EP4028431A1 - Radiation-curable (meth)acrylate-based paint system - Google Patents
Radiation-curable (meth)acrylate-based paint systemInfo
- Publication number
- EP4028431A1 EP4028431A1 EP20772041.8A EP20772041A EP4028431A1 EP 4028431 A1 EP4028431 A1 EP 4028431A1 EP 20772041 A EP20772041 A EP 20772041A EP 4028431 A1 EP4028431 A1 EP 4028431A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- meth
- acrylate
- radiation
- coating
- article
- 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.)
- Pending
Links
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 title claims abstract description 78
- 239000003973 paint Substances 0.000 title claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 82
- 239000011248 coating agent Substances 0.000 claims abstract description 54
- 239000000654 additive Substances 0.000 claims abstract description 35
- 230000000996 additive effect Effects 0.000 claims abstract description 29
- 239000000178 monomer Substances 0.000 claims abstract description 28
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000002904 solvent Substances 0.000 claims abstract description 27
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000003085 diluting agent Substances 0.000 claims abstract description 6
- 239000004922 lacquer Substances 0.000 claims description 65
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 125000001931 aliphatic group Chemical group 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 10
- 239000005871 repellent Substances 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 9
- 238000003848 UV Light-Curing Methods 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 8
- LHENQXAPVKABON-UHFFFAOYSA-N 1-methoxypropan-1-ol Chemical compound CCC(O)OC LHENQXAPVKABON-UHFFFAOYSA-N 0.000 claims description 7
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 229920000515 polycarbonate Polymers 0.000 claims description 7
- 239000004417 polycarbonate Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000012963 UV stabilizer Substances 0.000 claims description 6
- 229920002877 acrylic styrene acrylonitrile Polymers 0.000 claims description 6
- 230000003678 scratch resistant effect Effects 0.000 claims description 6
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 claims description 5
- 150000001298 alcohols Chemical class 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 230000006750 UV protection Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004132 cross linking Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000002318 adhesion promoter Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000002329 infrared spectrum Methods 0.000 claims description 3
- 239000006120 scratch resistant coating Substances 0.000 claims description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 3
- 238000001429 visible spectrum Methods 0.000 claims description 3
- 239000006059 cover glass Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 23
- 238000004140 cleaning Methods 0.000 description 17
- 239000004814 polyurethane Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 229920002635 polyurethane Polymers 0.000 description 12
- 230000007062 hydrolysis Effects 0.000 description 9
- 238000006460 hydrolysis reaction Methods 0.000 description 9
- 230000007774 longterm Effects 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000013065 commercial product Substances 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- YAAQEISEHDUIFO-UHFFFAOYSA-N C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 Chemical compound C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 YAAQEISEHDUIFO-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- 239000006223 plastic coating Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical class OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- -1 ethyl acetate Chemical class 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229920001002 functional polymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
-
- 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
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
Definitions
- the present invention relates to a radiation-curable paint system based on (meth) acrylate, comprising a paint component based on (meth) acrylate; a fluorinated monomer, oligomer or polymer as an additive; a siloxane monomer, oligomer or polymer as additive; and solvents and / or reactive diluents.
- a method for producing a radiation-cured (meth) acrylate lacquer coating for forming a surface on an article is provided.
- optical surfaces dust, dirt and other contaminants resulting from the environment form undesirable contaminants on these surfaces that must be removed.
- plastic coatings are also known as paints or films.
- the coatings also referred to below as polymer coatings or simple coatings are often coatings that have been cured after application, including epoxies, polyurethanes, polyacrylates, mixed systems such as isocyanate-cured hydroxyacrylates, polycarbonates and the like. can hold. The hardening usually takes place thermally or by radiation.
- These poly merlacke on the one hand reduce pollution and on the other hand improve the scratch resistance of these surfaces.
- the surfaces including optical surfaces should be scratch-resistant coatings on z.
- relatively soft synthetic materials such as polymethyl meth (acrylate), UV protective coatings and Antischlagbe coatings (for example, for instrument covers, optical surfaces in vehicle sensors and vehicle headlights and other articles) with at least partially transparent surfaces.
- Scratch-resistant and flexible UV resins with hard and soft fibers are described in the prior art.
- corresponding lacquer systems for UV lacquering in the automotive sector are used to increase the scratch resistance of polycarbonate diffusers in headlights.
- headlights is the resistance to Scratches an important aspect, damage and thus visual impairment, e.g. B. when cleaning vehicles in car washes, play an important role.
- EP 2 650 337 A1 describes flexible UV-curable coating compositions with a multifunctional acrylate monomer component and an amino-organofunctional silane component, organic solvent components, an acid, a colloidal silica component and multifunctional urethane acrylate oligomer component .
- these coatings do not meet the necessary requirements for the soiling of the surfaces.
- the object of the present invention is to provide suitable, radiation curable lacquer systems which are dirt-repellent and scratch-resistant as coatings for at least partially transparent surfaces, in particular in the outdoor area.
- these coatings also preferably have good resistance to hydrolysis.
- the coating is subject to high demands in terms of longevity and soiling behavior; it should have improved cleanability and long-term resistance to external weathering, especially with transparent surfaces. In the interior, it should show good hydrolysis resistance and a dirt-repellent effect.
- the radiation-curable paint system according to the invention based on (meth) acrylate enables a reduction in the soiling behavior with simultaneously improved cleanability.
- this lacquer system allows a long-term, scratch-resistant, but also flexible and crack-insensitive, permanent coating to be provided for surfaces, in particular at least partially optically transparent surfaces.
- the radiation-curable paint system according to the invention based on (meth) acrylate is one in which the (meth) acrylate-based paint component is based on (poly) urethane (meth) acrylate.
- the paint system is therefore a radiation-curable paint system based on (poly) urethane (meth) acrylate.
- the radiation-curable paint system according to the invention based on (meth) acrylate is one, the paint component being one with a first portion with a highly functionalized (meth) acrylate base, in particular a highly functionalized polyurethane (meth) acrylate base.
- a highly functionalized (meth) acrylate, in particular a polyurethane (meth) acrylate has a functionality of 6-10.
- the term “functionality” is understood to mean the number of bonds that a monomer or its repeating unit forms with other monomers in a polymer.
- the oligomer as a unit has a corresponding functionality.
- a second component is a paint component based on (meth) acrylate, in particular polyurethane (meth) acrylate, in particular polyurethane (meth) acrylate with low functionality, which has a functionality of 1-5.
- Exemplary compounds thereof are: aliphatic, high-functionality and low-functionality urethane (meth) acrylates, e.g. B. Ebecryl from Allnex.
- the aim of the development of the radiation-curable paint system according to the invention is to provide coatings that allow an improvement in cleaning, eg. B. by lowering the surface energy, as is achieved by coating such surfaces.
- plastic surfaces like such Polycarbonate, PMMA (polymethyl (meth) acrylate), SMMA (styrene-methyl (meth) acrylate), acrylonitrile-styrene-acrylate copolymer (ASA), polyurethane (PU) or polyester as surfaces, in particular at least partially optically transparent surfaces.
- the radiation-curable lacquer system according to the invention allows the formation of coatings that keep both reduced soiling and high scratch resistance allow a longer period of at least one year.
- these coatings obtained from the paint system according to the invention exhibit excellent resistance to hydrolysis. This is especially helpful indoors, since a dirt-repellent effect in combination with hydrolysis resistance in damp rooms or in rooms with increased pollution, such as in the kitchen area, with high humidity and possibly lipid-containing constituents in the air are desirable.
- Suitable surfaces are, in particular, transparent surfaces such as are present in the displays, in particular touch-sensitive displays, so-called touch displays.
- the coatings according to the invention formed from the paint systems according to the invention show an increased dirt-repellent effect with simultaneous hydrolysis resistance.
- the fluorinated monomer, oligomer or polymer additive is one that includes a fluorinated (poly) urethane (meth) acrylate oligomer e.g. B. is an aliphatic (poly) urethane (meth) acrylate.
- oligomers permit particularly good binding to the other components of the radiation-curable lacquer system according to the invention, in particular since the lacquer component is methacrylate-based, in particular (poly) urethane (meth) acrylate-based, such as aliphatic embodiments thereof.
- This fluorinated monomer, oligomer or Polymer additive improves the hydrophobicity and oligophobicity of the coating obtainable with the radiation-curable paint system and thus allows a reduction in soiling behavior.
- the silicone-based additives i. H. the siloxane monomer, oligomer or polymer additives oligomers, in particular oligomers based on (meth) acrylate, such as oligomers of siloxane-polyurethane (meth) acrylate.
- Suitable silicone-based additives allow co-polymerization with the paint component and the fluorine-based additive.
- the radiation-curable lacquer system according to the present invention forms different areas in the coating itself. It is assumed that the uppermost area of this coating, the outer surface, in particular has a higher proportion of the fluorine-based additive, while the siloxane (silicone) -based additives are present in combination with the paint component in the area below.
- the solvent present in the radiation-curable paint system according to the invention and / or the reactive diluent are in one embodiment at least one solvent of a mixture of two alcohols, in particular a combination of methoxypropanol and ethanol.
- suitable alcohol-based solvents are, for example, propanol or ethylene glycol butyl ether.
- the lacquer system according to the invention can furthermore have a solvent of an ester, such as ethyl acetate.
- esters such as ethyl acetate, allow the coating to bond better to the surface of the article to be coated.
- the term “reactive thinner” is understood to mean components or substances that reduce the viscosity of a lacquer for processing and become part of the lacquer during the subsequent curing of the lacquer through copolymerization.
- Suitable reactive diluents include 1,6-hexanediodiacrylate or trimethylolpropane triacrylate.
- the radiation-curable lacquer system according to the invention can contain other customary ingredients, such as UV absorbers and UV stabilizers. Suitable components also include UV stabilizers such as HALS. Suitable UV absorbers are known UV absorbers, such as. B. Hostavin from Clariant.
- the radiation-curable lacquer system according to the invention also has corresponding photoinitiators which, after being excited by UV light, initiate the curing of the lacquer system.
- Suitable photoinitiators include, for example, 1-hydroxycyclohexyl phenyl ketone.
- the (meth) acrylate-based radiation-curable lacquer system according to the invention is one, the proportion of (meth) acrylate-based lacquer components being 15 to 30% by weight, based on the total amount of the lacquer system and / or the amount of solvents and / or reaction thinner is 50 to 80% by weight, based on the total amount of the paint system.
- the radiation-curable lacquer system according to the invention based on methacrylate comprises:
- Solvents comprising mixtures of alcohols and esters, preferably comprising ethyl acetate, methoxypropanol and ethanol, as well as reactive diluents;
- the fluorinated monomer oligomer or polymer is used as an additive in an amount between 0.01% by weight to 5% by weight, such as 0.05 to 3% by weight z. B. 0.07 to 2% by weight, based on the total amount of the paint system.
- the siloxane additive especially in the form of the siloxane monomer, oligomer, or polymer based on (meth) acrylate, such as polyurethane (meth) acrylate, is in a range from 0.01% by weight to 5% by weight such as 0.1 to 4 wt.%, e.g. B. 0.25% by weight to 3% by weight based on the total amount of the paint system.
- the ratio of siloxane additive to fluorinated additive is in a range from 1: 2 to 3: 1 based on percent by weight.
- UV absorber UV stabilizer and photoinitiator, if any, are used in customary amounts; these corresponding amounts are known to the person skilled in the art.
- the solvent is one of a mixture of methoxypropanol, ethanol and ethyl acetate, the proportions of methoxypropanol are greater than the proportions of the ethanol, the proportions of the ethanol are greater than the proportions of the ethyl acetate.
- the proportions of methoxypropanol to ethanol are in a range from 1.1: 1 to 5: 1 and the proportions of ethanol to ethyl acetate are in a range from 1.1: 1 to 5: 1.
- the radiation-curable lacquer system according to the invention can additionally contain an adhesion promoter.
- Such coupling agents include aminosilanes.
- Coating systems with higher proportions of solvents allow flooding and the obtaining of coatings with a smaller thickness.
- the lacquer system can also have nanoparticles.
- the present invention provides a method for producing a preferably flexible and preferably crack-insensitive radiation-hardened (meth) acrylate lacquer coating for the permanent formation of a surface, in particular a dirt-repellent and scratch-resistant surface, with preferably chemical and UV-resistant properties, in one article, comprising:
- Coatings as the surface of an article with excellent properties in terms of scratch resistance but also soiling behavior are provided.
- the method according to the invention allows the production of bendable and crack-insensitive coatings for the permanent formation of this coating as a surface.
- This surface is preferably one that has chemical and / or UV-resistant properties.
- These coatings can be at least partially and completely formed on at least one surface of the article.
- the radiation-curable lacquer system according to the invention is provided by mixing the components. Mixing takes place according to known methods. Mixing is preferably carried out under UV protection.
- This mixture is then applied to the article to be coated.
- the application can take place wholly or partially on the article or the substrate.
- the application takes place at a temperature of preferably 10 ° C to 30 ° C.
- the application is carried out according to known methods. These coating processes include application of the lacquer system to the article by flooding, spraying, dipping, spinning, knife coating or roll-to-roll.
- a coating process is selected depending on the article to be coated.
- the coating is preferably carried out in such a way that no UV radiation, in particular with UV protection, the radiation-curable lacquer system is applied to the article.
- the solvent is evaporated off.
- This evaporation usually involves heating the coated article.
- This heating is an increase in the temperature during the step of applying the radiation-curable lacquer system according to the invention and an evaporation step with heating.
- the heating is particularly one to 25 ° C to 90 ° C, such as 25 ° C to 60 ° C or 40 ° C to 80 ° C.
- the heating can take place slowly, for example with a temperature change of a maximum of 3 ° C. per minute, such as a maximum of 2 ° C. per minute.
- evaporation or flashing off of the solvent can already take place for the application of the paint system and, for example, take place at a first temperature, such as the ambient temperature during application, for at least 2 minutes, e.g. for a maximum of 24 hours, and then with heating, as described.
- a first temperature such as the ambient temperature during application
- this layer is a functional polymer layer with several areas.
- an uppermost area which forms the surface of the coating on the outside, there are in particular the fluorinated additives together with the (meth) acrylate-based paint component, in particular PU (meth) acrylate-based.
- the siloxane monomer, oligomer or polymer additives are enriched together with the (meth) acrylate-based paint component, in particular PU (meth) acrylate-based.
- a penetration layer also preferably forms, which is also referred to as an IPL layer (intrapenetretion layer).
- This penetration layer is a layer that penetrates into the article to be coated, so that there is a mixed area of the components of the coating system and the article to be coated. This results in better adhesion.
- the training of the IPL is z. B. promoted by appropriate solvents, such as ethyl acetate. The ethyl acetate allows z. B. to etch the surface of the article or substrate so that the lacquer system can form the IPL layer with the substrate. The same effects are possible with reactive thinners or with the appropriate conditions during the curing process.
- this penetration layer between the coating and the article to be coated is 0.5 pm to 3 pm thick, such as. B. 1 pm.
- the coating itself is one with a layer thickness of 5 to 25 ⁇ m, e.g. B. 8 to 20 pm, such as 10 to 15 pm.
- the evaporation or flashing off of the solvent takes place, for. B. in a heating device, such as an oven.
- the heating to evaporate the solvent takes place for at least 2 minutes, such as for at least 3 minutes. In a further embodiment, the heating takes place for a maximum of 8 minutes, such as a maximum of 5 minutes 2 to 5 min. As a result, the penetration layer between the coating and the article or substrate to be coated is formed particularly well.
- the coated article or the coated substrate is crosslinked by means of UV radiation.
- This UV irradiation also referred to as UV curing, takes place in one embodiment such that the energy input has at least 2000 mJ / cm 2 , such as at least 3000 mJ / cm 2 z. B. at least 4000 mJ / cm 2 , in particular at least 5000 mJ / cm 2 .
- the energy input is chosen so that UV curing is as complete as possible in order to guarantee scratch resistance. However, too much energy input can lead to increased brittleness of the paint system.
- UV curing can immediately follow the heating to evaporate the solvent, so that the coated article is still in the heated state.
- Radiation crosslinking can also take place at room temperature after the coated article has cooled down, for. B. take place during transport from the place of heating to the place of radiation crosslinking.
- the UV curing can e.g. B. by means of UV lamps, such as a mercury lamp, he follow.
- the coating of the substrate thus obtained according to the invention is distinguished by high scratch resistance.
- the soiling behavior is reduced and the coating is clear and transparent.
- an improved pixel-free and effect-free coating is achieved, which has excellent long-term stability.
- the hydrolysis resistance is also IN ANY.
- the substrate or the article itself can be pretreated in one embodiment, e.g. B. the article or the substrate is pretreated by ionized compressed air or plasma treatment.
- the surface of the article can be cleaned with suitable fluids, such as alcohols, for example isopropanol.
- a coated article obtainable according to the invention is provided.
- This at least partially coated article synonymously hereinafter also referred to as coated substrate, obtainable with the process according to the invention, is characterized by a dirt-repellent and scratch-resistant and possibly hydrolysis-resistant coating.
- it has good hydrolysis resistance and is preferably also resistant to chemicals and UV.
- the articles and substrates coated according to the invention are moreover permanently coated and resistant to external weathering. They are also distinguished by the fact that they preferably have excellent flexibility and are not susceptible to cracking.
- Such bendability and insensitivity to cracks is particularly important in the case of articles that are under tension or are bent during installation or use. This applies in particular to headlights or sensor covers as well as lights.
- the flexibility with simultaneous crack sensitivity is essential in order to ensure a high level of resistance to environmental influences and external weathering.
- the coated article is one that is at least partially optically transparent in the IR and VIS spectrum. Resistance and flexibility in the case of crack insensitivity is particularly relevant for transparent covers of headlights or sensors.
- the coated article is an optical lens, a cover glass, spectacle lenses, prisms, a disk, a plastic article, in particular a headlight, a lamp or a sensor, lamp parts, motor vehicle parts, or measuring devices.
- the coated article can also be an at least partially transparent display, such as a touch-sensitive display, a so-called touch display.
- a touch-sensitive display a so-called touch display.
- Such articles with appropriate surfaces are used nowadays in a wide variety of areas, such as. B. also in wet room areas or in Be rich increased pollution, z. B. in the kitchen, in the bathroom, etc.
- the coated article or the coated substrate is one on a plastic article or plastic substrate.
- This plastic article or this plastic substrate is formed from polycarbonate, PMMA (polymethyl methacrylate), SMMA (styrene methyl methacrylate), ASA (acrylonitrile-styrene-acrylate copolymer), polyurethane (PU), polyester or mixtures thereof.
- the coated surface is optically transparent, especially in the IR and VIS spectrum. In one embodiment it is a headlight, in particular in the automotive sector, in another embodiment it is a matter of sensors, in particular those that are used outdoors. These sensors include optical sensors including cameras.
- the present invention provides the use of the preferably bendable and preferably crack-insensitive, radiation-curable lacquer system according to the present invention for coating at least partially optically transparent articles made of glass and / or plastic.
- These articles or substrates are in particular special headlights and sensors.
- the use according to the invention is particularly suitable as a coating that is used both outdoors and indoors.
- UV-curing hard coat is used as a reference coating (UVHC
- the parameters were determined in accordance with a standard from the automotive sector, TL211.
- the TL52437 for headlights in outdoor areas and the TL226 were used as additional test criteria.
- the cleanability via the adhesion process and the cleanability and chemical resistance were determined using TL211.
- the weather resistance was tested according to PV1200 in accordance with TL 211 with 20 cycles.
- test was carried out as follows: Using permanent marker, a line about 2 cm long is applied to a coated substrate. This is dried for 1 min at RT. Then clean the substrate by wiping the substrate once with a cloth.
- Figure 1 Test results of the cleaning attempt with UVHC 3000 K before (a) and after cleaning (d), after climate change test (PV 1200, 20 cycles) (g), inventive lacquer composition before (b) and after cleaning (e), after climate change test (PV 1200, 20 cycles) (h); Composition according to the invention before (c) and after cleaning (f). The following tests were carried out for further validation:
- FIG. 2 the scratch resistance is shown as a microscope image after conditioning with 20 cycles according to PV1200.
- FIG. 2a shows the scratch resistance of the commercially available comparative coating
- FIG. 2b shows the scratch resistance of the coating according to the invention.
- a corrugation can be seen in the scratch track, while in FIG. 2b only a slight impression track can be seen.
- a method for determining the scratch resistance is described with a constant load.
- the resistance to the penetration of a test syringe is determined.
- the method can alternatively be carried out as a “yes / no” test with only one specified load or with the aim of determining a minimum load under which the test probe penetrates the coating to the substrate.
- FIGS. 3a, 3c and 3e show the removability of a commercial product, while better removal of the contamination is possible with the product according to the invention under the same conditions, see FIGS. 3b, 3d and 3f.
- the tree resin consists of a 1: 1 mixture of rosin and pine oil and was dried at 80 ° C. for 4 hours after application. It was then first wiped dry (3c, 3d) and then wiped with water (3e, 3f).
- FIGS. 4a and 4b show the soiling (4a) after drying and after cleaning in the case of the commercial product (4b), the figures 4c and 4d show the results with a coating according to the invention after application (4c) and after drying and cleaning by means of compressed air (4d).
- the advantageous properties of the lacquer system according to the invention can be clearly seen. This is characterized by a reduced protection behavior and improved cleanability. In addition, it has better long-term resistance to outdoor exposure.
- coated surfaces were used on a polycarbonate substrate and mounted on a vehicle over a year and tested in a driving test over approx. 48,000 kilometers. It was found that approx. 40% more area remains transparent, i.e. i.e., are less polluted. In addition, it was shown that the determination of the transmission properties was less soiling than conventional coatings.
- the UVHC 3000 K from Momentive described above was used as the conventional coating.
- FIG. 5 shows the transmission properties of the transparent, coated substrates after the driving test before and after cleaning. It can be clearly seen that the coating composition according to the invention as a coating shows improved transmission compared to the comparison with conventional coating systems, here UVHC 3000 K. After cleaning the coated surfaces, both coating systems showed essentially the same transmission spectra.
- FIG. 6 shows the degree of cleaning of the surface in comparison with the conventional product.
- the degree of cleaning means that a corresponding proportion of the area that has been treated with the paint composition according to the invention is contaminated by insects compared to conventional surfaces. On average, 40% more area was unpolluted and therefore transparent.
Abstract
Description
Claims
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Application Number | Priority Date | Filing Date | Title |
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DE102019124648.2A DE102019124648A1 (en) | 2019-09-13 | 2019-09-13 | Radiation-curable lacquer system based on (meth) acrylate |
PCT/EP2020/075590 WO2021048433A1 (en) | 2019-09-13 | 2020-09-14 | Radiation-curable (meth)acrylate-based paint system |
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EP4028431A1 true EP4028431A1 (en) | 2022-07-20 |
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EP20772041.8A Pending EP4028431A1 (en) | 2019-09-13 | 2020-09-14 | Radiation-curable (meth)acrylate-based paint system |
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US (1) | US20240043696A1 (en) |
EP (1) | EP4028431A1 (en) |
DE (1) | DE102019124648A1 (en) |
WO (1) | WO2021048433A1 (en) |
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WO2008047977A1 (en) * | 2006-10-16 | 2008-04-24 | Cheil Industries Inc. | Coating composition for low refractive layer, anti-reflection film using the same and image displaying device comprising said anti-reflection film |
CN103374246A (en) | 2012-04-13 | 2013-10-30 | Sdc科技有限公司 | Flexible uv-curable coating compositions |
EP2875082B1 (en) * | 2012-07-20 | 2016-06-01 | Basf Se | Fast-drying, radiation-curable coating compounds |
CN103073934B (en) * | 2012-12-28 | 2015-07-22 | 上海维凯光电新材料有限公司 | Ultraviolet curing anti-fingerprint coating for acrylic and composite material base material thereof |
DE102013004925B4 (en) | 2013-03-22 | 2017-11-09 | Gxc Coatings Gmbh | Substrates with anti-fog coating, associated manufacturing process, components or bodies and use of an amphiphilic substance |
WO2014208323A1 (en) * | 2013-06-28 | 2014-12-31 | 横浜ゴム株式会社 | Resin compositions for forming hard coating layer |
CN104845521B (en) * | 2015-06-15 | 2017-06-13 | 张家港康得新光电材料有限公司 | UV is coating material solidified, wear-resisting nonpolluting coating and the safeguard film for cellular phone containing wear-resisting nonpolluting coating |
BR112018014761B1 (en) * | 2016-01-21 | 2022-08-30 | Basf Coatings Gmbh | RADIATION CURABLE COATING AGENT, METHOD FOR PRODUCING A SCRATCH-RESISTANT COATING, USE OF A COATING AGENT, AND, SUBSTRATE |
JP6755153B2 (en) * | 2016-09-13 | 2020-09-16 | スリーエム イノベイティブ プロパティズ カンパニー | Cosmetic film |
CN108384438A (en) * | 2018-03-14 | 2018-08-10 | 湖南宏泰新材料有限公司 | A kind of resistance to steel wool anti-fingerprint nanometer UV coating of anodic oxidation |
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