Improved pet composition

Abstract

The present invention relates to a composition, which is obtainable by mixing at least a first polymer composition and a second polymer composition and is used for packaging of food and drinking products, which may be oxygen sensitive. In particular, the present invention relates to a composition, which may be used as a glass replacement.

Description

[0001] Improved PET composition

[0002] The present invention relates to a polyethylene terephthalate (PET) composition, which is obtainable by mixing at least a first polymer composition and a second polymer composition and is used for packaging of food and drinking products, which may be oxygen sensitive. In particular, the present invention relates to a composition, which may be used as a glass replacement.

[0003] Many food and beverage products are sensitive to oxygen and suffer significant loss of their freshness and taste. Usually very sensitive food and beverage products are traditionally packaged in metal and glass containers which are insensitive to oxygen diffusion. However, glass and metal containers are usually expensive very heavy, not ease to use for consumers and have a high CO2-footprint. Therefore, in the recent years and decades PET bottles and packaging materials have developed as a common alternative for these heavy and un-ease used packaging materials such as metal or glass containers. Further, the aspect of re-use and recycling is getting more and more important for customers.

[0004] PET bottles come with certain advantages such as a better economics, lighter weight, increased breakage resistance and better consumer acceptance. Additionally, PET polymers bring together the unique combination of clarity, toughness, and moderate costs and a lower CO2-footprint.

[0005] PET is an abbreviation for polyethylene terephthalate and is the most common used thermoplastic polymer resin of the polyester families. Even though they come with a moderate gas barrier function it is usually not sufficient to prolong the shelf life of food and beverage in a way which would be possible with glass containers. Therefore, blends of barrier polymers in combination with PET have been used to improve the oxygen barrier of packages. Suitable oxygen scavenging materials include polyethers, which are usually used as polyester-ether copolymers in low amounts. In the past barrier materials based on polyether, polyester block copolymers have been developed that are compatible with PET and thus from substantially clear containers blended with PET and blow moulded into the desired shape, which provide high oxygen scavenging capability. However, those containers suffer from a significant drawback in that they become hazy upon impact.

[0006] Another big issue with these PET bottles trying to replace glass bottles is the acceptance of the customers. For example, when it comes to beer or wine bottles customers tend still to want to have a real glass bottle instead of a PET bottle as it gives an appearance of higher quality of the product or the producer. Therefore, there is a need to provide a new polyester for PET bottles of packaging material which imitates a high-quality glass and is therefore accepted by customers. With this, it will be possible to replace the expensive glass bottles in the food and beverage industry.

[0007] Surprisingly, the polymer blend of the invention has shown to be accompanied by both a good oxygen barrier and that it can mimic glass very well at the same time in a monolayer. The polymer blend of the invention is surprisingly clear and transparent. This is achieved by using a composition that provides at least two polymers in a blend one based on PET and the other on tetra hydrofuran. In a first embodiment, the problem underlying to the present invention is therefore solved by a composition obtainable by mixing at least one first polymer composition and at least one second polymer composition with each other characterized in that the first polymer composition comprises:

[0008] (i) at least one polyester based on ethylene glycol and terephthalic acid,

[0009] (ii) at least one metal compound suitable for scavenging oxygen in the composition,

[0010] (iii) at least one first polymerization catalyst preferably having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and the second polymer composition comprises:

[0011] (a) at least one polymer based on tetrahydrofuran, and

[0012] (b) at least one second polymerization catalyst. The first polymer composition according to the present invention comprises at least a metal compound which is able to catalyse a reaction in the second tetrahydrofuran-based polymer composition which will scavenge the oxygen molecules. By this, the composition according to the present invention avoids the need for an additional barrier layer for oxygen scavenging, but the final composition itself comprises the oxygen scavenging components. This provides easier manufacturing of packaging materials in the food or beverage industry since the necessity of at least two layers is eliminated. It is possible to maintain or even lower the oxygen amount in a container made from the composition according to the invention, which corresponds to a significantly prolonged shelf life, preferably for at least 12 months, especially for at least 2 years.

[0013] Generally, polyesters suitable for the present disclosure can be prepared by processes, namely, and not limited to (1) the ester process and (2) the acid process. The ester process is where a dicarboxylic ester (such as dimethyl terephthalate or the corresponding free terephthalic acid) is reacted with ethylene glycol or other diol in an ester interchange reaction. Catalysts for use in the ester interchange reaction are well known and may be selected from manganese, zinc, cobalt, titanium, calcium, magnesium or lithium compounds. Because the reaction is reversible, it is generally necessary to remove the alcohol (e.g. methanol when dimethyl terephthalate is employed or water when the free acid is employed) to completely convert the raw materials into monomers. The catalytic activity of the interchange reaction catalyst may optionally be sequestered by introducing a phosphorus compound, for example polyphosphoric acid, at the end of the ester interchange reaction. Then the monomer undergoes polycondensation. The catalyst employed in this reaction is typically an antimony, germanium, aluminium, zinc, tin or titanium compound, or a mixture of these. In preferred embodiments, it may be advantageous to use a titanium compound. The polymerization catalyst will also be described later in more detail.

[0014] Furthermore, the composition according to the invention provides properties that imitate glass containers very well, such as high transparency and high gas tightness, even in thick-walled containers. Thus, the composition according to the invention combines the properties of glass and PET bottles and provides an alternative for glass, especially in the food or beverage industry. The first and / or second, especially the second polymer composition may further comprise at least one antioxidant. This antioxidant does not function for oxygen scavenging in the final product but helps for a longer storing of the second polymer composition prior to using it.

[0015] In the following preferred embodiments of the composition as well as a method of manufacturing the composition are further described, whereby all features can be combined with each other in any manner with each other irrespective whether they are disclosed for the composition or the method and do not limit the method of the present invention.

[0016] According to this invention "at least one" means that the substance or ingredient of the respective composition can comprise one, two, three or more different respective substances. Preferably, "at least one" means that one or two substances, more preferable one substance is present.

[0017] In a preferred embodiment of the composition according to the invention the composition comprises at least 90 weight-%, preferably 95 weight-%, most preferably 97 weight-% of the at least first polymer based on the total weight of the composition.

[0018] In a further preferred embodiment of the composition according to the invention the composition comprises 0.1 to 5 weight-%, preferably 0.3 to 3 weight-%, most preferably 0.5 to 2 weight-% of the second polymer composition based on the total weight of the composition.

[0019] In the following, the first polymer composition will be described in more detail in the following:

[0020] The first polymer composition comprises at least one polyester based on ethylene glycol and terephthalic acid. Such PET compositions are well known in the art. PET polymers include homo polymers and copolymers of polyethylene terephthalate and may be modified with one or more poly carboxylic acid modifiers and hydroxyl compound modifiers which are collectively known as PET. Furthermore, the first polymer composition according to the invention comprises at least one metal compound. According to the invention the metal compound which is in the first polymer composition has no function in the first polymer composition itself. However, it will function as an oxidation catalyst for the sacrificial polymer which is in the second polymer composition according to the invention.

[0021] Furthermore, the composition according to the invention has in this first polymer composition at least one first polymerization catalyst, preferably having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions. This polymerization catalyst is used to polymerize ethylene glycol and terephthalic acid to the polymer according to the invention which is PET.

[0022] In another preferred embodiment of the composition according to the invention, the first polymer composition comprises furthermore at least one copolymer, which is based on a carboxylic acid. Suitable copolymers for PET are well known in the art. In particular, phthalic acid, iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid are preferred carboxylic acids as copolymers in this preferred embodiment of the invention.

[0023] In another preferred embodiment of the invention the first polymer composition comprises iso-phthalic acid which has a concentration from 1 to 15 weight-%, preferably 2 to 8 weight-%, most preferably 4 to 6 weight-% based on the total weight of the terephthalic acid which is used in the polyester base composition in the first polymer composition.

[0024] In another preferred embodiment of the invention, the first polymer composition according to the invention may comprise at least one compound based on phosphor preferably a phosphoric acid (PA), which may be present in a preferred embodiment as poly phosphoric acid (PPA). The phosphoric acid may be present in the concentration of 3 to 50 ppm based on the total weight of the first polymer composition. In another preferred embodiment according to the invention the PPA may be present in 10 to 30 ppm, or 15 to 20 ppm based on the total weight of the first polymer composition according to the invention. The amount of the phosphor containing compound, such as (poly) phosphoric acid, may be also described as the concentration of the element phosphor in the first polymer composition in the preferred embodiment according to the invention. The element phosphor may be present between 0,3 to 16 ppm, 3 to 10 ppm, 5 to 7 ppm based on the total weight of the first polymer composition.

[0025] The at least one first polymerization catalyst in the first polymer composition according to the invention may be a typical polymerization catalyst which includes a compound based on antimony, titanium, germanium, tin, aluminium and zinc or mixtures thereof in an amount ranging from 0.1 to 1000 ppm based on the weight of the resulting polyester polymer.

[0026] In a preferred embodiment the at least one first polymerization catalyst added to the first polymer according to the invention are known polymerization catalysts. Preferably a transition metal, metalloid or metal based catalyst may be used as first polymerization catalyst. The cationic part of said catalyst is preferably selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, zirconium, antimony, tin, germanium, aluminium, manganese or mixtures thereof with the counterions selected from the group consisting of oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates or mixtures thereof. In a preferred embodiment the counterion is 2-ethyl-hexanoate or glycolate. It should be mentioned that any combination of transition metal / metalloid / metal and counterion is possible as transition metal, metalloid or metal-based catalyst and mixtures of said compounds are also possible according to another preferred embodiment of the present invention.

[0027] In a preferred embodiment, the first polymerization catalyst may be an antimony- based polymerization catalyst. Suitable antimony-based catalysts include antimony (III) and antimony (V) compounds recognized in the art, in particular organic soluble antimony (III) and antimony (V) compounds with antimony three being most common to use. Other suitable compounds include those antimony compounds that react with, but are not necessarily soluble in dioles, with examples of such compounds including antimony(III) oxide. Specific examples of suitable antimony catalysts include antimony(III) oxide, antimony(III) acetate, antimony(III) glycolates, antimony(III) ethylene glycosides, and mixtures of two or more thereof, with antimony(III) glycolate being preferred. It should be mentioned that the mentioned organic ligands may be used also with other metal compounds listed above. This is obvious for the skilled artisan and not mentioned explicitly here. The preferred amount of antimony catalyst at the composition in the preferred embodiment of the first polymer composition according to the invention, is in a range of 200 ppm to 700 ppm antimony catalysts preferably 300 ppm to 600 ppm, most preferably 400 ppm to 500 ppm concentration of antimony catalyst based on the total weight of the first polymer composition according to the invention.

[0028] In a further preferred embodiment of the invention the first polymer composition according to the composition according to the invention, may further comprise at least one organic colorant. Since the blend according to the invention needs a metal catalyst to provide suitable oxidizing scavenging functions, the color of the PET may be not suitable for mimicking glass. In order to achieve an appropriate color from the base color of the catalyst, depending on the area of application, organic colorants can therefore also be used so that the bottle is accepted by the end-user as a high-quality glass substitute. In particular, organic colorants which are suitable for coloring thermoplastics such as PET are used, such as dyes with anthrachinone groups, perinones, chinophthalones, polycyclic dyes, and others. Preferably the colorants are selected from Solvent blue 45, Solvaperm blue 2B, Macrolex Red 5B, Solvaperm green G, Solvaperm Yellow 2G, Macrolex green G, Solvaperm red 2G, Solvaperm red GG, Solvaperm Violet RSB, Polysynthren Yellow GG, Polysynthren brown R, and mixtures thereof. However not all colorants are suitable for the preferred embodiment according to the invention. It should be mentioned that colorants may poison the polymerization catalyst and / or oxygen scavenging function of the composition according to the invention. It should be mentioned that the red colorants according to a preferred embodiment of the invention is used in an amount from 0.05 weight-% to 2 weight-% based on the total weight of the first polymer composition. Other colorants may be present in an amount from 0.1 ppm to 5 ppm, preferably 0.5 ppm to 2 ppm based on the total weight of the first polymer composition, which do not disturb the oxygen scavenging function. Surprisingly it was found out that some colorants mentioned above lead to an excellent color, which mimics glass, without inhibiting the oxygen scavenging properties of the composition according to a preferred embodiment of the invention, while other dyes are unsuitable. The composition of the colorant is key for the right color and the oxygen scavenging function, which may be a result of an undesired side reaction of colorants with the polymer, thereby cancelling the oxygen scavenging function. Additionally, the desired color and oxygen scavenging function were present independently of the wall thickness. Thus, in a preferred embodiment, the present invention enables for the first time to obtain a PET material which is in terms of transparency and clarity comparable to glass - independent of the thickness of the material when used as packaging material.

[0029] According to the invention the first polymer composition further comprises at least one metal or metalloid compound suitable for scavenging oxygen in the final composition, having preferably oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions. In a preferred embodiment of the composition according to the invention, the metal compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese, germanium, antimony, tin and / or aluminium with a counterion, which preferably is a carboxylic acid, more preferably selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and ethyl hexonate. In a preferred embodiment the metal of the metal compound suitable for scavenging oxygen in the final composition is a d-element and preferably selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc and / or manganese. It should be mentioned that any combination of metal and ligand is possible as metal compounds and mixtures of said compounds are also possible according to another preferred embodiment of the invention. In a further preferred embodiment according to the invention the metal compound is selected from at least one cobalt species. In particular cobalt (II) compounds or mixtures thereof are preferred, more preferably the compound is cobalt (II) stearate. As already described above the metal compound has no function in the first polymer by itself. It functions rather as an oxidation catalyst for the sacrificial polymer which will be described later in the second polymer according to the invention. In any case, the at least one metal compound may be present in an amount of 20 to 200 ppm, preferably 40 to 150 ppm, most preferably 60 to 100 ppm based on the total mass of the first polymer composition.

[0030] It is further to be noted that according to the present invention, the metal compound added for oxygen scavenging is different from the first and second polymerization catalysts. The metal compound according to the present invention is not designed to catalyse polymerization reactions and is also not able to do so. This is also true the other way round: neither the first nor the second polymerization catalyst are able to scavenge oxygen in the final PET composition. Thus, in a preferred embodiment, the metal in the metal compound and the metal of the polymerization catalysts are different from each other.

[0031] In the following, the at least one second polymer composition according to the composition in this invention will be described in more detail:

[0032] According to the invention the at least one second polymer composition comprises:

[0033] (a) at least one polymer based on tetra hydrofuran, and

[0034] (b) at least one second polymerization catalyst.

[0035] In the composition according to this invention, the at least one second polymer comprises at least one polymer based on tetra hydrofuran. Polymers based on tetrahydrofuran are commonly known as poly tetra hydrofuran or abbreviated as PTMEG. The material is a mixture of polyether diols terminated with alcohol groups. It is produced by polymerization of tetrahydrofuran as well as 1,4-butanediol.

[0036] According to the invention the at least one second polymer composition comprises furthermore at least one second polymerization catalyst. The second polymerization catalyst can be the selected from the same compounds as the first polymerization catalysts defined above. It is therefore referred to the explanations of the first polymerization catalyst. Within the present invention, the first and second polymerization catalyst can be the same or different. In one preferred embodiment, they are the same. In another preferred embodiment, they are different from each other. In a preferred embodiment, the second polymerization catalyst is based on titanates or zirconates, which are preferably selected as the metal in as the at least one second polymerization catalyst. More preferably said second polymerization catalyst is a titanium-based catalyst, such as tetra-2-ethylhexyl titanate.

[0037] In a preferred embodiment, the composition according to this invention comprises additionally at least one antioxidant in the second polymer composition. The antioxidant may be selected from the group of phenols or compounds with an oxidizable group, such as enols. Phenols according to this invention consist of at least one aromatic unit which comprises at least one hydroxyl group. Enols or compounds with an oxidizable group according to this invention, which are suitable as antioxidants, such as ascorbic acid may also be used as antioxidants according to the invention. Other suitable compounds are amines, phosphites or sulfur-based antioxidants. Additionally, the aromatic units of the phenol may be connected by alkyl chains, either branched or linear, or any other carbon chain unit, such as alkylene. The phenols, which are selected as antioxidant in the preferred embodiment, may contain at least one branched alkyl-group, such as isopropyl or butyl, which is preferably a butyl group. Antioxidants preferred in this invention are tocopherol, butylhydroxyanisole or butylhydroxytoluene or 1,3,5-trimethyl, 2,4,6- tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene or mixtures of two or more thereof. The antioxidants may be present in an amount of 0.1 ppm to 200 ppm preferably 10 ppm to 100 ppm most preferably 20 ppm to 60 ppm based on the total weight of the second polymer composition.

[0038] In a further preferred embodiment of the composition according to this invention the composition is substantially free of 3-hexenedionic acid. As used herein the term "substantially free of 3-hexenedionic acid" refers to base polymers, based on PET or PTMEG, including less than about 1000 ppm of the acid preferably less than about 500 ppm of the acid and more preferably less than about 100 ppm and most preferably from about 2 ppm to 50 ppm of said acid based on the total weight of the composition according to the invention. In a further embodiment according to the invention the at least first polymer and / or the at least second polymer may be derived from recycled polymers or materials. Depending on the used recycled polymer materials for the composition according to the invention, the oxygen scavenging function may be delayed. This allows the manufactured packaging material to be stored without losing its scavenging function. By this means, the packaging material manufactured with the polymer composition according to the invention will not lose its oxygen scavenging function, when it is not directly used to store the corresponding products.

[0039] Furthermore, the composition according to this invention may be used as material in the manufacture of food or drink packaging materials. Accordingly, packaging made from the polyester composition according to the invention, as well as methods for making such packaging and, in particular, blow-molded articles such as bottles containing the polyester composition according to the invention, are encompassed by the present invention.

[0040] A container or packing material made of the composition according to this invention may provide a substantially extended oxygen barrier function compared to other polyester packaging materials. In particular, a packaging material or container manufactured with the composition according to the invention will maintain or even lower the oxygen amount in said container for up to 4 years, preferably up to 3 years, more preferably up to 2 years. This time frame is dependent on factors such as the geometry of the manufactures packaging material, the wall thickness and the food or beverage stored in the packaging material. For instance, a liquid will generally contain a higher level of oxygen by its nature than a solid product, since oxygen may dissolve in it depending on the manufacturing of the liquid.

[0041] The composition according to the invention which is used as a packaging material has certain advantages of plastics or thermoplastics such as PET and glass bottles. By the composition according to the invention it is possible to mimic glass bottles even with a low wall thickness or with very high wall thickness. The thickness is determined at the wall of the bottle (bottle belly), not in the area of the closure of the bottle, such as the thread. Preferred wall thicknesses of packaging materials manufactured with the composition according to the present invention are from 10 to 10000 mikrometers, more preferable from 20 to 7500 mikrometers, most preferably 30 to 6500 mikrometers. Especially for thicker bottles, it is difficult to mimic a glass like appearance with PET bottles. With the present invention, it was in a preferred embodiment for the first time possible to add suitable colorants and oxygen scavenging material in one compound without disturbing the function of each other.

[0042] However, when it comes to mimic high quality glass bottles, such as (sparkling) wine bottles, thicker wall thicknesses may be used in another preferred embodiment of the packaging material manufactured with the composition according to the invention. Such wall thicknesses are from 100 to 5000 mikrometers, preferably 300 to 2000 mikrometers, most preferable 500 to 1000 mikrometers.

[0043] Another important aspect of a packaging material manufactured by the composition according to the invention is that they are refillable since they have a low stress cracking, even after caustic wash cycles. The refilling process includes several rinsing procedures, which may cause problems with oxygen scavenging of this is due to an additional layer, as this layer may be damaged also during this rinsing thereby reducing the oxygen scavenging capability of the PET material. Packaging materials manufactured with the composition according to the invention have a dense crystal structure, therefore being more unsolvable in those rinsing processes. As a consequence, the packaging material is designed to be used at least 25 times.

[0044] The composition according to the invention may be manufactured by following the steps described underneath:

[0045] (i) the at least one first polymer composition is provided

[0046] (ii) the at least one second polymer composition is provided and

[0047] (iii) the at least first and the second polymer composition are mixed together to derive at the composition according to the invention,

[0048] (iv) processing the composition resulting in (iii) in an injection moulding machine. According to the method of the present invention, the second polymer composition is not dried prior to providing it in step (ii), whereas the first polymer composition is in another preferred embodiment dried prior to being provided in step (i).

[0049] Injection moulding is well known in the art, which involves melting and extruding the composition. Subsequently, the formed article may be further processed in stretch blow moulding to form a bottle.

[0050] Thus, the present invention allows for the first time a ready to use composition, which enables the production of clear and transparent packing material. It allows to produce bottles mimicking glass. And there is only the need to have a first and a second polymer composition, which can be stored separately from each other. There is only the need to blend these two compositions with each other, as the present invention allows for the first time to have oxygen scavenging, colorants or other additives, where needed, in one of the first or second polymer composition. This allows for a fast and easy production, which was not possible in the prior art. Further, additives, such as hindered amine light stabilizers as for example discloses in WO 2015 / 095782 are not needed. In a preferred embodiment, the composition of the present invention is therefore substantially free of hindered amine light stabilizers. "Substantially free" means in this context that the composition in the preferred embodiment has less than 5%, preferably 1%, most preferably 0.5% by weight hindered amine light stabilizers based on the total weight of the composition according to the invention. Also specific polyester-polyether copolymers are not needed to obtain the oxygen scavenging properties according to the present invention. Instead, that the oxygen scavenging properties result from the combination of a metal compound in the first polymer composition and providing a polymer based on tetrahydrofuran. These two components are essential for the properties of the inventive composition. They are provided separately from each other and will be mixed with each other prior to use, i.e. prior of forming a product from the compound.

[0051] The present invention will be further explained by the following examples, without limiting the invention to these examples. Examples

[0052] In the subsequent tables exemplary compositions according to the invention are provided.

[0053] Table 1 : First exemplary composition according to this invention

[0054] Relation of Polymer 1 : Polymer 2 = 98:2

[0055] Table 2: Second exemplary composition according to this invention

[0056] Relation of Polymer 1 : Polymer 2 = 98,5: 1,5

[0057] Table 3: Third exemplary composition according to this invention

[0058] Relation of Polymer 1 : Polymer 2 = 98:2

[0059] The compositions 1 (first polymer composition) and 2 (second polymer composition) of the above table 1 to 3 were mixed with each other and bottles were prepared by injection molding. The bottles were clear and transparent and had a glass like appearance.

[0060] The present invention may thus be defined by the following items and preferred items:

[0061] 1. A composition, comprising

[0062] (a) at least one first polymer composition comprising:

[0063] (i) at least one polyester based on ethylene glycol and terephthalic acid,

[0064] (ii) at least one metal compound suitable for scavenging oxygen in the composition, and

[0065] (iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and

[0066] (b) at least one second polymer compositions comprising:

[0067] (i) at least one polymer based on tetra hydrofuran, and

[0068] (ii) at least one second polymerization catalyst.

[0069] 2. The composition according to item 1, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition.

[0070] 3. The composition according to item 1 or 2, wherein the composition comprises at least 95 weight % of the at least one first polymer composition based on the total weight of the composition.

[0071] 4. The composition according to any of items 1 to 3, wherein the composition comprises at least 97 weight % of the at least one first polymer composition based on the total weight of the composition.

[0072] 5. The composition according to any of items 1 to 4, wherein the composition comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition.

[0073] 6. The composition according to an of items 1 to 5, wherein the composition comprises 0.3-3 weight % of the at least one second polymer composition based on the total weight of the composition. 7. The composition according to any of items 1 to 6, wherein the composition comprises 0.5-2 weight % of the at least one second polymer composition based on the total weight of the composition.

[0074] 8. The composition according to any of items 1 to 7, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

[0075] 9. The composition according to item 8, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

[0076] 10. The composition according to any of items 1 to 9, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

[0077] 11. The composition according to any of items 1 to 10, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

[0078] 12. The composition according to item 11, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

[0079] 13. The composition according to any of items 1 to 12, wherein the at least one first polymer further comprises at least one organic colorant.

[0080] 14. The composition according to any of items 1 to 13, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palmi- nate, and 2-ethyl hexanoate.

[0081] 15. The composition according to any of items 1 to 14, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

[0082] 16. The composition according to any of items 1 to 15, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert- butyl-4-hydroxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

[0083] 17. A container comprising a polyethylene terephthalate (PET) composition, comprising:

[0084] (a) at least one first polymer composition comprising:

[0085] (i) at least one polyester based on ethylene glycol and terephthalic acid,

[0086] (ii) at least one metal compound suitable for scavenging oxygen in the composition, and

[0087] (iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and

[0088] (b) at least one second polymer compositions comprising:

[0089] (i) at least one polymer based on tetra hydrofuran, and

[0090] (ii) at least one second polymerization catalyst.

[0091] 18. The container according to item 17, wherein the container is a bottle.

[0092] 19. The container according to item 17 or 18, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition, and comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition. 20. The container according to any of items 17 to 19, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

[0093] 21. The container according to item 20, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

[0094] 22. The container according to any of items 17 to 21, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

[0095] 23. The container according to any of items 17 to 22, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

[0096] 24. The container according to item 23, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

[0097] 25. The container according to any of items 17 to 24, wherein the at least one first polymer further comprises at least one organic colorant.

[0098] 26. The container according to any of items 17 to 25, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palmi- nate, and 2-ethyl hexanoate. 27. The container according to any of items 17 to 26, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

[0099] 28. The container according to any of items 17 to 27, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert- butyl-4-hydroxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

[0100] 29. A packaging material, comprising:

[0101] (a) at least one first polymer composition comprising:

[0102] (i) at least one polyester based on ethylene glycol and terephthalic acid,

[0103] (ii) at least one metal compound suitable for scavenging oxygen in the composition, and

[0104] (iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and

[0105] (b) at least one second polymer compositions comprising:

[0106] (i) at least one polymer based on tetra hydrofuran, and

[0107] (ii) at least one second polymerization catalyst, the thickness of the packaging material is from 10 pm to 10000 .m.

[0108] 30. The packaging material according to item 29, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition.

[0109] 31. The packaging material according to item 29 or 30, wherein the composition comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition

[0110] 32. The packaging material according to any of items 29 to 31, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid. 33. The packaging material according to item 32, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarbox- ylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

[0111] 34. The packaging material according to any of items 29 to 33, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

[0112] 35. The packaging material according to any of items 29 to 34, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

[0113] 36. The packaging material according to item 35, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

[0114] 37. The packaging material according to any of items 29 to 36, wherein the at least one first polymer further comprises at least one organic colorant.

[0115] 38. The packaging material according to any of items 29 to 37, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and 2-ethyl hexanoate.

[0116] 39. The packaging material according to any of items 29 to 38, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition. 40. The packaging material according to any of items 29 to 39, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

[0117] 41. A method of manufacturing a polyethylene terephthalate (PET) composition, comprising:

[0118] (i) providing the at least one first polymer composition, comprising:

[0119] (a) at least one polyester based on ethylene glycol and terephthalic acid,

[0120] (b) at least one metal compound suitable for scavenging oxygen in the composition, and

[0121] (c) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions,

[0122] (ii) providing the at least one second polymer composition, comprising:

[0123] (a) at least one polymer based on tetra hydrofuran, and

[0124] (b) at least one second polymerization catalyst.

[0125] (iii) mixing the at least one first polymer composition and the at least one second polymer composition to derive the polyethylene terephthalate (PET) composition; and

[0126] (iv) processing the polyethylene terephthalate (PET) composition resulting in (iii) in an injection molding machine.

[0127] 42. The method of manufacturing a polyethylene terephthalate (PET) composition according to item 41, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition, and comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition. 43. The method of manufacturing a polyethylene terephthalate (PET) composition according to item 41 or 42, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

[0128] 44. The method of manufacturing a polyethylene terephthalate (PET) composition according to item 43, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3- cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

[0129] 45. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 44, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

[0130] 46. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 45, wherein the at least one first polymer further comprises a compound containing phosphor.

[0131] 47. The method of manufacturing a polyethylene terephthalate (PET) composition according to item 46, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

[0132] 48. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 47, wherein the at least one first polymer further comprises at least one organic colorant.

[0133] 49. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 48, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tanta- lum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and 2-ethyl hexanoate.

[0134] 50. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 49, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

[0135] 51. The method of manufacturing a polyethylene terephthalate (PET) composition according to any of items 41 to 50, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hy- droxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

Claims

CLAIMS1. A composition, comprising(a) at least one first polymer composition comprising:(i) at least one polyester based on ethylene glycol and terephthalic acid,(ii) at least one metal compound suitable for scavenging oxygen in the composition, and(iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and(b) at least one second polymer compositions comprising:(i) at least one polymer based on tetra hydrofuran, and(ii) at least one second polymerization catalyst.

2. The composition according to claim 1, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition.

3. The composition according to claim 1, wherein the composition comprises at least 95 weight % of the at least one first polymer composition based on the total weight of the composition.

4. The composition according to claim 1, wherein the composition comprises at least 97 weight % of the at least one first polymer composition based on the total weight of the composition.

5. The composition according to claim 1, wherein the composition comprises 0.1- 5 weight % of the at least one second polymer composition based on the total weight of the composition.

6. The composition according to claim 1, wherein the composition comprises 0.3-3 weight % of the at least one second polymer composition based on the total weight of the composition.

7. The composition according to claim 1, wherein the composition comprises 0.5-2 weight % of the at least one second polymer composition based on the total weight of the composition.

8. The composition according to claim 1, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

9. The composition according to claim 8, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

10. The composition according to claim 1, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

11. The composition according to claim 1, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

12. The composition according to claim 11, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

13. The composition according to claim 1, wherein the at least one first polymer further comprises at least one organic colorant.

14. The composition according to claim 1, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate,naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and 2-ethyl hexanoate.

15. The composition according to claim 1, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

16. The composition according to claim 1, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkylgroup, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-bu- tyl -4- hydroxy benzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

17. A container comprising a polyethylene terephthalate (PET) composition, comprising:(a) at least one first polymer composition comprising:(i) at least one polyester based on ethylene glycol and terephthalic acid,(ii) at least one metal compound suitable for scavenging oxygen in the composition, and(iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and(b) at least one second polymer compositions comprising:(i) at least one polymer based on tetra hydrofuran, and(ii) at least one second polymerization catalyst.

18. The container according to claim 17, wherein the container is a bottle.

19. The container according to claim 17, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition, and comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition.

20. The container according to claim 17, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

21. The container according to claim 20, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

22. The container according to claim 17, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

23. The container according to claim 17, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

24. The container according to claim 23, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

25. The container according to claim 17, wherein the at least one first polymer further comprises at least one organic colorant.

26. The container according to claim 17, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and2-ethyl hexanoate.

27. The container according to claim 17, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

28. The container according to claim 17, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hy- droxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

29. A packaging material, comprising:(a) at least one first polymer composition comprising:(i) at least one polyester based on ethylene glycol and terephthalic acid,(ii) at least one metal compound suitable for scavenging oxygen in the composition, and(iii) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions, and(b) at least one second polymer compositions comprising:(i) at least one polymer based on tetra hydrofuran, and(ii) at least one second polymerization catalyst, the thickness of the packaging material is from 10 pm to 10000 .m.

30. The packaging material according to claim 29, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition.

31. The packaging material according to claim 29, wherein the composition comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition32. The packaging material according to claim 29, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

33. The packaging material according to claim 32, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohex- ane dicarboxylic acid, 1,3-cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicar- boxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

34. The packaging material according to claim 29, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

35. The packaging material according to claim 29, wherein the at least one first polymer further comprises a compound containing phosphor, preferably a phosphoric acid, most preferably polyphosphoric acid.

36. The packaging material according to claim 35, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

37. The packaging material according to claim 29, wherein the at least one first polymer further comprises at least one organic colorant.

38. The packaging material according to claim 29, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from the group consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palmi- nate, and 2-ethyl hexanoate.

39. The packaging material according to claim 29, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

40. The packaging material according to claim 29, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert- butyl-4-hydroxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

41. A method of manufacturing a polyethylene terephthalate (PET) composition, comprising:(i) providing the at least one first polymer composition, comprising:(a) at least one polyester based on ethylene glycol and terephthalic acid,(b) at least one metal compound suitable for scavenging oxygen in the composition, and(c) at least one first polymerization catalyst having oxides, carbonates, chlorides, dioxides, hydroxides, nitrates, phosphates, sulphates, silicates, carboxylic acids and mixtures thereof as counterions,(ii) providing the at least one second polymer composition, comprising:(a) at least one polymer based on tetra hydrofuran, and(b) at least one second polymerization catalyst.(iii) mixing the at least one first polymer composition and the at least one second polymer composition to derive the polyethylene terephthalate (PET) composition; and(iv) processing the polyethylene terephthalate (PET) composition resulting in (iii) in an injection molding machine.

42. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the composition comprises at least 90 weight % of the at least one first polymer composition based on the total weight of the composition, and comprises 0.1-5 weight % of the at least one second polymer composition based on the total weight of the composition.

43. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the first polymer further comprises at least one copolymer, based on a carboxylic acid.

44. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 43, wherein the at least one copolymer is selected from the group consisting of iso-phthalic acid, 1,4-cyclohexane dicarboxylic acid, 1,3- cyclohexane dicarboxylic acid, succinic acid, adipic acid, glutaric acid, sebacic acid, 1,12-dodecanedioic acid, and 2,6-naphthalene-dicarboxylic acid, wherein the at least one copolymer preferably is present in a concentration from 1-15 weight-%, preferably 2-8 weight-%, most preferably 4-6 weight% based on the total weight of the terephthalic acid in (i).

45. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the at least one second polymer further comprises at least one polyester based on ethylene glycol and terephthalic acid.

46. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the at least one first polymer further comprises a compound containing phosphor.

47. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 46, wherein a concentration of the element phosphor is between 0.3 to 16 ppm.

48. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the at least one first polymer further comprises at least one organic colorant.

49. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the metal of the at least one metal or metalloid compound is selected from the group consisting of cobalt, copper, rhodium, ruthenium, palladium, tungsten, osmium, cadmium, silver, tantalum, hafnium, vanadium, titanium, chromium, nickel, zinc, manganese germanium, antimony, tin, aluminium, and the counterion, which is a carboxylic acid, is selected from thegroup consisting of neodecanoate, octanoate, stearate, acetate, naphthalate, lactate, maleate, acetylacetonate, linoleate, oleate, palminate, and 2-ethyl hexanoate.

50. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the at least one metal compound is present in an amount of 20-200 ppm based on the total mass of the first polymer composition.

51. The method of manufacturing a polyethylene terephthalate (PET) composition according to claim 41, wherein the at least second polymer composition comprises at least one antioxidant, which is selected from the group of phenols, preferably phenols containing at least one branched alkyl-group, most preferably selected from l,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tocopherol, butylhydroxyanisole or butylhydroxytoluene or mixtures thereof.

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