EP0199785A1 - Process for providing plastics with a primer - Google Patents

Process for providing plastics with a primer

Info

Publication number
EP0199785A1
EP0199785A1 EP85905506A EP85905506A EP0199785A1 EP 0199785 A1 EP0199785 A1 EP 0199785A1 EP 85905506 A EP85905506 A EP 85905506A EP 85905506 A EP85905506 A EP 85905506A EP 0199785 A1 EP0199785 A1 EP 0199785A1
Authority
EP
European Patent Office
Prior art keywords
polyacrylate
aqueous dispersion
polyurethane
pigment
weight
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Withdrawn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
EP85905506A
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Weinert
Frank Clasen
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.)
Chemulack Chemische-Und Lackfabrik & Co KG GmbH
Original Assignee
Chemulack Chemische-Und Lackfabrik & Co KG 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
Priority claimed from DE19843440537 external-priority patent/DE3440537A1/en
Application filed by Chemulack Chemische-Und Lackfabrik & Co KG GmbH filed Critical Chemulack Chemische-Und Lackfabrik & Co KG GmbH
Publication of EP0199785A1 publication Critical patent/EP0199785A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes

Definitions

  • the polyacrylate has reactive carboxyl groups.
  • the polyacrylate is free of reactive carboxyl groups, which does not rule out that the polyacrylate contains small amounts of carboxyl groups due to the manufacturing process.
  • a second invention is based on the object, a suitable coating for the primer mentioned above to accomplish.
  • an aqueous dispersion is used as the coating to be applied to the primer, which comprises an aliphatic, reactive carboxyl group-containing polyurethane, a reactive carboxyl group-containing or free of such carboxyl group, optionally a pigment and possibly a hardener contains, the ratio of polyurethane to polyacrylate between 90:10 and 10:90, in particular between 80:20 and 20:80, in particular between 70:30 and 30:70, in particular between 60:40 and 40:60.
  • Such a coating not only adheres well, it also does not attack the plastic (through the primer) and is also environmentally friendly.
  • the above object is achieved in that a mixture is used as the coating to be applied to the primer, which contains a polymer containing hydroxyl groups as a binder, in particular polyacrylate and / or polyester, an organic solvent, optionally a pigment and a hardener, in particular an isocyanate, contains.
  • a mixture is used as the coating to be applied to the primer, which contains a polymer containing hydroxyl groups as a binder, in particular polyacrylate and / or polyester, an organic solvent, optionally a pigment and a hardener, in particular an isocyanate, contains.
  • This coating also adheres well and does not or hardly attacks the plastic under the primer through the primer.
  • ABS acrylonitrile-butadiene-styrene copolymers
  • PA polyamide
  • POM paintable polyoxymethylene
  • PUR polyurethane
  • PVC polyvinycnioria
  • EPDM polypropylene rubber modified
  • PVCA vinyl chloride-vinyl acetate copolymers
  • UP unsaturated polyester
  • EP pretreated e.g. flamed Polyethylene (PE) and polypropylene (FF), polyphenylene oxide (PPO), in particular Noryl 731-802, polybutylene terephthalate (PBTP), GRP, polystyrene (PS)
  • ABS acrylonitrile-butadiene-styrene copolymers
  • PA polyamide
  • POM paintable polyoxymethylene
  • PUR polyurethane
  • PVC polyvinycnioria
  • EPDM polypropylene rubber modified
  • PP-EPDM vinyl chloride-vinyl acetate copolymers
  • UP
  • the dispersion be applied with or without pigments as the first and optionally only layer.
  • the dispersion can be used quite generally as a coating for plastics, regardless of whether it contains pigments or not: it does not attack the plastic and is environmentally friendly.
  • a second layer is applied to the first dispersion, it may contain organic solvents. These do not or hardly penetrate through the first layer. However, there is a further improvement in terms of non-interference with the plastic substrate if the second layer is also a dispersion according to the invention.
  • the dispersion according to the invention can be used particularly advantageously for coating hard PVC parts, in particular window parts, because PVC must be coated, since it would otherwise be degraded by the weather. It is particularly expedient if the layer to be applied directly to the rigid PVC parts contains a pigment and if, when a second layer is provided, this is an aqueous dispersion corresponding to the first layer (with or without pigment). If there is no pigment in the second layer, it may contain a UV absorber. If a metal pigmentation is provided for the second layer, it is expedient to first apply a metal base lacquer to the first layer and, after it has dried, the clear lacquer according to the invention or a top lacquer containing a metal pigment.
  • polyurethane dispersions are used which, at a solids content (% by weight) of 25-5o%, preferably 35-4o%, have a consistency of ⁇ 3000 mPas, preferably loo- 5oo mpas .
  • the liquid portion need not only consist of water, but it can also consist of 75-99% by weight, in particular 81-92% by weight, water and 25-1% by weight, in particular 19-8% by weight, of organic solvents and added neutralization means exist.
  • Such a dispersion that is completely or largely free of organic solvents does not attack the plastic that is coated. In addition, the dispersion cannot cause contamination of the atmosphere.
  • the dispersion can be used with and without a curing accelerator.
  • the otherwise customary pigments can be used as the pigment.
  • the aqueous dispersion can be applied by the usual methods.
  • the primer or coatings can also have additives, such as butchers, leveling agents.
  • the invention also relates to the fabrics according to the claims.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

Un procédé d'application d'une couche d'apprêt aux matières plastiques consistant essentiellement à utiliser une dispersion aqueuse contenant a) un polyuréthane aliphatique composé de groupes de carboxyle réactifs, b) un polyacrylate, c) un pigment, et éventuellement d) un durcisseur. Ce genre d'apprêt n'attaque pas la matière plastique et ne nuit pas à l'environnement.A method of primer coating plastics consisting essentially of using an aqueous dispersion containing a) an aliphatic polyurethane composed of reactive carboxyl groups, b) a polyacrylate, c) a pigment, and optionally d) a hardener. This kind of primer does not attack the plastic material and does not harm the environment.

Description

Verfahren zum Grundieren von KunststoffenProcess for priming plastics
Es ist ein Verfahren zur Grundierung von Kunststoffen, bei dem man als Grundierungsmittel eine wässrige Dispersion verwendet, welche ein aliphatisches, reaktionsfähige Carboxylgruppen aufweisendes Polyurethan, ein Polyacrylat, ein Pigment und ggf. einen Härter enthält, (nicht bekannt, aber von der Anmelderin) bereits vorgeschlagen worden (s.DE-PS 3 316 550).It is a process for the priming of plastics, in which an aqueous dispersion is used as the primer which contains an aliphatic, reactive carboxyl group-containing polyurethane, a polyacrylate, a pigment and possibly a hardener (not known, but by the applicant) have been proposed (see DE-PS 3 316 550).
I.I.
Nach di-esem Vorschlag weist das Polyacrylat reaktionsfähige Carboxylgruppen auf.According to this proposal, the polyacrylate has reactive carboxyl groups.
Gemäß einer ersten Erfindung ist das Polyacrylat frei von reaktionsfähigen Carboxylgruppen, was nicht ausschließt, daß das Polyacrylat herstelluhgsbedingte geringfügige Mengen an Carboxylgruppen enthält.According to a first invention, the polyacrylate is free of reactive carboxyl groups, which does not rule out that the polyacrylate contains small amounts of carboxyl groups due to the manufacturing process.
Es hat sich gezeigt, daß die Aufgabe gemäß dem eingangserwähnten Vorschlag, nämlich die Schaffung eines Verfahrens zum Grundieren von Kunststoffen, bei dem einerseits der Kunststoff nicht angegriffen wird und das andererseits umweltfreundlich ist, auch auf diese Weise lösbar ist.It has been shown that the task according to the above-mentioned proposal, namely the creation of a method for priming plastics, in which on the one hand the plastic is not attacked and on the other hand is environmentally friendly, can also be solved in this way.
Insbesondere können nunmehr auch höher polymerisierte Polyacrylate zum Einsatz kommen, was zur Folge hat, daß die Härte und damit z.B. die Steinschlag-Festigkeit des Endproduktes gesteigert werden kann.In particular, higher polymerized polyacrylates can now be used, which has the consequence that the hardness and thus e.g. the rockfall resistance of the end product can be increased.
II.II.
Einer zweiten Erfindung liegt die Aufgabe zugrunde, zu der eingangs erwähnten Grundierung, einen geeigneten Überz zu schaffen.A second invention is based on the object, a suitable coating for the primer mentioned above to accomplish.
Diese Aufgabe wird erfindungsgemäß einerseits dadurch gelöst, daß als auf die Grundierung aufzutragender Überzug eine wässrige Dispersion verwendet wird, welche ein aliphatisches, reaktionsfähige Carboxylgruppen aufweisendes Polyurethan, ein reaktionsfähige Carboxylgruppen aufweisendes oder von solchen Carboxylgruppen freies Polyacrylat, ggf. ein Pigment und ggf. einen Härter enthält, wobei das Verhältnis von Polyurethan zu Polyacrylat zwischen 90 : 10 und 10 : 90, insbesondere zwischen 80 : 20 und 20 : 80, insbesondere zwischen 70 : 30 und 30 : 70, insbesondere zwischen 60 : 40 und 40 : 60, liegt.This object is achieved on the one hand in that an aqueous dispersion is used as the coating to be applied to the primer, which comprises an aliphatic, reactive carboxyl group-containing polyurethane, a reactive carboxyl group-containing or free of such carboxyl group, optionally a pigment and possibly a hardener contains, the ratio of polyurethane to polyacrylate between 90:10 and 10:90, in particular between 80:20 and 20:80, in particular between 70:30 and 30:70, in particular between 60:40 and 40:60.
Ein solcher Überzug haftet nicht nur gut, er greift ferner den Kunststoff (durch die Grundierung hindurch) nicht an und ist außerdem umweltfreundlich.Such a coating not only adheres well, it also does not attack the plastic (through the primer) and is also environmentally friendly.
Obige Aufgabe wird erfindungsgemäß andererseits dadurch gelöst, daß als auf die Grundierung aufzutragender Überzug eine Mischung verwendet wird, die ein hydroxylgruppenhaltiges Polymer als Bindemittel, insbesondere Polyacrylat und/oder Polyester, ein organisches Lösungsmittel, ggf. ein Pigment und einen Härter, insbesondere ein Isozyanat, enthält.On the other hand, the above object is achieved in that a mixture is used as the coating to be applied to the primer, which contains a polymer containing hydroxyl groups as a binder, in particular polyacrylate and / or polyester, an organic solvent, optionally a pigment and a hardener, in particular an isocyanate, contains.
Auch dieser Überzug haftet gut und greift durch die Grundierung hindurch den unter der Grundierung befindlichen Kunststoff nicht oder kaum an.This coating also adheres well and does not or hardly attacks the plastic under the primer through the primer.
Beide Beschichtungen sind primär für die Auto-Industrie gedacht. Den sehr strengen Normen derselben genügen sie.Both coatings are primarily intended for the automotive industry. They meet the very strict norms of the same.
Weiterhin wird erfindungsgemäß vorgeschlagen, daß als zu beschichtendes Kunststoffsubstrat AcrylnitrilButadien-Styrol-Copolymere (ABS), Polyamid (PA), lackier fähiges Polyoxymethylen (POM), insbesondere Hostaform X 313, Polyurethan (PUR), Polyvinycnioria (PVC), Kautschuk (EPDM), Polypropylen Kautschuk modifiziert (PP-EPDM), Vinylchlorid-Vinylacetat-Copolymere (PVCA), ungesättigte Polyester (UP), Epoxid (EP), vorbehandelt z.B. geflammtes Polyäthylen (PE) und Polypropylen (FF) Polyphenylenoxid (PPO), insbesondere Noryl 731-802, Polybutylenterephthalat (PBTP), GFK, Polystyrol (PS) verwendet werden.Furthermore, it is proposed according to the invention that as the plastic substrate to be coated, acrylonitrile-butadiene-styrene copolymers (ABS), polyamide (PA), paintable polyoxymethylene (POM), in particular Hostaform X 313, polyurethane (PUR), polyvinycnioria (PVC), rubber (EPDM), polypropylene rubber modified (PP-EPDM), vinyl chloride-vinyl acetate copolymers (PVCA), unsaturated polyester (UP), epoxy (EP), pretreated e.g. flamed Polyethylene (PE) and polypropylene (FF), polyphenylene oxide (PPO), in particular Noryl 731-802, polybutylene terephthalate (PBTP), GRP, polystyrene (PS) can be used.
III.III.
Gemäß einer dritten Erfindung wird vorgeschlagen, daß die Dispersion mit oder ohne Pigmente als erste und gegebenenfalls einzige Schicht aufgetragen wird.According to a third invention, it is proposed that the dispersion be applied with or without pigments as the first and optionally only layer.
Es hat sich gezeigt, daß die Dispersion ganz allgemein als Beschichtung für Kunststoffe eingesetzt werden kann, unabhängig davon, ob sie Pigmente enthält oder nicht: Sie greift den Kunststoff nicht an und ist umweltfreundlich.It has been shown that the dispersion can be used quite generally as a coating for plastics, regardless of whether it contains pigments or not: it does not attack the plastic and is environmentally friendly.
Wird auf die erste Dispersion erfindungsgemäß eine zweite Schicht aufgetragen, so kann diese durchaus organische Lösungsmittel enthalten. Diese dringen nicht oder kaum durch die erste Schicht hindurch. Eine weitere Verbesserung in puncto Nichtoeeinflussung des Kunststoff-Substrats liegt allerdings dann vor, wenn auch die zweite Schicht eine erfindungsgemäße Dispersion ist.If, according to the invention, a second layer is applied to the first dispersion, it may contain organic solvents. These do not or hardly penetrate through the first layer. However, there is a further improvement in terms of non-interference with the plastic substrate if the second layer is also a dispersion according to the invention.
Besonders vorteilhaft kann die erfindungsgemäße Dispersion zur Beschichtung von Hart-PVC-Teilen, insbesondere Fensterteilen, eingesetzt werden, denn PVC muß beschichtet werden, da es anderenfalls durch Witterungseinflüsse abgebaut würde. Insbesondere ist es dann zweckmäßig, wenn die unmittelbar auf die Hart-PVC-Teile aufzutragende Schicht ein Pigment enthält und wenn bei Vorsehung einer zweiten Schicht diese eine wässrige Dispersion entsprechend der ersten Schicht (mit oder ohne Pigment) ist. Befindet sich in der zweiten Schicht kein Pigment, kann darin ein UV-Absorber enthalten sein. Ist für die zweite Schicht eine Metall-Pigmentierurig vorgesehen, so wird man zweckmäßigerweise zunächst auf die erste Schicht einen Metall-Basis-Lack und nach Antrocknung derselben darauf den erfindungsgemäßen Klarlack oder einen Metallpigment enthaltenden Decklack auftragen.The dispersion according to the invention can be used particularly advantageously for coating hard PVC parts, in particular window parts, because PVC must be coated, since it would otherwise be degraded by the weather. It is particularly expedient if the layer to be applied directly to the rigid PVC parts contains a pigment and if, when a second layer is provided, this is an aqueous dispersion corresponding to the first layer (with or without pigment). If there is no pigment in the second layer, it may contain a UV absorber. If a metal pigmentation is provided for the second layer, it is expedient to first apply a metal base lacquer to the first layer and, after it has dried, the clear lacquer according to the invention or a top lacquer containing a metal pigment.
IV.IV.
Als Polyurethane und Polyacrylate kommen all jene Stoffe in Frage, die in Wasser dispergiert (als Dispersion oder Hydrosol) sind, oberhalb von 0°C filmbildende Eigenschaften aufweisen, pigmentverträglich und lagerstabil sind.All those substances which are dispersed in water (as a dispersion or hydrosol), have film-forming properties above 0 ° C., are pigment-compatible and have a long shelf life are suitable as polyurethanes and polyacrylates.
Zur Herstellung der zu verwendenden Grundierungsmittel bzw. Überzüge werden Polyurethan-Dispersione eingesetzt, die bei einem Festkörpergehalt (Gew.-%) von 25 - 5o % , vorzugsweise 35 - 4o %, eine Konsistenz von <3000 mPas, vorzugsweise loo - 5oo mpas aufweisen. Das PolyacryIat-Hydrosol hat bei einem Festkörperanteil in Gewichtsprozent von 30 - 60 % , vorzugsweise 45 - 5o % , eine Konsistenz von <1000 mPas, vorzugsweise <400 mPas.For the preparation of the primers or coatings to be used, polyurethane dispersions are used which, at a solids content (% by weight) of 25-5o%, preferably 35-4o%, have a consistency of <3000 mPas, preferably loo- 5oo mpas . The polyacrylic hydrosol with a solids content in weight percent of 30-60%, preferably 45-50%, has a consistency of <1000 mPas, preferably <400 mPas.
Der Flüssigkeitsanteil braucht nicht nur aus Wasser zu bestehen, sondern er kann auch aus 75 - 99 Gew.insbesondere 81 - 92 Gew.-%, Wasser und 25 - 1 Gew.-%, insbesondere 19 - 8 Gew.-%, organischen Lösungsmitteln und zugesetztem Neutralisations mittel bestehen.The liquid portion need not only consist of water, but it can also consist of 75-99% by weight, in particular 81-92% by weight, water and 25-1% by weight, in particular 19-8% by weight, of organic solvents and added neutralization means exist.
Eine solche vollständig oder weitgehend von Lösungsmitteln organischer Art freie Dispersion greift den Kunststoff, der überzogen wird, nicht an. Hinzu kommt, daß die Dispersion keine Verunreinigung der Atmosphäre bewirken kann.Such a dispersion that is completely or largely free of organic solvents does not attack the plastic that is coated. In addition, the dispersion cannot cause contamination of the atmosphere.
Die Dispersion kann mit und ohne Härtungsbeschleuniger verwendet werden. Als Pigment können die sonst üblichen Pigmente eingesetzt werden.The dispersion can be used with and without a curing accelerator. The otherwise customary pigments can be used as the pigment.
Die wässrige Dispersion kann durch die üblichen Verfahren aufgetragen werden.The aqueous dispersion can be applied by the usual methods.
Natürlich kann (können) die Grundierung bzw. Überzüge zusätzlich Additive, wie Metzmittel, Verlaufmittel, aufweisen.Of course, the primer or coatings can also have additives, such as butchers, leveling agents.
Die Erfindung bezieht sich auch auf die Stoffe gemäß den Ansprüchen. The invention also relates to the fabrics according to the claims.

Claims

Patentansprüche :Claims:
I.I.
1. Verfahren zur Grundierung von Kunststoffen, dadurch g e k e n n z e i c h n e t , daß man als Grundierungsmittel eine wassrige Dispersion verwendet, welche1. A method for priming plastics, characterized in that an aqueous dispersion is used as the primer, which
(a) ein aliphatisches, reaktionsfähige Carboxylgruppen aufweisendes Polyurethan(a) an aliphatic, reactive carboxyl group-containing polyurethane
(b) ein Polyacrylat(b) a polyacrylate
(c) ein Pigment und ggf.(c) a pigment and optionally
(d) einen Härter(d) a hardener
enthält, wobei das Verhältnis von Polyurethan zu Polyacrylat zwischen 90 : 10 und 10 : 90, insbesondere zwischen 80 : 20 und 20 : 80, insbesondere zwischen 70 : 30 und 30 : 70, insbesondere zwischen 6o : 4o und 4o : 6o, liegt und das Polyacrylat frei von reaktionsfähigen Carboxylgruppen ist.contains, the ratio of polyurethane to polyacrylate between 90:10 and 10:90, in particular between 80:20 and 20:80, in particular between 70:30 and 30:70, in particular between 6o: 4o and 4o: 6o, and the polyacrylate is free of reactive carboxyl groups.
2. Verfahren nach Anspruch 1, dadurch g e k e n nz e i c h n e t , daß man eine wassrige Dispersion verwendet, in der das Verhältnis von Polyurethan zu Polyacrylat 50. : 50 ist.2. The method according to claim 1, characterized in that an aqueous dispersion in which the ratio of polyurethane to polyacrylate is 50:50 is used.
3. Verfahren nach Anspruch 1 oder 2, dadurch g e k e n n z e i c h n e t , daß man eine wassrige Dispersion verwendet, die als Härter (d) ein Alkylazeridin oder bei Härtungstemperaturen oberhalb von 8o° C Melaminharz enthält.3. The method according to claim 1 or 2, characterized in that an aqueous dispersion is used which contains an alkylaceridine as hardener (d) or melamine resin at hardening temperatures above 8 ° C.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch g e k e n n z e i c h n e t , daß man eine wassrige Dispersion verwendet, in der der Festkörperanteil (a), (b) und (c), bezogen auf (a), (b), (c) und Wasser, 20 - 80 Gew.-%, insbesondere 35 - 7o Gew. -%, insbesondere 52 - 58 Gew. -%, beträgt.4. The method according to any one of claims 1 to 3, characterized in that one aqueous dispersion used in which the solids content (a), (b) and (c), based on (a), (b), (c) and water, 20-80 wt .-%, in particular 35-7o Gew. %, in particular 52-58% by weight.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch g e k e n n z e i chn e t , daß man eine wassrige Dispersion verwendet, in der der Anteil des Härters (d), bezogen auf (a), (b), (c) und Wasser, 0,5 - 4 Gew.-%, insbesondere 2 Gew.-%, beträgt oder bei Verwendung von Melaminharz5. The method according to any one of claims 1 to 4, characterized gekennzei chn et that one uses an aqueous dispersion in which the proportion of the hardener (d), based on (a), (b), (c) and water, 0 , 5 - 4 wt .-%, in particular 2 wt .-%, or when using melamine resin
5 - 30 Gew.-%.5 - 30% by weight.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch g e k e n n z e i c h n e t , daß man eine wassrige Dispersion verwendet, die geringe Mengen eines organischen Lösungsmittels enthält.6. The method according to any one of claims 1 to 5, characterized in that an aqueous dispersion containing small amounts of an organic solvent is used.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch g e k e n n z e i c h n e t , daß man eine wassrige Dispersion verwendet, die zusätzlich einen Extender enthält, wobei dann der Festkörper aus 5 - 80 Gew.-%, insbesondere 50 Gew.-%, Pigment und Extender und 95 - 20 Gew.-%, insbesondere 50 Gew.-%, Polyurethan und Polyacrylat besteht.7. The method according to any one of claims 1 to 6, characterized in that an aqueous dispersion is used which additionally contains an extender, the solid then consisting of 5-80% by weight, in particular 50% by weight, pigment and extender and 95-20% by weight, in particular 50% by weight, of polyurethane and polyacrylate.
II.II.
8. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Polyacrylat reaktinsfähige Carboxylgruppen enthält und/oder nicht enthält, dadurch g e k e nn z e i chn e t , daß als auf die Grundierung aufzutragender Überzug eine wassrige Dispersion verwendet wird, welche8. The method according to any one of claims 1 to 7, wherein the polyacrylate contains and / or does not contain reactive carboxyl groups, thereby g e k e nn z e i chn e t that an aqueous dispersion is used as the coating to be applied to the primer, which
(e) ein aliphatisches, reaktionsfähige Carboxylgruppen aufweisendes Polyurethan (f) ein reaktionsfähige Carboxylgruppen aufweisendes oder von solchen Carboxylgruppen freies Polyacrylat(e) an aliphatic, reactive carboxyl group-containing polyurethane (f) a polyacrylate which has reactive carboxyl groups or is free of such carboxyl groups
(g) ggf. ein Pigment und (h) ggf. einen Härter(g) optionally a pigment and (h) optionally a hardener
enthält, wobei das Verhältnis von Polyureth-an zu Polyacrylat zwischen 9o : 1o und 1o : 9o, insbesondere zwischen 80 : 2o und 2o : 80, insbesondere zwischen 7o : 3o und 30 : 7o, insbesondere zwischen 60 : 4o und 4o : 60, liegt.contains, the ratio of polyurethane to polyacrylate between 9o: 1o and 1o: 9o, in particular between 80: 2o and 2o: 80, in particular between 7o: 3o and 30: 7o, in particular between 60: 4o and 4o: 60, lies.
9. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Polyacrylat reaktionsfähige Carboxylgruppen enthält und/oder nicht enthält, dadurch g e k e n n z e i c h n e t , daß als auf die Grundierung aufzutragender Überzug eine Mischung verwendet wird, die9. The method according to any one of claims 1 to 7, wherein the polyacrylate contains and / or does not contain reactive carboxyl groups, thereby g e k e n n z e i c h n e t that a mixture is used as the coating to be applied to the primer, the
(i) ein hydroxylgruppenhaltiges Polymer als Bindemittel, insbesondere Polyacrylat und/oder Polyester(i) a hydroxyl-containing polymer as a binder, in particular polyacrylate and / or polyester
(j) ein organisches Lösungsmittel(j) an organic solvent
(k) ggf. ein Pigment und(k) optionally a pigment and
(1) einen Härter, insbesondere ein Isozyanat(1) a hardener, especially an isocyanate
enthält.contains.
1o. Verfahren nach Anspruch 8 oder 9, dadurch g e k e n n z e i c h n e t , daß als zu beschichtendes Kunststoffsubstrat Acrylnitril-Butadien-Styrol-Copolymere (ABS), Polyamid (PA), lackierfähiges Polyoxymethyl (POM), insbesondere Hostaform X 313, Polyurethan (PUR), Polyvinylchlorid (PVC), Kautschuk (EPDM), Polypropylen Kautschuk modifiziert (PP-EPDM), Vinylchlorid-Vinylacetat-Copolymere (PVCA), ungesättigte Polyester (UP), Epoxid (EP), vorbehandeltes, z.B. geflammtes Polyäthylen (PE) und Polypropylen (PP), Polyphenylenoxid (PPO), insbesondere Noryl 731 -802, Polybutylenterephthalat (PBTP), GFK, Polystyrol (PS) verwendet werden.1o. A method according to claim 8 or 9, characterized in that the plastic substrate to be coated is acrylonitrile-butadiene-styrene copolymers (ABS), polyamide (PA), paintable polyoxymethyl (POM), in particular Hostaform X 313, polyurethane (PUR), polyvinyl chloride (PVC) ), Rubber (EPDM), polypropylene rubber modified (PP-EPDM), vinyl chloride-vinyl acetate copolymers (PVCA), unsaturated polyester (UP), Epoxy (EP), pretreated, e.g. flamed polyethylene (PE) and polypropylene (PP), polyphenylene oxide (PPO), in particular Noryl 731-802, polybutylene terephthalate (PBTP), GRP, polystyrene (PS) can be used.
III.III.
11. Verfahren zum Beschichten von Kunststoffteilen nach einem der Ansprüche 1 bis 11, wobei das Polyacrylat reaktionsfähige Carboxylgruppen enthält und/oder nicht enthält, dadurch g e k e n n z e i c h n e t , daß die Dispersion mit oder ohne Pigmente als erste Schicht aufgetragen wird.11. A method for coating plastic parts according to any one of claims 1 to 11, wherein the polyacrylate contains and / or does not contain reactive carboxyl groups, characterized in that the dispersion is applied as a first layer with or without pigments.
12. Verfahren nach Anspruch 11, dadurch g e k e n n z e i c h n e t , daß als zu beschichtende Kunststoffteile Hart-PVC-Teile, insbesondere Fensterteile, verwendet werden.12. The method according to claim 11, characterized in that hard PVC parts, in particular window parts, are used as the plastic parts to be coated.
13. Verfahren nach Anspruch 12, dadurch g e k e n n z e i c h n e t , daß die unmittelbar auf die Hart-PVC-Teile aufzutragende Schicht ein Pigment enthält.13. The method according to claim 12, characterized in that the layer to be applied directly to the rigid PVC parts contains a pigment.
14. Verfahren nach Anspruch 13, dadurch g e k e n n z e i c h n e t , daß bei Vorsehung einer zweiten Schicht diese eine wassrige Dis persion entsprechend der ersten Schicht ist. 14. The method according to claim 13, characterized in that, if a second layer is provided, this is an aqueous dispersion corresponding to the first layer.
EP85905506A 1984-11-02 1985-10-25 Process for providing plastics with a primer Withdrawn EP0199785A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19843440537 DE3440537A1 (en) 1983-05-03 1984-11-02 Process for coating plastic parts
DE3440534 1984-11-02
DE3440537 1984-11-02
DE3440535 1984-11-02
DE3440534A DE3440534A1 (en) 1983-05-03 1984-11-02 Process for coating plastics
DE19843440535 DE3440535A1 (en) 1983-05-03 1984-11-02 Process for priming plastics

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EP0199785A1 true EP0199785A1 (en) 1986-11-05

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EP85905506A Withdrawn EP0199785A1 (en) 1984-11-02 1985-10-25 Process for providing plastics with a primer

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AU (1) AU5012985A (en)
WO (1) WO1986002655A1 (en)

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GB8617535D0 (en) * 1986-07-17 1986-08-28 Du Pont Canada Gas barrier structures
DE69004274T2 (en) * 1989-01-18 1994-02-24 Kansai Paint Co Ltd Aqueous thermoplastic coating composition for plastic materials and the same coating process.
DE4239695A1 (en) * 1992-11-26 1994-06-01 Basf Lacke & Farben Process for priming or single-layer painting of plastics with an aqueous coating agent
WO1996010595A1 (en) * 1994-10-04 1996-04-11 Minnesota Mining And Manufacturing Company Reactive two-part polyurethane compositions and optionally self-healable and scratch-resistant coatings prepared therefrom
US5798409A (en) * 1995-10-03 1998-08-25 Minnesota Mining & Manufacturing Company Reactive two-part polyurethane compositions and optionally self-healable and scratch-resistant coatings prepared therefrom
US5952106A (en) * 1996-11-14 1999-09-14 Alliedsignal Inc. Coated nylon film
FR2847259B1 (en) * 2002-11-20 2006-11-24 Hutchinson NEW PAINT COMPOSITIONS FOR ELASTOMERS

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US4278578A (en) * 1979-11-05 1981-07-14 Hillyard Enterprises, Inc. Coating composition for synthetic plastic substrates and methods for preparing and using same
US4301053A (en) * 1980-01-29 1981-11-17 General Electric Company Polyurethane resin coating composition
DE3112704C2 (en) * 1981-03-31 1986-08-07 Basf Farben + Fasern Ag, 2000 Hamburg Aqueous dispersion or emulsion for producing a coating on polyvinyl chloride surfaces
DE3316550C2 (en) * 1983-05-03 1985-07-25 Chemulack Chemische- Und Lackfabrik Gmbh & Co Kg, 1000 Berlin Process for priming plastics

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Title
See references of WO8602655A1 *

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WO1986002655A1 (en) 1986-05-09

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