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
  • 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
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • 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
  • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
• • 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
• • 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
  • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• • 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
  • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
• • 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
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • 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
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or 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
  • B32B2250/00—Layers arrangement
  • B32B2250/24—All layers being polymeric
• • 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
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/558—Impact strength, toughness
• • 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
  • B32B2307/70—Other properties
  • B32B2307/71—Resistive to light or to UV
• • 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
  • B32B2419/00—Buildings or parts thereof
• • 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
  • B32B2605/00—Vehicles
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
  • Y10T428/2495—Thickness [relative or absolute]
  • Y10T428/24967—Absolute thicknesses 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
  • Y10T428/2495—Thickness [relative or absolute]
  • Y10T428/24967—Absolute thicknesses specified
  • Y10T428/24975—No layer or component greater than 5 mils thick

Definitions

• the present invention relates to cold impact multi-layer films comprising first and second layers wherein the second layer comprises polycarbonate, and wherein the first layer is an impact modified polyalkylacrylate having a layer thickness of less than 25 microns. Moreover, the invention relates to the production of these multilayer films, such as e.g. Mobile lenses containing said multi-layered moldings.
• WO 2008/074525 describes multilayer plastic bodies with a base layer of polycarbonate and a poly (meth) acrylate layer applied thereto, the total thickness of the multilayer plastic body being between 0.05 mm to 0.49 mm and between 1.21 mm to 5 mm and the total thickness the poly (meth) acrylate layer thickness is between 5% and 50% of the total thickness of the multilayer plastic body and the two layers are connected by coextrusion
• the films described herein have a layer thickness which is outside.
• JP 2006-103169 A describes a multilayer product with an acrylic resin layer of 50 to 120 ⁇ m and a polycarbonate layer of 0.5 mm to 1.2 mm (500 ⁇ m to 1200 ⁇ m) and thus lies outside the range claimed here.
• Object of this application is to provide a multi-layer film available which comprises a first layer which is an impact-modified polyacrylate, and includes a second layer comprising polycarbonate, said multilayer film is still impact at -30 0 C.
• Impact-resistant in the sense of the application is understood to mean that in a ball drop test the polyacrylate layer of the multilayer film is hit.
• these films in eg car as glazing this corresponds to the case that an object besipiellus flies during driving at very severe frost against the glass.
• the disc must not break brittle. It has been found that the polyacrylate layer must not exceed a certain layer thickness and that impact-modified polyacrylates are particularly suitable for this purpose.
• the present invention is therefore a multilayer product comprising a first layer (A) and a second layer (B), wherein the first layer (A) of polyalkyl (alkyl) acrylate and a layer thickness ⁇ 25 .mu.m, preferably ⁇ 20 ⁇ m, more preferably ⁇ 18 ⁇ m, and the second layer (B) contains a polycarbonate.
• the layers (A) and (B) may take the form of a film or a coextruded layer.
• Layer (A) generally has at least a thickness of> 0 ⁇ m, preferably> 1 ⁇ m and in particular> 2 ⁇ m.
• the thickness of the layer (A) is particularly preferably 10 ⁇ m to 21 ⁇ m, in particular 13 ⁇ m to 21 ⁇ m.
• the layers (A) and (B) according to the invention generally have a total layer thickness of 20 .mu.m to 500 .mu.m.
• Preferred total layer thicknesses are on the one hand 25 .mu.m to 100 .mu.m, particularly preferably 25 .mu.m to 40 .mu.m.
• Further preferred total layer thicknesses are 80 ⁇ m to 450 ⁇ m, more preferably 100 ⁇ m to 400 ⁇ m, very particularly preferably 120 ⁇ m to 380 ⁇ m and in particular 180 ⁇ m to 320 ⁇ m.
• Very particularly preferred overall layer thicknesses for automotive applications, in particular automotive glazing are overall layer thicknesses of 360 to 410 ⁇ m.
• the multi-layered product according to the invention may comprise further layers, in particular a UV protective layer (C) which contains polyalkyl (alkyl) acrylate and a UV stabilizer and may take the form of a film, a coextruded layer or a cured lacquer layer.
• a UV protective layer which contains polyalkyl (alkyl) acrylate and a UV stabilizer and may take the form of a film, a coextruded layer or a cured lacquer layer.
• the layers (A) and (C) according to the invention contain, as the polymer matrix, a polyalkyl (alkyl) acrylate.
• Polyalkyl (alkyl) acrylates for the purposes of the present invention are homopolymers, copolymers or terpolymers and preferably contain C 1 - to C 10 -alkyl esters of acrylic acid or of methacrylic acid as monomer component or mixtures thereof.
• C 1 to C 4 are alkyl esters of methacrylic acid.
• Particularly preferred is methyl methacrylate, which is preferably used in amounts of 50 to 100 wt .-% of the monomer mixtures ...
• the comonomer is preferably selected from the group consisting of acrylate and Methayrcylat, different from the first monomer, ethylenically unsaturated monomers such as styrene , alpha-methylstyrene and acrylonitrile. Branching agents may also be added to the monomer mixture. Particularly preferred are polymethyl (meth) acrylates having a methyl methacrylate monomer content of at least 80 wt .-%, preferably at least 90 wt .-% and optionally 0 wt .-% to 20 wt .-%, preferably 0 wt .-% to 10 wt .-% and other vinylic copolymerizable monomers such.
• Acrylic acid, methacrylic acid, maleic anhydride, hydroxy-C 1 to C 8 -alkyl esters of acrylic acid or of methacrylic acid are suitable as further comonomers.
• Impact-modified acrylate molding compositions are known in principle from the applications WO 2007/050230, WO 2007/008304 (EP 1910464).
• Impact-modified polyalkyl (alkyl) acrylates are particularly preferred. Such impact modifiers are preferably used so that the refractive index (RI) of the matrix and of the impact modifier match or are identical or almost identical.
• the impact modifier may be used in a concentration of from 5 to 60% by weight, preferably from 8 to 40% by weight, and more preferably from 10 to 20% by weight, based on the total weight of the layer.
• the impact modifier has a core-shell particle structure of at least three shells and has a hard core (glass transition temperature Tg> 0 ° C, preferably Tg> 25 ° C, preferably Tg> 40 ° C).
• the hard core may be a solid polymer with a Tg> 0 ° C.
• the hard core may also be a combination of a small amount of low Tg rubber core seed on which the hard core is formed.
• a small 5 wt% rubber core seed scattered into a hard core would be included in the invention as a hard core as long as the combination behaves as a hard core.
• the core is a crosslinked polymethyl methacrylate-ethyl acrylate copolymer
• the middle layer is a crosslinked polybutyl acrylate styrene copolymer
• the outer shell is a polymethyl methacrylate-ethyl acrylate copolymer.
• the impact modifier generally has an average particle size of less than 225 nanometers, and preferably from 50 to 200 nanometers as determined by Atomic Force Microscopy (AFM).
• AFM Atomic Force Microscopy
• the core is a crosslinked polymethyl methacrylate-ethyl acrylate copolymer
• the middle layer is a crosslinked polybutyl acrylate-styrene copolymer
• the outer layer is a polymethyl methacrylate-ethyl acrylate copolymer.
• Impact-modified polymethyl methacrylates are. available under the Altuglas® brand from Arkema.
• the impact modified layer may contain other additives such as stabilizers, plasticizers, fillers, colorants, pigments, antioxidants, antistatic agents, surfactants, toners.
• Suitable polycarbonates for the second layer (B) of the multilayer products according to the invention are all known polycarbonates, these may be homopolycarbonates, copolycarbonates and thermoplastic polyester carbonates.
• They preferably have average molecular weights M w from 18,000 to 40,000, preferably calibrated 22000-36000 and in particular from 24,000 to 33,000, determined by measuring the relative solution viscosity at 25 0 C in dichloromethane or in mixtures of weight amounts Phe- nol / o-dichlorobenzene light scattering.
• Preferred starting compounds are bisphenols of the general formula HO-Z-OH, wherein Z is a divalent organic radical having from 6 to 30 carbon atoms and containing one or more aromatic groups.
• Dihydroxyaryl compounds suitable for the preparation of polycarbonates are those of the formula (1)
• Z is an aromatic radical having 6 to 30 carbon atoms, which may contain one or more aromatic nuclei, may be substituted and may contain aliphatic or cycloaliphatic radicals or alkylaryls or heteroatoms as bridge members.
• Z in formula (1) preferably represents a radical of the formula (Ia)
• R 6 and R 7 independently of one another are H, Q-Cig-alkyl, Q-Cig-alkoxy, halogen, such as Cl or Br, or in each case optionally substituted aryl or aralkyl, preferably H or Ci-C ⁇ -alkyl, particularly preferably are H or Q-Cg-alkyl and very particularly preferably H or methyl, and
• X is a single bond, -SO 2 -, -CO-, -O-, -S-, C 1 - to C 6 -alkylene, C 2 - to C 5 -alkylidene or C 5 - to C 6 -cycloalkylidene, which with Q to C ö alkyl, preferably methyl or ethyl may be substituted, further for C 6 - to C 2 -arylene, which may optionally be condensed with further heteroatom-containing aromatic rings is.
• X is preferably a single bond, C 1 to C 5 -alkylene, C 2 to C 5 -alkylidene, C 5 to C 6 -cycloalkylidene, -O-, -SO-, -CO-, -S-, - SO 2 -,
• R 8 and R 9 for each X 1 individually selectable, independently of one another are hydrogen or C 1 to C 6 alkyl, preferably hydrogen, methyl or ethyl, and
• n is an integer from 4 to 7, preferably 4 or 5, with the proviso that at minimum one atom X 1, R 8 and R 9 are simultaneously alkyl least.
• 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, N-phenyl- Isatin bisphenol, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (BP-TMC), bisphenols of the 2-hydrocarbyl-3,3-bis (4-hydroxyaryl) phthalimidines type, in particular 2- Phenyl-3,3-bis (4-hydroxyphenyl) phthalimidine, and optionally mixtures thereof.
• bisphenol M 4,4- (meta-phenylenediisopropyl) diphenol
• BP-TMC 4,4- (para-phenylenediisopropyl) diphenol
• N-phenyl- Isatin bisphenol 1,1-bis (4-hydroxyphenyl
• bisphenols belonging to the aforementioned linking groups are bisphenol-A, tetraalkylbisphenol-A, 4,4- (meta-phenylenediisopropyl) diphenol (bisphenol M), 4,4- (para-phenylenediisopropyl) diphenol, 1, l -Bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (BP-TMC) and optionally mixtures thereof.
• 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.
• 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.
• Inert organic solvents used in the interfacial process include, for example, dichloromethane, the various dichloroethanes and chloropropane compounds, tetrachloromethane, trichloromethane, chlorobenzene and chlorotoluene, preferably chlorobenzene or dichloromethane or mixtures of dichloromethane and chlorobenzene.
• 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-
• 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 which are preferred according to the invention for the second layer of the multilayered product according to the invention are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the copolycarbonyl based on the two monomers bisphenol A and l, l-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 (B) of the inventive multi-layered product may contain 0.01 to 0.5% by weight of the esters or partial esters of monohydric to hexahydric alcohols, especially glycerin, 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, glycerin.
• 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 C) 0 to C 36 monocarboxylic acids and optionally hydroxy-monocarboxylic acids, preferably with saturated, aliphatic C H 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 montan 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.
• saturated, aliphatic C 1 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.
• esters of pentaerythritol and glycerol with stearic acid and palmitic acid are particularly preferred.
• esters of Guerbet alcohols and of glycerol with stearic acid and palmitic acid and optionally hydroxystearic acid are particularly preferred.
• the multilayered products according to the invention may contain organic dyes, inorganic color pigments, fluorescent dyes and particularly preferably optical brighteners.
• those multilayer products are preferred which are selected from the group consisting of plates, films and three-dimensional molded parts.
• the present invention is the use of the multilayer products according to the invention, in particular for outdoor applications with permanently high demands with regard to the visual impression, such as the glazing.
• the present invention further relates to the use of the multilayer products according to the invention for the production of articles, in particular transparent panes in the architectural and automotive sector, wherein the polyalkyllic (alkyl) acrylate layer (A) of the multilayered product has a critical case velocity for the toughened / brittle Transition (as a measure of the impact strength) of 20 m / s to 2.6 m / s, preferably 15 m / s to 2.6 m / s, measured in the plate penetration test with 13 kg drop weight with an instrumented case of the Fa. RoellAmsler (IFW 420) at -30 0 C, mandrel diameter 20 mm.
• the invention is further illustrated by the following examples without being limited thereto. The examples according to the invention represent only preferred embodiments of the present invention.
• Example 1 (according to the invention):
• the machines and apparatus used for the production of. coextruded films include:
• the granules of the base material were fed to the hopper of the main extruder.
• the melting and conveying of the respective material took place. Both material melts were combined in the coextrusion die. From the nozzle, the melt reaches the smoothing calender whose rolls have the temperature given in Table A. On the smoothing calender, the final shaping and cooling of the material takes place.
• a rubber roller was used. set. Subsequently, the film is transported through a trigger, it is applied on both sides of the protective film, then the winding of the film takes place.
• the thickness of the transparent coating thus obtained was determined by means of an Eta SD 30 from Eta Optik GmbH.
• Plexiglas 8N PMMA molding composition having an MVR according to ISO 1133 of 3 cm 3/10 min.
• the thickness of the transparent coating thus obtained was determined by means of an Eta SD 30 from Eta Optik GmbH.
• Plexiglas 8N PMMA molding compound with an MVR according to ISO 1133 of 3 cmVIO min
• Plexiglas 8N PMMA molding compound with an MVR according to ISO 1133 of 3 cmVIO min
• the thickness of the transparent coating thus obtained was determined by means of an Eta SD 30 from Eta Optik GmbH.
• the films of Examples 1 to 6 were used.
• the experiments were carried out on an injection molding machine from Arburg.
• the Arburg Allrounder 570 C has a clamping force of max. 200 to and is year 2003.
• the films were placed in the injection mold and back-injected from the polycarbonate side with Makrolon AL 2647 at 300 0 C.
• the filling time was 2 seconds and the injection pressure was measured at 1000 bar.
• the tool temperature has been set to 60 ° C by default. 3 mm thick back-injected plates were obtained.
• Critical Impact Velocity (hereafter referred to as Critical Velocity) is the velocity of the impact mass at which the damage pattern changes from a tough fracture (crack in the specimen) to a brittle fracture (splintering or punching the impact point).
• TT toughness means low temperature toughness
• the plates with 15 ⁇ m and 20 ⁇ m PMMA layer thickness show a tough fracture behavior in PMMA in the tensile zone in this experiment.
• the critical rate at which the transition from tough to brittle fracture occurs is 9.8 and 7.4 m / s for these samples.
• Thick PC film [ ⁇ m] 235 230 225
• the coex film according to the invention with the impact-modified PMMA proves to be better resistant to UV light than the homo-PMMA.

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