DE3837267A1 - Process for the production of mouldings from flexible integral polyurethane foam - Google Patents

Process for the production of mouldings from flexible integral polyurethane foam

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Publication number
DE3837267A1
DE3837267A1 DE19883837267 DE3837267A DE3837267A1 DE 3837267 A1 DE3837267 A1 DE 3837267A1 DE 19883837267 DE19883837267 DE 19883837267 DE 3837267 A DE3837267 A DE 3837267A DE 3837267 A1 DE3837267 A1 DE 3837267A1
Authority
DE
Germany
Prior art keywords
component
blowing agent
added
production
methylene chloride
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.)
Withdrawn
Application number
DE19883837267
Other languages
German (de)
Inventor
Reinhard Dipl Chem Dr Kraessig
Herbert Dipl Chem Dr Schaper
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.)
Phoenix AG
Original Assignee
Phoenix 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 Phoenix AG filed Critical Phoenix AG
Priority to DE19883837267 priority Critical patent/DE3837267A1/en
Publication of DE3837267A1 publication Critical patent/DE3837267A1/en
Withdrawn legal-status Critical Current

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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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/143—Halogen containing compounds
    • 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

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)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention relates to a process for the production of mouldings from flexible integral polyurethane foam (for example headrests, armrests and flexible rear spoilers) having a density of from 0.3 to 0.8 g/cm<3>, in particular from 0.3 to 0.6 g/cm<3>, by foaming the polyol component (component A) with the isocyanate component (component B) in the presence of a blowing agent (component C). The essential feature of this invention is that the blowing agent is added under high pressure in an amount of from 0.5 to 5% by weight, based on the total composition comprising components A, B and C, the blowing agent being added by one of three process variants: Variant I: The blowing agent is added to the component A just before atomisation. Variant II: The blowing agent is added to the component B just before atomisation. Variant III: The blowing agent is introduced into the mixing head during atomisation.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Formkörpern aus Polyurethan-Weich-Integralschaum gemäß Oberbegriff des Anspruchs 1.The invention relates to a method for producing Shaped bodies made of polyurethane soft integral foam according to Preamble of claim 1.

Bezüglich der Herstellung von Formkörpern aus PU-Integralschaum gibt es zahlreiche veröffentlichte Arbeiten, wobei nun die bisherigen Entwicklungsarbeiten der Anmelderin auf diesem Gebiet im Rahmen einer Übersicht aufgeführt werden.Regarding the production of molded articles from PU integral foam there are numerous published works, whereby now the the applicant's previous development work in this area be listed in an overview.

DE-OS 24 61 521, DE-OS 27 14 518, DE-OS 27 18 173, DE-OS 29 22 769,
DE-PS 26 12 896, DE-PS 28 19 037, DE-PS 32 26 818.DE-OS 24 61 521, DE-OS 27 14 518, DE-OS 27 18 173, DE-OS 29 22 769,
DE-PS 26 12 896, DE-PS 28 19 037, DE-PS 32 26 818.

Bei der Herstellung von PU-Weich-Integralschaumartikeln beobachtet man öfters die Bildung einer porösen bzw. pickeligen Oberfläche, u. a. bedingt durch den hohen Treibmittelgehalt.In the production of PU soft integral foam articles one often observes the formation of a porous or pimply Surface, u. a. due to the high blowing agent content.

Aufgabe der Erfindung ist es daher, PU-Weich-Integralschaumartikel herzustellen, die eine glatte lackierfähige Oberfläche aufweisen. Zudem sollen die A- und B-Komponenten lagerungs- und alterungsbeständiger sein. Gelöst wird diese Aufgabe durch das Kennzeichen des Anspruchs 1.The object of the invention is therefore to provide PU soft integral foam articles produce that have a smooth paintable surface. In addition, the A and B components should be stored and be more resistant to aging. This task is solved by the characterizing part of claim 1.

Im folgenden werden zwei Versuchsreihen aufgeführt, wobei zunächst einmal die allgemeinen Versuchsbedingungen genannt werden.Two test series are listed below, whereby first of all the general test conditions will.

A-Komponente:
treibmittelfreie Polyolmischung (Gew.-T)
verzweigter Polyether (MG 4800): 100,0
Butandiol-1,4: 11,0
Triethylendiamin (33%ig in Dipropylenglycol gelöst): 2,0
Schwarzpaste (25%ig, Ruß dispergiert in Polyol): 5,6A component:
blowing agent-free polyol mixture (parts by weight)
branched polyether (MW 4800): 100.0
1,4-butanediol: 11.0
Triethylenediamine (33% dissolved in dipropylene glycol): 2.0
Black paste (25%, carbon black dispersed in polyol): 5.6

B-Komponente:
MDI-Präpolymer mit Tripropylenglycol (MDI = 4,4′-Methylendiphenyldiisocyanat)B component:
MDI prepolymer with tripropylene glycol (MDI = 4,4′-methylene diphenyl diisocyanate)

C-Komponente:
Methylenchlorid/Trichlorfluormethan (1 : 3)C component:
Methylene chloride / trichlorofluoromethane (1: 3)

Rohstofftemperatur:
A-Komponente: 25-27°C
B-Komponente: 30-34°C
C-Komponente: RT (ca. 21°C)Raw material temperature:
A component: 25-27 ° C
B component: 30-34 ° C
C component: RT (approx. 21 ° C)

Form:
Heckspoiler (schräg aufgestellt)
Formtemperatur: 40°C
Formvolumen: 3,6 l
Formstandzeit: 8 minShape:
Rear spoiler (inclined)
Mold temperature: 40 ° C
Mold volume: 3.6 l
Mold life: 8 min

Anlage:
Hochdruck-RIM-Anlage
(Das Treibmittel wird in den Polyolstrom vor der Verdüsung mit Hochdruck einge­ spritzt zur Ververmischung.)
Förderleistung: 340 g/sec. Investment:
High pressure RIM system
(The blowing agent is injected into the polyol stream before spraying at high pressure for mixing.)
Delivery rate: 340 g / sec.

Versuchsreihe 1 Test series 1

Ziel: Untersuchung des Einflusses des Mengenanteils an C-Komponente auf die Oberfläche Objective: To study the influence of the amount of C component on the surface

Natürliche Luftbeladung der A-Komponente (< 5 Vol.-%)
Einschußzeit: 5,3 bis 5,5 sec
Dichte des Artikels: 0,46 g/cm³Natural air loading of the A component (<5% by volume)
Shot time: 5.3 to 5.5 sec
Density of the item: 0.46 g / cm³

Versuchsreihe 2 Test series 2

Ziel: Untersuchung des Einflusses anderer Größen (Einschußzeit, Luftbeladung, Dichte) auf die Oberfläche Objective: To investigate the influence of other quantities (shot time, air load, density) on the surface

Mischungsverhältnis von A : B : C in Gew.-T (100 : 55 : 2,7)
C-Komponente: 1,7 Gew.-% (bezogen auf Gesamtmischung).Mixing ratio of A: B: C in parts by weight (100: 55: 2.7)
C component: 1.7% by weight (based on the total mixture).

GesamtergebnisOverall result

  • 1) Bei einem Anteil von Treibmitteln (C-Komponente) von 0,5 bis 5 Gew.-% erhält man eine glatte bzw. nahezu glatte Artikeloberfläche, wobei man die besten Oberflächeneigenschaften bei einem Anteil von kleiner 2 Gew.-% an Treibmittel erhält. Dies ist überraschend, da man bisher davon ausgegangen ist, daß bei der Herstellung von Artikeln aus PU-Weich-Integralschaum ein Anteil von 10 bis 15 Gew.-% Treibmittel erforderlich ist, um die gewünschte Dichte (insbesondere < 0,6 g/cm³) und Lackierbarkeit der Oberfläche zu erreichen. Geringere Mengen (< 10 Gew.-%) an Treibmitteln ist bisher nur bei der Herstellung von Formkörpern aus Polyurethan-Integralschaum mit einer Dichte von 0,9 g/cm³ zugesetzt worden (DE-PS 28 19 037).1) With a proportion of blowing agents (C component) of 0.5 to 5% by weight gives a smooth or almost smooth article surface, being the best Surface properties with a share of smaller Receives 2 wt .-% of blowing agent. This is surprising since it was previously assumed that the Manufacture of articles made of PU soft integral foam a proportion of 10 to 15% by weight of blowing agent is required to achieve the desired density (in particular <0.6 g / cm³) and paintability of the surface to reach. Smaller amounts (<10% by weight) So far, blowing agents have only been used in the production of Molded bodies made of integral polyurethane foam with a Density of 0.9 g / cm³ was added (DE-PS 28 19 037).
  • 2) Durch Variation der Einschußzeit kann bei hoher Luftbeladung die Oberflächeneigenschaft verbessert werden. Gleichzeitig wird die Dichte weiter erniedrigt.2) By varying the shot time at high Air loading improves the surface properties will. At the same time, the density is further reduced.
  • 3) Durch die separate Treibmittelzudosierung sind die A- und B-Komponenten lagerungs- und alterungsbeständiger.3) The separate propellant metering means that A and B components more storage and aging resistant.

Claims (9)

1. Verfahren zum Herstellen von Formkörpern aus Polyurethan- Weich-Integralschaum (z. B. Kopfstützen, Armlehnen, weiche Heckspoiler) mit einer Dichte von 0,3 bis 0,8 g/cm³, insbesondere von 0,3 bis 0,6 g/cm³, durch Verschäumen der Polyolkomponente (A-Komponente) mit der Isocyanat­ komponente (B-Komponente) in Gegenwart eines Treibmittels (C-Komponente), dadurch gekennzeichnet, daß das Treibmittel unter Hochdruck in einer Menge von 0,5 bis 5 Gew.-% bezogen auf Gesamtmasse von A-, B- und C-Komponente zugesetzt wird, wobei die Treibmittelbeigabe nach einer der drei Verfahrensvarianten erfolgt: Variante I:
Das Treibmittel wird der A-Komponente kurz vor der Verdüsung beigegeben.Variante II:
Das Treibmittel wird der B-Komponente kurz vor der Verdüsung beigegeben.Variante III:
Das Treibmittel wird bei der Verdüsung additiv im Mischkopf beigegeben.1. Process for the production of moldings from polyurethane soft integral foam (z. B. headrests, armrests, soft rear spoiler) with a density of 0.3 to 0.8 g / cm³, in particular from 0.3 to 0.6 g / cm³, by foaming the polyol component (A component) with the isocyanate component (B component) in the presence of a blowing agent (C component), characterized in that the blowing agent under high pressure in an amount of 0.5 to 5 wt. % based on the total mass of A, B and C components is added, the blowing agent being added using one of the three process variants: Variant I:
The blowing agent is added to the A component shortly before spraying. Version II:
The blowing agent is added to the B component shortly before atomization. Version III:
The blowing agent is added to the mixing head during spraying. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Treibmittel in einer Menge von 1 bis 2 Gew.-% zugesetzt wird.2. The method according to claim 1, characterized in that the blowing agent is added in an amount of 1 to 2% by weight becomes. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Treibmittel Halogenkohlenwasserstoffe eingesetzt werden.3. The method according to claim 1 or 2, characterized in that halogenated hydrocarbons are used as blowing agents will. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß als Treibmittel Methylenchlorid eingesetzt wird.4. The method according to claim 3, characterized in that methylene chloride is used as blowing agent. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß dem Methylenchlorid Fluor-Chlor-Kohlenwasserstoffe beigemischt werden.5. The method according to claim 4, characterized in that the methylene chloride fluorine-chlorohydrocarbons be added. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß als Treibmittel ein Gemisch aus Methylenchlorid und Trichlorfluormethan im Verhältnis 1 : 3 eingesetzt wird.6. The method according to claim 5, characterized in that a mixture of methylene chloride and Trichlorofluoromethane used in a ratio of 1: 3 becomes. 7. Verfahren nach Anspruch 1oder 2, dadurch gekennzeichnet, daß als Treibmittel Benzin, Ester und/oder Ether eingesetzt werden.7. The method according to claim 1 or 2, characterized in that as a blowing agent gasoline, ester and / or ether be used. 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die A-Komponente eine natürliche Lufbeladung (< 5 Vol.-%) aufweist.8. The method according to any one of claims 1 to 7, characterized characterized in that the A component is a natural Air load (<5 vol .-%) has. 9. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die A-Komponente eine Luftbeladung (< 5 Vol.-%) aufweist.9. The method according to any one of claims 1 to 7, characterized characterized in that the A component is an air load (<5% by volume).
DE19883837267 1987-11-07 1988-11-03 Process for the production of mouldings from flexible integral polyurethane foam Withdrawn DE3837267A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883837267 DE3837267A1 (en) 1987-11-07 1988-11-03 Process for the production of mouldings from flexible integral polyurethane foam

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737925 1987-11-07
DE19883837267 DE3837267A1 (en) 1987-11-07 1988-11-03 Process for the production of mouldings from flexible integral polyurethane foam

Publications (1)

Publication Number Publication Date
DE3837267A1 true DE3837267A1 (en) 1989-05-18

Family

ID=25861585

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883837267 Withdrawn DE3837267A1 (en) 1987-11-07 1988-11-03 Process for the production of mouldings from flexible integral polyurethane foam

Country Status (1)

Country Link
DE (1) DE3837267A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064236A1 (en) * 2002-01-31 2003-08-07 Hennecke Gmbh Method for producing polyurethane foam with a variable cell structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064236A1 (en) * 2002-01-31 2003-08-07 Hennecke Gmbh Method for producing polyurethane foam with a variable cell structure

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