EP1453673A1 - Produit multicouche - Google Patents

Produit multicouche

Info

Publication number
EP1453673A1
EP1453673A1 EP02781324A EP02781324A EP1453673A1 EP 1453673 A1 EP1453673 A1 EP 1453673A1 EP 02781324 A EP02781324 A EP 02781324A EP 02781324 A EP02781324 A EP 02781324A EP 1453673 A1 EP1453673 A1 EP 1453673A1
Authority
EP
European Patent Office
Prior art keywords
mol
derived
repeating units
diols
dicarboxylic acids
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Withdrawn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
EP02781324A
Other languages
German (de)
English (en)
Inventor
Rüdiger Gorny
Siegfried Anders
Wolfgang Nising
Jürgen Röhner
Marco Roelofs
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 MaterialScience 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 MaterialScience AG filed Critical Bayer MaterialScience AG
Publication of EP1453673A1 publication Critical patent/EP1453673A1/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Withdrawn legal-status Critical Current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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • 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

Definitions

  • the present invention relates to a multilayer product comprising a layer containing polycarbonate and a layer containing a copolyester.
  • the present invention relates to a method for producing this multilayer product and to other products which contain said multilayer product.
  • Polycarbonate cannot be used in some applications because its chemical resistance is insufficient.
  • Polyester and copolyester cannot be used in some applications because their impact strength is insufficient.
  • Chemically resistant products in particular chemically resistant plates, are therefore usually not made in the prior art from polycarbonate but from PET (polyethylene terephthalate) or other polyesters or PMMA (polymethyl methacrylate). If polycarbonate is used, then either a chemically more resistant lacquer is applied in the prior art, or a film made of a more resistant material is laminated on, or polycarbonate blends are used, which in many cases are either not transparent or have a noticeable cloudiness. Transparent polycarbonate blends known in the prior art have the disadvantage that they have notched impact strengths well below that of polycarbonate.
  • EP-A 0 110 221 discloses sheets made of two layers of polycarbonate, one layer containing at least 3% by weight of a UV absorber. These plates can be produced according to EP-A 0 110 221 by coextrusion.
  • EP-A 0 320 632 discloses molded articles made of two layers of thermoplastic
  • Plastic preferably polycarbonate, one layer containing special substituted benzotriazoles as UV absorbers.
  • EP-A 0 320 632 also discloses the production of these moldings by coextrusion.
  • EP-A 0 247 480 discloses multilayer plates in which a layer of branched polycarbonate is present in addition to a layer of thermoplastic plastic, the layer of polycarbonate containing special substituted benzotriazoles as UV absorbers. The production of these plates by coextrusion is also disclosed.
  • EP-A 0 500 496 discloses polymer compositions which are stabilized against UV light with special triazines and their use as an outer layer in multilayer systems.
  • Polycarbonate, polyesters, polyamides, polyacetals, polyphenylene oxide and polyphenylene sulfide are mentioned as polymers.
  • EP-A 0 825 226 discloses compositions of polycarbonate, substituted aryl phosphites and substituted triazines. EP-A 0 825 226 also discloses multi-layer panels in which one layer consists of the composition mentioned.
  • US-A 5 709 929 and US-A 5 654 083 disclose multilayer plastic sheets containing a layer made of a special copolyester and a second layer made of the same copolyester, the second layer containing a UV absorber.
  • JP-A 02 028 239 discloses a film made of polyvinylidene fluoride and a poly methacrylate.
  • a disadvantage of the film is that polyvinylidene fluoride is expensive.
  • JP-A 11 323 255 discloses a siloxane lacquer with perfluoroalkyl additives which can be applied to polycarbonate in order to make it more chemically resistant.
  • US-A 6 011 124 discloses a polymer blend (blend) of a polyester and a polycarbonate. This mixture has the advantage that it is more chemically resistant than polycarbonate. This mixture has the disadvantage that it has a lower notched impact strength than polycarbonate.
  • WO 98/19862 discloses multi-layer plates which contain UV absorbers and optical brighteners in one layer.
  • polyesters are e.g. PET or PBT. In contrast to the present invention, these polyesters are partially crystalline and not amorphous.
  • JP-A 3 176 145 describes films made of polycarbonate which are coextruded with polyesters made from ethylene glycol, terephthalic acid and isophthalic acid.
  • JP-A 5 212 841 describes polycarbonate films which are coextruded with polyesters.
  • a multilayer product comprising a layer containing polycarbonate and a layer containing a copolyester, wherein the repeating units of the copolyester are derived from dicarboxylic acids and from diols, and wherein the repeating units derived from dicarboxylic acids are 50 to 100 mol% of terephthalic acid and 0 to 50 mol% of isophthalic acid and 0 to 10 mol% are derived from other dicarboxylic acids, and wherein the sum of the amount of repeating units is derived from terephthalic acid and derived from isophthalic acid and derived from the other dicarboxylic acids
  • the repeating units derived from diols being 0 to 97 mol% of ethylene glycol and 0 to 97 mol% of cyclohexanedimethanol and 0 to 3 mol% of diethylene glycol and 0 to 10 mol% are derived from other diols, and the sum of the amount of repeating units derived from ethylene glycol and from cyclohexanedimethanol and from diethylene glycol and from the other diols
  • Amorphous copolyesters are preferred.
  • This multilayer product is the subject of the present invention.
  • the present invention furthermore relates to a process for producing this multilayer product by coextrusion.
  • the present invention furthermore relates to a product which contains the said multilayer product.
  • This product, which contains the multilayer product mentioned, is preferably selected from the group consisting of glazing, protective window, conservatory, veranda, carport, bus stop, billboard, showcase, window, partition, cash register, viewing window, display and roofing.
  • the glazing mentioned can, for. B. glazing for automobiles or for greenhouses or for petrol stations or for laboratories or for chemical companies.
  • the protective screens mentioned can, for. B. Protective screens in laboratories.
  • the protective screens mentioned can serve, for example, as housings for machines to protect against flying parts that can come loose. Such protective screens are e.g. used as a replacement for steel cages.
  • the above-mentioned lenses can e.g. Viewing windows in counters or showcases.
  • the above-mentioned lenses can, for. B. used in the food industry.
  • proportions of the repeat units in the copolyester according to the invention used for the present invention is as follows.
  • a proportion of n mol% means a proportion of n mol% based on the sum of the proportions of all repeating units present in the copolyester. If the proportion is 100 mol%, then there are no other repeat units.
  • a particular embodiment of the present invention is given when the proportion of the other dicarboxylic acids is 0 mol%.
  • a particular embodiment of the present invention is given when the proportion of the other diols is 0 mol%.
  • a particular embodiment of the present invention is given when the proportion of the layer containing polycarbonate has at least nine times as much mass as the proportion of the layer containing a copolyester.
  • the multilayer product according to the invention has numerous advantages.
  • it has the advantage of being chemically resistant. It also has the advantage of having high impact strength and notched impact strength. It is also easy and inexpensive to manufacture.
  • the raw materials are light, available and inexpensive.
  • the other positive properties of the polycarbonate, for example its good optical properties, are not or only insignificantly impaired in the multilayer product according to the invention.
  • the multilayer product according to the invention has further advantages over the prior art.
  • the multilayer product according to the invention can be produced by coextrusion. This results in advantages over a product produced by painting. This means that no solvents evaporate during coextrusion, as is the case with coatings.
  • paints require complex technology. For example, they require explosion-proof units, the recycling of solvents, and therefore expensive investments in plants. Coextrusion does not have this disadvantage.
  • the multilayer product according to the invention has numerous advantages because it can be produced by coextrusion.
  • a film When laminating, a film must first be produced in a separate step. Coextrusion does not have this disadvantage.
  • sheets with a width of 2.2 meters or more can be easily produced by coextrusion.
  • the films for lamination are usually only available in a maximum width of 1.6 meters.
  • a preferred embodiment of the present invention is said multilayer product, the repeating units derived from dicarboxylic acids being 90 to 100 mol% of terephthalic acid and 0 to 10 mol% of isophthalic acid and 0 to 10 mol% of other dicarboxylic acids, and wherein the sum of the amount of repeating units derived from terephthalic acid and derived from isophthalic acid and derived from the other dicarboxylic acids
  • repeating units derived from diols are 60 to 80 mol% of ethylene glycol and 20 to 40 mol% of cyclohexanedimethanol and 0 to 3 mol% of diethylene glycol and 0 to 10 mol% are derived from other diols, and wherein the sum of the amount of the repeating units derived from ethylene glycol and from cyclohexanedimethanol and from diethylene glycol and from other diols is 100 mol%.
  • Another preferred embodiment of the present invention is said multilayer product, the repeating units derived from dicarboxylic acids being 90 to 100 mol% of terephthalic acid and 0 to 10 mol% of isophthalic acid and 0 to 10 mol% are derived from other dicarboxylic acids, and wherein the sum of the amount of the repeating units derived from terephthalic acid and derived from isophthalic acid and derived from the other dicarboxylic acids is 100 mol%, and wherein the repeating units derived from diols are 20 to 40 mol% % are derived from ethylene glycol and from 60 to 80 mol% from cyclohexanedimethanol and from 0 to 3 mol% from diethylene glycol and from 0 to 10 mol% from other diols, and the sum of the amount of the repeating units is derived from ethylene glycol and from Cyclohexanedimethanol and of diethylene glycol and of the other diols is 100 mol%.
  • the layer which contains the copolyester additionally contains 1 to 20% by weight of UV absorber.
  • the UV absorber is preferably selected from the group consisting of Tinuvin ® 360, Tinuvin ® 1577 and Uvinul ® 3030.
  • Tinuvin ® 360 Tinuvin ®
  • Tinuvin "360 has the following structure:
  • Tinuvin ® 1577 has the following structure:
  • Uvinu 1P® 3030 has the following structure:
  • those multilayer products are preferred in which the layer which contains the copolyester is 10 to 100 ⁇ m thick. It is preferably 15 to 300 ⁇ m thick and particularly preferably it is 30 to 100 ⁇ m thick.
  • those multilayer products are preferred which are selected from the group consisting of plates, tubes and profiles.
  • Plates can be solid sheets, in particular, which can be flat or corrugated. In addition, it can be multi-wall sheets, which can in particular be flat or corrugated.
  • Web plates are understood to be plates in which two outer layers are connected to one another by webs, so that cavities arise in the interior of the plate.
  • Double-skin sheets have two outer layers and intermediate bars.
  • Triple-wall sheets also have a third inner layer that is parallel to the two outer layers.
  • Such multi-wall sheets are described, for example, in EP-A 0 110 238. They are called multilayer hollow-chamber plastic sheets there.
  • EP-A 0 774 551 also discloses multi-wall sheets. In Figure 1 of EP-A 0 774 551 a triple wall plate is shown.
  • EP-A 0 054 856 and EP-A 0 741 215 also disclose multi-wall sheets.
  • the multi-skin sheets can be double-skin sheets, triple-skin sheets, quadruple-skin sheets, etc.
  • the multi-wall sheets can also have different profiles.
  • the multi-wall sheets can also be corrugated multi-wall sheets.
  • a preferred embodiment of the present invention is a two-layer plate consisting of a layer of polycarbonate and a layer of the copolyester according to the invention.
  • Another preferred embodiment of the present invention is a three-layer plate consisting of a layer of polycarbonate as the middle layer and two layers of the copolyester according to the invention as the outer layers.
  • the multilayer products are transparent.
  • the copolyester according to the invention can contain cyclohexanedimethanol. This has the following structure:
  • the copolyesters according to the invention can be produced by known processes.
  • the required monomers are known.
  • the monomers and also the copolyesters are commercially available.
  • the layer which contains the copolyester is also referred to below as the coextrusion layer or coex layer.
  • the layer that contains the polycarbonate is also referred to as the base layer.
  • Both the polycarbonate and the copolyester in the multilayer products according to the invention can contain additives.
  • the copolyester can in particular contain UV absorbers.
  • the UV absorbers or their mixtures are preferably present in the copolyester layers in concentrations of 0 to 20% by weight. 0.1 to 20% by weight are preferred, 2 to 10% by weight, particularly preferably 3 to 8% by weight are particularly preferred. If two or more copolyester layers are present, the proportion of UV absorber in these layers can be different.
  • UV absorbers examples include UV absorbers that can be used according to the invention.
  • R and X are identical or different and denote H or alkyl or alkylaryl.
  • These compounds are preferably in an amount of 0.00001 to 1.5% by weight, particularly preferably 0.01 to 1.0% by weight, very particularly preferably 0.1 to 0.5
  • R 3 and R 4 are also the same or different and denote H, Q-C 4 alkyl, C 5 -C 6 cycloalkyl, benzyl or C 6 -C 14 aryl.
  • n 1, 2, 3 or 4.
  • This compound is preferably in an amount of 0.00001 to 1.5% by weight, particularly preferably 0.01 to 1.0% by weight, and 3 to 10% by weight, very particularly preferably 0.1 to 0.5% and 4 to 8% by weight are present in the copolyester layer.
  • R, R, m and n have the meaning given for formula (II), and in which p is an integer from 0 to 3, q is an integer from 1 to 10,
  • Y equals -CH 2 -CH 2 -, - (CH 2 ) 3 -, - (CH 2 ) 4 -, - (CH 2 ) 5 -, - (CH 2 ) 6 -, or CH (CH 3 ) - CH 2 - is and R 3 and R 4 have the meaning given for formula (II).
  • This compound is preferably in an amount of 0.00001 to 1.5% by weight and 2 to 20% by weight, particularly preferably 0.01 to 1.0% by weight and 3 to 10% by weight, all particularly preferably 0.1 to 0.5% by weight and 4 to 8% by weight, are present in the copolyester layer.
  • R 1 , R 2 , R 3 , R 4 in formula (IV) are the same or different and are H or alkyl or CN or halogen and X is alkyl.
  • These compounds are preferably in an amount of 0.00001 to 1.0% by weight and
  • R 1 is C r alkyl to C 17 alkyl
  • R 2 is H or Ci-alkyl to C4-alkyl
  • n 0 to 20.
  • These compounds are preferably in an amount of 0.00001 to 1.0% by weight and
  • R 1 to R 40 may be the same or different and denote H, alkyl, CN or halogen.
  • R 1 to R 40 H (commercially available as Uvinul ® 3030).
  • This compound is preferably in an amount of 0.00001 to 1.0% by weight and 2 to 20% by weight, particularly preferably 0.01 to 1.0% by weight and 3 to 10% by weight, very particularly preferably 0.1 to 0.5% by weight and 4 to 8% by weight, are present in the copolyester layer.
  • UV absorbers mentioned are commercially available.
  • the copolyester layers and the polycarbonate layers can also contain other customary processing aids, in particular mold release agents and flow agents, and the stabilizers customary in polycarbonates, in particular thermal stabilizers and colorants and optical brighteners and inorganic pigments.
  • Polycarbonates for the multilayer products according to the invention are all known polycarbonates.
  • M w average molecular weights 18,000 to 40,000, preferably from 26,000 to 36,000 and in particular from 28,000 to 35,000, determined by measuring the relative solution viscosity in dichloromethane or in mixtures of equal amounts by weight of phenol / o-dichlorobenzene (5 g of polymer dissolved in 1 liter Solvent; measuring temperature: 25 ° C) calibrated by light scattering.
  • the polycarbonates are preferably produced by the phase interface process or the melt transesterification process and are described below by way of example using the phase interface process.
  • Compounds to be used preferably as starting compounds are bisphenols of the general formula
  • Z is a divalent organic radical having 6 to 30 carbon atoms and containing one or more aromatic groups.
  • Examples of such compounds are bisphenols which belong to the group of dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, indane bisphenols, bis (hydroxyphenyl) ethers,
  • Particularly preferred bisphenols belonging to the above-mentioned connecting 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, if appropriate, their mixtures.
  • the bisphenol compounds to be used according to the invention are preferred.
  • Carbonic acid compounds in particular phosgene, or in the melt re-process with diphenyl carbonate or dimethyl carbonate.
  • Polyester carbonates are preferably obtained by reacting the bisphenols already mentioned, 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.
  • Inert organic solvents used in the interfacial process are, for example, dichloromethane, the various dichloroethanes and chloropropane compounds, carbon tetrachloride, trichloromethane, chlorobenzene and chlorotoluene; chlorobenzene or dichloromethane or mixtures of dichloromethane and chlorobenzene are preferably used.
  • phase interface 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 branched deliberately and in a controlled manner by using small amounts of branching agents.
  • branching agents are: 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-tri- (4-hydroxyphenyl) benzene; 1,1,1-tri- (4-hydroxyphenyl) ethane; Tri- (4-hydroxyphenyl) -phenylmethane; 2,2-bis- [4,4-bis- (4-hydroxyphenyl) cyclohexyl] propane; 2,4-bis (4-hydroxyphenyl-isopropyl) -phenol; 2,6-bis (2-hydroxy-5'-methylbenzyl) -4-methylphenol; 2- (4-hydroxyphenyl) -2- (2,4-dihydroxyphenyl) propane; Hexa- (4- (4-hydroxyphenyl-
  • the 0.05 to 2 mol%, if appropriate, of branching agents or mixtures of the branching agents, based on diphenols used, can be used together with the diphenols, but also in a later stage of
  • Phenols such as phenol, alkylphenols such as cresol and 4-tert-butylphenol, chlorophenol, bromophenol, cumylphenol or mixtures thereof are preferably used as chain terminators in amounts of 1 to 20 mol%, preferably 2 to 10 mol%, per mol of bisphenol. Phenol, 4-tert-butylphenol and cumylphenol are preferred.
  • Chain-breaking branching agents can be added to the syntheses separately or together with the bisphenol.
  • Preferred polycarbonates 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 copolycarbonates based on the two monomers
  • the homopolycarbonate based on bisphenol A is particularly preferred.
  • the polycarbonate can contain stabilizers.
  • Suitable stabilizers are, for example, phosphines, phosphites or Si-containing stabilizers . and further compounds described in EP-A 0 500 496. Examples include triphenylphosphites, diphenylalkylphosphites, phenyldialkylphosphites, tris (nonylphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylene-diphosponite and tri-arylphosph.it. Triphenylphosphine and tris (2,4-di-tert-butylphenyl) phosphite are particularly preferred.
  • These stabilizers can be present in all layers of the multilayer product according to the invention. So both in the so-called base and in of or in the so-called coex layers. Different additives or concentrations of additives can be present in each layer.
  • the multilayer product according to the invention can contain 0.01 to 0.5% by weight of the esters or partial esters of monohydric to hexavalent alcohols, in particular the
  • Monohydric alcohols are, for example, stearyl alcohol, palmityl alcohol and
  • a dihydric alcohol is glycol.
  • a trihydric alcohol is, for example, glycerin.
  • Tetravalent alcohols are, for example, pentaerythritol and mesoerythritol.
  • pentavalent alcohols are arabite, ribite and xylitol.
  • Hexahydric alcohols are, for example, mannitol, glucitol (sorbitol) and dulcitol.
  • the esters are preferably the Monoester, diesters, triesters, Tetraester, Pentaester and hexaesters or mixtures thereof, particularly random mixtures, of saturated, aliphatic C lu to C 36 monocarboxylic acids and optionally hydroxy monocarboxylic acids, preferably with saturated aliphatic 4 to C 32 -Monocarboxylic acids and optionally hydroxy monocarboxylic acids.
  • the commercially available fatty acid esters in particular pentaerythritol and glycerol, may contain ⁇ 60% different partial esters due to the manufacturing process.
  • Saturated, aliphatic monocarboxylic acids with 10 to 36 carbon atoms are, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, hydroxystearic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid and montanic acids.
  • Preferred saturated, aliphatic monocarboxylic acids with 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 are particularly preferred.
  • saturated, aliphatic C 10 to C 36 carboxylic acids and the fatty acid esters as such 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 glycerol with stearic acid and palmitic acid and optionally hydroxystearic acid are also particularly preferred.
  • esters can be present both in the base and in or in the coex layers. Different additives or concentrations can be present in each layer.
  • the multilayer products according to the invention can contain antistatic agents.
  • antistatic agents are cationic compounds, for example quaternary ones
  • Preferred antistatic agents are nonionic compounds. These antistatic agents can be present both in the base and in or in the coex layers. Different additives or concentrations can be present in each layer. They are preferably used in or in the coex layers.
  • the multilayer products according to the invention can contain organic dyes, inorganic color pigments, fluorescent dyes and particularly preferably optical brighteners.
  • colorants can be present both in the base and in or in the coex layers. Different additives or concentrations can be present in each layer.
  • All molding compositions used for the production of the multilayer products according to the invention can be contaminated with corresponding impurities from their production and storage, the aim being to work with starting materials which are as clean as possible.
  • the individual constituents can be mixed in a known manner both successively and simultaneously, both at room temperature and at elevated temperature.
  • the incorporation of the additives into the molding compositions according to the invention, in particular of the UV absorbers and other additives mentioned above, is preferably carried out in a known manner by mixing polymer granules with the additives at temperatures of about 200 to 330 ° C. in conventional units such as internal kneaders, single-screw extruders and twin-screw extruders, for example by melt compounding - or melt extrusion or by mixing the solutions of the polymer with solutions of the additives and subsequent evaporation of the solvents in a known manner.
  • the proportion of additives in the molding composition can be varied within wide limits and depends on the desired properties of the Molding compound.
  • the total proportion of the additives in the molding composition is preferably up to about 20% by weight, preferably 0.2 to 12% by weight, based on the weight of the molding composition.
  • the UV absorbers can also be incorporated into the molding compositions, for example, by mixing solutions of the UV absorbers and, if appropriate, other additives mentioned above with solutions of the plastics in suitable organic solvents such as CH 2 C1, haloalkanes, halogen aromatics, chlorobenzene and xylenes.
  • suitable organic solvents such as CH 2 C1, haloalkanes, halogen aromatics, chlorobenzene and xylenes.
  • the substance mixtures are then preferably homogenized in a known manner via extrusion; the solution mixtures are preferably known
  • the use of the coextrusion molding compositions according to the invention offers a significant advantage on any polycarbonate molding compositions as base material.
  • the processing of the multilayer products according to the invention e.g. by deep drawing or by surface processing, e.g. Finishing with scratch-resistant lacquers, water-spreading layers and the like are possible and the products produced by these processes are also the subject of the present invention.
  • Extruders for producing the core layer and cover layer (s) are connected to a coextrusion adapter.
  • the adapter is constructed in such a way that the melt forming the cover layers) is adhered to the melt of the core layer as a thin layer.
  • the multilayer melt strand produced in this way is then brought into the desired shape (web or solid sheet) in the connected nozzle.
  • Calendering solid plate
  • vacuum calibration multi-wall plate
  • a tempering furnace can be installed after the calibration to eliminate stresses.
  • the adapter attached in front of the nozzle the nozzle itself can also be designed such that the melts are brought together there.
  • 3 mm solid sheets A and B as described, for example, in EP-A 0 065 619, were obtained from the following molding compositions.
  • Makrolon ® 3103 linear bisphenol-A polycarbonate from Bayer. was used as the base material for the plates A, B, C and D.
  • Spectar ® 14471 contains 65 to 71 mol% ethylene glycol and 26 to 35 mol% cyclohexanedimethanol and 1.5 to 3 mol% diethylene glycol and 100 mol% terephthalic acid.
  • the thickness of the coex layer was approximately 100 ⁇ m in each case.
  • the machines and apparatus used for the production of multilayer solid sheets are described below. They include:
  • the polycarbonate granulate of the base material was fed to the hopper of the main extruder, the PETG coextrusion material that of the coextruder.
  • the respective material was melted and conveyed in the respective plasticizing system cylinder / screw. Both material melts were brought together in the coextrusion die and formed a composite after leaving the die and cooling in the calender.
  • the other facilities were used to transport, cut to length and lay down the extruded sheets.
  • a 110 mm x 35 mm x 3 mm plate was stuck with four strips of double-sided adhesive tape (5 mm wide) so that a 4.5 cm x 2.5 cm chamber was created.
  • Jil Sander Woman III contains, among other things, water and ethanol. There are also essential oils.
  • the organic cleaner contains, among other things, surfactants, salts of organic acids and solubilizers.
  • the test with cyclohexane is important because cyclohexane is used as a solvent in paints.

Abstract

L'invention concerne un produit multicouche qui comprend une couche contenant du polycarbonate et une couche contenant un copolyester. Les motifs récurrents du copolyester sont dérivés d'acides dicarboxyliques et de diols. Les motifs récurrents du copolyester dérivés d'acides dicarboxyliques sont dérivés de 50 à 100 % en moles d'acide téréphtalique et de 0 à 50 % en moles d'acide isophtalique et de 0 à 10 % en moles d'autres acides carboxyliques, la somme des proportions de motifs récurrents dérivés d'acide téréphtalique, d'acide isophtalique et des autres acides carboxyliques étant égale à 100 % en moles. Les motifs récurrents dérivés de diols sont dérivés de 0 à 97 % en moles d'éthylèneglycol, de 0 à 97 % en moles de cyclohexanediméthanol, de 0 à 3 % en moles de diéthylèneglycol et de 0 à 10 % en moles d'autres diols, la somme des proportions de motifs récurrents dérivés d'éthylèneglycol, de cyclohexanediméthanol, de diéthylèneglycol et des autres diols étant égale à 100 % en moles. L'invention concerne en outre un procédé pour préparer ce produit multicouche, ainsi que d'autres produits qui contiennent ledit produit multicouche.
EP02781324A 2001-12-04 2002-11-21 Produit multicouche Withdrawn EP1453673A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001159373 DE10159373A1 (de) 2001-12-04 2001-12-04 Mehrschichtiges Erzeugnis
DE10159373 2001-12-04
PCT/EP2002/013062 WO2003047856A1 (fr) 2001-12-04 2002-11-21 Produit multicouche

Publications (1)

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EP1453673A1 true EP1453673A1 (fr) 2004-09-08

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EP02781324A Withdrawn EP1453673A1 (fr) 2001-12-04 2002-11-21 Produit multicouche

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US (1) US20030152775A1 (fr)
EP (1) EP1453673A1 (fr)
JP (1) JP2005511349A (fr)
KR (1) KR20040068181A (fr)
CN (1) CN1599668A (fr)
AU (1) AU2002349040A1 (fr)
BR (1) BR0206971A (fr)
CA (1) CA2468914A1 (fr)
DE (1) DE10159373A1 (fr)
IL (1) IL162135A0 (fr)
MX (1) MXPA04005370A (fr)
RU (1) RU2004120555A (fr)
TW (1) TW200303820A (fr)
WO (1) WO2003047856A1 (fr)

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Also Published As

Publication number Publication date
RU2004120555A (ru) 2006-01-10
WO2003047856A1 (fr) 2003-06-12
DE10159373A1 (de) 2003-06-12
AU2002349040A1 (en) 2003-06-17
BR0206971A (pt) 2004-03-09
CN1599668A (zh) 2005-03-23
CA2468914A1 (fr) 2003-06-12
KR20040068181A (ko) 2004-07-30
JP2005511349A (ja) 2005-04-28
IL162135A0 (en) 2005-11-20
US20030152775A1 (en) 2003-08-14
TW200303820A (en) 2003-09-16
MXPA04005370A (es) 2004-09-27

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