EP0918808A1 - Procede de fabrication de revetements structures en mousse de polyurethane - Google Patents

Procede de fabrication de revetements structures en mousse de polyurethane

Info

Publication number
EP0918808A1
EP0918808A1 EP97936703A EP97936703A EP0918808A1 EP 0918808 A1 EP0918808 A1 EP 0918808A1 EP 97936703 A EP97936703 A EP 97936703A EP 97936703 A EP97936703 A EP 97936703A EP 0918808 A1 EP0918808 A1 EP 0918808A1
Authority
EP
European Patent Office
Prior art keywords
foamable mixture
layer
mixture
foamable
foam
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Withdrawn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
EP97936703A
Other languages
German (de)
English (en)
Inventor
Fatima Vohs
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19632987A external-priority patent/DE19632987C1/de
Application filed by Individual filed Critical Individual
Publication of EP0918808A1 publication Critical patent/EP0918808A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means

Definitions

  • the invention relates to a method for producing decorative, three-dimensionally structured coatings made of polyurethane foam (PUR show) on a base.
  • PUR show polyurethane foam
  • Polyurethane foams are based on three components
  • the polyurethane is obtained by polyaddition from dihydric and / or higher alcohols (B) and isocyanates and / or prepolymers with terminal isocyanate groups (A).
  • Auxiliaries (C) are known catalysts, stabilizers, color pigments, blowing agents, surfactants, emulsifiers, foam stabilizers, flame retardants,
  • Polyurethane foam is either based on the chemical blowing process based on the isocyanate-water reaction, which supplies gaseous CO 2 as blowing gas, or on the physical blowing process with low-boiling blowing agent components such as halogenated hydrocarbons and / or volatile, non-halogenated Hydrocarbons such as pentane, cyclopentane, propane, isobutane, dimethyl ether are produced.
  • low-boiling blowing agent components such as halogenated hydrocarbons and / or volatile, non-halogenated Hydrocarbons such as pentane, cyclopentane, propane, isobutane, dimethyl ether are produced.
  • the raw materials are commercially available as a one- or two-component mixture.
  • Diphenylmethane-4,4'-diisocyanate (MDI) or 2,4- or 2,6-toluenediisocyanate is preferably used as isocyanate for the production of PUR foam.
  • Harder PUR foams are obtained from mixtures foamed with physical blowing agents based on polyols and isocyanates.
  • PUR foam is processed by molded foams in closed molds into finished products or, in construction, used as assembly foam for filling cavities and fastening components, because PUR statu nascendi is sticky at the start of crosslinking and is good on many materials, such as wood , Metal, concrete, masonry.
  • DE-OS 21 12 397 describes a plastic based on polyurethane foam, which can be used as a decorative house plaster for interior and exterior walls in the form of foam wall panels.
  • JP 54083524 A discloses foamable paint coatings containing a foamable resin, such as foamable polystyrene, foamable polyethylene or foamable polyurethane and a colorant and a binder, in particular a plastic such as PVC, polyacrynitrile or polymethacrylate, to which organic or inorganic blowing agents, such as azodicarbonamide or Na riu bicarbonate are known to be used to paint pictures that after drying at room temperature on a Temperature of 90 to 200 ° C depending on the plastic for foaming.
  • a foamable resin such as foamable polystyrene, foamable polyethylene or foamable polyurethane
  • a colorant such as PVC, polyacrynitrile or polymethacrylate
  • organic or inorganic blowing agents such as azodicarbonamide or Na riu bicarbonate are known to be used to paint pictures that after drying at room temperature on a Temperature of 90 to 200 ° C depending on the plastic for foaming
  • foamable paint coats are not suitable for the production of large-scale house plasters, since they cannot be treated with heat up to 200 ° C in order to obtain a foam.
  • the invention has for its object to find further advantageous fields of use for PUR foam, in particular for foamable PUR mixtures packaged as one- or two-component systems, optionally with physical blowing agents in pressure containers, such as spray cans, for producing PUR foam in hard or semi-hard setting.
  • the invention solves this problem with a method for producing three-dimensionally structured, in particular flat coatings or layers of PUR foam on a base according to the features of claim 1.
  • a foamable mixture of PUR foam based on a one- or two-component system containing isocyanate and / or prepolymers with terminal isocyanate groups as well as dihydric and / or higher alcohols and auxiliaries is applied to the substrate to be coated and the applied Foamable mixture immediately afterwards and during the foaming and beginning crosslinking of the mixture on the base under mechanical action, spread into a layer, distributed and structured.
  • foamable mixtures are used which cure with moisture from the environment with crosslinking.
  • the present invention is with PUR foams made from a one component system or
  • Propellant can be realized.
  • a basic component comprises the polyols, catalysts, stabilizers, if appropriate
  • PUR foam for the invention One-component systems suitable for the production of PUR foam for the invention are described, for example, in EP 0 066 830 B2, DE 44 41 696 AI and DE 44 41 570 AI and in the literature cited in these documents, as well as suitable two-component systems .
  • Both one-component and two-component systems for the production of rigid PU foams with physical blowing agents are commercially available, namely packaged, for example, in pressure containers such as aerosol cans, steel bottles or the like.
  • These PUR rigid foams which are referred to as assembly foam or local foam, are used in the construction industry in particular for filling cavities and joints, for isolating water pipes, sealing openings and gaps, as an adhesive for bridging unevenness of substrates for the laying of further
  • the one- or two-component mixture in the pressure vessels is sprayed or sprayed on-site directly into the cavities and fills the corresponding spaces or joints by foaming.
  • these known foamable systems are used to produce flat structured coatings.
  • exterior or interior plaster it can be advantageous not to set the degree of foaming too high.
  • a combination of chemical and physical blowing processes for the foamable mixture is proposed to be advantageous for the production of exterior or interior plaster.
  • Polyol mixtures such as polyether and polyester polyols, can be used as component (B) for this purpose.
  • Preferred polyester diols are esters of aliphatic dicarboxylic acids with 4 to 8 carbon atoms in the alkylene radical, which are reacted with diols, and as dihydric alcohols, ethylene glycol, diethylene glycol, 1,2- or 1,3-propylene glycol, dipropylene glycol, 1,4-butanediol and 1,6-hexanediol can be used.
  • a foamable mixture can be used which foams and crosslinks only chemically using the isocyanate-water reaction after the flat application to the substrate in the presence of atmospheric moisture.
  • the surface of the mixture distributed on the base can be wetted with water in desired areas or in total.
  • the foamable mixture preferably contains a physical blowing agent and is applied from a pressure container to the substrate to be coated under pressure.
  • the foamable mixture applied to the base is spread over a surface with a doctor blade or spatula or roller to form a layer of varying thickness in a regular or irregular shape and, as a result, the desired three-dimensional structure is obtained by the foaming of the structured layer thus formed, which varies in areas.
  • a further layer of a foamable mixture for producing a PUR foam can be applied and distributed before a first layer of a foamable mixture applied to a base is hardened to produce a PUR foam.
  • the surface of the existing PUR foam layer on which the further layer is to be applied can be wetted with water.
  • a foamable PUR mixture enriched with a physical blowing agent with a foaming factor of 1: 3 to 1: 5 after spraying under the pressure of the blowing agent (up to 20 bar) to distribute, spread, rub, even after the start and during the onset of foaming and also after the onset of crosslinking.
  • This mechanical processing of the foamable mixture with or without a physical blowing agent can be carried out by filling, stirring, dabbing, brushing, comb-like brushing, etc.
  • the foaming is shifted by the mechanical processing and bubbles only form after the mixture has been distributed, so that bubble-rich and bubble-free regions which alternate with one another are formed in accordance with the regular or irregular distribution of the foamable mixture, ie more compact regions with highly foamed regions.
  • the spatial structure and density of the foamed coating can be varied almost as high as desired.
  • Relief-like, mountain-like three-dimensional structures, row-like pearl-cord-like structures or flat scale-like or scree-like surface structures can be achieved.
  • coatings according to the invention can also be produced as exterior plaster or interior plaster of building walls.
  • the PUR foam layers produced have a structured but cross-linked surface layer that is waterproof and abrasion-resistant, but the layer as a whole is sufficiently breathable.
  • the structured PUR foam layer applied according to the invention can be provided with a paint application, for example in order to increase the UV resistance or to achieve a decorative effect. It is also possible to add a colorant to the foamable mixture in order to obtain a colored foam layer.
  • An advantageous further development of the invention is the combination of superficial mechanical processing of the foamable mixture, for example sprayed on a surface, as a coating in connection with an application of paint, i.e. the application of a colorant.
  • the colorant can be applied and distributed in the form of a varnish or a dispersion, for example using a roller or doctor, the mechanical structuring and influencing of the surface of the foamable mixture applied during foaming or crosslinking simultaneously with the process of applying and distributing the Colorant takes place.
  • the foamable PUR mixture applied to a base can be mechanically redistributed by the action of force even after foaming has started and crosslinking has begun, after a sticky surface skin has already formed.
  • plucking or tearing of the coating on the surface is possible, as a result of which additional structuring is obtained.
  • This processing according to the invention can be used particularly advantageously for extremely decorative coatings, as are desired in artistic work for three-dimensional images, paintings and reliefs.
  • foamable PUR mixtures in layers or only in regions to a specific layer on a first layer of foamable PUR mixture. This can take place in the already existing layer which has not yet been fully foamed and / or cured. To avoid liability, to increase the degree of crosslinking or the degree of foaming, it may be advisable to wet the existing layer with water. In the reaction with the isocyanate, additional CO 2 can be formed which acts as a blowing agent.
  • the method according to the invention it is also possible to produce flat, three-dimensionally structured structures of decorative type as paintings or collages, reliefs individually or integrated in wall surfaces in the plaster or the like.
  • the foamable PUR mixture also adheres very well to canvas, cotton fabric, jute and other natural fiber materials.
  • the method according to the invention makes it possible to produce any three-dimensional structures of a flat foam structure by varying the thickness of the application of the foamable PUR mixture and correspondingly any regular or irregular subsequent mechanical distribution. Even after complete foaming and crosslinking, the layer thus formed can still be mechanically, e.g. processed with a knife or provided with a coloring or varnish coating or a glaze. As a colorant, color varnish or glaze, all commercially available colors are in
  • Shape of dispersions, emulsions, plastic dispersions, or dissolved in solvents that have good adhesion to polyurethane foam can be used.
  • the foamable mixture can be applied using disposable pressure containers, spray guns or other suitable devices.
  • a nozzle for applying the foamable mixture can be provided, which is designed either as a simple round nozzle or as a nozzle with several spaced-apart round nozzles as an outlet or as a slot nozzle, wide slot nozzle and optionally with an incorporated shape for structure lines.
  • sprinkling for example, sand, this sprinkling being carried out at the point in time at which the surface of the PUR foam is still sticky and not completely crosslinked.
  • the mechanical processing of the foamable PUR mixture applied to a substrate is preferably carried out within the first 10 minutes after application. In the case of very thick foamable layers, this period of time for mechanical processing in the not yet cured state of the PUR foam is extended.
  • foamable mixtures for the manufacture of polyurethane foam with a physical blowing agent preferably CFC have released, proven on the basis of diphenylmethane-4, 4-diisocyanate, the moisture-curing at + 5 ° C to + Are 30 ° C.
  • the foamable mixture As long as the foamable mixture has not yet hardened, it can be shaped more or less. As a rule, curing and crosslinking has progressed to the point after 2 hours that substantial deformation can no longer be achieved.
  • foamable mixture flame-retardant using flame retardants, e.g. according to building material class Bl or B2 according to DIN 4102.
  • flame retardants e.g. according to building material class Bl or B2 according to DIN 4102.
  • inorganic fillers such as
  • Flame retardants can be added to the foamable mixture in customary amounts, in particular about 2 to 18% by weight. -% based on the foamable mixture. Flame resistant or. heavy Flammable, foamable PUR mixtures enable the production of plaster on building walls using the process according to the invention, both inside and outside, in compliance with the building regulations.
  • bioeids can additionally be contained in the foamable mixture as protection against attacks by microorganisms.
  • the foamable mixture can also be any foamable mixture.
  • the foamable mixture can also be any foamable mixture.
  • Anti-aging agents against photooxidation and hydrolysis can be added in customary amounts.
  • the layers according to the invention e.g. when used as plaster, even at a later point in time for cracks, etc. to be repaired easily, since again only foamable PUR mixture needs to be applied to the repair site.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

La présente invention concerne un procédé de fabrication de revêtements structurés tridimensionnels en mousse de polyuréthane (mousse PUR) destinés à décorer un support. On place un mélange moussant, selon un système à un ou deux composants, sur le support prévu à cet effet, éventuellement par pression, ce mélange étant immédiatement appliqué, étalé et structuré en couche, en phase d'émulsion et d'amorce de réticulation, sous l'action d'une force mécanique.
EP97936703A 1996-08-13 1997-08-12 Procede de fabrication de revetements structures en mousse de polyurethane Withdrawn EP0918808A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19632513 1996-08-13
DE19632513 1996-08-13
DE19632987A DE19632987C1 (de) 1996-08-13 1996-08-15 Verfahren zum Herstellen strukturierter Beschichtungen aus Polyurethanschaum und Anwendung desselben
DE19632987 1996-08-15
PCT/EP1997/004365 WO1998006769A1 (fr) 1996-08-13 1997-08-12 Procede de fabrication de revetements structures en mousse de polyurethane

Publications (1)

Publication Number Publication Date
EP0918808A1 true EP0918808A1 (fr) 1999-06-02

Family

ID=26028343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97936703A Withdrawn EP0918808A1 (fr) 1996-08-13 1997-08-12 Procede de fabrication de revetements structures en mousse de polyurethane

Country Status (7)

Country Link
US (1) US6210753B1 (fr)
EP (1) EP0918808A1 (fr)
AU (1) AU3943497A (fr)
CA (1) CA2263364A1 (fr)
PL (1) PL331556A1 (fr)
TR (1) TR199900775T2 (fr)
WO (1) WO1998006769A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090325445A1 (en) * 2008-06-27 2009-12-31 Bogdan Mary C Method of insulating temporary polymeric structures with polyurethane or polyisocyanurate foam
CN102471439B (zh) * 2009-07-24 2014-02-19 圣戈班性能塑料谢纳有限公司 聚氨酯垫片及其形成方法
EP2999829B1 (fr) 2013-05-23 2020-10-28 Q-Bot Limited Procédé pour recouvrir une surface d'un bâtiment et robot correspondant
GB2539661B (en) * 2015-06-22 2019-06-26 Q Bot Ltd Robotic Vehicle

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112397A1 (de) * 1971-03-15 1972-09-21 Engelbert Wallenda Kunststoff-Schaumstoff-Basis Polyester-Polyurethanvergussmassen und Polyurethan-Schaumstoff
DE2347988A1 (de) 1973-09-24 1975-04-03 Benecke Gmbh J Verfahren zur herstellung oberflaechlich strukturierter pvc-schaeume sowie nach diesem verfahren angefertigte flaechengebilde
JPS5483524A (en) 1977-12-15 1979-07-03 Nippon Kankoushi Kougiyou Kk Foaming paint
US4193957A (en) 1978-05-10 1980-03-18 Armstrong Cork Company Process for forming a surface covering having decorative effects
US4350775A (en) * 1981-02-10 1982-09-21 Blount David H Process for the production of alkali metal silicate-organic plastics
DE3122790C2 (de) 1981-06-09 1983-12-29 Henkel KGaA, 4000 Düsseldorf Verfahren zur Herstellung von formstabilen Polyurethanschaumstoffen
US4515646A (en) * 1983-11-22 1985-05-07 Paul Walker Method for applying polyurethane backing
EP0160716A1 (fr) * 1984-05-04 1985-11-13 Henkel Kommanditgesellschaft auf Aktien Mousse isolante
DE4120306A1 (de) 1991-06-20 1992-12-24 Hager Wolfgang Verfahren und vorrichtung zur herstellung einer strukturschaumstofftapete
DE4337012A1 (de) 1993-10-29 1995-05-04 Bayer Ag Verfahren zur Herstellung halbharter Urethangruppen aufweisender Schaumstoffe mit verbesserten Fließeigenschaften
DE4441696A1 (de) 1994-11-24 1996-05-30 Henkel Kgaa Schaumkunststoff aus Einweg-Druckbehaeltern
DE4441570A1 (de) 1994-11-23 1996-05-30 Henkel Kgaa Schaumkunststoff aus Einweg-Druckbehältern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9806769A1 *

Also Published As

Publication number Publication date
PL331556A1 (en) 1999-07-19
WO1998006769A1 (fr) 1998-02-19
US6210753B1 (en) 2001-04-03
AU3943497A (en) 1998-03-06
CA2263364A1 (fr) 1998-02-19
TR199900775T2 (xx) 1999-06-21

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