EP1297083A1

EP1297083A1 - Compositions containing polycarbonate

Info

Publication number: EP1297083A1
Application number: EP01940533A
Authority: EP
Inventors: Rüdiger Gorny; Siegfried Anders; Wolfgang Nising
Original assignee: Bayer AG
Current assignee: Covestro Deutschland AG
Priority date: 2000-06-08
Filing date: 2001-05-28
Publication date: 2003-04-02
Also published as: KR20030025233A; CA2411697A1; CN1238452C; KR100684225B1; JP2004504414A; US6960623B2; HK1055127A1; AU2001274074B2; AU7407401A; US20030158300A1; IL153090A; MXPA02012112A; TW538105B; CN1432052A; IL153090A0; DE10028412A1; BR0111403A; WO2001094486A1

Abstract

The invention relates to the use of special triazines for producing compositions containing polycarbonate, said triazines, and fatty acid esters. The invention also relates to the compositions, a method for manufacturing products containing these compositions, and said products.

Description

Compositions containing polycarbonate

The present invention relates to the use of special triazines for the production of compositions containing polycarbonate and these triazines and

Fatty acid esters and the compositions, a process for the production of products containing these compositions and these products.

Polycarbonate sheets are known from EP-A 0 110 221 and are provided for a large number of applications. The production takes place e.g. by extrusion of compositions containing polycarbonate and optionally coextrusion with further compositions containing polycarbonate, which contain an increased proportion of UV absorbers.

This is a recurring problem in the extrusion of such sheets

Deposition of volatile components from the molding compound.

On the machines used to manufacture the plates, volatile components are deposited on calibrators during the extrusion of multi-wall sheets and on rollers during the extrusion of solid sheets. Both can lead to surface defects on the plates.

Volatile constituents are, for example, UV absorbers, mold release agents and other low-molecular constituents of the compositions comprising polycarbonate.

EP-A 0 320 632 describes coextruded sheets made from compositions containing polycarbonate, which contain a low-volatility UV absorber and can additionally contain a lubricant. The disadvantage is that with a longer duration of extrusion, the surface of the plates is adversely affected, particularly during coextrusion.

This is done, for example, by evaporation from the polycarbonate melt. The increased leakage of the UV absorber from the polycarbonate melt leads to the formation of deposits on the calibrator or the rollers and finally to the formation of defects in the plate surface (eg white spots, waviness, etc.). At the calibrator, the polycarbonate abrasion also leads to powdery deposits on the coextruded polycarbonate sheets.

From WO 99/05205 it is known that mixtures of mold removers e.g. from fatty acid esters of pentaerythritol and glycerol can be used to form deposits on the calibrator or on the rollers, which lead to the formation of faults in the

Panel surface (e.g. white spots, waviness, etc.).

The use of various UV absorbers based on substituted triazines for polycarbonate is known; e.g. from JP-A 09-176476, JP-A 09-057881, JP-A 09-057813 and EP-A 0 825 226.

JP-A 08-176 476 describes polycarbonate compositions containing triazines and plates and films coated therewith.

JP-A 09-057 881 describes corrugated columns made of plastic which are coated with polycarbonate compositions containing triazines.

JP-A 09-057 813 describes a special manufacturing process for polycarbonate sheets which contain triazines in the top layer.

EP-A 0 649 724 describes a process for the production of multilayer plastic sheets from branched polycarbonates with molecular weights Mw of 27,000 to 29,500 g / mol by coextrusion of a core layer and at least one cover layer with 1 to 15% by weight of a UV absorber. In the molding compositions for producing these plastic sheets, the mold release agents described in EP-A 0 300 485 are glycerol monostearate, pentaerythritol tetrastearate and mixtures thereof Glycerein monostearate is used as the main component, but the surfaces of the plates deteriorate over time.

The present invention is therefore based on the object of providing compositions comprising polycarbonate which, in extrusion or coextrusion, do not have the disadvantages of the prior art mentioned.

The present invention is also based on the object of providing products, in particular multilayer boards, which contain the compositions according to the invention.

The object of the invention is achieved by using compounds of the formula (I)

in which

R ¹ , R ² , R ³ and R ^{4 are the} same or different and are selected from the group consisting of C _j alkyl to Cg alkyl, halogen and -CN, and

R ⁵ is H or Ci-alkyl to C ₂ o-alkyl,

for the preparation of compositions containing polycarbonate and fatty acid esters and one or more compounds of the formula (I). R ⁵ is preferably n-octyl.

R ¹ , R ² , R ³ and R ⁴ are also preferably methyl. R ⁵ is particularly preferably n-octyl and R ¹ , R ² , R ³ and R ⁴ are methyl.

The object of the invention is further achieved by compositions comprising polycarbonate and fatty acid esters and one or more compounds of the formula (I).

In a preferred embodiment of the present invention, the compositions according to the invention contain 0.02 to 1% by weight of fatty acid esters. These are preferably selected from the group consisting of pentaerythritol tetrastearate, glycerol monostearate and mixtures of these two.

In a preferred embodiment of the present invention, the compositions according to the invention additionally contain 10 ppm to 3000 ppm thermal stabilizers.

The thermal stabilizers are preferably selected from the group consisting of tris (2,4-di-tert-butylphenyl) phosphite and triphenylphosphine.

The object according to the invention is further achieved by a method for producing products containing a composition according to the invention by extrusion or coextrusion or injection molding. Extrusion or coextrusion are preferred.

The object according to the invention is further achieved by a product containing a composition according to the invention. The object according to the invention is further achieved by a multilayer product, at least one of the outer layers containing a composition according to the invention.

The object according to the invention is further achieved by a product containing a composition according to the invention, the product being selected from the group consisting of plate, solid plate, multi-wall sheet, corrugated solid sheet, corrugated multi-wall sheet, web profile, glazing, glazing of greenhouses, winter garden, bus stop, billboard, Shield, protective screen, automobile window, window and roof.

Particularly preferred products according to the invention are multilayer boards which contain a composition according to the invention in at least one of the two outer layers.

The products according to the invention contain a composition according to the invention. They preferably consist essentially of a composition according to the invention. They particularly preferably consist of a composition according to the invention. In the case of multi-layer products, this applies to one or more layers of the product.

The composition according to the invention is preferably applied as a preferably 5 to 80 μm thick cover layer to a polycarbonate plate, the application is preferably carried out by coextrusion.

The compositions according to the invention preferably contain 1 to 7% by weight, particularly preferably 2 to 5% by weight, of compounds of the formula (I).

The compounds of the formula (I) can be prepared by known processes. According to WO 00/14075, US-A 556 973,

US-A 5 648 488 or US-A 5 675 004. Certain representatives of the association Extensions of the formula (I) are commercially available, for example under the name Cyasorb® UV 1164 from Cytec Industries BV, Botlek, the Netherlands.

The compositions according to the invention containing polycarbonate have proven to be particularly advantageous. They can be processed without any problems and show no impairments in the products obtained as a product. Surprisingly, it has been found that when these compounds are used, additives known from the art of compositions containing polycarbonate no longer lead to the problems described at the beginning.

According to the invention, polycarbonates are homopolycarbonates, copolycarbonates or thermoplastic polyester carbonates. They preferably have average molecular weights M _w of 18,000 to 40,000 g / mol, preferably of 26,000 to 36,000 g / mol and in particular of 28,000 to 35,000 g / mol, determined by measuring the rel.

Solution viscosity in dichloromethane or in mixtures of equal amounts by weight of phenol / o-dichlorobenzene calibrated by light scattering.

The melt viscosity of the composition containing polycarbonate should preferably be lower than that of the substrate to which it is applied when multilayer products are produced.

For the production of polycarbonates for the compositions containing polycarbonate, examples include "Schnell", Chemistry and Physics of Polycarbonates, Polymer Reviews, Vol. 9, Interscience Publishers, New York, London, Sydney 1964, DC PREVORSEK, BT DEBONA and Y. KESTEN , Corporate Research Center, AUied Chemical Corporation, Moristown, New Jersey 07960, "Synthesis of Poly (ester) carbonate Copolymers" in Journal of Polymer Science, Polymer Chemistry Edition, Vol. 19, 75-90 (1980), on D. Freitag , U. Grigo, PR Müller, N. Nouvertne, BAYER AG, "Polycarbonates" in Encyclopedia of Polymer Science and

Engineering, Vol. 11, Second Edition, 1988, pages 648-718 and finally on Dres. U. Grigo, K. Kircher and PR Müller "Polycarbonate" in Becker / Braun, Plastic Manual, Volume 3/1, Polycarbonate, Polyacetale, Polyester, Cellulose Ester, Carl Hanser Verlag Munich, Vienna 1992, pages 117- 299 referenced.

Production is preferably carried out using the phase interface process or the melt transesterification process and is described using the phase interface process as an example.

Compounds to be used preferably as starting compounds are bisphenols of the general formula HO-Z-OH, in which Z is a divalent organic radical with 6 to

30 carbon atoms containing one or more aromatic groups.

Examples of such compounds are bisphenols belonging to the group of dihydroxy-diphenyls, bis (hydroxyphenyl) alkanes, indane bisphenols, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) ketones and α, 'bis (hydroxyphenyl) ) -diisopropylbenzenes belong.

Particularly preferred bisphenols belonging to the abovementioned 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 optionally their mixtures.

Particularly preferred polycarbonates are homopolycarbonates based on bisphenol-A and copolycarbonates based on the monomers bisphenol-A and 1,1-

Bis (4-hydroxyphenyl) -3,3,5-1τimethylcyclohexan.

The bisphenols to be used according to the invention are reacted with carbonic acid compounds, in particular phosgene, or diphenyl carbonate or dimethyl carbonate in the melt transesterification process. Polyester carbonates are 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. Up to 80 mol%, preferably from 20 to 50 mol%, of the carbonate groups in the polycarbonates can be replaced by aromatic dicarboxylic acid ester groups in the case of polyester carbonates.

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.

The phase interface reaction can be accelerated by catalysts such as tertiary amines, in particular N-alkylpiperidines or onium salts. Tributylamine, triethylamine and N-ethylpiperidine are preferably used.

In the case of the melt transesterification process, the catalysts mentioned in DE-A 42 38 123 are preferably used.

The use of small amounts of branching agents allows the polycarbonates to be deliberately and controlled branched. Some suitable 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; l, 3,5-tri- (4-hydroxyphenyl) benzene; l, l, l-tri- (4-hydroxyphenyl) ethane; Tri- (4-hydroxyphenyl) -phenylmethane; 2,2-bis- [4,4-bis- (4-hydroxy-ρhenyl) cyclohexyl] propane; 2,4-bis (4-hydroxyphenyl-isopropyl) -phenol; 2,6-bis (2-hydroxy-5 ^, -methyl-benzyl) -4-methylphenol; 2- (4-hydroxyphenyl) -2- (2,4-dihydroxyphenyl) propane; Hexa- (4- (4-hydroxyphenyl-isopropyl) phenyl) orthoterephthalic acid ester; Tetra (4-hydroxyphenyl) methane; Tetra- (4- (4-hydroxyphenyl-isopropyl) phenoxy) methane; α, α ¹ , α "-Tris- (4-hydroxyphenyl) -l, 3,5-triisopropylbenzene; 2,4-dihydroxybenzoic acid; trimesic; cyanuric chloride; 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole; l ₃ 4-bis ^(4, 4 "-dihydroxytriphenyl) methyl) - benzene, and in particular: l, l, l-tri- (4-hydroxyphenyl) ethane and bis (3-mefhyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole.

The optionally used 0.05 to 2 mol%, based on the bisphenols used, of branching agents or mixtures of the branching agents can be used together with the bisphenols but can also be added at a later stage in the synthesis.

Chain breakers can be used. 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 preferably 1-20 mol%, particularly preferably 2-10 mol% each Moles of bisphenol. Phenol, 4-tert-butylphenol and cumylphenol are preferred.

Chain terminators and branching agents can be added to the syntheses separately or together with the bisphenol.

The preparation of the polycarbonates for the compositions according to the invention containing polycarbonate by the melt transesterification process is described by way of example in DE-A 42 38 123.

The incorporation of the UV absorbers, in particular the incorporation of the compounds of the formula (I), into the compositions comprising polycarbonate according to the invention is carried out by customary methods, for example by mixing solutions of the UV absorbers with solutions of the polycarbonates in suitable organic solvents such as CH ₂ C1 ₂ , haloalkanes, halogen aromatics, chlorobenzene and xylenes. The substance mixtures are then preferably homogenized in a known manner via extrusion; the solution mixtures are known in Way removed, for example by evaporation of the solvent and subsequent extrusion, for example compounded.

The compositions containing polycarbonate can additionally contain stabilizers.

Suitable stabilizers for the polycarbonates for the compositions containing polycarbonate are, for example, phosphines, phosphites or Si-containing stabilizers and further compounds described in EP-A 0 500 496. Examples include triphenyl phosphites, diphenylalkyl phosphites, phenyl dialkyl phosphites, tris (nonylphenyl) phosphite, tetrakis (2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosponite and triaryl phosphite. Triphenylphosphine and tris (2,4-di-tert-butylphenyl) phosphite are particularly preferred.

The molding composition according to the invention contains fatty acid esters. These are (part) esters of tetra- to hexavalent alcohols, especially pentaerythritol.

Tetravalent alcohols are, for example, pentaerythritol and mesoerythritol.

Examples of pentavalent alcohols are arabite, ribite and xylitol.

Hexahydric alcohols are, for example, mannitol, glucitol (sorbitol) and dulcitol.

The esters are the monoesters, diesters, triesters, tetraesters, optionally pentaesters and hexaesters or their mixtures, in particular static mixtures, of saturated, aliphatic Cχo to C26 monocarboxylic acids, preferably with saturated, aliphatic C14 to C ₂ 2 -monocarboxylic acids.

The commercially available fatty acid esters, in particular pentaerythritol, can contain <60% of different partial esters due to the manufacturing process. Saturated, aliphatic monocarboxylic acids with 10 to 26 carbon atoms are, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid, lignoceric acid and cerotic acid.

Preferred saturated, aliphatic monocarboxylic acids with 14 to 22 carbon atoms are, for example, myristic acid, palmitic acid, stearic acid, arachic acid and behenic acid.

Saturated, aliphatic monocarboxylic acids such as palmitic acid and stearic acid are particularly preferred.

The saturated, aliphatic C ₁₀ to C 26 carboxylic acid and the fatty acid esters to be used according to the invention are either known as such or can be prepared by processes known from the literature. Examples of pentaerythritol fatty acid esters are those of the particularly preferred monocarboxylic acids mentioned above.

Esters of pentaerythritol with stearic acid and palmitic acid are particularly preferred.

The molding composition according to the invention may further contain glycerol monofatty acid esters.

Glycerol monofatty acid esters are esters of glycerol with saturated, aliphatic CJO to C ₂ 6 -monocarboxylic acids, preferably with saturated, aliphatic C14 to C22 onocarboxylic acids. Their higher volatility no longer leads to the problems described at the outset in the case of the molding composition according to the invention.

Glycerol monofatty acid esters are to be understood as meaning both those of the primary OH function of glycerol and those of the secondary OH function of glycerol and mixtures of these isomeric classes of compounds. Due to the manufacturing process, the glycerol monofatty acid esters can contain <50% of different diesters and triesters of glycerol. Saturated, aliphatic monocarboxylic acids with 10 to 26 carbon atoms are, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid, lignoceric acid and cerotic acid.

Saturated aliphatic monocarboxylic acids are particularly preferably palmitic acid stearic acid.

The saturated, aliphatic CJO to C26 carboxylic acids and the glycerol monofatty acid esters to be used according to the invention are either known from the literature as such or can be prepared by processes known from the literature (see, for example, Fieser and Fieser, Organische Chemie GmbH, Weinheim, Bergstr. 1965, chapter 30, page

1206 ff.). Examples of glycerol monofatty acid esters are those of the particularly preferred monocarboxylic acids mentioned above.

The compositions containing polycarbonate can additionally contain antistatic agents. Examples of antistatic agents are cationic compounds, for example quaternary ammonium, phosphonium or sulfonium salts, anionic compounds, for example alkylsulfonates, alkylsulfates, alkylphosphates, carboxylates in the form of alkali metal or alkaline earth metal salts, nonionic compounds, for example polyethylene glycol esters, polyethylene glycol ethers, fatty acid esters, ethoxy fatty acids , Preferred antistatic agents are nonionic compounds.

Furthermore, the compositions according to the invention and the products produced therefrom can contain organic dyes, inorganic color pigments, fluorescent dyes and particularly preferably optical brighteners. All of the starting materials and solvents used for the synthesis of the compositions according to the invention containing polycarbonate 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 additives are incorporated into the compositions containing polycarbonate in a known manner, for example by mixing polymer granules with the additives at temperatures of about 200 to 330 ° C. in conventional units such as internal kneaders, extruders and twin-screw extruders, for example by melt compounding or melt extrusion or by mixing the solder - 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 compositions containing polycarbonate can be varied within wide limits and depends on the desired properties of the compositions containing polycarbonate. The total proportion of the additives in the compositions containing polycarbonate is preferably up to 20% by weight, preferably 0.2 to 12% by weight, based on the weight of the compositions containing polycarbonate.

As the examples according to the invention demonstrate, the use of the compositions according to the invention containing polycarbonate as a coextrusion layer offers a significant advantage over any other compositions containing polycarbonate as the base material of sheets. This advantage occurs in particular even if the plate base material is also equipped with the UV absorber and the mold release agent of the compositions according to the invention containing polycarbonate. The compositions containing polycarbonate can be used to produce solid plastic sheets and so-called multi-wall sheets (eg double wall sheets, triple-wall sheets etc.). The plates also include those which have an additional cover layer with the composition according to the invention containing polycarbonate on one or both sides.

The compositions according to the invention containing polycarbonate make it easier to manufacture products, in particular sheets and products made from them, such as e.g. Glazing for greenhouses, conservatories,

Bus stops, billboards, signs, protective windows, automotive windows, windows or roofs.

Subsequent processing of the products coated with the compositions containing polycarbonate according to the invention, such as Deep drawing or 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.

Coextrusion as such is known from the literature (see, for example, EP-A 0 110 221 and EP-A 0 110238). The procedure is preferably as follows:

Extruders for producing the core layer and cover layer (s) are connected to a coextrusion adapter. The adapter is designed in such a way that the melt forming the cover layer is adhered to the melt of the core layer as a thin layer.

The multilayer melt strand thus produced is then brought into the desired shape (multi-wall or solid sheet) in the nozzle connected subsequently. Then, in a known manner, using calendering (solid sheet) or

Vacuum calibration (multi-wall sheet) the melt under controlled conditions cooled and then cut to length. If necessary, a tempering furnace can be installed after the calibration to eliminate stresses. Instead of the adapter attached in front of the nozzle, the nozzle itself can also be designed such that the melt is brought together there.

The invention is further illustrated by the following examples without being restricted to these.

Examples

10 mm twin-wall sheets AE, as they are described for example in EP-A 0110238 were obtained from the following compositions containing polycarbonate: The base material used was Makrolon ^® KU 1-1243 (branched bisphenol-A

Polycarbonate from Bayer AG, Leverkusen, Germany with a melt flow index (MFR) of 6.5 g / 10 min at 300 ° C and 1.2 kg load). This with the one indicated in the table Compounds based Makrolon ^® 3100 (linear bisphenol-A polycarbonate was coextruded from Bayer AG, Leverkusen, Germany with a melt flow rate (MFR) of 6.5 g / 10 min at 300 ° C and 1.2 kg

Burden).

The thickness of the coex layer was approximately 50 μm in each case.

^*) Pentaerythritol tetrastearate, commercially available, for example as Loxiol ^@ EP 129 from Cognis, Dusseldorf, Germany.

^{* #)} Glycerol monostearate, commercially available, for example as Loxiol ^® VPG 861 from Cognis, Düsseldorf, Germany

Tris (2,4-di-tert-butylphenyl) phosphite from Ciba Specialty Chemicals, Lampertheim, Germany

Tinuvin® 360 is 2,2-methylenebis (4- (l, l, 3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol. Compound II (commercially available as Tinuvin® 1577):

The machines and apparatus used to manufacture the multilayer multi-wall sheets are described below:

The facility consisted of

the main extruder with a screw with a length of 33 D and a diameter of 70 mm with degassing the coex adapter (feedblock system) a coextruder for applying the top layer with a screw with a length of 25 D and a diameter of 30 mm the special slot die with a width of 350 mm - the Calibrator of the roller conveyor of the take-off device of the cutting device (saw) the deposit table.

The polycarbonate granulate of the base material was fed to the hopper of the main extruder, the UV coextrusion material to 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 coex adapter and formed after leaving the nozzle and cooling in the calibrator a network. The other facilities were used to transport, cut to length and lay down the extruded sheets.

Coextrusion with A (reference): first small deposits after 4 hours after 3 hours at irregular intervals, light transverse waves that slightly affect the plate quality. Cross waves slightly stronger after 4 hours. Note: good

Coextrusion with B: no deposits over a test period of 5 hours. The cross waviness is very low over the entire test period, so that the plate quality is not negatively affected - grade: very good

Coextrusion with C: first small deposits after 2 h after 150 minutes, light cross waves appearing at irregular intervals, which have a slightly negative effect on the plate quality.

Strong cross waves after 3.5 hours. Note: bad

Coextrusion with D: - first small deposits after 50 minutes after 60 minutes at irregular intervals, light transverse waves that slightly negatively affect the plate quality. Strong cross waves after 3 hours. Note: bad Coextrusion with E: no deposits over a test period of 5 hours. The transverse ripple is very low over the entire test period, so that the plate quality is not negatively affected - grade: very good

Example C shows that very poor plate qualities are achieved with compound II.

The volatility of the compound of formula (I) and compound (II) are very similar (Table 1). It could therefore be expected that the chemically very similar compound of formula (I) with the same mold release agent mixtures in compositions containing polycarbonate would achieve an equally poor surface quality. Surprisingly, however, it has been shown that good plate qualities could be produced over a significantly longer period of time. The plate quality remained better for a longer time than with the composition described in WO 99/05205 (here for plate A).

The comparison of experiments B and D shows that only in the case of the ternary composition due to a surprising synergistic effect

Coextrusion leads to high quality sheets.

Table 1

Volatility measurement using thermogravimetric analysis (TGA) according to ISO 7112 under nitrogen

Claims

claims

1. Use of compounds of the formula (I)

in which

R ⁵ is H or Ci-alkyl to C ₂₀ alkyl,

for the preparation of compositions containing polycarbonate and fatty acid esters and one or more compounds of the formula (I).

Composition containing polycarbonate and fatty acid esters and one or more compounds of the formula (I)

in which

R ¹ , R ² , R ³ and R ^{4 are the} same or different and are selected from the group consisting of Cj-alkyl to C-alkyl, halogen and -CN, and

R ⁵ is H or Ci-alkyl to C ₂₀ alkyl.

3. The composition according to claim 2, wherein the concentration of the compounds of the formula (I) in the composition is 1 to 7% by weight.

4. The composition of claim 2 or 3, wherein the composition contains 0.02 to 1 wt .-% fatty acid ester.

5. The composition of claim 4, wherein the fatty acid esters are selected from the group consisting of pentaerythritol tetrastearate, glycerol monostearate and mixtures of these two.

6. Composition according to one of claims 2 to 5, wherein the composition additionally contains 10 ppm to 3000 ppm thermal stabilizers.

7. Composition according spoke 6, wherein the thermal stabilizers are selected from the group consisting of tris (2,4-di-tert-butylphenyl) phosphite and triphenylphosphine.

8. Use of the compositions according to any one of claims 2 to 7 for the manufacture of products by extrusion or coextrusion or injection molding.

9. A method for producing products containing a composition according to any one of claims 2 to 7 by extrusion or coextrusion or injection molding.

10. Product containing a composition according to any one of claims 2 to 7.

11. A multilayer product, wherein at least one of the outer layers contains a composition according to claims 2 to 7.

12. Product according to claim 10 or 11, selected from the group consisting of plate, solid sheet, multi-wall sheet, corrugated solid sheet, corrugated multi-wall sheet, web profile, glazing, glazing of greenhouses, winter garden, bus stop, billboard, sign, protective pane, automotive glazing, window and canopy.