WO1992012196A1 - Procede pour la fabrication de mousses de polyurethane - Google Patents

Procede pour la fabrication de mousses de polyurethane Download PDF

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Publication number
WO1992012196A1
WO1992012196A1 PCT/EP1991/002483 EP9102483W WO9212196A1 WO 1992012196 A1 WO1992012196 A1 WO 1992012196A1 EP 9102483 W EP9102483 W EP 9102483W WO 9212196 A1 WO9212196 A1 WO 9212196A1
Authority
WO
WIPO (PCT)
Prior art keywords
parts
water
weight
polyol
silica gel
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.)
Ceased
Application number
PCT/EP1991/002483
Other languages
German (de)
English (en)
Inventor
Fridolin Becker
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.)
Sued-Bohl Daniel Garthe GmbH
Original Assignee
Sued-Bohl Daniel Garthe GmbH
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 Sued-Bohl Daniel Garthe GmbH filed Critical Sued-Bohl Daniel Garthe GmbH
Publication of WO1992012196A1 publication Critical patent/WO1992012196A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C08J9/02—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules
    • 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

Definitions

  • the present invention relates to a new process for the production of polyurethane foams (PUR foams) by polyaddition of polyols and polyisocyanates in the presence of water as blowing agent, the water being bound to finely divided silica having a large inner surface.
  • PUR foams polyurethane foams
  • rigid PU foams in particular integral PUR foams
  • a suitable polyol to which a few percent chlorofluorocarbons (CFCs) are mixed as blowing agents, with a suitable polyisocyanate immediately before processing, eg injection or pouring into a mold, intimately mixed in a mixing head in a stoichiometric ratio.
  • CFCs chlorofluorocarbons
  • a suitable polyisocyanate immediately before processing, eg injection or pouring into a mold, intimately mixed in a mixing head in a stoichiometric ratio.
  • the two components react exothermically with one another, as a result of which temperatures of 100-150 ° C., in particular 120-130 ° C., arise in the reaction mixture.
  • the CFC gasifies and generates foam bubbles in the mixture which are retained When the mixture has reacted and solidified
  • tempering the mold to, for example, 30-60 ° C. the evaporation of the CFCs is largely suppressed in the layers adjacent to the mold, so that little or no foam bubbles form in this area
  • the molded body is practically given a pore-free outer skin which merges more and more into the foam structure on the inside, as a result of which a high strength is achieved with a relatively high weight of the molded body. Since the solid outer skin is integrated with the foam body, such products are referred to as integral foam.
  • polyalkylene glycol ether As a polyol and to add water to this as a reaction component. By increasing the proportion of polyisocyanate beyond the stoichiometric content, part of the polyisocyanate reacts with the added water to form carbon dioxide and urea, the carbon dioxide serving as a blowing agent.
  • a carboxylic acid can be added instead of water, which reacts with polyisocyanates to form carbon dioxide and the corresponding acid amide.
  • EP 0 358 282 discloses a process for producing soft, flexible polyurethane foam in which water is added to the polyol component as a blowing agent and a soluble organic polyelectrolyte, for example polyacrylate.
  • a soluble organic polyelectrolyte for example polyacrylate.
  • water contained in the polyol can also be bound by stirring in anhydrous silica gel, as a powder or in the form of a paste with polyol.
  • anhydrous silica gel as a powder or in the form of a paste with polyol.
  • the materials used correspond to what has already been used for the production of the known rigid PU foams, ie the polyols used are predominantly longer polyester and polyether polyols, optionally also branched compounds with terminal hydroxyl groups.
  • the polyols used are usually mixtures with average molecular weights of 500 to 10,000, preferably approximately 1,000 to 2,000. Diamines can also contribute to chain extension. Polyols and chain extenders together have a hydroxyl number of about 300 to 500 for rigid foam and about 80 to 200 for flexible foam.
  • TDI 2,4- or 2,6-toluene diisocyanate
  • MDI 4,4'-methylene di-phenyl isocyanate
  • IPDI isophorone diisocyanate
  • polyisocyanate and 0.2-1.0 parts by weight of water are used per 100 parts by weight of polyol.
  • polyisocyanate and 0.2-1.0 parts by weight of water are used per 100 parts by weight of polyol.
  • the reaction between polyols and polyisocyanate is usually triggered by catalysts which are added to the polyol component.
  • catalysts which are added to the polyol component.
  • the Ka a1yRarnr p n_ known in the prior art for the production of PUR foams, in particular tertiary amines or organotin compounds can be used.
  • additional auxiliaries such as emulsifiers, foam stabilizers and pigments, and in particular for the production of non-flammable or flame-retardant polyurethane foams, are added.
  • the silica gel used is, in particular, a pyrogenic silica which, owing to its particularly high specific surface area of up to 200 m 2 / g, is able to adsorb water particularly well.
  • the binding strength of the water to the particles has to be taken into account, which mainly depends on the specific surface.
  • the inner surface should be about 1-200 ⁇ m / g in order to keep the admixed amount of silica gel low.
  • Housing, machine covers, vehicle body parts, planters, decorative pots, building claddings, ceiling claddings, even furniture, etc. can be produced from the hard PUR integral foams as produced according to the invention.
  • the material has excellent properties: small specific weight with good mechanical values, electrical insulation, temperature. SO1arinn. Great chemical resistance, dense surface, which allows subsequent painting and processing, provided that the foam is not already colored by the added pigments.
  • a specialty of the products according to the invention are foams which are self-extinguishing. They are particularly required for use in rail vehicles, cars, airplanes and products that are particularly endangered by public traffic, such as parts of telephone houses, letter boxes, etc.
  • Semi-hard PUR integral foams such as those produced according to the invention, can be used with fire protection equipment for road and rail vehicles, for aircraft and water vehicles and for applications which have special fire protection regulations, for example armrests, headrests, shock protection edges, covers, which have to have a certain elasticity, manufacture side panels, cover strips, seat cushions, office furniture, train luggage rack panels, door handle panels, etc.
  • 0.6 l of water are mixed with 0.15 kg of silica gel (Aerosil 200 from Degussa) to form a stiff paste and then into a mixture of 200 kg of polyol (Elastolit D 08- 002 oF, EPU-BASF, OH- Number 395), which contains 0.2 kg triethylamine and 0.13 kg tin (II) octoate, is added with intensive stirring.
  • silica gel Aderosil 200 from Degussa
  • polyol Elastolit D 08- 002 oF, EPU-BASF, OH- Number 395
  • a paste is produced from 22 kg of halogenated organic phosphoric acid ester, 1.5 kg of pigment powder and 30.0 kg of aluminum hydroxide powder by intimate mixing.
  • a suspension is prepared from 30 kg of polyol (Ela ⁇ tofoam I 4101, EPU-BASF, polyether polyol / diamine mixture, OH number 120) and 7.5 kg of aluminum hydroxide powder, and this 22.5 kg of the above-described flame retardant paste and 0. 2 kg of the water / silica gel paste described in Example 1 were added.
  • 0.035 kg triethylamine and 0.02 kg tin (II) octoate are added and the entire mixture is thoroughly mixed in a mixing kettle for 30 minutes to 2 hours.
  • the mixture is mixed with 7.5 kg MDI in a mixing head and immediately injected into the molds preheated to 60'C.
  • the molded pieces are removed from the mold after 3-15 minutes and have a dense outer skin of approximately 0.15-1.0 mm thick, which merges into the large-pore core zone over a region of 3-8 mm of a fine-pored intermediate layer. With a direct flame, these molded parts can be burnt, which however do not continue to burn when the flame is taken on.
  • a non-flame retardant, semi-hard PUR foam can be obtained from the following mixture:

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)

Abstract

L'objet de la présente invention est un nouveau procédé pour la fabrication de mousses de polyuréthane (mousses PUR) par polyaddition de polyols et de polyisocyanates en présence d'eau comme produit moussant, l'eau étant liée à des porteurs solides et à grains fins de grande surface interne.
PCT/EP1991/002483 1990-12-29 1991-12-20 Procede pour la fabrication de mousses de polyurethane Ceased WO1992012196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904042234 DE4042234C2 (de) 1990-12-29 1990-12-29 Verfahren zum Herstellen von Polyurethan-Schäumen
DEP4042234.8 1990-12-29

Publications (1)

Publication Number Publication Date
WO1992012196A1 true WO1992012196A1 (fr) 1992-07-23

Family

ID=6421687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/002483 Ceased WO1992012196A1 (fr) 1990-12-29 1991-12-20 Procede pour la fabrication de mousses de polyurethane

Country Status (2)

Country Link
DE (1) DE4042234C2 (fr)
WO (1) WO1992012196A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017117A1 (fr) * 1993-01-22 1994-08-04 Woodbridge Foam Corporation Polymere transforme en mousse et son procede de production

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10302198A1 (de) * 2003-01-20 2004-07-29 Flamro Brandschutz-Systeme Gmbh Brandschutzschaum und Verfahren zur Herstellung eines Brandschutzschaums
DE10335486B4 (de) * 2003-02-07 2005-12-15 Schrader, Helmut G. Verfahren zur Minderung von Schadstoffen und/oder geruchsemittierenden Substanzen in polymeren Werkstoffen
CN109111558A (zh) * 2018-02-13 2019-01-01 公安部天津消防研究所 一种低烟低毒阻燃硬质聚氨酯泡沫材料及制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753933A (en) * 1972-04-24 1973-08-21 Dow Chemical Co Polyurethane foams from solid foaming agents
GB1533989A (en) * 1976-08-11 1978-11-29 Dunlop Ltd Polyurethane foams
US4217422A (en) * 1977-01-31 1980-08-12 The Dow Chemical Company High resiliency polyurethane foams

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309861A1 (de) * 1973-02-28 1974-08-29 Bayer Ag Verfahren zur herstellung von schaumstoff-formkoerpern
DE2341294C3 (de) * 1973-08-16 1981-12-24 Bayer Ag, 5090 Leverkusen Polyolgemische
DE3742122A1 (de) * 1987-12-11 1989-06-22 Bayer Ag Verfahren zur herstellung von polyurethanschaumstoff-formteilen
DE68909870T2 (de) * 1989-11-08 1994-02-10 Shell Int Research Weiche flexible Polyurethanschaumstoffe, Verfahren zu deren Herstellung sowie in diesem Verfahren verwendbare Polyolzusammensetzung.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753933A (en) * 1972-04-24 1973-08-21 Dow Chemical Co Polyurethane foams from solid foaming agents
GB1533989A (en) * 1976-08-11 1978-11-29 Dunlop Ltd Polyurethane foams
US4217422A (en) * 1977-01-31 1980-08-12 The Dow Chemical Company High resiliency polyurethane foams

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017117A1 (fr) * 1993-01-22 1994-08-04 Woodbridge Foam Corporation Polymere transforme en mousse et son procede de production
US5422385A (en) * 1993-01-22 1995-06-06 Woodbridge Foam Corporation Isocyanate-based elastomer and process for production thereof
US5432204A (en) * 1993-01-22 1995-07-11 Woodbridge Foam Corporation Foamed polymer and process for production thereof
US5668189A (en) * 1993-01-22 1997-09-16 Woodbridge Foam Corporation Foamed polymer and process for production thereof

Also Published As

Publication number Publication date
DE4042234C2 (de) 1997-05-07
DE4042234C1 (fr) 1992-07-02

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