EP2550339A1 - Procédé de fabrication d'un laquage multicouche colorant et/ou à effet - Google Patents

Procédé de fabrication d'un laquage multicouche colorant et/ou à effet

Info

Publication number
EP2550339A1
EP2550339A1 EP11711829A EP11711829A EP2550339A1 EP 2550339 A1 EP2550339 A1 EP 2550339A1 EP 11711829 A EP11711829 A EP 11711829A EP 11711829 A EP11711829 A EP 11711829A EP 2550339 A1 EP2550339 A1 EP 2550339A1
Authority
EP
European Patent Office
Prior art keywords
basecoat
vinyl ether
coating
pigmented aqueous
carbon atoms
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Withdrawn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
EP11711829A
Other languages
German (de)
English (en)
Inventor
Bernhard Steinmetz
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.)
BASF Coatings GmbH
Original Assignee
BASF Coatings 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 BASF Coatings GmbH filed Critical BASF Coatings GmbH
Publication of EP2550339A1 publication Critical patent/EP2550339A1/fr
Withdrawn legal-status Critical Current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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/29—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for multicolour effects
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • 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
    • C09D129/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/10—Homopolymers or copolymers of unsaturated ethers
    • 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
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16

Definitions

  • the invention relates to a process for the preparation of a color and / or effect multilayer coating in which
  • the invention also relates to pigmented aqueous basecoats which are suitable for the production of color and / or effect multilayer coatings.
  • OEM initial coating
  • wet-in-wet processes result in color and / or effect multilayer coatings which, in particular with regard to the appearance of pinholes visible as the smallest holes in the clearcoat and basecoat, require improvement.
  • the object of the present invention is therefore to provide a method of the type described above with the color and / or effect multi-layer coatings are available, compared to the Paintings of the prior art are improved.
  • the finishes should have no or only very few pinholes and / or an increased needlestick.
  • the pinhole limit is the dry layer thickness of the basecoat layer from which pinholes occur.
  • the invention also relates to the pigmented aqueous paints described above which can be used in stage (1) of the basecoat / clearcoat process.
  • step (1) of the process according to the invention it is possible in principle to employ all known aqueous basecoats if they contain at least one of the vinyl ethers defined above in an amount of from 0.1 to 5% by weight, based on the total weight of the basecoat.
  • Basecoats are referred to as "aqueous” when containing 30 to 70% by weight of water based on the total weight of the basecoat.
  • aqueous basecoat and “waterborne basecoat” are used in this application as synonymous terms.
  • the basecoats used according to the invention contain color and / or effect pigments.
  • basecoats which contain binders which are curable physically, thermally or thermally and with actinic radiation as binders.
  • binders which are curable physically, thermally or thermally and with actinic radiation
  • containing at least one saturated or unsaturated polyurethane resin as binder Such polyurethane resin-containing paints can also be cured usually physically, thermally or thermally and with actinic radiation.
  • physical curing means the formation of a film by the release of solvent from polymer solutions or polymer dispersions, usually without the need for crosslinking agents.
  • thermal curing means the heat-initiated crosslinking of a lacquer layer in which either a separately present crosslinking agent and / or self-crosslinking binder are used This is usually referred to as extraneous crosslinking by experts: If the complementary reactive functional groups or autoreactive functional groups, ie groups which react "with themselves", are already present in the binder molecules, self-crosslinking binders are present Complementary reactive functional groups and autoreactive functional groups are known from German patent application DE 199 30 665 A1, page 7, line 28, to page 9, lines 24.
  • actinic radiation includes electromagnetic radiation such as near infrared (NIR), visible light, UV radiation, X-radiation or ⁇ radiation, in particular UV radiation, and corpuscular radiation such as electron radiation, beta radiation, alpha radiation, proton radiation or neutron radiation, in particular Electron radiation, to understand. Curing by UV radiation is usually initiated by free-radical or cationic photoinitiators.
  • NIR near infrared
  • UV radiation visible light
  • UV radiation X-radiation or ⁇ radiation
  • corpuscular radiation such as electron radiation, beta radiation, alpha radiation, proton radiation or neutron radiation, in particular Electron radiation, to understand.
  • Curing by UV radiation is usually initiated by free-radical or cationic photoinitiators.
  • Basecoats which are curable thermally or thermally and with actinic radiation ie by means of "dual-cure" are preferred in the present invention, in particular those which contain a polyurethane resin as binder and an aminoplast resin or a blocked or unblocked crosslinking agent Polyisocyanate included.
  • a polyurethane resin as binder
  • an aminoplast resin or a blocked or unblocked crosslinking agent Polyisocyanate included.
  • the aminoplast resins melamine resins are particularly preferred.
  • Suitable saturated or unsaturated polyurethane resins are described, for example, in German Patent Application DE 199 1 1 498 A1, column 1, lines 29 to 49, and column 4, line 23, to column 11, line 5 of German Patent Application DE 199 48 004 A1 , Page 4, line 19, to page 13, line 48, European patent application EP 0 228 003 A1, page 3, line 24, to page 5, line 40, European patent application EP 0 634 431 A1, page 3, line 38 to page 8, line 9, or international patent application WO 92/15405, page 2, line 35, to page 10, line 32.
  • the polyurethane resins preferably contain for stabilization either functional groups which are neutralized by neutralizing agents and / or
  • Quaternizing agents can be converted into cations, and / or cationic groups or functional groups, which can be converted by neutralizing agents into anions, and / or anionic groups and / or nonionic hydrophilic groups.
  • the polyurethane resins are linear or contain branches. They can also be present as graft polymers. In this case they are preferred with acrylate groups grafted. The corresponding acrylate groups are preferably introduced into the polymer after preparation of a polyurethane primary dispersion.
  • Such graft polymers are well known to the person skilled in the art and are described, for example, in DE 199 48 004 A1.
  • JP 07-224130 A describes similar unsaturated polymers, namely polyesters and polyester urethanes for coating compositions to which vinyl ethers are attached via hydroxy or glycidoxy groups.
  • the polyurethane resin content is from 50 to 100% by weight, preferably from 50 to 90% by weight and particularly preferably from 50 to 80% by weight, based on the film-forming solids of the basecoat.
  • the polyurethane resin content is between 10 and 80% by weight, preferably between 15 and 75% by weight and more preferably between 20 and 70% by weight, based in each case on the film-forming solid of the basecoat.
  • R is an optionally substituted alkyl, cycloalkyl, aryl or alkaryl radical 4 to 18 carbon atoms, more preferably an alkyl or
  • % based on the total weight of the basecoat If the vinyl ether content is less than 0.1% by weight, the Invention underlying task is not solved. If the content is more than 5% by weight, it may be necessary to accept disadvantages, such as a deterioration in the liability of underbaked structures.
  • suitable substituents on the radical R are hydroxy radicals.
  • R is an alkyl radical, it may be branched or unbranched.
  • vinyl ethers particular preference is given to using n-butyl vinyl ether, tert-butyl vinyl ether, 2-ethylhexyl vinyl ether, dodecyl vinyl ether and cyclohexyl vinyl ether.
  • the basecoats used according to the invention may contain at least one additional additive.
  • additives are residue-free or substantially residue-free thermally decomposable salts, crosslinking agents such as the above-mentioned aminoplast resins and blocked or unblocked polyisocyanates, organic solvents, reactive diluents, transparent pigments, fillers, molecularly soluble dyes, nanoparticles, light stabilizers, antioxidants, deaerators, emulsifiers, Slip additives, polymerization inhibitors, free radical polymerization initiators, adhesion promoters, leveling agents, film forming aids, sag control agents (SCAs), flame retardants, corrosion inhibitors, waxes, desiccants, biocides, matting agents and thickeners.
  • SCAs sag control agents
  • Suitable thickeners are inorganic thickeners from the group of layered silicates.
  • inorganic thickeners it is also possible to use one or more organic thickeners.
  • organic thickeners These are preferably selected from the group consisting of (meth) acrylic acid (meth) acrylate copolymer thickeners, such as, for example, the commercial product Viscalex HV30 (Ciba, BASF) and polyurethane thickeners, such as, for example, the commercial product DSX® 1550 from Cognis.
  • (meth) acrylic acid (meth) acrylate copolymer thickener are referred to those which in addition to acrylic acid and / or methacrylic acid and one or more acrylic acid esters (that is, acrylates) and / or one or more methacrylic acid esters (ie methacrylates) in copolymerized form.
  • the (meth) acrylic acid (meth) acrylate copolymer thickeners have in common that these in alkaline medium, that is at pH> 7, in particular> 7.5 by salt formation of acrylic acid and / or methacrylic acid, that is by the Formation of carboxylate groups show a strong increase in viscosity.
  • ASE thickeners Alkali Soluble / Swellable Emulsion", alkaline-soluble / swellable emulsion or dispersion
  • acrylic acid- (meth) acrylate copolymer thickeners can also be used as so-called HASE thickeners ("hydrophobically modified anionic-soluble emulsions", hydrophobically modified anionic-soluble emulsion or dispersion).
  • HASE thickeners have an essentially thickening associative effect.
  • the usable (meth) acrylic acid (meth) acrylate copolymer thickeners are not suitable as binder resins because of their thickening properties, they therefore do not fall under the binder called physically, thermally or thermally and actinically curable binders and are therefore explicitly different to the poly (meth) acrylate based binders which can be used in the basecoat compositions of the invention.
  • Polyurethane thickeners are the associative thickeners known in the literature as HEUR ("Hydrophobically Modified Ethylene Oxide Urethane Rheology Modifiers", hydrophobically modified ethylene oxide-urethane rheology additives), which are chemically non-ionic branched or unbranched block copolymers of polyethylene oxide.
  • HEUR Hydrophobically Modified Ethylene Oxide Urethane Rheology Modifiers
  • hydrophobically modified ethylene oxide-urethane rheology additives hydrophobically modified ethylene oxide-urethane rheology additives
  • Chains (sometimes also polypropylene oxide chains) which are linked together via urethane bonds and which carry terminal long-chain alkyl or alkylene groups having 8 to 30 carbon atoms
  • Typical alkyl groups are for example dodecyl or stearyl groups, a typical alkenyl group is for example an oleyl group, a typical Aryl group is the phenyl group and a typical alkylated aryl group is, for example, a nonylphenyl group
  • the polyurethane thickeners are not suitable as physically, thermally or thermally and physically because of their thickening properties and structure usable binder resins. They are thus explicitly different from the polyurethanes used in The basecoat compositions according to the invention can be used as binders.
  • Suitable additives of the abovementioned type are known, for example, from German patent application DE 199 48 004 A1, page 14, line 4, to page 17, line 5, German patent DE 100 43 405 C1, column 5, paragraphs [0031] to [0033 ], known. They are used in the usual and known quantities.
  • the solids content of the basecoats used according to the invention may vary depending on the requirements of the individual case. In the first place, the solids content depends on the viscosity required for application, in particular spray application, so that it can be adjusted by the person skilled in the art on the basis of his general knowledge, if appropriate with the aid of less orienting tests.
  • the solids content of the basecoats is preferably from 5 to 70% by weight, more preferably from 10 to 65% by weight and particularly preferably from 15 to 60% by weight.
  • solids content is to be understood as meaning the proportion by weight which remains under evaporation as a residue under defined conditions.
  • the solid was determined according to DIN EN ISO 3251. The measurement duration was 60 min at 125 ° C.
  • the preparation of the basecoats used according to the invention can be carried out using the customary and known for the production of basecoats mixing methods and mixing units.
  • the basecoats according to the invention can be used both as one-component (1K), two-component (2K) or multi-component (3K, 4K) systems.
  • binders and crosslinkers are juxtaposed, i. in a component, before.
  • the prerequisite for this is that the two constituents crosslink together only at higher temperatures and / or when exposed to actinic radiation.
  • binders and crosslinking agents are present separately in at least two components, which are combined only shortly before application. This form is chosen when the binder and crosslinking agent react with each other already at room temperature. Paints of this type are mainly used for coating thermally sensitive substrates, in particular in automotive refinish.
  • the invention also relates to the use of the vinyl ethers used in the basecoats according to the invention for increasing the needlestick limit and / or for reducing the number of needlestickings in aqueous pigmented paints.
  • aqueous phase in Table A are stirred together in the stated sequence to form an aqueous mixture, and in the next step, an organic mixture is prepared from the components listed under "organic phase".
  • the organic mixture is added to the aqueous mixture.
  • the mixture is then stirred for 10 minutes and with the aid of deionized water and dimethanolamine to a pH of 8 and an injection viscosity of 58 mPas at a shear stress of 1000 / sec, as measured by a rotary viscometer (Rheomat RM 180 from Mettler-Toledo ) at 23 ° C, set.
  • polyurethane prepared according to page 7, Z. 55-S.8, Z. 23, 4,5 of DE-A-4437535
  • Polyester prepared according to Example D, column 16, Z. 37-59 3.2 of DE-A-4009858
  • polyurethane prepared according to p. 19, Z. 44-S. 20, Z. 20.4
  • Polyester prepared according to Example D, column 16, Z. 37-59 5
  • the waterborne basecoat 1 was admixed with 1.5 parts by weight of commercially available dodecylvinyl ether.
  • the aqueous basecoat 1 was admixed with 1.5 parts by weight of commercially available tert-butylvinyl ether.
  • the water-based lacquer E4 was admixed with 1.5 parts by weight of commercially available n-butyl vinyl ether.
  • the aqueous basecoat 1 was admixed with 1.5 parts by weight of commercially available 2-ethylhexyl vinyl ether.
  • aqueous basecoat E6 To prepare the aqueous basecoat E6 according to the invention, the aqueous basecoat 1 was admixed with 1.5 parts by weight of commercially available cyclohexyl vinyl ether.
  • the aqueous basecoat 1 was admixed with 1.5 parts by weight of commercially available octadecyl vinyl ether.
  • Table 1 Compositions of Waterborne Base Coatings (WBL) 1 and E2 - E7
  • the percentages by weight in Table 1 relate to the proportion of vinyl ether in the respective aqueous basecoat.
  • the multicoat paint systems were prepared according to the following general procedure:
  • a 30 x 50 cm sheet steel coated with a surfacer coating was provided with an adhesive strip on one longitudinal edge in order to be able to determine the layer thickness differences after coating.
  • the aqueous basecoat was applied wedge-shaped electrostatically.
  • the resulting Water-based paint layer was flashed off for one minute at room temperature and then dried for 10 minutes in a convection oven at 70 ° C.
  • On the dried aqueous basecoat a standard two-component clearcoat was applied.
  • the resulting clearcoat layer was flashed off at room temperature for 20 minutes.
  • the aqueous basecoat film and the clearcoat film were cured in a circulating air oven at 140 ° C for 20 minutes.
  • the layer thickness of the pinhole limit was determined. The results are shown in Table 2.
  • Table 2 Needle-stitch limit and number of pinholes of waterborne basecoat 1 and waterborne basecoats E2 to E7

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un laquage multicouche colorant et/ou à effet, selon lequel (1) une laque de base aqueuse pigmentée est appliquée sur un substrat, (2) un film polymère est formé à partir de la laque appliquée à l'étape (1), (3) une laque transparente est appliquée sur la couche de laque de base ainsi obtenue, puis (4) la couche de laque de base est durcie avec la couche de laque transparente. Le procédé selon l'invention est caractérisé en ce qu'une laque de base aqueuse pigmentée est utilisée à l'étape (1), qui contient au moins un éther de vinyle de formule générale R-O-CH=CH2, dans laquelle R représente un radical organique éventuellement substitué qui est choisi dans le groupe constitué par les radicaux alkyle, cycloalkyle, aryle et alkaryle contenant de 4 à 18 atomes de carbone, et la teneur en éther de vinyle de la laque de base est de 0,1 à 5 % en poids, par rapport au poids total de la laque de base.
EP11711829A 2010-03-24 2011-03-24 Procédé de fabrication d'un laquage multicouche colorant et/ou à effet Withdrawn EP2550339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010012449A DE102010012449A1 (de) 2010-03-24 2010-03-24 Verfahren zur Herstellung einer farb- und/oder effektgebenden mehrschichtigen Lackierung
PCT/EP2011/054563 WO2011117364A1 (fr) 2010-03-24 2011-03-24 Procédé de fabrication d'un laquage multicouche colorant et/ou à effet

Publications (1)

Publication Number Publication Date
EP2550339A1 true EP2550339A1 (fr) 2013-01-30

Family

ID=43885244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11711829A Withdrawn EP2550339A1 (fr) 2010-03-24 2011-03-24 Procédé de fabrication d'un laquage multicouche colorant et/ou à effet

Country Status (7)

Country Link
US (1) US20130202807A1 (fr)
EP (1) EP2550339A1 (fr)
JP (1) JP2013522032A (fr)
KR (1) KR20130018270A (fr)
CN (1) CN102803404B (fr)
DE (1) DE102010012449A1 (fr)
WO (1) WO2011117364A1 (fr)

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CN104520389B (zh) * 2012-08-07 2017-03-08 巴斯夫涂料有限公司 生产产生色彩和/或效果的多层涂层的方法
CN105312213B (zh) * 2015-11-30 2018-07-27 中国商用飞机有限责任公司北京民用飞机技术研究中心 一种采用温敏材料对民用客机外表面进行涂装的方法

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Also Published As

Publication number Publication date
CN102803404A (zh) 2012-11-28
KR20130018270A (ko) 2013-02-20
CN102803404B (zh) 2015-06-17
DE102010012449A1 (de) 2011-09-29
JP2013522032A (ja) 2013-06-13
US20130202807A1 (en) 2013-08-08
WO2011117364A1 (fr) 2011-09-29

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