EP2007835A1 - Uv-curing protective coat for thermoplastic substrates - Google Patents
Uv-curing protective coat for thermoplastic substratesInfo
- Publication number
- EP2007835A1 EP2007835A1 EP07723623A EP07723623A EP2007835A1 EP 2007835 A1 EP2007835 A1 EP 2007835A1 EP 07723623 A EP07723623 A EP 07723623A EP 07723623 A EP07723623 A EP 07723623A EP 2007835 A1 EP2007835 A1 EP 2007835A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- alkyl
- layer
- derivatives
- product according
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
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- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
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- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/259—Silicic material
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- 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]
- Y10T428/31507—Of polycarbonate
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- 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.]
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- 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]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
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- 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]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
- Y10T428/31797—Next to addition polymer from unsaturated monomers
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- 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]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31935—Ester, halide or nitrile of addition polymer
Definitions
- the present invention relates to a multi-layered product wherein the first layer is a UV-cured protective layer containing SiO 2 nanoparticles, and wherein the second layer includes a thermoplastic substrate. Moreover, the invention relates to the composition of the UV-curable first layer, a process for producing the multi-layered products and products, such as glazings, which contain said multi-layered products.
- polycarbonate has the disadvantage that it is not inherently UV-stable.
- the sensitivity curve of bisphenol A polycarbonate has the highest sensitivity between 320 nm and 330 ⁇ m. Below 300 nm, no solar radiation reaches the earth, and above 350 nm, this polycarbonate is so insensitive that yellowing no longer takes place.
- UV stabilizers which are known to be used in coatings are UV absorbers, such as 2-hydroxy-benzophenones, 2- (2-hydroxyphenyl) benzotriazoles, 2- (2-hydroxyphenyl) -1, 3,5-tri -azine, 2-cyanoacrylates and oxalanilides, and free-radical scavengers of the HALS-type (dered amine light stabilizer).
- UV absorbers such as 2-hydroxy-benzophenones, 2- (2-hydroxyphenyl) benzotriazoles, 2- (2-hydroxyphenyl) -1, 3,5-tri -azine, 2-cyanoacrylates and oxalanilides
- HALS-type free-radical scavengers of the HALS-type (dered amine light stabilizer).
- EP-A 0 424 645 discloses a UV-curable lacquer based on acrylates and colloidal silica, in which UV absorbers, explicitly a benzophenone, a cyanoacrylate and a benzotriazole type, as well as radical scavengers of the HALS type possible additives be mentioned.
- UV absorbers explicitly a benzophenone, a cyanoacrylate and a benzotriazole type, as well as radical scavengers of the HALS type possible additives be mentioned.
- EP-A 0 576 247 discloses a UV-curable lacquer based on colloidal silica, silyl acrylate, acrylate, 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Lucirin TPO from BASF AG) as photoinitiator and UV absorbers. If desired, sterically hindered amines of the HALS type, fluoroacrylate and alkyl acrylate can be used as additives.
- the UV absorbers are mentioned with Cyasorb ® UV-416, Cyasorb ® UV-531, Cyasorb ® UV 5411, Tinuvin ® 328 and Univul ® 400 explicitly three benzophenone and two Benzotriazoltypen.
- No. 5,468,789 discloses a UV-curable lacquer based on colloidal silica, alkoxysilyl acrylate, acrylate monomer and a specific gelation inhibitor, it being possible where appropriate for UV absorbers such as resorcinol monobenzoate and 2-methylresorcinodibenzoate to be present.
- the first layer In order to achieve a sufficient protective function for the second layer, it is necessary for the first layer to filter out or absorb as much as possible the ultraviolet light that is harmful for the second layer as completely as possible.
- UV light having a wavelength of 300 to 340 nm should therefore be filtered out or absorbed as completely as possible from the first layer.
- both a corresponding amount of a UV absorber with the highest possible absorption coefficient in the first layer as well as a sufficiently large layer thickness of the first layer are necessary.
- This high UV filter effect of the UV absorber competes for the UV light-initiated curing of the first layer with the photoinitiator for the light required for the formation of radicals.
- radical scavengers such as HALS as light stabilizers represents a further complication, since they can absorb the radicals required for the radical start of the crosslinking and formed by UV irradiation from the initiator.
- the present invention has for its object to provide multilayer products with a UV-sensitive substrate such as polycarbonate as a second layer and a UV-curable scratch and abrasion resistant protective layer as the first layer, which is characterized by an effective UV protection and high Distinguish abrasion resistance.
- a paint formulation comprising at least one specific photoinitiator selected from the group consisting of acylphosphine oxide derivatives and ⁇ -aminoalkylphenone derivatives, which forms the first layer of the multilayered product after application and curing.
- UV stabilizers such as, for example, triazine derivatives and optionally radical scavengers of the HALS class is impaired.
- the abrasion resistance of the multilayer products according to the invention with UV protection implemented is at the same level as corresponding multilayer products with siloxane-based protective coating systems.
- the invention thus relates to a multilayer product comprising a first layer (S1) and a second layer (S2), wherein the first layer is a lacquer obtainable from
- A.l) containing urethane or ester bonds aliphatic oligomers are having at least two acrylate functions per molecule or mixtures of corresponding oligomers and
- alipatic reactive diluents are having at least two acrylate groups per molecule or mixtures of corresponding reactive diluents
- At least one organic UV absorber selected from the group consisting of triazine derivatives and biphenyltriazine derivatives, preferably at least one UV absorber of the biphenyltriazine derivatives,
- thermoplastic polymer is a thermoplastic polymer
- the components of the first layer (S1) are used in the following proportions:
- the amount of solvent (component F) is such that an experimentally determined solids content of 20 to 50 wt .-%, preferably 30 to 40 wt .-% for the mixture of components A, B and F results.
- component E 0 to 5, preferably 0.1 to 1% by weight of component E used.
- the aliphatic polymer precursors according to component A are selected from at least one of the groups consisting of the components A.l and A.2, where
- A.l) containing urethane or ester bonds aliphatic oligomers are having at least two acrylate functions per molecule or mixtures of corresponding oligomers and
- Alipatic reactive diluents are with at least two acrylate groups per molecule or mixtures of corresponding reactive diluents.
- Suitable polymer precursors according to component A having at least two acrylate groups per molecule are preferably those of the formula
- R 1 and R 2 independently of one another are H or C 1 to C 30 -alkyl, preferably H, methyl or ethyl and
- R 3 in the case of polymer precursors according to component A.1 is an n-valent organic radical which consists of urethane or ester bonds linked aliphatic hydrocarbon units, or
- R 3 in the case of polymer precursors according to component A.2 is an n-valent organic radical, preferably having 1 to 30 carbon atoms.
- aliphatic urethane acrylates as Ebecryl ® 4858, Ebecryl ® 284, Ebecryl ® 265, Ebecryl ® 264 (manufacturer in each Cytec Surface Specialties), Craynor ® 925 from Cray Valley, Viaktin ® 6160 from Vianova Resin, Roskydal® ® 2258 from Bayer MaterialScience AG, Photomer ® 6891 from Cognis or in reactive diluents dissolved aliphatic urethane acrylates such as Laromer ® 8987 (70% in hexanediol diacrylate) from BASF AG, Roskydal ® 2308 (80% in hexanediol
- Suitable reactive diluents according to component A.2 are known and are described in Chemistry & Technology of UV & EB Formulation for Coatings, Inks & Paints, Vol. 2, 1991, SITA Technology, London (PKT: Oldring (Ed.))
- Suitable for the purposes of the invention are, for example, methanediol diacrylate, 1,2-ethanediol diacrylate, 1,3-propanediol diacrylate, 1,2-propanediol diacrylate, glycerol triacrylate, 1,4-butanediol diacrylate, 1,3-propanediol diacrylate.
- 1,6-hexanediol diacrylate, tricyclodecanedimethanol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate and their methacrylate derivatives Preference is given to using 1,6-hexanediol diacrylate, tricyclodecane dimethanol diacrylate, and their methacrylate derivatives, in particular in a mixture with component A.1.
- Component B comprises finely divided inorganic compounds, these preferably consisting of at least one polar compound of one or more metals of the 1st to 5th main group or 1st to 8th subgroup of the Periodic Table, preferably the 2nd to 5th main group or 4th to 8th Subgroup, particularly preferably from 3rd to 5th main group or 4th to 8th subgroup, or from compounds of these metals with at least one element selected from oxygen, hydrogen, sulfur, phosphorus, boron, carbon, nitrogen or silicon.
- Preferred compounds are, for example, oxides, hydroxides, hydrous oxides, sulfates, sulfites, sulfides, carbonates, carbides, nitrates, nitrites, nitrides, borates, silicates, phosphates, hydrides, phosphites or phosphonates.
- the finely divided inorganic compounds preferably consist of oxides, phosphates, hydroxides, preferably of TiO 2 , SiO 2 , SnO 2 , ZnO, ZnS, ZrO 2 , Al 2 O 3 , AlO (OH), boehmite, aluminum phosphates, furthermore TiN, WC, Fe 2 O 3 , iron oxides, NaSO 4 , vanadium oxides, zinc borate, silicates such as Al silicates, Mg silicates, one-, two-, three-dimensional silicates. Mixtures and doped compounds are also usable.
- hydrated aluminas e.g., boehmite
- silica Particularly preferred is silica.
- the finely divided inorganic compounds in the sense according to the invention have an average particle size (d 50 value) of 1 to 200 nm, preferably 5 to 50 nm, particularly preferably 7 to 40 nm.
- the finely divided inorganic compounds have a narrow particle size distribution with a ((d 90 -dio ) / d 50 ) value of the distribution of less than or equal to 2, particularly preferably from 0.2 to 1.0.
- the particle size is determined by analytical ultrafiltration, where d 90 is the 90%, di 0 is the 10% value and d 50 is the mean value of the integral mass. senverotti the particle size is. The use of analytical ultracentrifugation for particle size determination is described in HG Müller Progr. Colloid Polym. Be. 2004, 127, pages 9-13.
- the surface of these finely divided inorganic compounds is modified with the aid of alkoxysilane compounds.
- R and R ' a monovalent organic radical, preferably an alkyl chain having 1 to 30 carbon atoms,
- R 1 and R 2 independently of one another are H or C 1 to C 30 -alkyl, preferably H, methyl or ethyl,
- R 4 is a divalent organic radical, preferably an alkyl chain, having 1 to 30 carbon atoms and
- R 5 is a monovalent organic radical, preferably an alkyl chain having 1 to 30 carbon atoms, and more preferably methyl and ethyl
- the following acrylate-functionalized trialkoxysilane compounds are particularly preferably used for surface modification of the finely divided inorganic compounds: (3-methacryloxypropyl) trimethoxysilanes, (3-acryloxypropyl) trimethoxysilanes, (3-methacryloxypropyl) triethoxysilanes, methacryloxymethyltriethoxysilanes and methacryloxymethyltrimethoxysilanes.
- the finely divided inorganic compound is used as a dispersion in at least one component selected from the group consisting of A) and F). Preference is given to finely divided inorganic compounds which are dispersible agglomerate-free in the coating formulation.
- UV absorbers according to the invention are derivatives of triazine, preferably derivatives of biphenyltriazine. Particular preference is given to using UV absorbers according to the following formula (IV),
- X is OR 6 , OCH 2 CH 2 OR 6 , OCH 2 CH (OH) CH 2 OR 6 or OCH (R 7 ) COOR 8 , preferably OCH (R 7 ) COOR 8 ,
- R 6 branched or unbranched Ci-C 3 alkyl, C 2 -C 2 -alkenyl, C ö -C 2 -aryl or -CO-C r C I8 - alkyl,
- R 7 H or branched or unbranched C 1 -C 8 -alkyl, preferably CH 3 and
- R 8 C r C 2 alkyl; C 2 -C 2 alkenyl or C 5 -C 6 cycloalkyl, preferably C 8 H n .
- the biphenyl-substituted triazines of the general formula (IV) are known from WO-A 96/28431; DE-A 197 39 797; WO-A 00/66675; US 6,225,384; US 6,255,483; EP-A 1 308 084 and DE-A 101 35 795 known in principle.
- the UV absorbers have a high UV absorption in the range of the greatest sensitivity of the second layer, particularly preferably the UV absorbers have a UV absorption maximum between 300-340 nm.
- Component D in the sense of the invention are so-called HALS systems (hindered amine light stabilizers). This achieves further stabilization.
- HALS systems are amines according to the formula (V),
- R 6 branched or unbranched Ci-C ] 3 alkyl, C 2 -C 2 o-alkenyl, C ⁇ -C ⁇ -aryl or -CO-C] -C 18 alkyl, and
- R 9 is ZR 10 -ZR n , Z - R i o- Z or
- Z a divalent functional group such as C (O) O, NH or NHCO
- C CH-Ph-OCH 3 ,
- R " is H or C 1 -C 20 -alkyl.
- Component E in the sense of the invention are preferably all those leveling agents which allow both a good wetting of the paint formulation on the surface of the second layer, as well as a visually appealing surface of the first layer formed during curing of the paint formulation.
- An overview of common leveling agents are Janos Hajas "Leve- ling Additives” in additives in coatings, Johan Bieleman (Edt.), Wiley-VCH Verlag GmbH, Weinheim 2000, pp 164-179.
- the leveling agent BYK ® is preferably 300 used by BYK Chemie.
- Component F in the sense of the invention are solvents or solvent mixtures which must be compatible to the extent with the second layer, as well as to the extent dispersing, applying and venting the paint formulation must allow that after UV curing of the paint formulation to the actual first layer, a multi-layered product is obtained with high transparency and low turbidity.
- These may be, for example and preferably, alkanes, alcohols, esters, ketones or mixtures of the above. Particular preference is given to using alcohols (with the exception of methanol), ethyl acetate and butanone. Very particular preference is given to solvents or solvent mixtures selected from min. at least one of the group consisting of diacetone alcohol (CH 3 ) 2 C (OH) CH 2 C (OO) CH 3 , ethyl acetate, methoxypropanol and butanone.
- Component G is at least one photoinitiator selected from the group consisting of acylphosphine oxide derivatives and ⁇ -aminoalkylphenone derivatives of the formula VI (acylphosphine oxides) or VII ( ⁇ -aminoalkylphenone),
- R 12 C J - C 30 - alkyl, each optionally substituted by Cj to C4 alkyl, and / or chlorine, bromine-substituted C5 to Cg-cycloalkyl, Cg-C2 () - aryl, Cg-C2 () - aryloxy or C7 to Cj 2-
- Aralkyl preferably phenyl, CH 2 CH (CH 3 ) CH 2 C (CH 3 ) B or
- R Ci - C 30 - alkyl, Cj - C 30 - alkoxy, each optionally substituted by Cj to C ⁇ alkyl, C ⁇ to C4 alkoxy, C ⁇ to C4-acyl and / or chlorine, bromine, C5 to Cg-cycloalkyl , Cg to C20-aryl, Cg to C20 "aryloxy, C7 to C2i-aroyl or C7 to C3-aralkyl
- R 14 C 1 to C 4 -alkyl, C 1 to C 1 -alkoxy, preferably CH 3 or OCH 3
- n 0 to 5, preferably 0, 2 or 3,
- radicals R 17 and R 18 can also be linked to form a ring, so that deLui formula (VII) nitrogen N is part of a heterocyclic ring system,
- R 19 C 1 to C 3Q-alkoxy, C 1 to C 30 -alkylthio, C 1 to C 30 -dialkylamino, in each case optionally C 1 to C 1 -alkyl-, and / or chlorine, bromine-substituted C 5 to C 9 -cycloalkyl, where the C Atoms of the ring can also be substituted by heteroatoms such as N, O or S,
- component G bis (2,4,6-trimethyl- benzoyl) phenylphosphine oxide (Irgacure ® 819 from Ciba Specialty Chemicals), (2,4,6-trimethyl benzoyl) diphenyl phosphine oxide (Lucirin ® TPO from Solid BASF AG), bis (2,6-dimethylbenzoyl) (2,4,4-trimethylpentyl) phosphine oxide, bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide, benzoylphosphonic acid bis (2, 6-dimethylphenyl) ester (Lucirin ® 8728 from BASF
- VHa bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide (Irgacure ® 819 from Ciba Specialty Chemicals), 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide (Lucirin ® TPO-L from BASF AG) and 2-methyl-l- [ 4- (methylthio) phenyl] -2-mo ⁇ holino-l-propanone (Irgacure ® 907 from Ciba Specialty Chemicals) was used.
- the photoinitiators according to the invention have a high photochemical reactivity and an absorption band in the near UV range.
- Mixtures are preferred of bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide and (l-hydroxycyclohexyl) phenylmethanone, preferably in the ratio 25: 75 (Irgacure ® 1800 by Ciba Specialty Chemicals), or a mixture of bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide and 2-hydroxy-2-methyl-l -phenyl-1 - propanone, preferably in the ratio 25: 75 (Irgacure ® 1700 by Ciba Specialty Chemicals) used.
- Thermoplastic polymers of the second layer in the sense of the invention are polycarbonate, polyester carbonate, polyesters (such as polyalkylene terephthalate), polyphenylene ethers, graft copolymers (such as ABS) and mixtures thereof.
- the second layer is preferably polycarbonate, in particular homopolycarbonate, copolycarbonate and / or thermoplastic polyester carbonate.
- M w average molecular weights of from 18,000 to 40,000, preferably from 22,000 to 36,000 and in particular from 24,000 to 33,000, determined by measuring the relative solution viscosity in dichloromethane or mixtures of equal amounts by weight of phenol / o-dichlorobenzene calibrated by light scattering.
- the polycarbonates are preferably prepared by the phase boundary process or the melt transesterification process and will be described below by way of example using the phase boundary process.
- Preferred compounds to be used as starting compounds are bisphenols of the general formula (VUI)
- R is a divalent organic radical of 6 to 30 carbon atoms containing one or more aromatic groups.
- Examples of such compounds are bisphenols which belong to the group of dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, indanebisphenols, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) ketones and ⁇ , ⁇ '-bis (hydroxyphenyl) - diisopropylbenzenes.
- Particularly preferred bisphenols belonging to the aforementioned linking groups are bisphenol-A, tetraalkylbisphenol-A, 4,4- (meta-phenylenediisopropyl) -diphenol (bisphenol M), 4,4- (para-phenylenediisopropyl) diphenol, l, l Bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (BP-TMC) and optionally mixtures thereof.
- the bisphenol compounds to be used according to the invention are preferably reacted with carbonic acid compounds, in particular phosgene, or with diphenyl carbonate or dimethyl carbonate in the melt transesterification process.
- Polyestercarbonates are preferably obtained by reacting the abovementioned bisphenols, at least one aromatic dicarboxylic acid and optionally carbonic acid equivalents.
- Suitable aromatic dicarboxylic acids are, for example, phthalic acid, terephthalic acid, isophthalic acid, 3,3'- or 4,4'-diphenyldicarboxylic acid and benzophenone dicarboxylic acids.
- a portion, up to 80 mole%, preferably from 20 to 50 mole%, of the carbonate groups in the polycarbonates may be replaced by aromatic dicarboxylic acid ester groups.
- Inert organic solvents used in the interfacial process include, for example, dichloromethane, the various dichloroethanes and chloropropane compounds, tetrachloroethane. Methane, trichloromethane, chlorobenzene and chlorotoluene, preferably chlorobenzene or dichloromethane or mixtures of dichloromethane and chlorobenzene are used.
- the interfacial reaction can be accelerated by catalysts such as tertiary amines, in particular N-alkylpiperidines or onium salts.
- catalysts such as tertiary amines, in particular N-alkylpiperidines or onium salts.
- Tributylamine, triethylamine and N-ethylpiperidine are preferably used.
- the catalysts mentioned in DE-A 4 238 123 are preferably used.
- the polycarbonates can be deliberately and controlled branched by the use of small amounts of branching.
- Some suitable branching agents are: phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hepten-2; 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) heptane; 1, 3,5-tri (4-hydroxyphenyl) benzene; 1,1,1-tri- (4-hydroxyphenyl) -ethane; Tri- (4-hydroxyphenyl) -phenylrnethan; 2,2-bis [4,4-bis (4-hydroxyphenyl) -cyclohexyl] -propane; 2,4-bis- (4-hydroxyphenyl-isopropyl) -phenol; 2,6-bis- (2-hydroxy-5'-methyl-benzyl) -4-methyl phenol; 2- (4-hydroxyphenyl) -2- (2,4-dihydroxyphenyl) -propane; Hexa-
- the optionally used 0.05 to 2 mol%, based on diphenols, of branching agents or mixtures of the branching agents can be used together with the diphenols but can also be added at a later stage of the synthesis.
- the chain terminators used are preferably phenols such as phenol, alkylphenols such as cresol and 4-tert-butylphenol, chlorophenol, bromophenol, cumylphenol or mixtures thereof in amounts of 1 to 20 mol%, preferably 2 to 10 mol% per mol of bisphenol. Preference is given to phenol, 4-tert-butylphenol or cumylphenol.
- Chain terminators and branching agents may be added separately or together with the bisphenol to the syntheses.
- polycarbonates for the second layer of the multilayer product according to the invention are the homopolycarbonate based on bisphenol A, the homopoly- carbonate based on 1,1-bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the copolycarbonates based on the two monomers bisphenol A and 1,1-bis- (4-hydroxyphenyl) -3, 3,5-trimethylcyclohexane.
- the homopolycarbonate based on bisphenol A is particularly preferred.
- the polycarbonate may contain stabilizers.
- Suitable stabilizers are, for example, phosphines, phosphites or Si-containing stabilizers and further compounds described in EP-A 0 500 496. Examples which may be mentioned are triphenyl phosphites, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris (nonylphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylene diphosphonite and triaryl phosphite. Particularly preferred are triphenylphosphine and tris (2,4-di-tert-butylphenyl) phosphite.
- the polycarbonate-containing second layer of the multi-layered product according to the invention may contain from 0.01 to 0.5% by weight of the esters or partial esters of monohydric to hexahydric alcohols, in particular glycerol, pentaerythritol or guerbet alcohols.
- Monohydric alcohols include stearyl alcohol, palmityl alcohol and Guerbet alcohols.
- a dihydric alcohol is glycol.
- a trivalent alcohol is, for example, glycerine.
- tetrahydric alcohols include pentaerythritol and mesoerythritol.
- pentavalent alcohols are arabitol, ribitol and xylitol.
- Hexahydric alcohols include mannitol, glucitol (sorbitol) and dulcitol.
- the esters are preferably the monoesters, diesters, triesters, tetraesters, pentaesters and hexaesters or mixtures thereof, in particular random mixtures, of saturated, aliphatic Cio to C 36 -monocarboxylic acids and optionally hydroxy-monocarboxylic acids, preferably with saturated, aliphatic C 14 to C 32 Monocarboxylic acids and optionally hydroxy-monocarboxylic acids.
- the commercially available fatty acid esters may contain ⁇ 60% of different partial esters as a result of the preparation.
- Saturated, aliphatic monocarboxylic acids having 10 to 36 carbon atoms are, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, hydroxystearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid and montanic acids.
- Preferred saturated aliphatic monocarboxylic acids having 14 to 22 carbon atoms are, for example, myristic acid, palmitic acid, stearic acid, hydroxystearic acid, arachic acid and behenic acid.
- saturated aliphatic monocarboxylic acids such as palmitic acid, stearic acid and hydroxystearic acid.
- the saturated, aliphatic C 10 to C 36 -carboxylic acids and the fatty acid esters are either known from the literature or can be prepared by processes known from the literature.
- pentaerythritol fatty acid esters are those of the particularly preferred monocarboxylic acids mentioned above.
- Particularly preferred are esters of pentaerythritol and glycerol with stearic acid and palmitic acid.
- the multi-layered product according to the invention may comprise further layers, in particular a further UV protective layer (S3) which contains a UV stabilizer according to formula (IV).
- S3 which contains a UV stabilizer according to formula (IV).
- the layer sequence in this case is (S1) - (S2) - (S3), and the layers (S1) and (S3) may have the same or different compositions.
- the multilayered products according to the invention may contain organic dyes, inorganic color pigments, fluorescent dyes and particularly preferably optical brighteners.
- the invention is also a paint available from
- A.l aliphatic oligomers containing urethane or ester bonds are with at least two acrylate functions per molecule or mixtures of corresponding oligomers and
- alipatic reactive diluents are having at least two acrylate groups per molecule or mixtures of corresponding reactive diluents
- the invention also provides a process for producing a multilayered product, wherein
- the first layer S1 in the form of a paint formulation is applied to the second layer S2, which is preferably a plastic molding of any shape produced from the thermoplastic polymer according to S2 by injection molding or extrusion, and
- the coating formulation on the surface of the second layer by flooding, dipping, spraying, rolling or spinning is applied, and then preferably at room temperature and / or elevated temperature (at 20 to 200 0 C, particularly preferably at 40 - 120 0 C) ventilated.
- the surface of the second layer may be pretreated by purification or activation.
- the curing of the first layer by means of UV light wherein as a UV light source preferably a mercury vapor lamp, or alternatively doped variants (for example with gallium or iron) are used.
- a UV light source preferably a mercury vapor lamp, or alternatively doped variants (for example with gallium or iron) are used.
- the invention also relates, in particular, to multilayer products which contain a plastic molding as layer S2, which is preferably made of thermoplastic polymer by means of injection molding or extrusion, and coated with the paint according to Sl and, if appropriate, with a further layer S3.
- a plastic molding as layer S2 which is preferably made of thermoplastic polymer by means of injection molding or extrusion, and coated with the paint according to Sl and, if appropriate, with a further layer S3.
- this multi-layered product represents a glazing such as architectural glazings, automotive trim, headlamp lenses, spectacle lenses or helmet visors.
- Component AB-I Nanocryl ® Xp21 / 1372 of Hanse Chemie AG containing Viaktin ® 6160, an aliphatic urethane hexaacrylate from Vianova Resin, and a solids content of 40 wt .-% finely divided SiO 2 with an average particle size (d 5 o value) of 23.5 nm and a ((d 9 o -dio) / d 5 o) value of 0.66).
- HDDA 1, 6-hexanediol diacrylate
- Component C UV absorber CGL479 from Ciba Specialty Chemicals.
- Component D UV absorber CGL479 from Ciba Specialty Chemicals.
- DI component HALS system Tinuvin ® 123 from Ciba Specialty Chemicals.
- Component D-2 HALS system Tinuvin ® 144 from Ciba Specialty Chemicals.
- Component E leveling agent BYK ® 300 from BYK Chemie
- Component GI Irgacure ® 184 from Ciba Specialty Chemicals (comparison)
- Component G-2 Irgacure ® 819 from Ciba Specialty Chemicals
- Component G-3 Irgacure ® 1800 from Ciba Specialty Chemicals
- Component G-4 Darocure ® 1173 from Ciba Specialty Chemicals (comparative)
- Component G-5 Irgacure ® 651 from Ciba Specialty Chemicals (comparative)
- Component G-6 Lucirin ® TPO-L from BASF AG
- component G 5 wt .-% (based on the amount of component AB used) of the component G, wherein the type and composition are shown in mixtures of Table 1, and
- PC polycarbonate used (PC) plates in optical quality from Makrolon ® 2808 (Bayer MaterialScience AG; medium-viscosity bisphenol A polycarbonate, MVR log / Lomin according to ISO 1133 at 300 0 C and 1.2 kg without UV stabilization) of the size I x 10 x 15 x 0.32 cm Ih were annealed at 120 0 C, rinsed with isopropanol, flashed, UV pretreated (with a laboratory UV lamp KTR 2061 hackemack, belt speed 3 m / min and at a UV dose ( Hg lamp) of 1.7 J / cm2, measured with a dosimeter eta plus UMD-I) and then treated with ionized air.
- Makrolon ® 2808 Boyer MaterialScience AG; medium-viscosity bisphenol A polycarbonate, MVR log / Lomin according to ISO 1133 at 300 0 C and 1.2 kg without UV stabilization
- the UV-curable lacquer formulation from a) was applied in a flooding process under the conditions described in Table 1, column "curing conditions.”
- the coated panels are then ventilated and then twice at a belt speed of 4 m / min Laboratory UV emitter KTR 2061 from Hackemack was cured at a UV dose (Hg lamp) of 2.6 J / cm 2, measured with a dosimeter eta plus UMD I.
- the thickness of the transparent coating thus obtained was determined by means of of an Eta SD 30 from Eta Optik GmbH (for values, see Table 1, column "layer thickness").
- the initial Haze value of the UV cured first layer coated PC board was determined according to ASTM D 1003 with a Haze Gard Plus from Byk-Gardner.
- the coated side of the sample was then scratched using a Taber Abraer model 5131 from Erichsen according to ISO 52347 or ASTM D 1044 using the CS10F wheels (type II, pink color).
- a ⁇ haze value was determined.
- a PC plate coated with silica gel SHP401 / AS4000 of GE Bayer Silicons was scratched under the same conditions, whereby a ⁇ haze value (reference) was obtained. This results in the relative Taber value of the multi-layered products of
- the first layer should have a sufficiently high scratch resistance. This criterion is achieved in accordance with the invention if the relative Taber value is less than or equal to two.
- the UV spectrum of the coating ie the first layer of the multilayer product
- the absorbance value for the first layer measured at a wavelength of 340 nm is listed in Table 1 together with the layer thickness of this first layer at exactly the extinction measuring point.
- the object was to achieve an extinction of> 1.5 for the first layer measured at 340 nm and layer thicknesses of approximately 5 ⁇ m.
- compositions of Comparative Examples 1, 2 and 8 gave sticky layers, the remaining compositions of (Comparative) Examples 3-7 and 9-32 performed the adhesion tests performed, i. there was no demolition of the coating (rating "0" according to ISO 2409 or "5B” according to ASTM D 3359).
- Comparative Examples 1, 2, 8, 9, 10, 13, 14 and 19 do not meet the scratch and abrasion resistance requirement of the first layer of the multi-layered product.
- An efficient crosslinking or curing of the first layer resulting in a high scratch and abrasion resistance is when the multilayer product after 1000 revolutions with CSlOF wheels (Taber Abraser test) has a turbidity increase in the form of a relative Taber value of ⁇ 2, the siloxane-based hardcoat (AS4000 from GE Bayer Silicons) is considered a reference in terms of abrasion resistance.
- photoinitiators such as 2,2-dimethoxy-2-phenylacetophenone (Irgacure ® 651 from Ciba Specialty Chemicals; component G5) or the representatives of the ⁇ -hydroxyalkylphenone class, such as the 1-hydroxy-cyclohexyl-phenyl-ketone ( Irgacure ® 184 from Ciba Specialty Chemicals, component Eq) and the ⁇ -hydroxy- ⁇ , ⁇ -dimethylacetophenone (Darocur ® 1173 from Ciba Specialty Chemicals; component G4) alone result in the used here paint formulations with a high UV-filter effect (extinction> 1 5 for the first layer measured at 340 nm and layer thicknesses of about 5 ⁇ m) did not result in efficient curing (Comparative Examples 1, 2, 8, 9, 10, 13, 14 and 19).
- Adhesion test for the multilayer structure (a) Tape test without and with crosshatch according to ISO 2409 or ASTM D3359 and (b) Tape test on crosshatch after water storage of the sample in 65 +/- 2 ° C warm water according to ISO 2812-2 or ASTM 870-02 (the test is passed even if there is no delamination on the 10th day of water storage after crosshatch tape testing); "Ok” means that in both tests (a) and (b), no firing occurs, that is, in test a) "0" rating according to ISO 2409 and "5B” according to ASTM D, respectively
- ⁇ haze value (reference) absorbance only of the coating (uncoated Makrolon ® 2808 as a reference); behind it is the layer thickness at the measuring point (located at the edge of the plate (partly directly at the drip edge, which is why here partly larger layer thicknesses are measured compared to the measurement at (5)).
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- Condensed Matter Physics & Semiconductors (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE200610016642 DE102006016642A1 (en) | 2006-04-08 | 2006-04-08 | UV-curing protective layer for thermoplastic substrates |
PCT/EP2007/002677 WO2007115678A1 (en) | 2006-04-08 | 2007-03-27 | Uv-curing protective coat for thermoplastic substrates |
Publications (1)
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EP2007835A1 true EP2007835A1 (en) | 2008-12-31 |
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ID=38100796
Family Applications (1)
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EP07723623A Withdrawn EP2007835A1 (en) | 2006-04-08 | 2007-03-27 | Uv-curing protective coat for thermoplastic substrates |
Country Status (12)
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US (1) | US8753739B2 (en) |
EP (1) | EP2007835A1 (en) |
JP (1) | JP5190447B2 (en) |
KR (1) | KR101440635B1 (en) |
CN (1) | CN101466805B (en) |
BR (1) | BRPI0710646A2 (en) |
CA (1) | CA2648463A1 (en) |
DE (1) | DE102006016642A1 (en) |
MX (1) | MX2008012963A (en) |
RU (1) | RU2008143913A (en) |
TW (1) | TW200808540A (en) |
WO (1) | WO2007115678A1 (en) |
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KR20110029881A (en) * | 2009-09-16 | 2011-03-23 | 한국전자통신연구원 | Plastic substrates and methods of forming the same |
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- 2007-03-27 KR KR1020087027388A patent/KR101440635B1/en active IP Right Grant
- 2007-03-27 BR BRPI0710646-7A patent/BRPI0710646A2/en not_active IP Right Cessation
- 2007-03-27 EP EP07723623A patent/EP2007835A1/en not_active Withdrawn
- 2007-03-27 WO PCT/EP2007/002677 patent/WO2007115678A1/en active Application Filing
- 2007-03-27 CA CA 2648463 patent/CA2648463A1/en not_active Abandoned
- 2007-03-27 JP JP2009504595A patent/JP5190447B2/en not_active Expired - Fee Related
- 2007-03-27 MX MX2008012963A patent/MX2008012963A/en unknown
- 2007-03-27 RU RU2008143913/04A patent/RU2008143913A/en not_active Application Discontinuation
- 2007-03-27 CN CN2007800213345A patent/CN101466805B/en not_active Expired - Fee Related
- 2007-04-03 US US11/732,437 patent/US8753739B2/en not_active Expired - Fee Related
- 2007-04-04 TW TW96111921A patent/TW200808540A/en unknown
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Also Published As
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CN101466805A (en) | 2009-06-24 |
CA2648463A1 (en) | 2007-10-18 |
BRPI0710646A2 (en) | 2011-08-23 |
US20070237967A1 (en) | 2007-10-11 |
DE102006016642A1 (en) | 2007-10-18 |
RU2008143913A (en) | 2010-05-20 |
TW200808540A (en) | 2008-02-16 |
US8753739B2 (en) | 2014-06-17 |
JP2009533242A (en) | 2009-09-17 |
JP5190447B2 (en) | 2013-04-24 |
MX2008012963A (en) | 2008-10-15 |
WO2007115678A1 (en) | 2007-10-18 |
KR20090038842A (en) | 2009-04-21 |
CN101466805B (en) | 2013-08-07 |
KR101440635B1 (en) | 2014-10-02 |
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