DE947203C - Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers - Google Patents

Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers

Info

Publication number
DE947203C
DE947203C DEF12646A DEF0012646A DE947203C DE 947203 C DE947203 C DE 947203C DE F12646 A DEF12646 A DE F12646A DE F0012646 A DEF0012646 A DE F0012646A DE 947203 C DE947203 C DE 947203C
Authority
DE
Germany
Prior art keywords
cover layers
adhesion
kinds
polyurethane foams
rigid polyurethane
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
Application number
DEF12646A
Other languages
German (de)
Inventor
Dr Franzkarl Brochhagen
Dipl-Ing Peter Hoppe
Dr Hans-Willi Paffrath
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to DEF12646A priority Critical patent/DE947203C/en
Application granted granted Critical
Publication of DE947203C publication Critical patent/DE947203C/en
Expired legal-status Critical Current

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
    • C08J9/34—Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Description

AUSGEGEBEN AM 9. AUGUST 1956ISSUED AUGUST 9, 1956

F 12646 IVb 139bF 12646 IVb 139b

Voraussetzung für Sandwich-Konstruktionen, d. h. Verbindungen von Leichtstoffen mit hochfesten Deckschichten aus Metall, Kunststoff oder Sperrholz, ist eine ausreichende Haftung des Schaumstoffes auf den Deckschichten, um den gewünschten Stützeffekt zu erzielen. Wie bereits bekannt ist, muß bei der Ausfüllung von Hohlkörpern aus Metall, Kunststoff oder Holz der Schaumansatz so gewählt werden, daß ein verhältnismäßigRequirement for sandwich constructions, d. H. Connections of lightweight materials with high-strength outer layers made of metal, plastic or Plywood, sufficient adhesion of the foam to the face sheets is required to achieve the desired To achieve support effect. As is already known, must be used when filling hollow bodies made of metal, plastic or wood, the foam approach can be chosen so that a relatively

ίο hoher Innendruck entsteht, wodurch die bereits vorhandene Haftfähigkeit des treib- und reaktionsfähigen Polyurethan-Schaumstoffgemisches verbessert wird. Bei der Sandwich-Bauweise muß aber die Haftung des Schaumstoffes auf der Deckschicht größer sein als die innere Festigkeit (Zugfestigkeit) des Schaumstoffes, um vor allen Dingen ein Abheben der Deckschicht durch Beulen oder Knicken der Gesamtkonstruktion zu vermeiden.ίο high internal pressure is created, reducing the existing Adhesion of the blowing and reactive polyurethane foam mixture improved will. In the sandwich construction, however, the adhesion of the foam to the top layer must be must be greater than the internal strength (tensile strength) of the foam in order, above all, to lift off the top layer to avoid buckling or buckling of the overall structure.

Es wurde gefunden, daß neben der normalen, bekannten Grundierung von Blechen oder Sperrholz ao und der üblichen Methode, die Deckschicht durch Schmirgeln oder Sandstrahlen aufzurauhen, ein Vorstrich mit Reaktionsbeschleunigern für den Verschäumungsprozeß, wie tertiären Aminen, z. B. Estern von n-Diäthyläthanolaminen mit organischen Dicarbonsäuren (Esteraminen) oder Komplexsalzen von Metallen der 8. Gruppe des Periodischen Systems, wie Eisen-Acetylacetonat, vorteilhaft ist, so daß beim Schaumprozeß der Schaumstoff sich innig mit dem auf den Deckschichten gut haftendenIt has been found that in addition to the normal, known priming of sheet metal or plywood ao and the usual method of roughening the top layer by sandblasting or sandblasting Pre-coat with reaction accelerators for the foaming process, such as tertiary amines, e.g. B. Esters of n-diethylethanolamines with organic dicarboxylic acids (esteramines) or complex salts of metals of group 8 of the Periodic Table, such as iron acetylacetonate, is advantageous, so that during the foaming process the foam adheres intimately to that which adheres well to the outer layers

Vorstrich verankern kann. Dieses Verfahren. ist auf jeden Fall für sehr dünne Deckschichten, wie solche aus Leichtmetall und Stahl (Wandstärke 0,1 bis 0,4 mm) notwendig, da bei diesen Wandstärken diese Deckschichten ■ bei einer Sandstrahlung oder einem Schmirgelprozeß starke Verformungen der Deckschichten aufweisen können. Eine Entfettung metallischer Deckschichten ist auf jeden Fall notwendig. Can anchor the primer. This method. is definitely for very thin top layers, like those made of light metal and steel (wall thickness 0.1 to 0.4 mm) are necessary because of these wall thicknesses these top layers ■ in a sandblasting or an emery process strong deformation of the May have cover layers. A degreasing of metallic cover layers is necessary in any case.

Beispielexample

Auf der Innenseite der mit der Schaummasse zu verbindenden Deckschicht oder Deckschichthohlkonstruktion wird eine dünne Schicht aus Hexahydrodimethylanilin aufgespritzt. Der Schaumprozeß erfolgt dann anschließend oder nach gegebenenfalls längerer Lagerzeit.A thin layer of hexahydrodimethylaniline is placed on the inside of the cover layer or cover layer hollow structure to be connected to the foam mass sprayed on. The foaming process then takes place afterwards or if necessary longer storage time.

Claims (1)

Patentanspruch":Claim ": Verfahren zur Verbesserung der Haftfähig- ao keit von Polyurethan-Hartschaumstoffen . auf Deckschichten aller Art, dadurch gekennzeichnet, daß man die Deckschichten vor dem Aufbringen der Schaummasse mit Reaktionsbeschleunigern für den Verschäumungsprozeß vorpräpariert.Process for improving the adhesiveness of rigid polyurethane foams. on Cover layers of all kinds, characterized in that the cover layers are applied before application the foam mass prepared with reaction accelerators for the foaming process. ©509 659/301 2.56 (609 575 8.56)© 509 659/301 2.56 (609 575 8.56)
DEF12646A 1953-08-19 1953-08-20 Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers Expired DE947203C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF12646A DE947203C (en) 1953-08-19 1953-08-20 Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE761112X 1953-08-19
DEF12646A DE947203C (en) 1953-08-19 1953-08-20 Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers

Publications (1)

Publication Number Publication Date
DE947203C true DE947203C (en) 1956-08-09

Family

ID=25947794

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF12646A Expired DE947203C (en) 1953-08-19 1953-08-20 Process to improve the adhesion of rigid polyurethane foams to all kinds of cover layers

Country Status (1)

Country Link
DE (1) DE947203C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136084B (en) * 1957-09-06 1962-09-06 Fritz Hahn Dr Ing Electrode for systems to increase the electrical field strength in rooms
DE1176834B (en) * 1958-05-08 1964-08-27 Hans Guenter Moeller Process for the continuous production of rigid foam composite panels
DE1629286B1 (en) * 1966-05-28 1970-07-23 Benecke Gmbh J Process for the production of laminates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136084B (en) * 1957-09-06 1962-09-06 Fritz Hahn Dr Ing Electrode for systems to increase the electrical field strength in rooms
DE1176834B (en) * 1958-05-08 1964-08-27 Hans Guenter Moeller Process for the continuous production of rigid foam composite panels
DE1629286B1 (en) * 1966-05-28 1970-07-23 Benecke Gmbh J Process for the production of laminates

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