EP2721085A1 - Dispersions de poluyrethanne aqueuses durcissables par rayonnement - Google Patents

Dispersions de poluyrethanne aqueuses durcissables par rayonnement

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Publication number
EP2721085A1
EP2721085A1 EP12725790.5A EP12725790A EP2721085A1 EP 2721085 A1 EP2721085 A1 EP 2721085A1 EP 12725790 A EP12725790 A EP 12725790A EP 2721085 A1 EP2721085 A1 EP 2721085A1
Authority
EP
European Patent Office
Prior art keywords
acid
acrylate
groups
compound
component
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Withdrawn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
EP12725790.5A
Other languages
German (de)
English (en)
Inventor
Reinhold Schwalm
Sebastian Roller
Peter THÜRY
Uwe Burkhardt
Sebastian Berger
Susanne Neumann
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 SE
Original Assignee
BASF SE
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Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP12725790.5A priority Critical patent/EP2721085A1/fr
Publication of EP2721085A1 publication Critical patent/EP2721085A1/fr
Withdrawn legal-status Critical Current

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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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
    • C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
    • C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
    • C08G18/348—Hydroxycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/67—Unsaturated compounds having active hydrogen
    • C08G18/671—Unsaturated compounds having only one group containing active hydrogen
    • C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/7806—Nitrogen containing -N-C=0 groups
    • C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/7806—Nitrogen containing -N-C=0 groups
    • C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
    • C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/81—Unsaturated isocyanates or isothiocyanates
    • C08G18/8141—Unsaturated isocyanates or isothiocyanates masked
    • C08G18/815—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen
    • C08G18/8158—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen
    • C08G18/8175—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen
    • 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
    • B05D3/06—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 exposure to radiation
    • B05D3/061—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 exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • 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
    • B05D7/06—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 wood
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31591—Next to cellulosic

Definitions

  • the present invention relates to UV-curable, aqueous polyurethane dispersions, a process for their preparation and their use.
  • Radiation-curable polyurethanes are used to coat wood-based materials, e.g. in the furniture industry, widely used. In addition to requirements such as high hardness, coatings in the furniture industry must above all emphasize the wood structure, an effect that is referred to as "tempering".
  • Water-dispersible, radiation-curable polyurethanes are e.g. known from
  • EP 753531 in which urethane acrylates based on polyester acrylates are produced
  • EP 942022 in which urethane acrylates based on acrylate group-containing prepolymers are produced.
  • the polyurethane acrylate dispersions described there show only insufficient emphasis on the wood structure.
  • the examples according to EP 753531 show a bad start, as in EP 1 142947, where Example A is detected as a comparative example.
  • Aqueous polyurethane dispersions with good priming are e.g. in EP 1 142947. This effect is attributed to the incorporation of a special monomer (hydroxypivalic neopentyl glycol ester). Although the systems described there show significantly improved tempering (rating 2) compared to the prior art, they still show room for improvement compared with the Laromer® PE 55W polyester acrylate (grade 0) used as a reference.
  • NMP N-methylpyrrolidone
  • the object is achieved by radiation-curable, water-dispersed polyurethanes, composed of a) at least one aliphatic di- or polyisocyanate, b) at least one compound having at least one isocyanate-reactive group and at least one free-radically polymerizable
  • C C double bond
  • the polyurethanes according to the invention ie the reaction products of the synthesis components a) to d) and optionally f) and g) have a double bond density of at least 1.5 mol / kg, preferably at least 1.8, more preferably at least 2.0, most preferably 2.2 mol / kg.
  • the dispersions according to the invention do not use compounds containing isocyanate groups in which the isocyanate groups have been partially or completely reacted with so-called blocking agents.
  • blocking agents are meant compounds which convert isocyanate groups into blocked (capped or protected) isocyanate groups, which then do not exhibit the usual reactions of a free isocyanate group below the so-called deblocking temperature.
  • the polyurethane dispersions according to the invention essentially no more free isocyanate groups after preparation, ie generally less than 1 wt .-% NCO, preferably less than 0.75, more preferably less than 0.66 and most preferably less than 0.3 wt .-% NCO (calculated with a molecular weight of 42 g / mol).
  • Component a) is at least one, for example one to three, preferably one to two and more preferably exactly one aliphatic di- or polyisocyanate.
  • Aliphatic isocyanates are those which have exclusively isocyanate groups bonded to those carbon atoms which are part of straight or branched acyclic chains, preferably those which have exclusively isocyanate groups which are bonded to straight or branched acyclic chains and are particularly preferred those which have exclusively bound to straight or branched, acyclic hydrocarbon chains isocyanate groups.
  • the aliphatic diisocyanates or polyisocyanates are preferably isocyanates having 4 to 20 C atoms.
  • customary diisocyanates are 1,4-tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, 2-methyl-1,5-diisocyanatopentane, 1,8-octamethylene diisocyanate, 1,10-decamethylene diisocyanate, 1 , 12-dodecamethylene diisocyanate, 1,14-tetradecamethylene diisocyanate, 2,2,4- and 2,4,4-trimethylhexane diisocyanate, 1, 3-bis (1-isocyanato-1-methylethyl) benzene (m-TMXDI), and derivatives of the Lysindiisocyanats. There may be mixtures of said diisocyanates.
  • 2,2,4- and 2,4,4-trimethylhexane diisocyanate are present, for example, as a mixture in a ratio of 1: 5: 1 to 1: 1, 5, preferably 1, 2: 1 - 1: 1, 2, particularly preferably 1, 1: 1 - 1: 1, 1 and most preferably 1: 1.
  • the polyisocyanates may be monomeric isocyanates having more than two isocyanate groups or oligomers of the above-mentioned diisocyanates.
  • An example of the former is triisocyanatononane (4-isocyanatomethyl-1,8-octane diisocyanate) or 2'-isocyanatoethyl- (2,6-diisocyanatohexanoate).
  • Examples of the latter are isocyanurate, biuret, uretdione, allophanate, iminooxadiazinetrione and / or carbodiimide-containing oligomers which are obtainable by oligomerization of at least one, preferably exactly one of the above-mentioned diisocyanates, more preferably by reacting 1,6 -Hexamethylendiisocyanat.
  • Preferred polyisocyanates are oligomers containing isocyanurate, uretdione and / or allophanate groups, more preferably oligomers containing isocyanurate and / or allophanate groups, and in a very particularly preferred embodiment the compound a) is an allophanate-containing oligomer based on 1, 6. Hexamethylene diisocyanate, in which 1,6-hexamethylene diisocyanate is reacted with at least a portion of compound b) to give an oligomer containing allophanate groups.
  • the polyurethanes of the invention of the synthesis components a) to d) and optionally f) and g) contain 1 to 30 wt .-%, preferably from 1 to 25 wt .-%, particularly preferably from 2 to
  • the component a) used according to the invention contains less than 5% by weight of uretdione.
  • R 3 is a divalent aliphatic or cycloaliphatic, preferably aliphatic radical, preferably hydrocarbon radical having 2 to 12, preferably 2 to 8, particularly preferably 2 to 4 carbon atoms,
  • R 4 is hydrogen or methyl, preferably hydrogen, and n can assume on statistical average 0 or a positive number, preferably values of 0 to 5, particularly preferably 0.5 to 3 and very particularly preferably 1 to 2.
  • R 3 examples of R 3 are 1,2-ethylene, 1,1-dimethyl-1,2-ethylene, 1,2-propylene, 1,3-propylene, 2-methyl-1,3-propylene, 2-ethyl-1 , 3-propylene, 2-butyl-2-ethyl-1, 3-propylene, 2,2-dimethyl-1, 3-propylene, 1, 2-butylene, 1, 3-butylene, 1, 4-butylene , 1, 5-pentylene, 1, 6-hexylene, 2-ethyl-1, 3-hexylene, 1, 8-octylene, 2,4-diethyl-1, 3-octylene or 1, 10-decylene, preferably 1, 2-ethylene, 1, 2-propylene, 1, 3-propylene or 1, 4-butylene, more preferably 1, 2-ethylene or 1, 2-propylene and most preferably 1, 2-ethylene.
  • This component preferably has an NCO content of 10 to 18, preferably 12 to 16 and particularly preferably 13 to 16% by weight and an average molecular weight of 600 to 1200, preferably 700 to 1000 and particularly preferably 700 to 900 g / mol.
  • Such compounds are commercially available, for example, under the trade name Laromer® 9000 from BASF SE, Ludwigshafen.
  • Preferred compounds of components b) are z.
  • ⁇ ⁇ -ethylenically unsaturated mono- and / or dicarboxylic acids and their anhydrides z.
  • acrylic acid methacrylic acid, fumaric acid, maleic acid, maleic anhydride, crotonic acid, itaconic acid, etc. are used. Preference is given to using acrylic acid and methacrylic acid, particularly preferably acrylic acid.
  • Suitable di- or polyhydric alcohols are, for. B.
  • diols such as ethylene glycol, 1, 2-propanediol, 1, 3-propanediol, 1, 1-dimethylethane-1, 2-diol, 2-butyl-2-ethyl-1, 3-propanediol, 2-ethyl 1, 3-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, hydroxypivalic acid neopentyl glycol ester, 1, 2, 1, 3 or 1, 4-butanediol, 1, 6-hexanediol, 1, 10-decanediol, Bis (4-hydroxycyclohexane) isopropylidene, tetramethylcyclobutanediol, 1, 2-, 1, 3- or 1, 4-cyclohexanediol, cyclooctanediol, norbornanediol, pinanediol, decalindiol, 2-ethy
  • Suitable triols and polyols have z. B. 3 to 25, preferably 3 to 18 carbon atoms. These include z. B. trimethylolbutane, trimethylolpropane, trimethylolethane, pentaerythritol, glycerol, ditrimethylolpropane, dipentaerythritol, ditrimethylolpropane, sorbitol, mannitol, diglycerol, Threit, erythritol, adonite (ribitol), arabitol (lyxite), xylitol, dulcitol (galactitol), maltitol or isomalt ,
  • the compounds of component b) are preferably selected from 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxybutyl acrylate, 3-hydroxybutyl methacrylate, 4-hydroxybutyl acrylate, 4-hydroxybutyl methacrylate, 6-hydroxyhexyl acrylate, 6-hydroxyhexyl methacrylate, 3-hydroxy-2-ethylhexyl acrylate, 3-hydroxy-2-ethylhexyl methacrylate, trimethylolpropane mono- or diacrylate, pentaerythritol di- or triacrylate and mixtures thereof.
  • the compound b) is particularly preferably selected from the group consisting of 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl acrylate and pentaerythritol triacrylate, very particularly preferably selected from the group consisting of Hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate and 2-hydroxypropyl methacrylate, and in particular, 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate.
  • the optional component c) is at least one compound having at least two, for example 2 to 4, preferably 2 to 3 and more preferably exactly 2 isocyanate-reactive groups which are selected from hydroxyl, mercapto, primary and / or secondary amino groups, preferably selected from the group consisting of hydroxyl and primary amino groups, more preferably are hydroxy groups.
  • the compounds c) are low molecular weight compounds having a molecular weight below 500 g / mol, preferably below 400 g / mol, more preferably below 250 g / mol.
  • the low molecular weight alcohols c) may be aliphatic or cycloaliphatic, preferably aliphatic.
  • the hydroxy groups may preferably be secondary or primary, preferably primary.
  • alcohols having 2 to 20 carbon atoms.
  • hydrolysis-stable short-chain diols having 4 to 20, preferably 6 to 12, carbon atoms.
  • the compounds c) are alkanediols.
  • Examples of compounds c) are ethylene glycol, 1, 2-propanediol, 1, 3-propanediol,
  • ethylene glycol 1, 2-propanediol, 1, 3-propanediol, neopentyl glycol, 1, 4-butanediol, 1, 6-hexanediol, 2,2-bis (4-hydroxycyclohexyl) propane, 1, 1 -, 1, 2 , 1, 3 and 1, 4-cyclohexanedimethanol, 1, 2, 1, 3 or 1, 4-cyclohexanediol, particularly preferred are ethylene glycol, 1, 2-propanediol, 1, 3-propanediol, neopentyl glycol, 1, 4-butanediol or 1,6-hexanediol.
  • no significant amounts of relatively high molecular weight diols or polyols having a molecular weight above 500 g / mol are used.
  • no essential amounts is meant that the proportion of the OH groups of the higher molecular weight di- or polyols in the total OH groups used from the compounds b), c), d) and f) not more than 20 mol% , preferably not more than 15 mol%, particularly preferably not more than 10, very particularly preferably not more than 5 and in particular 0 mol%.
  • the aforementioned components c) can be used individually or as mixtures.
  • Component d) is at least one, preferably exactly one compound having at least one, for example one to 3, preferably one or 2, more preferably exactly two isocyanate-reactive group and at least one, preferably exactly one acid group.
  • the acid groups of the compounds of component d) are preferably selected from among carboxylic acid groups, sulfonic acid groups, phosphonic acid groups and phosphoric acid groups. Preference is given to carboxylic acid and sulfonic acid groups, with particular preference being given to carboxylic acid groups.
  • Suitable compounds d) having at least one isocyanate-reactive group and at least one carboxylic acid or sulfonic acid group are in particular aliphatic monomercapto, monohydroxy and monoamino and iminocarboxylic acids and corresponding sulfonic acids such as mercaptoacetic acid (thioglycolic acid), mercaptopropionic acid, mercaptosuccinic acid, hydroxyacetic acid, Hydroxypropionic acid (lactic acid), hyrdicarboxylic acid, hydroxypivalic acid, dimethylolpropionic acid, dimethylolbutyric acid, hydroxydecanoic acid, hydroxydodecanoic acid, 12-hydroxy-stearic acid, N- (2'-aminoethyl) -3-aminopropionic acid,
  • Hydroxyethanesulfonic acid hydroxypropanesulfonic acid, mercaptoethanesulfonic acid, mercaptopropanesulfonic acid, aminoethanesulfonic acid, aminopropanesulfonic acid, glycine (aminoacetic acid), N-cyclohexylaminoethanesulfonic acid, N-cyclohexylaminopropanesulfonic acid, or iminodiacetic acid.
  • Dimethylolpropionic acid and dimethylolbutyric acid are preferred, and dimethylolpropionic acid is particularly preferred.
  • Component e) is at least one basic compound for neutralization or partial neutralization of the acid groups of the compounds d).
  • basic compounds e) for a neutralization or partial neutralization of the acid groups of the compounds d) are inorganic and organic bases such as alkali and alkaline earth hydroxides, oxides, carbonates, bicarbonates and ammonia or primary, secondary or tert.
  • Amines into consideration.
  • the neutralization or partial neutralization with amines such as with ethanolamine or diethanolamine and especially with tert.
  • Amines such as triethylamine, triethanolamine, dimethylethanolamine or
  • At least one further compound having an isocyanate-reactive group can be used as component f).
  • This group may be a hydroxyl, mercapto, or a primary or secondary amino group.
  • Suitable compounds f) are the customary compounds known to the person skilled in the art, which are usually used as so-called terminators for reducing the number of reactive free isocyanate groups or for modifying the polyurethane properties in polyurethane production. These include z.
  • Suitable components f) are also amines having a primary or secondary amino group, such as. Methylamine, ethylamine, n-propylamine, diisopropylamine, dimethylamine, diethylamine, di-n-propylamine, diisopropylamine, etc.
  • At least one polyisocyanate different from the compounds of components a) can be used as minor components in minor amounts as optional components g).
  • no polyisocyanates are used as components g) in which the isocyanate groups have been reacted with a blocking agent.
  • Preferred compounds g) are polyisocyanates having an NCO functionality of 2 to 4.5, more preferably 2 to 3.5.
  • component g) it is preferred to use aliphatic, cycloaliphatic and araliphatic diisocyanates. These may be, for example, the diisocyanates listed above under a), but are different from the compound a).
  • the compound g) is cycloaliphatic or aromatic, preferably cycloaliphatic di- and polyisocyanates.
  • Cycloaliphatic isocyanates are those having at least one isocyanate group bonded to a carbon atom which is part of a fully saturated ring system, preferably those having at least one isocyanate group bonded to a carbon atom which is part of a non-aromatic carbocycle , Aromatic isocyanates are those having at least one isocyanate group bonded to a carbon atom which is part of an aromatic ring system.
  • cycloaliphatic diisocyanates are 1, 4, 1, 3 or 1, 2-diisocyanatocyclohexane, 4,4'- or 2,4'-di (isocyanatocyclohexyl) methane, isophorone diisocyanate, 1, 3 or 1, 4 Bis (isocyanatomethyl) cyclohexane, 2,4-, and 2,6-diisocyanatoato-1-methylcyclohexane.
  • aromatic diisocyanates are 2,4- or 2,6-toluene diisocyanate, m- or p-xylylene diisocyanate, 2,4'- or 4,4'-diisocyanatodiphenylmethane, 1, 3- or 1, 4-phenylene diisocyanate, 1 -Chloro-2,4-phenylene diisocyanate, 1,5-naphthylene diisocyanate, diphenylene-4,4'-diisocyanate, 4,4'-diisocyanato-3,3'-dimethyldiphenyl diisocyanate, 3-methyldiphenylmethane-4, 4'-diisocyanate and diphenyl ether-4,4'-diisocyanate.
  • Isophorone diisocyanate, 1, 3- and 1, 4-bis (isocyanate-ethyl) cyclohexane, their isocyanurates, biurets and mixtures thereof are preferably used as component g).
  • the proportion of NCO groups of component g) to the total NCO groups used from the compounds a) and g) is not more than 20 mol%, preferably not more than 15 mol%, particularly preferably not more than 10, very particularly preferably not more than 5 and in particular 0 mol%.
  • the dispersion according to the invention may contain at least one further compound, as it is usually used as a reactive diluent.
  • a reactive diluent include z.
  • the reactive diluents as described in P.K.T. Oldring (Editor), Chemistry & Technology of UV & EB Formulations for Coatings, Inks & Paints, Vol. II, Chapter III: Reactive Diluents for UV & EB Curable Formulations, Wiley and SITA Technology, London 1997.
  • Reactive diluents are, for example, esters of (meth) acrylic acid with alcohols having 1 to 20 C atoms, for example (meth) acrylic acid methyl ester, (meth) acrylic acid ethyl butyl ester, (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl acrylate, 4-hydroxybutyl acrylate, dihydrodicyclopentadienyl acrylate, vinylaromatic compounds, eg styrene, divinylbenzene, ⁇ , ⁇ -unsaturated nitriles, eg acrylonitrile, methacrylonitrile, ⁇ , ⁇ -unsaturated aldehydes, for example acrolein, methacrolein, vinyl esters, for example vinyl acetate, vinyl propionate, halogenated ethylenically unsaturated compounds, for example vinyl chloride, vinylidene chlor
  • N-vinyl acetamide, N-vinyl-N-methylformamide and N-vinyl-N-methylacetamide or vinyl ethers for example methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, / so-propyl vinyl ether, n-butyl vinyl ether, se / -Butylvinylether , / so-butyl vinyl ether, feri-butyl vinyl ether, 4-hydroxybutyl vinyl ether, and mixtures thereof.
  • hexanediol diacrylate hexanediol dimethacrylate, octanedioldiacrylate, octanediol dimethacrylate, nonanediol diacrylate, nonanediol dimethacrylate, decanol diacrylate, decanediol dimethacrylate, pentaerythritol diacrylate, dipentaerythritol tetraacrylate, dipentaerythritol triacrylate, pentaerythritol tetraacrylate, etc.
  • esters of alkoxylated polyols with .alpha.,.
  • Beta.-ethylenically unsaturated Mono- and / or dicarboxylic acids such.
  • polyacrylates or methacrylates of alkoxylated trimethylolpropane, glycerol or pentaerythritol are also suitable.
  • esters of alicyclic diols such as cyclohexanediol di (meth) acrylate and bis (hydroxymethyl-ethyl) cyclohexanedi (meth) acrylate.
  • Suitable reactive diluents are trimethylolpropane monoformate lacrylate, glycerol formal acrylate, 4-tetrahydropyranyl acrylate, 2-tetrahydropyranyl methacrylate and tetrahydrofurfuryl acrylate.
  • Photoinitiators may be, for example, photoinitiators known to those skilled in the art, e.g. those in "Advances in Polymer Science", Volume 14, Springer Berlin 1974 or in K.K. Dietliker, Chemistry and Technology of UV and EB Formulation for Coatings, Inks and Paints, Volume 3; Photoinitiators for Free Radical and Cationic Polymerization, P.K.T. Oldring (Eds), SITA Technology Ltd, London.
  • Suitable examples include mono- or Bisacylphosphinoxide, as described for example in EP-A 7 508, EP-A 57 474, DE-A 196 18 720, EP-A 495 751 or EP-A 615 980, for example, 2.4 , 6-trimethylbenzoyldiphenylphosphine oxide (Lucirin ® TPO from BASF SE), ethyl 2,4,6-trimethylbenzoylphenylphosphinate (Lucirin ® TPO L from BASF SE), bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure® 819 BASF SE, Ciba Specialty Chemicals), benzophenones, hydroxyacetophenones, phenylglyoxylic acid and its derivatives or mixtures of these photoinitiators.
  • 6-trimethylbenzoyldiphenylphosphine oxide (Lucirin ® TPO from BASF SE)
  • Examples which may be mentioned are benzophenone, acetophenone, acetonaphthoquinone, methyl ethyl ketone, valophenone, hexanophenone, ⁇ -phenylbutyrophenone, p-morpholinopropiophenone, dibenzosuberone, 4-morpholinobenzophenone, 4-morpholinodeoxybenzoin, p-diacetylbenzene,
  • non-yellowing or slightly yellowing photoinitiators of the phenylglyoxalic acid ester type as described in DE-A 198 26 712, DE-A 199 13 353 or WO 98/33761.
  • Typical mixtures include, for example, 2-hydroxy-2-methyl-1-phenyl-propan-2-one and 1-hydroxycyclohexyl phenyl ketone, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide and 2 -Hydroxy-2-methyl-1-phenyl-propan-1-one, benzophenone and 1-hydroxycyclohexyl phenyl ketone, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide and 1-hydroxybenzoyl cyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide and 2-
  • photoinitiators are 2,4,6-trimethylbenzoyldiphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphinate, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, benzophenone, 1-benzoylcyclohexan-1-ol , 2-hydroxy-2,2-dimethyl-acetophenone and 2,2-dimethoxy-2-phenylacetophenone.
  • the dispersions of the invention contain the photoinitiators preferably in an amount of 0.05 to 10 wt .-%, more preferably 0.1 to 8 wt .-%, in particular 0.2 to 5 wt .-%, based on the total amount of the components a) to h).
  • the dispersions according to the invention preferably contain no thermal initiators.
  • Thermal initiators for the purposes of the present invention are those which have a half-life at 60 ° C of at least one hour.
  • the half-life of a thermal initiator is the time after the initial amount of the initiator has half decayed into free radicals.
  • Thermal initiators are preferably absent in accordance with the invention, ie they are present in amounts of less than 0.1% by weight.
  • the dispersions according to the invention may contain further paint-usual additives, such as leveling agents, defoamers, UV absorbers, dyes, pigments and / or fillers.
  • Suitable fillers include silicates, e.g., silicates obtainable by hydrolysis of silicon tetrachloride, such as Aerosil.RTM. From Degussa, silica, talc, aluminum silicates, magnesium silicates, calcium carbonates, etc.
  • Suitable stabilizers include typical UV absorbers, such as oxanilides, triazines and benzotriazole (the latter being available as Tiinnuv.RTM Brands of the former Ciba Specialty Chemicals, now BASF) and benzophenones.
  • radical scavengers for example sterically hindered amines such as 2,2,6,6-tetramethylpiperidine, 2,6-di-tert-butylpiperidine or derivatives thereof, eg. B. bis (2,2,6,6-tetra-methyl-4-piperidyl) seba-cinate, can be used.
  • Stabilizers are usually used in amounts of 0.1 to
  • Component k) Polyamines having 2 or more primary and / or secondary amino groups can be used above all when the chain extension or crosslinking is to take place in the presence of water, since amines generally react more quickly than alcohols or water with isocyanates. This is often required when aqueous dispersions of high molecular weight crosslinked polyurethanes or polyurethanes are desired. In such cases, the procedure is to prepare prepolymers with isocyanate groups, to rapidly disperse them in water and then to chain extend or crosslink them by adding compounds containing several isocyanate-reactive amino groups.
  • Amines suitable for this purpose are generally polyfunctional amines of the molecular weight range from 32 to 500 g / mol, preferably from 60 to 300 g / mol, which contain at least two primary, two secondary or one primary and one secondary amino group.
  • diamines such as diaminoethane, diaminopropanes, diaminobutanes, diaminohexanes, piperazine, 2,5-dimethylpiperazine, amino-3-aminomethyl-3,5,5-trimethyl-cyclohexane (isophoronediamine, IPDA), 4,4'-diaminodicyclohexylmethane , 1, 4-diaminocyclohexane, aminoethylethanolamine, hydrazine, hydrazine hydrate or triamines such as diethylenetriamine or 1, 8-diamino-4-aminomethyloctan or higher amines such as triethylenetetramine, tetraethylenep
  • the amines may also be in blocked form, e.g. in the form of the corresponding ketimines (see, for example, CA-1 129 128), ketazines (see, for example, US-A 4,269,748) or amine salts (see US-A 4,292,226).
  • Oxazolidines as used for example in US Pat. No. 4,192,937, also represent blocked polyamines which can be used for the preparation of the polyurethanes for chain extension of the prepolymers. When using such capped polyamines they are generally mixed with the prepolymers in the absence of water and this mixture is then mixed with the dispersion water or a portion of the dispersion water, so that the corresponding polyamines are hydrolytically released.
  • the solids content of the aqueous dispersions according to the invention is preferably in a range of about 5 to 70, preferably 20 to 60 wt .-%, particularly preferably 30 to 50 wt%.
  • Particularly preferred dispersions are those which, per kg of polyurethane, based on the sum of components a) to d) and e) to g), have a content of neutralized or free acid groups from d) of at least 0.4 mol, preferably min. at least 0.45 mol / kg.
  • organic solvents in particular of N-methylpyrrolidone, for dispersing can preferably be dispensed with, so that the VOC content of the dispersions according to the invention is not increased by these organic solvents.
  • the dispersions of the invention are particularly suitable as a coating composition or in coating compositions, particularly preferably for coating substrates such as wood, paper, textile, leather, fleece, plastic surfaces, glass, ceramics, mineral-looking building materials, such as cement blocks and fiber cement boards, and in particular of Metals or coated metals.
  • substrates such as wood, paper, textile, leather, fleece, plastic surfaces, glass, ceramics, mineral-looking building materials, such as cement blocks and fiber cement boards, and in particular of Metals or coated metals.
  • the dispersions of the invention can be used for coating wood and wood-based materials and wood-containing substrates, such as fiberboard.
  • the coating of cellulose fiber-containing substrates such as paper, cardboard or cardboard.
  • the dispersions are suitable for coating oak, spruce, pine, beech, maple, walnut, macore, chestnut, sycamore, ruby, ash, birch, pine and elm, and cork.
  • the dispersions according to the invention advantageously form films having good performance properties, in particular good hardness with sufficient elasticity and at the same time good priming.
  • the substrates are coated by customary methods known to those skilled in the art, at least one dispersion of the invention being applied to the substrate to be coated in the desired thickness and the volatile constituents of the dispersions removed by drying and / or flash-off at ambient or elevated temperature for example 60 ° C. If desired, this process can be repeated one or more times.
  • the application to the substrate can in a known manner, for. B. by spraying, filling, doctoring, brushing, rolling, rolling or pouring done.
  • the coating thickness is generally in a range of about 3 to 1000 g / m 2 and preferably 10 to 200 g / m 2 .
  • radiation curing takes place after each coating operation.
  • the radiation hardening takes place by the action of high-energy radiation, ie
  • UV radiation or daylight preferably light of wavelength 250 to 600 nm or by irradiation with high-energy electrons (electron radiation, 150 to 300 keV).
  • the radiation sources used are, for example, high-pressure mercury vapor lamps, lasers, pulsed lamps (flash light), halogen lamps or excimer radiators.
  • the radiation dose for UV curing, which is usually sufficient for crosslinking, is in the range from 80 to 3000 mJ / cm 2 .
  • the irradiation may optionally also in the absence of oxygen, for. B. under inert gas atmosphere, are performed. Suitable inert gases are preferably nitrogen, noble gases, carbon dioxide or combustion gases. Furthermore, the irradiation can be carried out by covering the coating composition with transparent media. Transparent media are z. As plastic films, glass or liquids, eg. B. water. Particularly preferred is irradiation in the manner described in DE-A1 199 57 900.
  • the curing is carried out continuously by passing the substrate treated with the preparation according to the invention at a constant speed past a radiation source.
  • a radiation source for this purpose, it is necessary that the curing rate of the preparation according to the invention is sufficiently high.
  • This different time course of the curing can be made use of in particular when the coating of the article is followed by a processing step in which the film surface comes into direct contact with another object or is mechanically processed.
  • the advantage of the dispersions according to the invention lies in the fact that it is possible to further process the coated objects immediately after radiation curing because the surface no longer sticks.
  • the dried film is still so flexible and stretchable that the article can still be deformed without the film flaking or cracking.
  • Example 3 from EP 1 142 947 was adjusted (polyurethane acrylate containing Laromer® PE 44F, BASF SE, dimethylolpropionic acid, neopentyl glycol, hydroxypivanic acid neopentyl glycol ester, isophorone diisocyanate and hexamethylene diisocyanate).
  • the solids were 38 +/- 2%.
  • the particle size was determined to be 54 nm.
  • Example 2 The procedure was as in Example 2 except that the 553 parts of Laromer® LR 9000 were replaced by a mixture of 290 parts of Laromer® LR9000 and 260 parts of an isocyanurate of isophorone diisocyanate (Vestanat® T1890 from Evonik).
  • the viscosity of the dispersion was 580 mPas and the particle size was less than 20 nm.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Nanotechnology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Paints Or Removers (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Abstract

La présente invention concerne des dispersions de polyuréthanne durcissables par rayonnement ultraviolet, leur procédé de production et leur utilisation.
EP12725790.5A 2011-06-14 2012-06-06 Dispersions de poluyrethanne aqueuses durcissables par rayonnement Withdrawn EP2721085A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12725790.5A EP2721085A1 (fr) 2011-06-14 2012-06-06 Dispersions de poluyrethanne aqueuses durcissables par rayonnement

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EP11169838 2011-06-14
EP12725790.5A EP2721085A1 (fr) 2011-06-14 2012-06-06 Dispersions de poluyrethanne aqueuses durcissables par rayonnement
PCT/EP2012/060644 WO2012171833A1 (fr) 2011-06-14 2012-06-06 Dispersions de poluyrethanne aqueuses durcissables par rayonnement

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PL2912084T3 (pl) 2012-10-24 2017-06-30 Basf Se Dyspergowalne w wodzie poliuretano(met)akrylany utwardzalne pod wpływem promieniowania
EP2757118A1 (fr) 2013-01-17 2014-07-23 Allnex Belgium, S.A. Compositions aqueuses durcissables par rayonnement avec séchage réversible
JP5780443B2 (ja) * 2013-03-29 2015-09-16 Dic株式会社 ウレタン樹脂組成物、コーティング剤及び物品
RU2015155963A (ru) * 2013-05-27 2017-07-04 Басф Се Способ получения уретан(мет)акрилатов
EP2942361A1 (fr) 2014-05-06 2015-11-11 Basf Se Amélioration de grain avec des agents tensioactifs dans des dispersions de polyuréthane durcissable aux uv à base d'eau
EP2960306B1 (fr) * 2014-06-26 2020-12-23 Agfa Nv Encres pour jet d'encre durcissables aqueuses
JP6075677B2 (ja) * 2014-06-30 2017-02-08 Dic株式会社 紫外線硬化性組成物
KR101974762B1 (ko) * 2014-12-04 2019-05-02 피알시-데소토 인터내쇼날, 인코포레이티드 화학 방사선에 의한 경화된 실란트의 제조 방법 및 관련 조성물
CN107001570B (zh) * 2014-12-17 2021-05-07 巴斯夫欧洲公司 基于链增长和交联的聚氨酯的可辐射固化的涂料组合物
JP7057876B2 (ja) * 2018-01-16 2022-04-21 Ｕｂｅ株式会社 水性脂溶性重合開始剤分散体、及び水性ポリウレタン樹脂分散体組成物
CN108329453B (zh) * 2018-03-07 2020-12-29 江阴市广豫感光材料有限公司 一种水性光固化树脂的制备方法
JP6965994B2 (ja) * 2018-06-25 2021-11-10 Dic株式会社 水性樹脂組成物及びその製造方法

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CN103608375B (zh) 2015-09-09
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JP2014519544A (ja) 2014-08-14
WO2012171833A1 (fr) 2012-12-20

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