EP1379381A1 - Systeme stratifie absorbant la chaleur - Google Patents

Systeme stratifie absorbant la chaleur

Info

Publication number
EP1379381A1
EP1379381A1 EP02722277A EP02722277A EP1379381A1 EP 1379381 A1 EP1379381 A1 EP 1379381A1 EP 02722277 A EP02722277 A EP 02722277A EP 02722277 A EP02722277 A EP 02722277A EP 1379381 A1 EP1379381 A1 EP 1379381A1
Authority
EP
European Patent Office
Prior art keywords
layer
layer system
absorber
layers
transparent
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Withdrawn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
EP02722277A
Other languages
German (de)
English (en)
Inventor
Martin Döbler
Peter Bier
Rüdiger Gorny
Monika Stihler
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.)
Covestro Deutschland AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP1379381A1 publication Critical patent/EP1379381A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • 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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2369/00—Polycarbonates
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • 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
    • 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]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Definitions

  • the invention relates to a heat-absorbing layer system which contains at least a first layer (A) and a second layer (B), as well as to its production, use and products made therefrom.
  • compositions containing transparent thermoplastic polymers such as polycarbonate, offer many northern parts for the automotive sector and for buildings compared to conventional glass discs such as. B. increased
  • thermoplastic polymers and compositions containing transparent thermoplastic polymers allow for a much greater freedom of design due to their easier formability.
  • NIR near infrared
  • Inorganic ⁇ IR absorbers usually show high light stability, but have the disadvantage that they are not soluble in thermoplastics and therefore form cloudy to opaque molding compounds.
  • organic NIR absorbers soluble in thermoplastics are known, but they show less light stability.
  • JP 10-077360 A describes thin, film-like heat-absorbing layer systems which simultaneously contain (A) a phthalocyanine infrared absorber and (B) an ultraviolet absorber. This is intended to improve the weather resistance of the heat protection layer.
  • a film-like coating layer with a thickness of 0.13 mm is proposed, which contains both phthalocyanine infrared absorber and ultraviolet absorber.
  • Such a coating layer has an acceptable weather resistance in 48-hour rapid weathering tests. For practical applications, however, weathering tests of more than 500 hours are required.
  • the thin film-like coating described in this publication layer inadequate optical properties and are therefore unsuitable for use in automotive glazing.
  • JP 10-077360 A also proposes a thin, film-like, heat-absorbing coating of 3 layers with a gradual decrease in phthalocyanine infrared absorber.
  • This contains an ultraviolet absorber in the upper layer facing the light radiation, a mixture of ultraviolet and phthalocyanine infrared absorbers in the middle layer and further phthalocyanine infrared absorbers in the lower layer facing away from the light radiation.
  • a disadvantage of such a layer system is the costly three-layer structure and the poor optical properties of the layer system produced by lamination.
  • thermoplastics can be protected by using UV-absorbing lacquers and / or coextruded layers with a high content of UV absorber.
  • UV absorber it is known from EP 0 110 221 A to improve the weather resistance of polycarbonate plastic sheets by coating them with a layer containing 3 to 15% by weight of a UV absorber.
  • the multilayer systems described in this publication do not contain an infrared absorber.
  • EP 0 774 551 A describes heat filters based on inorganic pigments which have a UV-absorbing protective layer.
  • the disadvantage of inorganic pigments is that they do not dissolve in thermoplastics, so that there are no transparent moldings with low turbidity in the visible area.
  • the object of the invention is to provide heat-absorbing coating systems which are as simple and inexpensive as possible to produce excellent long-term weather resistance as well as excellent optical properties such as transparency and gloss and can be used for the thermal insulation of transparent plastic glazing elements.
  • this task is achieved by a transparent heat absorbing
  • the heat-absorbing layer systems according to the invention are distinguished by the fact that organic infrared absorber and ultraviolet absorber are introduced together into one layer (layer A, “NIR / UV layer”). Because the two additives are present together in the same layer, a large part of the sensitive organic infrared absorber is protected against UV radiation. In addition, the organic infrared absorber is protected from decomposition by UV radiation by means of a further layer containing ultraviolet absorber (layer B, “UV layer”). It is also special that layer (A) is the only layer in the layer system according to the invention which contains organic IR absorbers. If appropriate, further layers contained in the layer system, such as clear layers, do not contain any organic infrared absorber. Since the UV layer (layer B) u. a. to protect NIR dye in layer (A) from UV rays, it is advantageous to arrange layer (B) in the direction of the incident light above layer (A). Starting with the side facing the light, the following is therefore
  • Layer structure advantageous: layer (B) - layer (A), in particular with the proviso that layer (A) serves simultaneously as a substrate (e.g. plastic car window). It is also possible to arrange one or more further layers (B) below layer (A), which leads, for example, to the following layer structure: layer (B) - layer (A) - layer (B). In this embodiment too, it is advantageous if Layer (A) also serves as a substrate (e.g. plastic car window).
  • An example of this is a sheet of thermoplastic coextruded on both sides, containing organic infrared absorber and UV absorber [layer (A)] with two thin UV absorber layers on both sides [layer (B)].
  • the layer system according to the invention is distinguished from the single-layer thermal protection coating described in JP 10-077360 A by a significantly improved long-term weather behavior. Compared to the 3-layer thermal protection coating described in JP 10-077360 A, the layer system according to the invention is distinguished by considerably better transparency and gloss values and by a simpler and less expensive production. Contrary to the teaching of JP 10-077360, it was surprisingly found according to the invention that introducing NIR absorber into several layers for the purpose of achieving a gradual decrease in NIR absorber in the layer system is not necessary for an improvement in the Long-term weather resistance. By saving an additional NIR layer with the layer system according to the invention, the transparency and gloss behavior of the heat-absorbing layer system is also significantly improved.
  • the first layer (A) accordingly has a thickness of 2 to 8 mm, in particular 3 to 5 mm.
  • the second layer (B) has a thickness of 1 to 100 microns.
  • the second layer is designed as a polymer film with a thickness of 30 to 80 ⁇ m, in particular 40 to 60 ⁇ m. It is also possible to design the second layer as a lacquer with a thickness of 1 to 30 ⁇ m, in particular 4 to 10 ⁇ m.
  • the NIR / UV layer (layer A) is not, as described in JP 10-077360 A, but as a thin, film-like coating layer in a thickness of 0.8 to 15 mm. This was surprising because thin layers generally have a better opacity than thick ones.
  • a layer system in which a relatively thick NIR / UV layer (layer A) from 0.8 to 15 mm is coated with a relatively thin UV protective layer (layer B) from 1 to 100 ⁇ m has proven to be particularly advantageous.
  • the coating can take place, for example, as a lacquer or as a thin polymer film.
  • Such a layer system exhibits excellent transparency and clouding behavior with excellent long-term weather resistance. It has proven to be particularly advantageous if NIR / UV layer, both in terms of production technology and property-specific for use in automotive glazing
  • Layer A and UV layer (Layer B) and optionally further layers of the layer system are formed as coextruded polymer layers in the corresponding thicknesses.
  • the layer system according to the invention contains, in addition to layers (A) and (B), at least one further transparent layer (C) which contains neither an organic infrared absorber nor an ultraviolet absorber.
  • Layer (C) is also referred to as "clear layer” and serves to improve the scratch resistance or to increase the mechanical rigidity.
  • the clear layers can be arranged anywhere in the layer system, ie above, below and / or between layers (A) and (B). However, a layer system with the following layer structure (starting with the one facing the light irradiation) is particularly advantageous
  • layers made of transparent thermoplastics come into consideration as polymer layers.
  • Particularly suitable transparent thermoplastics are polycarbonates or copolycarbonates or PMMA or PETG.
  • layers (A) and / or (B) are, for example, layers based on polycarbonate
  • layer (C) is also a layer based on polycarbonate or PMMA or PETG.
  • Literature-known infrared absorbers such as those used for. B. in M. Matsuoka, Infrared Absorbing Dyes, Plenum Press, New York, 1990 are described in terms of substance classes. Infrared absorbers from the classes of phthalocyanines, naphthalocyanines, metal complexes, azo dyes, anthraquinones, squaric acid derivatives, immonium dyes, perylenes, quaterylenes and polymethines are particularly suitable.
  • phthalocyanines and naphthalocyanines are particularly suitable. Due to the improved solubility in thermoplastics, phthalocyanines and naphthalocyanines with bulky side groups are preferred. There are no particular restrictions with regard to the amount of organic infrared absorber contained in layer (A), as long as the desired absorption of heat radiation and sufficient transparency of the layer system is ensured. It has proven to be particularly advantageous if layer (A) contains organic infrared absorbers in an amount of 0.001 to 10 g / m 2 , in particular 0.1 to 1 g / m 2 .
  • the infrared absorbers are preferably used in concentrations between 1 and 10,000 ppm, preferably between 10 and 1,000 ppm and very particularly preferably between 20 and 400 ppm. Mixtures of infrared absorbers are also particularly suitable. The person skilled in the art can achieve an optimization of the absorption in the near infrared range with dyes of different wavelengths of the absorption maxima.
  • Ultraviolet absorbers suitable for use in the layer system according to the invention are compounds which have the lowest possible transmission below 400 nm and the highest possible transmission above 400 nm. Such compounds and their preparation are known from the literature and are described, for example, in EP 0 839 623 A, WO 96/15102 and EP 0 500496 A. Ultraviolet absorbers which are particularly suitable for use in the layer system according to the invention are benzotriazoles, triazines, benzophenones and / or arylated cyanoacrylates.
  • Particularly useful ultraviolet absorbers are hydroxy-benzotriazoles, such as 2- (3 ', 5'-bis (l, l-dimethylbenzyl) -2'-hydroxyphenyl) benzotriazole (Tinuvin ® 234, Ciba Specialty Chemicals, Basel) 2- (2'-Hydroxy-5 '- (tert-octyl) phenyl) benzotriazole (Tinuvin ® 329, Ciba Specialty Chemicals, Basel), 2- (2 , -hydroxy-3' - (2-butyl ) -5 '- (tert-butyl) phenyl) benzotriazole (Tinuvin ® 350, Ciba Specialty Chemicals, Basel), bis- (3- (2H-benzotriazolyl) -2-hydroxy-5-tert-octyl ) methane, (Tinuvin ® 360, Ciba Specialty Chemicals, Basel), 2- (hydroxy-2-hydroxyphen
  • nanoscale inorganic UV absorbers with or without organic UV absorbers can also be used.
  • TiO 2 , ZnO, CeO 2 are preferred.
  • the size of these particles is smaller than 100 nm. The production is known.
  • layer (A) contains ultraviolet absorbers in an amount of 0.1 to 10%, in particular 0.2 to 1%. It has also proven to be advantageous if layer (B) contains ultraviolet absorbers in an amount of 0.1 to 40%, in particular 1 to 10%.
  • the base material for layers (A) and (B) there are no special restrictions with regard to the base material for layers (A) and (B) as long as the material has a high level of transparency and weather resistance and is therefore suitable for use in automotive glazing.
  • the individual layers of the layer system are layers based on polymers or lacquers. This means that the organic infrared absorbers and / or ultraviolet absorbers, insofar as they are contained in the individual layers, are incorporated in a polymer or lacquer layer.
  • Transparent thermoplastic polymers are preferably used.
  • Transparent thermoplastic polymers in the sense of the invention are e.g. B. polymers of ethylenically unsaturated monomers and / or polycondensates of bifunctional reactive compounds.
  • transparent thermoplastic Polymers are e.g. B. polycarbonates or copolycarbonates based on diphenols, poly- or copolyacrylates and poly- or copolymethacrylate such as.
  • B. poly- or copolymethyl methacrylates and copolymers with styrene such as.
  • PSAN transparent polystyrene-acrylonitrile
  • Polymers based on cyclic olefins eg TOPAS ® , a commercial product from Ticona
  • poly- or copolycondensates of terephthalic acid such as, for. B.
  • PET or CoPET Poly- or copolyethylene terephthalates (PET or CoPET) or PETG can be mixed.
  • Polycarbonates or copolycarbonates are preferred.
  • Particularly preferred polycarbonates are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on 1,3-bis (4-hydroxypheny ⁇ ) -3,3,5-trimethylcyclohexane and the copolycarbonates based on the two monomers bisphenol A and 1.1 bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane.
  • Polycarbonates in the sense of the present invention are both homopolycarbonates and copolycarbonates; the polycarbonates can be linear or branched in a known manner.
  • the polycarbonates are prepared in a known manner from diphenols, carbonic acid derivatives, optionally chain terminators and branching agents.
  • Diphenols suitable for the preparation of the polycarbonates are, for example, hydroquinone, resorcinol, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ethers,
  • Bis (hydroxyphenyl) ketones bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, ⁇ - ⁇ '-bis (hydroxyphenyl) diisopropylbenzenes, and their core alkylated and nuclear halogenated compounds.
  • Preferred diphenols are 4,4'-dihydroxydiphenyl, 2,3-bis (4-hydroxyphenyi) propane, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1,1-bis (4th -hydroxyphenyl) -p-diisopropylbenzene, 2,2-bis (3-methyl-4-hydroxyphenyl) propane, 2,2-bis (3-chloro-4-hydroxyphenyl) propane, bis- (3,5-dimethyl-4-hydroxyphenyl) methane, 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) propane, bis (3,5-dimethyl-4-hydroxyphenyl) sulfone, 2,4-bis (3,5-dimethyl-4-hydroxyphenyl) -2-methylbutane, 1,1-bis (3,5-dimethyl-4-hydroxyphenyl) -p-diisopropylbenzene, 2,2- Bis (3,5-dichloro-4-hydroxyphenyl) propane, 2,2-bis (3,
  • diphenols are 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis
  • Suitable carbonic acid derivatives are, for example, phosgene or diphenyl carbonate.
  • Suitable chain terminators that can be used in the production of the polycarbonates are both monophenols and monocarboxylic acids.
  • Monophenols are phenol itself, alkylphenols such as cresols, p-tert-butylphenol, p-n-octylphenol, p-iso-octylphenol, pn-nonylphenol and p-iso-nonylphenol, halophenols such as p-chlorophenol, 2,4-dichlorophenol, p-bromophenol and 2,4,6-tribromophenol, 2,4,6-triiodophenol, p-iodophenol, and mixtures thereof.
  • alkylphenols such as cresols, p-tert-butylphenol, p-n-octylphenol, p-iso-octylphenol, pn-nonylphenol and p-iso-nonylphenol
  • halophenols such as p-chlorophenol, 2,4-dichlorophenol, p-bromophenol and 2,4,6-trib
  • Particularly preferred chain terminators are p-tert-butylphenol and phenol.
  • Suitable monocarboxylic acids are also benzoic acid, alkylbenzoic acids and halobenzoic acids.
  • Preferred chain terminators are also the phenols of the formula (I)
  • R is hydrogen or a C ⁇ to C 30 -alkyl radical, is linear or branched, is preferably tert-butyl or is a branched or unbranched C 8 and / or C -alkyl radical.
  • the amount of chain terminator to be used is preferably 0.1 to 5 mol%, based on moles of diphenols used in each case.
  • the chain terminators can be added before, during or after phosgenation.
  • Suitable branching agents are the tri- or more than trifunctional compounds known in polycarbonate chemistry, in particular those with three or more than three phenolic OH groups.
  • Suitable branching agents are, for example, phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hepten-2, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) -heptane , 1,3,5-
  • the amount of branching agents which may be used is preferably 0.05 to 2 mol%, based in turn on moles of diphenols used in each case.
  • the branching agents can either be introduced with the diphenols and the chain terminators in the aqueous alkaline phase, or in an organic solvent. Solvent added before the phosgenation. In the case of the conversion process, the branching devices are used together with the diphenols.
  • compositions according to the invention may also contain conventional polymer additives, such as. B. those in EP-A 0 839 623, WO 96/15102 and EP-A 0 500
  • antioxidants and mold release agents but also flame retardants, glass fibers, fillers, foaming agents, pigments, optical brighteners or dyes known in the literature, in the amounts customary for the respective thermoplastics.
  • thermoplastic polycarbonates as an impurity are preferably less than 10 ppm, particularly preferably less than 5 ppm.
  • thermoplastic polycarbonates are familiar to the person skilled in the art.
  • thermoplastic materials can be different or the same.
  • Suitable moldings / protective layer combinations are listed, for example, in EP 0 320 632 A. Similar plastics are preferably suitable.
  • Lacquer systems suitable for use in the layer system according to the invention are those whose crosslinking components have acrylate, allyl, epoxy, siloxane, isocyanate, anhydride and / or melamine formaldehyde functions.
  • Comprehensive descriptions of such paint systems can be found in: “Textbook of paints and layers ", publisher: Dr. Hans Kittel, publishing house Hirzel, Stuttgart, 1998; in” Lackeckharze “by Hans Wagner, Hans Friedrich Sarx, Carl Hanser publishing house Kunststoff, 1971; especially for epoxy resins in "Epoxy Resins, Chemistry and Technology” edited by Clayton A. May and Yoshio Tanaka with Marcel Dekker, Inc. New York, 1973, Chapter 7, page 451 ff.
  • Siloxane paints such as, for. B. described in DE 4 020 316 A.
  • the thickness of the lacquer layers is 1 to 200 ⁇ m, preferably 2 to 50 ⁇ m and very particularly preferably 2 to 10 ⁇ m.
  • the viscosity of the lacquer is preferably 5 to
  • the polymers or lacquers used in layers (A), (B) and / or (C) may contain further additives, such as. B. the antioxidants, flame retardants, fillers described in EP 0 839 623 AI and EP 0 500 496 AI,
  • Foaming agents conventional dyes and pigments, optical brighteners and nucleating agents or the like, preferably in amounts of up to 5% by weight, preferably 0.01 to 5% by weight, based on the mixture as a whole, particularly preferably 0.01 to 1 wt .-%, based on the amount of plastic. Mixtures of these additives are also suitable.
  • thermoplastics can also contain conventional thermal stabilizers.
  • thermal stabilizers according to the invention are particularly suitable: hindered phenols such as octadecyl 3- (3 ', 5 t -di-tert-butyl-4'-hydroxyphenyl) propionate (Irganox ® 1076, Ciba Specialty Chemicals, Basel, Switzerland).
  • thermal stabilizers according to the invention particularly suitable phosphites, especially tris (2,4-di-tert-butyl-phenyl) phosphite (Irgafos ® 168, Ciba Specialty Chemicals, Basel, Switzerland) or phosphines such.
  • thermoplastics of the layer system according to the invention can also contain conventional mold release agents.
  • Particularly suitable mold release agents are pentaerythritol tetrastearate (PETS) or glycerol monostearate (GMS).
  • organic infrared absorbers, ultraviolet absorbers and other additives can be introduced into the individual layers of the layer system according to the invention by known methods such as compounding, mixing in solution, coextrusion, kneading, mixing in by injection molding or as a master batch.
  • the layer system according to the invention can by known methods such as painting,
  • Coextrusion, dipping, pressing, laminating, laminating, multi-component injection molding, application from solution, back injection or the like can be produced in one or more optionally different steps.
  • the application of the individual layers to each other can be done simultaneously or immediately after the shape of the grand body, z. B. by coextrusion or multi-component injection molding.
  • the application can also be done on the molded base, z. b. by lamination with a film or by coating with a solution.
  • the layer structure according to the invention can optionally also subsequently be thermoplastic deformed, for example by deep drawing.
  • the layer system according to the invention can be produced, for example, by the following process steps:
  • composition for layer (A) by mixing organic infrared absorber and ultraviolet absorber with a transparent polymeric base material or coating system
  • composition for layer (B) by mixing ultraviolet absorber with a transparent polymeric base material or coating system
  • the mixing of the ultraviolet and / or infrared absorber with the polymeric base material is preferably carried out by compounding.
  • layer (A) is produced by injection molding, layer (B) by painting and optionally further layers by injection molding or painting.
  • the individual layers are preferably produced by coextrusion.
  • multi-wall sheets double-wall sheets, three-wall sheets, etc.
  • corrugated sheets can also be produced from the layer systems according to the invention. It is also used for injection molded parts such as food containers, components of electrical appliances and in glasses, e.g. B. also possible for goggles such as welding goggles.
  • the layer systems according to the invention can be used universally where heat permeability is undesirable.
  • the application in automotive components such as. B. glazing elements, car roof windows, plastic lenses and architectural applications such as building glazing, greenhouse components, skylights, bus stops or similar applications.
  • the layer system according to the invention is suitable for the production of moldings, in particular for the production of transparent plastic glazing elements such as, for example, plastic glazing elements based on polycarbonate and / or copolycarbonate.
  • the invention therefore also relates to moldings produced using the layer system according to the invention.
  • the polycarbonates (Makrolon 2808 or Makrolon ® DP 1265 from Bayer AG, Leverkusen) with an average molecular weight of approx. 28,000 or 20,000 (M w according to GPC) were used at 300 ° C on a twin-screw extruder with the The amount of additive stated in Table 1 was compounded and then granulated. Color sample plates are then sprayed from this granulate (60 mm x 40 mm x 2 mm). Compositions V5 and 6 were sprayed directly at 250 ° C.
  • IR absorber (A) vanadyl-5,14,23,32-tetraphenyl-2,3-naphthalocyanine (Aldrich, Steinheim, Germany),
  • the color sample plates are then coated with a 100 ⁇ m thick polycarbonate film consisting of 5% UV absorber (B) in Makrolon ® 3108 by pressing on at 155 ° C. and 100 kN for 60 s.
  • the transmission spectra of the color sample platelets from the compositions 2, 4 and 6 and the comparative compositions 1, 3 and 5 were measured with a "lamda 9" UV-VIS-NIR spectrometer from Perkin Elmer. The samples are then measured with Xe-WOM below 0 , 35 W / m 2 (102: 18) weathered and again the
  • the transmission was measured at the absorption maximum in the NIR.
  • the transmissions were measured at a secondary maximum in order to obtain a better comparison of the stabilizing effect of the layer system according to the invention.
  • compositions 2, 4 and 6 As can be seen from Table 2, the transmission at the absorption maxima or secondary maxima of the compositions 2, 4 and 6 according to the invention increases less than in the comparison compositions 1, 3 and 5. This means that the NIR dyes with the aid of The layer system according to the invention (compositions 2, 4 and 6) fades less during weathering than by protection only with a conventional UV protective layer (non-uniform compositions 1, 3 and 5).
  • compositions 2, 4 and 6 fades less during weathering than by protection only with a conventional UV protective layer (non-uniform compositions 1, 3 and 5).
  • the turbidity of weathered and unweathered samples was determined in accordance with ASTM D 1003 using the Haze-Gard device from BYK-Gardner
  • the gloss of weathered and unweathered samples was determined in accordance with DIN standard 67530.
  • the measured values in Table 4 show that the layer system according to the invention (composition 2 with protective film), with 119% and 138%, exhibits a higher gloss after 5,000 h of Xe-WOM than comparison samples, which were in some cases weathered for less time.
  • test results show that the layer systems according to the invention with simple construction have excellent long-term weather stability with Xe-WOM weathering, even after 5,000 hours, excellent transparency behavior and excellent gloss values.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un système stratifié transparent absorbant la chaleur, qui comprend une première couche (A) et une seconde couche (B). La première couche (A) comporte au moins un absorbeur d'infrarouges organique et au moins un absorbeur d'ultraviolets. La seconde couche (B) comporte au moins un absorbeur d'ultraviolets. La première couche (A) est la seule couche du système stratifié qui contient un absorbeur d'infrarouges organique. L'invention concerne également la production, l'utilisation d'un tel système stratifié, ainsi que des produits réalisés à partir de celui-ci.
EP02722277A 2001-04-10 2002-03-28 Systeme stratifie absorbant la chaleur Withdrawn EP1379381A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117785A DE10117785A1 (de) 2001-04-10 2001-04-10 Wärmeabsorbierendes Schichtsystem
DE10117785 2001-04-10
PCT/EP2002/003479 WO2002083412A1 (fr) 2001-04-10 2002-03-28 Systeme stratifie absorbant la chaleur

Publications (1)

Publication Number Publication Date
EP1379381A1 true EP1379381A1 (fr) 2004-01-14

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Application Number Title Priority Date Filing Date
EP02722277A Withdrawn EP1379381A1 (fr) 2001-04-10 2002-03-28 Systeme stratifie absorbant la chaleur

Country Status (12)

Country Link
US (1) US6893689B2 (fr)
EP (1) EP1379381A1 (fr)
JP (1) JP2004529007A (fr)
KR (1) KR20030090722A (fr)
CN (1) CN100374293C (fr)
BR (1) BR0208740A (fr)
CA (1) CA2443706A1 (fr)
DE (1) DE10117785A1 (fr)
IL (1) IL158253A0 (fr)
MX (1) MXPA03009192A (fr)
WO (1) WO2002083412A1 (fr)
ZA (1) ZA200307815B (fr)

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Also Published As

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CN100374293C (zh) 2008-03-12
MXPA03009192A (es) 2004-02-17
ZA200307815B (en) 2004-10-07
US20030039821A1 (en) 2003-02-27
WO2002083412A1 (fr) 2002-10-24
DE10117785A1 (de) 2002-10-17
US6893689B2 (en) 2005-05-17
BR0208740A (pt) 2004-07-20
CN1501861A (zh) 2004-06-02
JP2004529007A (ja) 2004-09-24
CA2443706A1 (fr) 2002-10-24
KR20030090722A (ko) 2003-11-28
IL158253A0 (en) 2004-05-12

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