DE202019103147U1 - Molded part and crosslinkable composition for forming the molded part - Google Patents

Abstract

Molded part (20) with a wall made of a molded part layer (22) which consists of a crosslinked polymer material or at least partially contains one, the crosslinked polymer material of the molded part layer (22) being formed by crosslinking a crosslinkable polymeric composition (1) by this is exposed to an energy suitable for crosslinking, the crosslinkable polymeric composition comprising (1)
- At least one crosslinkable polyolefin (2), in particular a polyethylene,
- at least one initiator (3),
- At least one stabilizer (4), which is homogeneously mixed with a mixing unit to form the crosslinkable polymeric composition (1), and this is shaped with a molding tool to give a shaped crosslinkable polymeric composition (10) in such a way that a wall of the shaped crosslinkable polymeric composition (10) is formed from the layer (11), after which the shaped crosslinkable polymeric composition (10) is exposed to an energy suitable for crosslinking, whereby the shaped crosslinkable polymeric composition (10) forms the molded part (20) with the crosslinked polymer material.

Description

Crosslinking of polyethylene can be done in a number of ways. In addition to crosslinking with the aid of peroxides, crosslinking using UV initiators, e.g. based on substituted benzophenones known as another method.

The formation of the crosslinkable polymer material and its crosslinking take place approximately at the same time.

This is often a disadvantage if, for example, it is a question of the shaped crosslinkable polymer material being temporarily stored for various reasons, or that further work processes have to be carried out on it before the crosslinking takes place.

It is therefore an object of the present invention to provide a molded part which is formed by molding and crosslinking a crosslinkable polymeric composition, the disadvantages of the prior art described above being overcome.

The object of the present invention is achieved by the features of claim 1.

• - wenigstens ein vernetzbares Polyolefin, insbesondere ein Polyethylen,
• - wenigstens einen Initiator, und
• - wenigstens einen Stabilisator,

welche mit einem Mischaggregat zu der vernetzbaren polymeren Zusammensetzungen homogen vermischt ist, und diese mit einem Formwerkzeug zu einer geformten vernetzbaren polymeren Zusammensetzung derart geformt ist, dass eine Wandung der geformten vernetzbaren polymeren Zusammensetzung aus der Schicht gebildet ist, wonach die geformte vernetzbare polymere Zusammensetzung einer zur Vernetzung geeigneten Energie ausgesetzt ist, wodurch die geformte vernetzbare polymere Zusammensetzung das Formteil mit dem vernetzten Polymermaterial bildet, die gestellte Aufgabe vollumfänglich löst.It was surprisingly found within the scope of the present invention that a molded part with a wall of a molded part layer which consists of a crosslinked polymer material or at least partially contains such a material, the crosslinked polymer material of the molded part layer being formed by crosslinking a crosslinkable polymeric composition by this exposed to an energy suitable for crosslinking, wherein the crosslinkable polymeric composition comprises

• - At least one crosslinkable polyolefin, in particular a polyethylene,
• - at least one initiator, and
• - at least one stabilizer,

which is homogeneously mixed with a mixing unit to form the crosslinkable polymeric composition, and this is shaped with a molding tool to form a shaped crosslinkable polymeric composition in such a way that a wall of the shaped crosslinkable polymeric composition is formed from the layer, after which the shaped crosslinkable polymeric composition is a Crosslinking is exposed to suitable energy, as a result of which the shaped crosslinkable polymeric composition forms the molded part with the crosslinked polymer material, completely solving the problem.

By means of the inventive measure of providing a molded part layer which is formed from a crosslinkable polymeric composition which contains an initiator, and the use of energy suitable for crosslinking, the energy suitable for crosslinking, for example, in the event that the initiator is selected from a peroxide , Heat, or that the energy suitable for crosslinking, for example in the case that the initiator is selected from a UV photoinitiator, is UV radiation in order to bring about crosslinking of the crosslinkable polymeric composition, uniform crosslinking of the entire layer can be achieved .

This makes it possible to achieve complete crosslinking or crosslinking of the crosslinkable polymeric composition in accordance with the requirements of the customers or in accordance with the relevant specifications.

In the context of the present invention, a degree of crosslinking of the crosslinked polymer material can prove to be extremely favorable DIN EN ISO 10147 of> 60%, in particular> 70%.

This provides molded parts that are extremely resistant and pressure-resistant and meet the requirements of customers or the requirements of the relevant specifications for their application.

In the context of the present invention, it can be found to be very advantageous if it is provided that the molded part is formed with the aid of a molding tool for molding the crosslinkable polymeric composition into the shaped crosslinkable composition, the molding tool being an injection molding tool and / or a blow molding tool and / or is a deep-drawing tool and / or a pressing tool.

By choosing a molding tool for molding the crosslinkable polymeric composition to form the molded crosslinkable composition, the molding tool being an injection molding tool and / or a blow molding tool and / or a deep-drawing tool and / or a pressing tool, a molded part can be produced precisely according to customer specifications in a simple, cheaper and be produced in series.

In the context of the present invention, it can furthermore prove to be very practicable if it is provided that the molded part is manufactured in an additive manufacturing process, such as a 3D printing process.
Such a process is suitable for producing a molded part according to the present invention in large numbers in a reproducible, dimensionally stable and inexpensive manner.

In particular, it can be provided that the molded part is manufactured entirely or partially using a generative manufacturing process, for example by a 3-D printing process.
For this purpose, a data processing machine-readable three-dimensional model can advantageously be used for the production.
The invention also comprises a method for generating a data processing machine-readable three-dimensional model for use in a manufacturing method for a molded part. In this case, the method also includes, in particular, the input of data representing a molded part into a data processing machine and the use of the data to display a molded part as a three-dimensional model, the three-dimensional model being suitable for use in the production of a molded part. The method also includes a technique in which the inputted data of one or more 3D scanners, which function either on contact or without contact, in which case energy is emitted onto a molded part and the reflected energy is received, and in which a virtual three-dimensional Model of a molded part is generated using computer-aided design software.
The manufacturing process can be a generative powder bed process, in particular selective laser melting (SLM), selective laser sintering (SLS), selective heat sintering (SHS), selective electron beam melting (electron beam melting - EBM / Electron Beam Additive Manufacturing - EBAM) or solidification of powder material by means of binder (binder jetting). The manufacturing process can be a generative free space process, in particular build-up welding, wax deposition modeling (WDM), contour crafting, metal powder application process (MPA), plastic powder application process, cold gas spraying, electron beam melting (Electron Beam Welding - EBW) or melt coating processes such as fused deposition Modeling (FDM) or Fused Filament Fabrication (FFF). The manufacturing method can include a generative liquid material method, in particular stereolithography (SLA), digital light processing (DLP), multi jet modeling (MJM), polyjet modeling or liquid composite molding (LCM). Furthermore, the manufacturing method can include other generative layer construction methods, in particular laminated object modeling (LOM), 3D screen printing or light-controlled electrophoretic deposition.

The energy suitable for crosslinking can be, for example, in the case that the initiator is selected from a peroxide, heat, or the energy suitable for crosslinking, for example in the case that the initiator is selected from a UV photoinitiator, be UV radiation.

• Dialkylperoxide: Dicumylperoxid, Di(t-butyl)-peroxid, Di(t-amyl)-peroxid, 2,5-Di(t-butyl)peroxy-2,5-dimetly-3-hexin, a,a-Bis(t-butylperoxy)-diisopropylbenzol (das verschiedene Isomere aufweisen kann), t-Butylcumyl-peroxid, 2,5-Di(t-butylperoxy)-2,5-dimethylhexan;
• Diacylperoxide: Benzoylperoxid, Decanoylperoxid, Laurylperoxid, Bernsteinsäureperoxid; Diperoxyketale: 1,1-Di(t-butylperoxy)-3,3,5-trimethylcyclohexan, 1,1-Di(t-butylperoxy)-cyclohexan, 1,1-Di(t-amylperoxy)-cyclohexan, n-Butyl-4,4-di(t-butylperoxy)valerat, Ethyl-3,3-di-(t-amylperoxy)butanoat, Ethyl-3,3-di(t-butylperoxy)butyrat, eine Zusammensetzung von 40 % 1,1-Di(t-butylperoxy)-cyclohexan und 25 % t-Butyl-peroxy-2-ethylhexanoat;
• Hydroperoxide: Cumenhydroperoxid, t-Butylhydroperoxid;
• Ketonperoxide: Methyl-ethyl-keton-peroxide, 2,4-Pentandion-peroxide, eine Zusammensetzung aus Methyl-ethyl-keton-peroxid und Cumenhydroperoxid;
• Peroxydicarbonate: Di(t-propyl)peroxydicarbonat, Di(sec-butyl)peroxydicarbonat, Di(2-ethylhexyl)peroxyd icarbonate;
• Di-Cumylperoxid (1,1'-(dioxydipropane-2,2-diyl)dibenzene, CAS 80-43-3) Di-tert-Butylperoxid (CAS 80-43-3),
• 2,5-Dimethyl-2,5-di(tert-butylperoxy)-hexan (z.B. Trigonox 101, CAS 78-63-7), 2,5-Dimethyl-2,5-di(tert-butylperoxy)-hexin-3 (z.B. Trigonox 145-E85, CAS 1068-27-5), 3,6,9-Triethyl-3,6,9-trimethyl-1,2,4,5,7,8-hexoxonan (z.B. Trigonox 301, CAS 24748-23-0), 3,3,5,7,7-Pentamethyl-1,2,4-trioxepan (z.B. Trigonox 311, CAS 215877-64-8).

Suitable initiators according to the present invention are as initiators which, under the influence of heat, start and drive crosslinking based on thermally activated free radicals by forming free radicals:

• Dialkyl peroxides: dicumyl peroxide, di (t-butyl) peroxide, di (t-amyl) peroxide, 2,5-di (t-butyl) peroxy-2,5-dimetly-3-hexyne, a, a-bis ( t-butylperoxy) diisopropylbenzene (which can have various isomers), t-butylcumyl peroxide, 2,5-di (t-butylperoxy) -2,5-dimethylhexane;
• Diacyl peroxides: benzoyl peroxide, decanoyl peroxide, lauryl peroxide, succinic acid peroxide; Diperoxyketals: 1,1-di (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-di (t-butylperoxy) -cyclohexane, 1,1-di (t-amylperoxy) -cyclohexane, n-butyl -4,4-di (t-butylperoxy) valerate, ethyl 3,3-di- (t-amylperoxy) butanoate, ethyl 3,3-di (t-butylperoxy) butyrate, a composition of 40% 1.1 -Di (t-butylperoxy) -cyclohexane and 25% t-butyl-peroxy-2-ethylhexanoate;
• Hydroperoxides: cumene hydroperoxide, t-butyl hydroperoxide;
• Ketone peroxides: methyl ethyl ketone peroxide, 2,4-pentanedione peroxide, a composition of methyl ethyl ketone peroxide and cumene hydroperoxide;
• Peroxydicarbonates: di (t-propyl) peroxydicarbonate, di (sec-butyl) peroxydicarbonate, di (2-ethylhexyl) peroxydicarbonate;
• Di-cumyl peroxide (1,1 '- (dioxydipropane-2,2-diyl) dibenzene, CAS 80-43-3) di-tert-butyl peroxide (CAS 80-43-3),
• 2,5-dimethyl-2,5-di (tert-butylperoxy) -hexane (e.g. Trigonox 101, CAS 78-63-7), 2,5-dimethyl-2,5-di (tert-butylperoxy) -hexyne- 3 (e.g. Trigonox 145-E85, CAS 1068-27-5), 3,6,9-triethyl-3,6,9-trimethyl-1,2,4,5,7,8-hexoxonane (e.g. Trigonox 301, CAS 24748-23-0), 3,3,5,7,7-pentamethyl-1,2,4-trioxepane (e.g. Trigonox 311, CAS 215877-64-8).

A content of initiator which starts the crosslinking under the influence of heat due to thermally activated free radicals of 0.05 to 2.0% by weight can prove to be useful.

In the present invention it can be found to be very advantageous if, in another embodiment, it is provided that a layer is formed from a crosslinkable polymeric composition which contains a photoinitiator and with UV radiation with a wavelength range of 200 to 450 nm (nanometers) can be crosslinked.
This layer forms the wall of the molded part.

In a favorable embodiment of the present invention it can be provided that an Hg vapor lamp without doping with an energy output of 150 to 330 W / cm, in particular an energy output of 240 W / cm, is used to provide the UV radiation.

To optimize the UV radiation used for crosslinking, it can be provided that the Hg vapor lamp is doped with iron or gallium in order to shift or close maxima in the spectrum of UV radiation in a wavelength range from 240 to 450 nm position.

In the case of UV crosslinking, provision can be made in particular that the use of an IR filter is dispensed with when using the Hg vapor lamp in order to use the waste heat from the Hg vapor lamp in the wavelength range of> 600 nm (nanometers) to control the temperature of the polymer composition to be able to. This increases the mobility of the macromolecules in the composition in such a way that faster crosslinking is possible.

In an alternative embodiment of the invention it can also be provided that UV-LED systems or UV lasers are used as UV radiation sources.
Ideally, systems with an output of 80 W / cm and more are used for this purpose.

With a radiation source that ideally provides 6/7 of its power in the UV range in the wavelength range from 250 to 450 nm (nanometers), the radical decomposition of the photoinitiator is triggered, which starts the crosslinking of the polyethylene.

• Benzophenon und dessen Derivate, diese umfassen Monomere, oligomere oder polymere Benzophenone mit Substitution in 4 bzw. 4, 4' Position, sowie unsubstituiertes Benzophenon. Insbesondere sind zur Vernetzung geeignet 4-Chlorobenzophenon (CAS 134-85-0) und 4-Methylbenzophenon (CAS 134-84-9).

The following can advantageously be used as photoinitiators for the crosslinkable polymeric composition of the layer:

• Benzophenone and its derivatives, these include monomers, oligomeric or polymeric benzophenones with substitution in the 4 or 4, 4 'position, and unsubstituted benzophenone. 4-chlorobenzophenone (CAS 134-85-0) and 4-methylbenzophenone (CAS 134-84-9) are particularly suitable for crosslinking.

• Phenylphosphinoxid (z.B. Omnirad 819, CAS 162881-26-7),
• Ketocoumarin (z.B. Esacure 3644, CAS nicht bekannt),
• Phenylphospinat (z.B. Omnipol TP, CAS nicht bekannt),
• Acetophenon (z.B. Irgacure 651 / Omnirad BDK, CAS 24650-42-8),
• Cyclohexyl-phenyl-keton (z.B. Omnirad 184, CAS 947-19-3),
• Chlorendic Anhydride (1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dicarboxylic anhydride, CAS 115-27-5), und
• Sandoray 1000 (2,2-Dichlor-1-(4-phenoxyphenyl)ethan-1-on, CAS 59867-68-4).

The following can also be used:

• Phenylphosphine oxide (e.g. Omnirad 819, CAS 162881-26-7),
• Ketocoumarin (e.g. Esacure 3644, CAS not known),
• Phenylphospinate (e.g. Omnipol TP, CAS not known),
• Acetophenone (e.g. Irgacure 651 / Omnirad BDK, CAS 24650-42-8),
• Cyclohexyl-phenyl-ketone (e.g. Omnirad 184, CAS 947-19-3),
• Chlorendic anhydride (1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dicarboxylic anhydride, CAS 115-27-5), and
• Sandoray 1000 (2,2-dichloro-1- (4-phenoxyphenyl) ethan-1-one, CAS 59867-68-4).

A photoinitiator content of 0.5 to 3.0% by weight in the crosslinkable polymeric composition can prove to be favorable.

The degree of crosslinking can be set through the exposure time, for example in a period of 2 to 30 seconds, preferably 10 seconds, and through the concentration of the photoinitiator, which is 0.2 to 5.0% by weight, preferably 0.5 to 3 , 0 wt .-%.

The kinetics of the crosslinking reaction can be controlled via the duration of the exposure time, the distance to the radiation source and via the receptive composition.

A polyethylene that is preferably in the form of granules can be used as the polyethylene.

The polyethylene can be used on the basis of HD-PE (high density polyethylene) with a density between 0.920 and 0.970 g / cm ³ , preferably with a density of 0.965 g / cm ³ . The polyethylene can have a melt flow index (MFI according to DIN EN ISO 1133 ) from 9 to 50 g / 10 min at 190 ° C / 21.6 kg, a melt flow index of 42 g / 10 min being preferred.

The selection of the crosslinkable polyolefin in the crosslinkable polymeric composition as defined above means that many different polyethylenes can be used for this crosslinking technique. In particular, standard types can now also be used for networking. This means that a broad base of raw materials can be used, which accordingly simplifies the production of cross-linked polyethylene and also makes it more cost-effective.

The molded crosslinkable polymeric composition based on polyethylene, preferably one HD-PE in granular form can be crosslinked at a substrate temperature between 90 ° C. and 160 ° C., preferably at a substrate temperature of at least 140 ° C., the substrate temperature being above the crystallite melting point of the HD-PE.

Due to the temperature, the formed crosslinkable polymeric composition is ideally in an optically translucent or at least partially optically translucent state, the depth of penetration of the UV radiation used for crosslinking reaching its maximum. The networking process takes place without pressure.

The shaped crosslinkable polymeric composition is fed to the crosslinking process in a dimensionally stable state and heated during crosslinking to a temperature range above the crystallite melting point of the HD-PE, whereby the optical transparency is so high that the UV radiation penetrates the layer from the high crosslinkable polymeric composition is present.

In a very favorable further development, the present invention can provide that the stabilizer is selected from a HALS (Hindered Amine Light Stabilizer) and / or a phenolic antioxidant.

The crosslinkable polymeric composition can also include one or more antioxidants along with one or more HALS. Antioxidants are used to protect the crosslinkable polymeric composition during the production process, for example when the composition is exposed to elevated temperature and pressure during the production process. This can prevent polyethylene from suffering a loss of mechanical properties due to oxidative degradation.

An antioxidant is also helpful in maintaining the quality of a molded part over a long period of time, especially when the molded part is exposed to chlorine or other oxidative agents. For example, in the case of a molded part that contains a fluid with chlorine or oxidative agents and that may be subject to oxidative degradation over long periods of time, the polymer material of the molded part can be protected by the use of an antioxidant, thus preserving its mechanical properties will.

The content of antioxidant in the crosslinkable polymeric composition can be 0.03 to 0.6% by weight.

Octadecyl 3- (3-5-di-tert-butyl-4-hydroxyphenyl) propionate (Irganox 1076) can in particular be used as an antioxidant.

• Phenolische Antioxidans

Other antioxidants of the present invention include:

• Phenolic antioxidant

Examples include alkylated monophenols such as 2,6-di-tert-butyl-4-ethylphenol; 2,6-di-tert-butyl-4-n-butylphenol; 2,6-di-tert-butyl-4-isobutylphenol; 2,6-dicyclopentyl-4-methylphenol; 2- (methylcyclohexyl) -4,6-dimethylphenol); 2,6-dioctadecyl-4-methylphenol; 2,4,6-tricyclohexylphenol; 2,6-di-tert-butyl-4-methoxymiethylphenol;

Hydroquinones and alkylated hydroquinones such as 2,6-di-tert-butyl-4-methoxyphenol; 2,5-di-tert-butylhydroquinone; 2,5-di-tert-amylhydroquinone; 2,6-diphenyl-4-octadecyloxyphenol; 2,6-di-tert-butyl hydroquinone; 2,5-di-tert-butyl-4-hydroxyanisole; 3,5-di-tert-butyl-4-hydroxyanisole; 3,5-di-tert-butyl 1-4-hydroxyphenyl stearate; Bis (3,5-di-tert-butyte-4-hydroxyphenyl) adipate;

Tocopherols such as alpha tocopherol; Beta tocopherol; Gamma tocopherol; Delta tocopherol and mixtures thereof (vitamin E);

Hydroxylated thiodiphenyl ethers such as 2,2'-thiobis (6-tert-butyl-4-methylphenol); 2,2'-thiobis (4-octylphenol); 4,4'-thiobis (6-tert-butyl-3-methylphenol); 4,4'-thiobis (6-tert-butyl-2-methylphenol); 4,4'-thiobis (3,6-di-sec-amylphenol), 4,4'-bis (2,6-dimethyl-4-hydroxyphenyl) disulfide;

Alkylidenebisphenols such as 2.2'-methylenebis (6-tert-butyl-4-methylphenol); 2,2'-methylenebis (6-tert-butyl-4-ethylphenol); 2,2'-methylenebis [4-methyl-6- (alpha-methylcyclohexyl) phenol]; 2,2'-methylenebis (4-methyl-6-cyclohexylphenol); 2,2'-methylenebis (4,6-di-tert-butylphenol); 2,2'-ethylidenebis (4,6-di-tert-butylphenol); 2,2'-ethylidenebis (6-tert-butyl-4-isobutyl-phenol); 4,4'-methylenebis (2,6-di-tert-butylphenol); 4,4'-methylenebis (6-tert-butyl-2-methylphenol); 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane; 2,6-bis (3-tert-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol; 1,1,3-tris (5-tert-butyl-4-hydroxy-2-methylphenyl) butane; 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) -3-n-dodecyl mercaptobutane; Ethylene glycol bis [3,3-bis (3'-tert-butyl-4'-hydroxyphenyl) butyrate]; Bis (3-tert-butyl-4-hydroxy-5-methyl-phenyl) dicyclopentadiene; Bis [2- (3'-tert-butyl-2'-hydroxy-5'-methylbenzyl) -6-tert-butyl-4-methylphenyl] terephthalate; 1,1-bis (3,5-dimethyl-2-hydroxyphenyl) butane; 2,2-bis (3,5-di-tert-butyl-4-hydroxyphenyl) propane; 2,2-bis- (5-tert-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecyl mercaptobutane; 1,1,5,5-tetra (5-tert-butyl-4-hydroxy-2-methylphenyl) pentane;

O-, N- and S-benzyl compounds such as 3,5,3 ', 5'-tetra-tert-butyl-4,4'-dihydroxydibenzyl ether; Octadecyl-4-hydroxy-3,5-dimethylbenzyl mercaptoacetate; Tridecyl-4-hydroxy-3,5-di-tert- butylbenzyl mercaptoacetate; Tris (3,5-di-tert-butyl-4-hydroxybenzyl) amine; Bis (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) dithioterephthalate; Bis (3,5-di-tert-butyl-4-hydroxybenzyl) sulfide; Isooctyl-3,5-di-tert-butyl-4-hydroxybenzyl mercaptoacetate;

Hydroxybenzylated malonates such as dioctadecyl 2,2-bis (3,5-di-tert-butyl-2-hydroxybenzyl) malonate; Di-octadecyl 2- (3-tert-butyl-4-hydroxy-5-methylbenzyl) malonate; Di-dodecyl mercaptoethyl 2,2-bis (3,5-di-tert-butyl-4-hydroxybenzyl) malonate; Bis [4- (1,1,3,3-tetramethylbutyl) phenyl] -2,2-bis (3,5-di-tert-butyl-4-hydroxybenzyl) malonate;

Hydroxybenzyl aromatic compounds such as 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -2,4,6-trimethylbenzene; 1,4-bis (3,5-di-tert-butyl-4-hydroxybenzyl) -2,3,5,6-tetramethylbenzene; 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) phenol;

Triazine compounds such as 2,4-bis (octylmercapto) -6- (3,5-di-tert-butyl-4-hydroxyanilino) -1,3,5-triazine; 2-octylmercapto-4,6-bis (3,5-di-tert-butyl-4-hydroxyanilino) -1,3,5-triazine; 2-octylmercapto-4,6-bis (3,5-di-tert-butyl-4-hydroxyphenoxy) -1,3,5-t-triazine; 2,4,6-tris (3,5-di-tert-butyl-4-hydroxyphenoxy) -1,2,3-triazine; 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate; 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate; 2,4,6-tris (3,5-di-tert-butyl-4-hydroxyphenylethyl) -1,3,5-triazine; 1,3,5-tris (3,5-di-tert-butyl-4-hydroxyphenylpropionyl) -hexahydro-1,3,5-triazine; 1,3,5-tris (3,5-dicyclohexyl-4-hydroxybenzyl) isocyanurate;

Benzyl phosphonates such as dimethyl 2,5-di-tert-butyl-4-hydroxybenzyl phosphonate; Diethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate; Dioctadecyl3,5-di-tert-butyl-4-hydroxybenzylphosphonate; Dioctadecyl 5-tert-butyl-4-hydroxy-3-methylbenzylphosphonate; the calcium salt of the monoethyl ester of 3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid;

Acylaminophenols such as 4-hydroxylauranilide; 4-hydroxystearanilide; Octyl N- (3,5-di-tert-butyl-4-hydroxyphenyl) carbamate;

Esters such as those made from (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid with mono- or polyhydric alcohols, such as, for example, methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1 , 9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, Trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo [2.2.2] octane;

Esters such as those from (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid with monohydric or polyhydric alcohols, such as, for example, methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1, 9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, Trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo [2.2.2] octane, 3,9-bis [2- {3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane;

Esters such as those from (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid with monohydric or polyhydric alcohols, such as, for example, methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2- Propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-trimethylolpropane, 4-trimethylhexanediol, trimethylolpropane, 2,6,7-trioxabicyclo [2.2.2] octane;
or esters of 3,5-di-tert-butyl-4-hydroxyphenylacetic acid with monohydric or polyhydric alcohols, such as methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2- Propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-trimethylolpropane, 4-trimethylhexanediol, trimethylolpropane, 2,6,7-trioxabicyclo [2.2.2] octane or mixtures thereof.

HALS are compounds in which one amine group is sterically hindered by adjacent functional groups. In some embodiments, the physical properties of structural polymers such as PE tend to degrade over time when exposed to ultraviolet (UV) wavelengths of light. The use of HALS in the polymer blend interferes with this degradation and makes it easier to maintain the structural polymer properties over time.

The total amount of HALS (eg one or more of the HALS described herein) can be from 0.05 to 0.15% by weight, from 0.05 to 0.2% by weight, from 0.01 to 0.6% by weight .-% or from 0.05 to 0.3 wt .-%. About 0.1% by weight or about 0.15% by weight, based on the total weight of the polymer composition, are preferred.

• N,N'-Bis(2,2,6,6-tetramethyl-piperidin-4-yl)hexane-1,6-diamin (Chimassorb 944 von BASF); 1,5,8,12-Tetrakis[4,6-bis(N-butyl-N-1,2,2,6,6-pentamethyl-4-piperidylamino)-1,3,5-triaxin-2-yl]-1,5,8,12-tetraazadodecan (Chimassorb 119 von BASF);
• Decandisäure-bis(2,2,6,6-tetramethyl-4-piperidyl)-ester (Tinuvin 770 von BASF oder Hostavin N17 von CLARIANT);
• Decandisäure-bis(2,2,6,6-tetramethyl-1-(methyl)-4-piperidyl)-ester (Tinuvin 765 von BASF);
• Decandisäure-bis(2,2,6,6-tetramethyl-1-(octyloxy)-4-piperidyl)-ester (Tinuvin 123 von BASF);
• Butandisäure-dimethylester, dessen Polymer mit 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidine-ethanol (Tinuvin 622 von BASF) oder dessen Polymer von Dimethylsuccinat and 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidin-ethanol (Lowilite 62 von GREAT LAKES POLYMER ADDITIVES);
• 2,2,4,4-Tetramethyl-7-oxa-3,20-diaza-dispiro-[5-1.112]-heneicosan-21-on (Hostavin N20 von CLARIANT);
• eine Mischung von 2,2,4,4-Tetramethyl-20-(beta-myristyl and lauryl-oxycarbonyl)-ethyl-7-oxa-3,20-diaza-dispiro-[5.1.11.2]-heneicosanon-21 (Hostavin N24 von CLARIANT); Polymer von 2,2,4,4-Tetramethyl-7-oxa-3,20-diaza-dispiro-[5.1.11,2]-heneicosan-21-on und Epichlorohydrin (Hostavin N30 von CLARIANT);
• eine Mischung von Hostavin N24 und N30 (Hostavin N321 von CLARIANT); Polymer von 2,2,4,4-Tetramethyl-7-oxa-3,20-diaza-dispiro-[5.1.11.2]-heneicosan-21-on und Epichlorohydrin gemischt mit Säurefängern (Hostavin N391 von CLARIANT); Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-2-(4-methoxy-benzyliden)-malonat (Hostavin PR-31 von CLARIANT);
• 1,3-Benzendicarboxamid-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl) (Nylostab S-EED von CLARIANT);
• 1,6-Hexandiamin-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-Polymere mit 2,4-Dichloro-6-(4-morpholinyl)-1,3,5-triazin-2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy)phenol (Cyasorb THT 4611 von CYTEC);
• 1,6-Hexandiamin-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-Polymer mit Morpholin-2,4,6-trichloro-1,3,5-triazin-Reaktionsprodukten, methyliert 2-[4,6-Bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy)phenol (Cyasorb THT 6435 von CYTEC);
• 1,6-Hexandiamin-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-Polymer mit 2,4-Dichloro-6-(4-morpholinyl)-1,3,5-triazin (Cyasorb UV-3346 von CYTEC);
• 1,6-Hexandiamin-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-Polymere mit Morpholin-2,4,6-trichloro-1,3,5-triazin Reaktionsprodukte, methyliert (Cyasorb UV-3529 von CYTEC); 2,2,6,6-Tetramethyl-4-piperidinyl-stearat (Fettsäuremischung) (Cyasorb UV-3853 von CYTEC);
• Cyasorb UV3853 dispers verteilt in Polypropylen oder LDPE (Cyasorb UV3853PP4 (40% HALS, 60% PP), Cyasorb UV3853PP5 (50% HALS, 50% PP) und Cyasorb UV3853S (50% HALS, 50% LDPE));
• Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]hexamethylen[(2,2,6,6-tetramethyl-4-piperidyl)imino]]
• (Lowilite 94 von LANXESS);
• Butandisäure-bis(2,2,6,6-tetramethyl-4-piperidyl);
• Decandisäure-bis(1,2,2,6,6-pentamethyl-4-piperidyl);
• das Kondensat von 1-(2-Hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidin und Bernsteinsäure;
• lineare oder zyklische Kondensate von N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylendiamin und 4-tert-Octylamino-2,6-dichloro-1,3,5-triazin;
• Tris(2,2,6,6-tetramethyl-4-piperidyl)nitrilotriacetat;
• Tetrakis(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butantetracarboxylat; Bis(1,2,2,6,6-pentamethylpiperidyl)-2-n-butyl-2-(2-hydroxy-3,5-di-tertbutylbenzyl)-malonat; lineare oder zyklische Kondensate von N,N'-Bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene-diamin und 4-Morpholino-2,6-dichloro-1,3,5-triazin;
• das Kondensat von 2-Chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-1,3,5-triazin und 1,2-Bis(3-aminopropylamino)-ethan;
• das Kondensat von 2-Chloro-4,6-di-(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-tri-azin und 1,2-Bis(3-aminopropylamino)ethan;
• 3-Dodecyl-1-(1,2,2,6,6-pentamethyl-4-piperidyl)pirrolidine-2,5-dion;
• eine Mischung von 4-Hexadecyloxy- und 4-Stearyloxy-2,2,6,6-tetramethylpiperdin;
• das Kondensat von N,N'-Bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamin und 4-Cyclohexylamino-2,6-dichloro-1,3,5-triazin;
• das Kondensat von 1,2-Bis(3-aminopropylamino)ethan und 2,4,6-Trichloro-1,3,5-triazin, oder das von 4-Butylamino-2,2,6,6-tetramethylpiperidin (CAS Reg. No. [136504-96-6]);
• das Kondensat von 1,6-Hexandiamin und 2,4,6-Trichloro-1,3,5-triazin oder das von N,N-Dibutylamin und 4-Butylamino-2,2,6,6-tetramethylpiperidin (CAS Reg. No. (192268-64-7]); N-(2,2,6,6-Tetramethyl-4-piperidyl)-n-dodecylsuccinimid;
• N-(1,2,2,6,6-Pentamethyl-4-piperidyl)-n-dodecylsuccinimid;
• N,N'-Bis-formyl-N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylendiamin;
• der Diester von 4-Methoxymethylenmalonsäure mit 1,2,2,6,6-Pentamethyl-4-hydroxypiperidin;
• Poly[methylpropyl-3-oxy-4-(2,2,6,6-tetramethyl-4-piperidyl)]siloxan;
• das Reaktionsprodukt von Maleinsäureanhydrid-alpha-Olefin Copolymer mit 2,2,6,6-Tetramethyl-4-aminopiperidin oder 1,2,2,6,6-Pentamethyl-4-aminopiperidin.

Examples of HALS that are suitable for the polymer composition in the present invention include:

• N, N'-bis (2,2,6,6-tetramethyl-piperidin-4-yl) hexane-1,6-diamine (Chimassorb 944 from BASF); 1,5,8,12-tetrakis [4,6-bis (N-butyl-N-1,2,2,6,6-pentamethyl-4-piperidylamino) -1,3,5-triaxin-2-yl ] -1,5,8,12-tetraazadodecane (Chimassorb 119 from BASF);
• Decanedioic acid bis (2,2,6,6-tetramethyl-4-piperidyl) ester (Tinuvin 770 from BASF or Hostavin N17 from CLARIANT);
• Decanedioic acid bis (2,2,6,6-tetramethyl-1- (methyl) -4-piperidyl) ester (Tinuvin 765 from BASF);
• Decanedioic acid bis (2,2,6,6-tetramethyl-1- (octyloxy) -4-piperidyl) ester (Tinuvin 123 from BASF);
• Dimethyl butanedioate, the polymer of which with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine-ethanol (Tinuvin 622 from BASF) or the polymer of dimethyl succinate and 4-hydroxy-2,2,6,6- tetramethyl-1-piperidine-ethanol (Lowilite 62 from GREAT LAKES POLYMER ADDITIVES);
• 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-dispiro- [5-1,112] -heneicosan-21-one (Hostavin N20 from CLARIANT);
• a mixture of 2,2,4,4-tetramethyl-20- (beta-myristyl and lauryl-oxycarbonyl) -ethyl-7-oxa-3,20-diaza-dispiro- [5.1.11.2] -heneicosanone-21 (Hostavin N24 from CLARIANT); Polymer of 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-dispiro- [5.1.11,2] -heneicosan-21-one and epichlorohydrin (Hostavin N30 from CLARIANT);
• a mixture of Hostavin N24 and N30 (Hostavin N321 from CLARIANT); Polymer of 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-dispiro- [5.1.11.2] -heneicosan-21-one and epichlorohydrin mixed with acid scavengers (Hostavin N391 from CLARIANT); Bis (1,2,2,6,6-pentamethyl-4-piperidinyl) -2- (4-methoxy-benzylidene) malonate (Hostavin PR-31 from CLARIANT);
• 1,3-benzene dicarboxamide-N, N'-bis (2,2,6,6-tetramethyl-4-piperidinyl) (Nylostab S-EED from CLARIANT);
• 1,6-hexanediamine-N, N'-bis (2,2,6,6-tetramethyl-4-piperidinyl) polymers with 2,4-dichloro-6- (4-morpholinyl) -1,3,5- triazine-2- [4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol (Cyasorb THT 4611 from CYTEC);
• 1,6-hexanediamine-N, N'-bis (2,2,6,6-tetramethyl-4-piperidinyl) polymer with morpholine-2,4,6-trichloro-1,3,5-triazine reaction products, methylated 2- [4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol (Cyasorb THT 6435 from CYTEC);
• 1,6-hexanediamine-N, N'-bis (2,2,6,6-tetramethyl-4-piperidinyl) polymer with 2,4-dichloro-6- (4-morpholinyl) -1,3,5- triazine (Cyasorb UV-3346 from CYTEC);
• 1,6-hexanediamine-N, N'-bis (2,2,6,6-tetramethyl-4-piperidinyl) polymers with morpholine-2,4,6-trichloro-1,3,5-triazine reaction products, methylated (Cyasorb UV-3529 from CYTEC); 2,2,6,6-tetramethyl-4-piperidinyl stearate (fatty acid mixture) (Cyasorb UV-3853 from CYTEC);
• Cyasorb UV3853 dispersed in polypropylene or LDPE (Cyasorb UV3853PP4 (40% HALS, 60% PP), Cyasorb UV3853PP5 (50% HALS, 50% PP) and Cyasorb UV3853S (50% HALS, 50% LDPE));
• Poly [[6 - [(1,1,3,3-tetramethylbutyl) amino] -1,3,5-triazine-2,4-diyl] [(2,2,6,6-tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]]
• (Lowilite 94 from LANXESS);
• Butanedioic acid bis (2,2,6,6-tetramethyl-4-piperidyl);
• Decanedioic acid bis (1,2,2,6,6-pentamethyl-4-piperidyl);
• the condensate of 1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid;
• linear or cyclic condensates of N, N'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine;
• Tris (2,2,6,6-tetramethyl-4-piperidyl) nitrilotriacetate;
• Tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate; Bis (1,2,2,6,6-pentamethylpiperidyl) -2-n-butyl-2- (2-hydroxy-3,5-di-tert-butylbenzyl) malonate; linear or cyclic condensates of N, N'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylene-diamine and 4-morpholino-2,6-dichloro-1,3,5-triazine;
• the condensate of 2-chloro-4,6-bis (4-n-butylamino-2,2,6,6-tetramethylpiperidyl) -1,3,5-triazine and 1,2-bis (3-aminopropylamino) ethane ;
• the condensate of 2-chloro-4,6-di- (4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl) -1,3,5-tri-azine and 1,2-bis (3 -aminopropylamino) ethane;
• 3-dodecyl-1- (1,2,2,6,6-pentamethyl-4-piperidyl) pirrolidine-2,5-dione;
• a mixture of 4-hexadecyloxy and 4-stearyloxy-2,2,6,6-tetramethylpiperdine;
• the condensate of N, N'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine;
• the condensate of 1,2-bis (3-aminopropylamino) ethane and 2,4,6-trichloro-1,3,5-triazine, or that of 4-butylamino-2,2,6,6-tetramethylpiperidine (CAS Reg No. [136504-96-6]);
• the condensate of 1,6-hexanediamine and 2,4,6-trichloro-1,3,5-triazine or that of N, N-dibutylamine and 4-butylamino-2,2,6,6-tetramethylpiperidine (CAS Reg. No. (192268-64-7]); N- (2,2,6,6-tetramethyl-4-piperidyl) -n-dodecylsuccinimide;
• N- (1,2,2,6,6-pentamethyl-4-piperidyl) -n-dodecyl succinimide;
• N, N'-bis-formyl-N, N'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine;
• the diester of 4-methoxymethylene malonic acid with 1,2,2,6,6-pentamethyl-4-hydroxypiperidine;
• Poly [methylpropyl-3-oxy-4- (2,2,6,6-tetramethyl-4-piperidyl)] siloxane;
• the reaction product of maleic anhydride-alpha-olefin copolymer with 2,2,6,6-tetramethyl-4-aminopiperidine or 1,2,2,6,6-pentamethyl-4-aminopiperidine.

Finally, it should be noted that any combination of the aforementioned HALS can be used in the crosslinkable polymeric composition.

In a further development of the present invention, it can prove to be very helpful if it is provided that additives are contained in the crosslinkable polymeric composition, selected from fillers, lubricants, flow aids, antistatic agents, pigments, processing aids, polymers and the like.

By providing that the crosslinkable polymeric composition of the present invention contains additives according to the above list, the crosslinkable polymeric composition can be precisely adjusted to the respective technical needs and specifications of the customer.

It can further be provided that a crosslinking enhancer is selected from a triallyl cyanurate (TAC) and / or a triallyl isocyanurate (TAIC) and / or from polybutadiene which is added to the crosslinkable polymeric composition.

• - wenigstens ein vernetzbares Polyolefin, insbesondere ein Polyethylen,
• - wenigstens einen Initiator,
• - und wenigstens einen Stabilisator.

The crosslinkable polymeric composition of the present invention comprises

• - At least one crosslinkable polyolefin, in particular a polyethylene,
• - at least one initiator,
• - and at least one stabilizer.

It can be found to be extremely favorable if it is provided that the crosslinkable polymeric composition comprises
94 to 99.45% by weight of a crosslinkable polyolefin, in particular a polyethylene, 0.05 to 3.0% by weight of initiator,
and 0.5 to 3.0% by weight of stabilizer,
the sum of the components listed above of the crosslinkable polymeric composition being 100% by weight.

The further object of the invention to provide a crosslinkable polymeric composition for forming a crosslinked polymer material for the molded part is achieved by the subject matter of claim 6.

In the context of the present invention it was recognized that the crosslinkable polymeric composition according to the above description is suitable for producing the molded part of the present invention therefrom in a simple, reproducible and inexpensive manner, the advantages described above resulting and the deficiencies of the known prior art being eliminated .

The present invention makes it possible to provide a molded part - as described above - which in a crosslinking process by a simple process has a high degree of crosslinking, in particular a degree of crosslinking required by the customer or specification, without the molded part being undesirably stressed and possibly damaged in the process has been.

The invention also includes a method for producing a molded part.

• - wenigstens ein vernetzbares Polyolefin, insbesondere ein Polyethylen,
• - wenigstens einen Initiator,
• - wenigstens einen Stabilisator,

welche mit einem Mischaggregat zu der vernetzbaren polymeren Zusammensetzung homogen vermischt werden, und diese mit einem Formwerkzeug zu einer geformten vernetzbaren polymeren Zusammensetzung derart geformt wird, dass die Formteilschicht der Wandung des Formteils aus der Schicht gebildet wird, wonach die geformte vernetzbare polymere Zusammensetzung einer zur Vernetzung geeigneten Energie ausgesetzt wird, wodurch die geformte vernetzbare polymere Zusammensetzung das Formteil mit dem vernetzten Polymermaterial bildet.In the method according to the present invention, a molded part with a wall of at least one molded part layer, which consists of a crosslinked polymer material or at least partially contains such a material, is produced in that the crosslinked polymer material of the molded part layer is formed by crosslinking a crosslinkable polymeric composition exposed to an energy suitable for crosslinking, the crosslinkable polymeric composition comprising

• - At least one crosslinkable polyolefin, in particular a polyethylene,
• - at least one initiator,
• - at least one stabilizer,

which are mixed homogeneously with a mixing unit to form the crosslinkable polymeric composition, and this is shaped with a molding tool to form a shaped crosslinkable polymeric composition in such a way that the molded part layer the wall of the molded part is formed from the layer, after which the molded crosslinkable polymeric composition is exposed to an energy suitable for crosslinking, whereby the molded crosslinkable polymeric composition forms the molded part with the crosslinked polymer material.

According to the present invention, the crosslinking process with appropriate stabilization, for which, for example, antioxidants can be used, can be optimized so that it can be compared with currently known, purely thermoplastic processing processes with a high output rate.

The crosslinking can be started in a targeted manner by the action of heat and / or by irradiation with UV light. The desired degree of crosslinking of> 70% can thus be achieved easily and homogeneously.

The crosslinking process can be started immediately or at a later point in time, in particular only after days, weeks or months, by the action of energy suitable for crosslinking on the formed crosslinkable polymeric composition. It goes without saying that, in the case of prolonged storage for days, weeks or months, the shaped crosslinkable polymeric composition must be protected from soiling and undesired effects.

Advantageously, the shaped crosslinkable polymeric composition can also be redesigned in its shape prior to the crosslinking process, if the customer so desires.

Likewise, the shaped crosslinkable polymeric composition can also be reshaped if this is necessary for any reason.

Likewise, a defective production of parts from the shaped crosslinkable polymeric composition can be reshaped and this material can be reused in the still uncrosslinked state, which saves costs.

The present invention is widely used in the crosslinking of crosslinkable polymer materials in order to produce molded parts or containers or strips or components or covers and other items that are particularly resistant and inert.

In particular, molded parts for receiving, storing and conveying fluids, such as water and gases, are easily and inexpensively accessible in this way.

Further important features and advantages of the invention emerge from the subclaims, from the figure and from the associated description of the figures.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination, but also in other combinations or alone, without departing from the scope of the present invention.

The present invention is described in more detail with reference to the attached figure.

• 1: eine schematische Darstellung der vernetzbaren polymeren Zusammensetzungen, deren Formung und des Vernetzungsprozesses zu einem Formteil mit einer Wandung, die vernetztes Polymermaterial aufweist.

This shows:

• 1 : a schematic representation of the crosslinkable polymeric compositions, their shaping and the crosslinking process to form a molded part with a wall that has crosslinked polymer material.

In 1 is a schematic representation of the crosslinkable polymeric composition 1 shaping them into a shaped crosslinkable polymeric composition 10 and the crosslinking process with the action of energy suitable for crosslinking to form the molded part 20th shown.

The crosslinkable polymeric composition 1 is in the 1 shown on the left as an oval, which should symbolize that the crosslinkable polymeric composition 1 is unshaped.

• ein vernetzbares Polyolefin 2,
• einen Initiator 3,
• einen Stabilisator 4, beispielsweise in Form eines Thermo- und / oder Lichtstabilisators.

The crosslinkable polymeric composition 1 includes:

• a crosslinkable polyolefin 2 ,
• an initiator 3 ,
• a stabilizer 4th , for example in the form of a thermal and / or light stabilizer.

In the crosslinkable polymeric composition 1 is a crosslinkable polyolefin 2 Contain polyethylene.

The above components 2 , 3 , and 4th the crosslinkable polymeric composition 1 are mixed together homogeneously.
This homogeneous mixing of the components 2 , 3 , and 4th the crosslinkable polymeric composition 1 takes place with the help of a mixing unit or in a device for mixing the components 2 , 3 , and 4th .

From the crosslinkable polymeric composition 1 is a shaped crosslinkable polymer with the help of a mold composition 10 , which is presently formed as a part having a C-shaped cross section schematically illustrated in a cross-sectional view.
The molded crosslinkable polymeric composition 10 , which is formed as a part with a C-shaped cross section, has a layer 11 based on the crosslinkable polymeric composition 1 is formed.

The layer 11 forms the C-shaped cross-section part from the molded crosslinkable polymeric composition 10 .

By applying energy suitable for crosslinking to the shaped crosslinkable polymeric composition 10 the crosslinking process is started and advanced in this, from the crosslinkable polymeric composition 1 the crosslinked polymer material is formed.

The crosslinking process can take place immediately or at a later point in time, in particular only after days, weeks or months, by the action of energy suitable for crosslinking on the shaped crosslinkable polymeric composition 10 be started.
It goes without saying that upon prolonged storage for days, weeks or months, the shaped crosslinkable polymeric composition 10 to protect against dirt and undesirable effects.

Advantageously, the shaped crosslinkable polymeric composition 10 their form can be redesigned before the networking process, if the customer so wishes. Likewise, the molded crosslinkable polymeric composition 10 can also be reshaped if this is necessary.

The molded part is created through the networking 20th , its molded part layer 22nd through networking from the layer 12 the shaped crosslinkable polymeric composition 10 originated.
The molding layer 22nd of the molded part 20th now exists or contains crosslinked polymer material.

By acting on the crosslinkable polymeric composition with the energy suitable for crosslinking 1 the shift 11 a final crosslinking is effected in which the degree of crosslinking already mentioned above is reached.

It is understood that those in the 1 Layer thickness of the molded part layer shown 22nd is only shown schematically symbolized and has nothing to do with a layer thickness chosen in reality.

The present invention can be developed further in a broad scope by adding further layers to the molding layer 22nd and / or on the outer surface of the molded part layer 22nd and / or on the inner surface of the molded part layer 22nd are provided. Such further layers can include protective layers, diffusion barrier or diffusion reducing layers, marking layers, abrasion protection layers, chemical protection layers, weather protection layers and others.

The present invention has been described in detail with reference to the embodiment of the present invention shown in the figure. It goes without saying that the present invention is not limited to the embodiment shown, but that the scope of the present invention results from the claims.

List of reference symbols

1

crosslinkable polymeric composition

2

Polyolefin

3

Photoinitiator

4th

stabilizer

10

shaped crosslinkable polymeric composition

11

layer

20th

Molding

21st

Wall

22nd

Molding layer

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Non-patent literature cited

• DIN EN ISO 10147 [0009]
• DIN EN ISO 1133 [0030]

Claims (8)

Molded part (20) with a wall made of a molded part layer (22) which consists of a crosslinked polymer material or at least partially contains one, the crosslinked polymer material of the molded part layer (22) being formed by crosslinking a crosslinkable polymeric composition (1) by this is exposed to an energy suitable for crosslinking, the crosslinkable polymeric composition comprising (1) - At least one crosslinkable polyolefin (2), in particular a polyethylene, - at least one initiator (3), - At least one stabilizer (4), which is homogeneously mixed with a mixing unit to form the crosslinkable polymeric composition (1), and this is shaped with a molding tool to give a shaped crosslinkable polymeric composition (10) in such a way that a wall of the shaped crosslinkable polymeric composition (10) is formed from the layer (11), after which the shaped crosslinkable polymeric composition (10) is exposed to an energy suitable for crosslinking, whereby the shaped crosslinkable polymeric composition (10) forms the molded part (20) with the crosslinked polymer material. Molded part (20) after Claim 1 , characterized in that the degree of crosslinking of the crosslinked polymer material according to DIN EN ISO 10147 is> 60%, in particular> 70%. Molded part (20) after Claim 1 or 2 , characterized in that the mold for shaping the crosslinkable polymeric composition (1) into the shaped crosslinkable composition (10) is an injection molding tool and / or a blow molding tool and / or a deep-drawing tool and / or a pressing tool and / or a XXXXXX. Molding (20) according to one of the preceding claims, characterized in that the energy suitable for crosslinking is heat and / or UV radiation, the UV radiation having a wavelength range of 200 to 450 nm (nanometers). Molding (20) according to one of the preceding claims, which is designed as a container or as a strip or as a structural element or as a cover. Crosslinkable polymeric composition (1) for forming a crosslinked polymer material for a molded part (20) according to one of the Claims 1 to 5 , characterized in that the initiator (3) is a photoinitiator which in the crosslinkable polymeric composition (1) contains 0.2 to 5.0% by weight, preferably 0.5 to 3.0% by weight or that the initiator (3) is an initiator which forms free radicals under the action of heat, which in the crosslinkable polymeric composition (1) is 0.05 to 2.0% by weight, preferably 0.5 to 1.5% by weight .-% is included. Crosslinkable polymeric composition (1) according to Claim 6 , characterized in that the crosslinkable polyolefin (2) is selected from an HD-PE with a density between 0.920 and 0.970 g / cm ³ , preferably with a density of 0.965 g / cm ³ , and that the photoinitiator (3) is an acetophenone or a cyclohexyl phenyl ketone or a benzophenone, in particular a substituted derivative of benzophenone, preferably a benzophenone substituted in the 4- or 4, 4'-position, particularly preferably a 4-chlorobenzophenone or a 4-methylbenzophenone, or phenylphosphine oxide, or Ketocoumarin, or phenylphospinate, or acetophenone, or cyclohexylphenyl ketone, or 1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic anhydride, or 2,2-dichloro-1 - (4-phenoxyphenyl) ethan-1-one is. Crosslinkable polymeric composition (1) according to one of the Claims 6 or 7th , characterized in that the stabilizer (4) is selected from a HALS (Hindered Amine Light Stabilizer) and / or a phenolic antioxidant.

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