then in a known per se Way is brought into the desired shape with the application of heat and pressure. 2. Verfahren nach Anspruch, dadurch gekennzeichnet, daß der ausgehärtete Schaum in einer wasserfeuchten Atmosphäre gelagert wird. 2. The method according to claim, characterized in that the cured Foam is stored in a water-humid atmosphere. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Schaum mit 1 cm3 Wasser pro 1000 cm3 Schaummasse durch Besprühen befeuchtet wird. 3. The method according to claim 1, characterized in that the foam is moistened with 1 cm3 of water per 1000 cm3 of foam mass by spraying. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 523 181; deutsche Patentanmeldung St3081X/39a (bekanntgemacht am 27. 12. 1951); französische Patentschrift Nr. 1021 921; »Rubber Age«, Juni 1952, S. 356. Publications considered: German Patent No. 523 181; German patent application St3081X / 39a (published December 27, 1951); french U.S. Patent No. 1021,921; "Rubber Age," June 1952, p. 356.
DEC9963A 1954-09-16 1954-09-16 Process for the production of foam bodies from carbamide resin foam Pending DE1111373B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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