EP4662277A1 - Gefässverschluss mit dichtungselement - Google Patents
Gefässverschluss mit dichtungselementInfo
- Publication number
- EP4662277A1 EP4662277A1 EP23704088.6A EP23704088A EP4662277A1 EP 4662277 A1 EP4662277 A1 EP 4662277A1 EP 23704088 A EP23704088 A EP 23704088A EP 4662277 A1 EP4662277 A1 EP 4662277A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer composition
- vessel
- closure according
- butene
- copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Definitions
- the invention relates to a sealing element made of a polymer composition in a vessel closure, wherein the sealing element comprises or consists of a polymer compound which contains at least one butene copolymer. More specifically, the sealing element does not comprise PVC.
- Such sealing elements are known, for example, from WO 2020/021348.
- EP 2 631 721 and EP 3 302 918 disclose seals that comprise butene copolymers. However, these seals can apparently only be produced with special formulations that comprise both very specific butene copolymers and very specific polypropylene-based copolymers.
- An object of the invention is to provide a polymer composition based on butene copolymers which can be used as a sealing element in a vessel closure, which can be produced with commercially available materials at acceptable costs and has very low migration values.
- the sealing element or the vessel closure comprising it is equipped with the feature combinations of the independent patent claims.
- Advantageous embodiments of the invention are defined in the dependent patent claims.
- seals which comprise at least one butene copolymer with a melting temperature above 130°C.
- vessel closures can also be produced with butene copolymers whose melting point is above 130°C, which also makes a majority of commercially available butene copolymers available for such seals.
- the butene of the butene copolymer is preferably a 1-butene.
- a comonomer of the butene copolymer can be propylene, so that the butene copolymer is a butene-propylene copolymer.
- the butene copolymer can be a bipolymer, so that the butene copolymer has exactly one other comonomer, e.g. propylene, in addition to butene.
- the butene copolymer can have a proportion of between 0.1 wt.% and 80 wt.%.
- the butene copolymer can also be present in the polymer composition in a proportion of between 5 wt.% and 60 wt.%.
- the proportion of the butene copolymer is between 8 wt.% and 55 wt.% in the polymer composition.
- Weight percentages with respect to the polymer composition refer to the proportion of the respective component relative to the total weight of all components in the polymer composition.
- the polymer composition may comprise another butene copolymer. This other butene copolymer is a different type of polymer than the butene copolymer already described.
- the butene copolymer already described and the other butene copolymer in the polymer composition may differ in their physical properties (e.g. density, melting temperature, hardness, etc.).
- the butene copolymers may also differ in their structure (block copolymer, random copolymer, etc.).
- Butene copolymers can also differ in the type of their comonomers (ethylene, propylene, etc.).
- the butene in the further butene copolymer may be a 1-butene.
- Ethylene may be a comonomer of the further butene copolymer.
- the copolymerized butene content of the further butene copolymer can be at least 60 mol%, in particular at least 80 mol%.
- the additional butene copolymer can be a butene bipolymer, so that the butene bipolymer has exactly one other type of comonomer in addition to the butene.
- the additional butene copolymer can be present in the polymer composition in a proportion of between 10% by weight and 80% by weight.
- the additional butene copolymer is present in the polymer composition in a proportion of between 22% by weight and 70% by weight.
- the polymer composition contains between 40% by weight and 65% by weight of the additional butene copolymer, based on the total weight of the polymer composition.
- the polymer composition may comprise a polyethylene.
- the polyethylene can be a homo-polyethylene.
- the homo-polyethylene can be an LDPE (low density polyethylene) or an HDPE (high density polyethylene).
- the polyethylene may comprise between 5% and 60% by weight of the polymer composition.
- the proportion of polyethylene in the polymer composition is between 10% and 45% by weight.
- the polyethylene is contained between 15 wt.% and 25 wt.% in the polymer composition.
- the polymer composition may comprise a random propylene copolymer.
- the random propylene copolymer may contain ethylene as a comonomer.
- the random propylene copolymer is a bipolymer.
- the polymer composition contains a random propylene-ethylene copolymer.
- the random propylene copolymer can be present in the polymer composition in an amount between 5% and 60% by weight. Specifically, the proportion of the random propylene copolymer is between 10% and 45% by weight. Particularly preferably, the proportion of the random propylene copolymer is between 15% and 35% by weight in the polymer composition.
- the polymer composition may also comprise a butene homopolymer, specifically present between 5% and 35% by weight in the polymer composition.
- the butene of the butene homopolymer is specifically a 1-butene.
- the butene homopolymer is present in the polymer composition between 10 wt.% and 45 wt.%.
- the proportion of the butene homopolymer in the polymer composition is between 15 wt.% and 35 wt.%.
- the polymer composition may also comprise a copolymer, preferably wherein styrene is a comonomer of the copolymer.
- the copolymer comprising styrene as a comonomer is an SBS, SEPS, SEEPS or SEBS.
- the copolymer comprising styrene as a comonomer is an SEBS.
- the styrene-containing copolymer can be present in the polymer composition in an amount between 10% and 70% by weight. Preferably, the proportion of the styrene-containing copolymer is between 20% and 60% by weight in the Polymer composition.
- the styrene-containing copolymer may also be present in the polymer composition at between 35% and 55% by weight.
- the butene copolymer in particular the butene-propylene copolymer, can be present in the polymer composition in a proportion of at least 80% by weight.
- the butene copolymer can also be present in the polymer composition in a proportion of at least 90% by weight.
- the butene copolymer, in particular the butene-propylene copolymer can be the only polymeric component of the polymer composition and the polymer composition can contain only additives in addition to the butene copolymer.
- the polymer composition preferably comprises a maximum of 10% by weight of a component that is liquid at 20 °C and 1000 hPa.
- the polymer composition comprises a maximum of 5% by weight of such a component.
- Polymer composition does not contain any such component (within the scope of the analytical possibilities on the filing date).
- the polymer composition can be a polyolefin composition. Accordingly, the polymer composition comprises only polyolefins as polymeric components. Additives can be included in the polymer composition, even if they are not polyolefins and the polymer composition is a polyolefin composition.
- the polymer composition does not contain PVC (polyvinyl chloride).
- the polymer composition does not contain an oxygen scavenger.
- the polymer composition can be designed such that it has a static friction coefficient of maximum 0.50, preferably maximum 0.40.
- Friction coefficient is determined according to DIN EN ISO 8295. The friction coefficient is adjusted by adding common additives. A low coefficient of friction is often difficult to achieve, especially when the proportion of components that are liquid at 20°C and 1000 hPa is small.
- the polymer composition typically comprises additives.
- the polymer composition comprises a maximum of 15% by weight of additives.
- the polymer composition comprises a maximum of 8% by weight of additives.
- a maximum of 6% by weight of additives is contained in the polymer composition.
- Additives used can be selected from the group: pigments, nucleating agents, brighteners, stabilizers, surfactants, lubricants, antioxidants or combinations thereof.
- the polymer composition may comprise between 43 wt.% and 57 wt.% of the butene copolymer and between 43 wt.% and 57 wt.% of the additional butene copolymer.
- the polymer composition comprises between 8 wt% and 16 wt% of the butene copolymer, between 55 wt% and 65 wt% of the further butene copolymer and between 18 wt% and 30 wt% of the homopolyethylene (in particular LDPE or HDPE).
- the homopolyethylene in particular LDPE or HDPE
- the polymer composition comprises between 8 wt.% and 16 wt.% of the butene copolymer, between 55 wt.% and 65 wt.% of the further butene copolymer and between 18 wt.% and 30 wt.% of the random propylene copolymer.
- the polymer composition comprises between 8 wt.% and 16 wt.% of the butene copolymer, between 55 wt.% and 65 wt.% of the other butene copolymer, and between 18 wt.% and 30 wt.% of the butene homopolymer.
- the polymer composition may comprise between 8 wt.% and 16 wt.% of the butene copolymer, between 55 wt.% and 65 wt.% of the further butene copolymer, between 3 wt.% and 12 wt.% of the homopolyethylene (in particular LDPE) and between 10 wt.% and 22 wt.% of the random propylene copolymer.
- the vessel closure can be a vacuum screw closure.
- the vessel closure is a cam-twist closure.
- the vessel closure can also be a press-on twist-off vessel closure or a composite closure.
- the polymer composition has an oxygen permeability rate of less than 500 cm3 m 2 d 1 bar 1 at 1 mm film thickness and 23°C, determined according to DIN 53380.
- a low oxygen permeability rate of the polymer composition results in less oxygen entering a vessel that is closed with one of the described vessel closures. This can ensure a longer shelf life of a filling material in a filled and closed vessel.
- the total migration of the polymer composition can be a maximum of 1.2 mg cm 2, preferably a maximum of 1.0 mg cm 2, particularly preferably a maximum of 0.8 mg cm 2, whereby the total migration of the polymer composition can be determined according to DIN-EN 1186-14.
- a disclosed vessel closure can close a vessel.
- the vessel comprises a vessel mouth and a closable opening at the end of the vessel mouth. This opening closes one of the disclosed vessel closures.
- the vessel can be a glass vessel, a plastic vessel or a metal vessel.
- the vessel is a glass vessel.
- the opening of the vessel may have a diameter of at least 20 mm.
- the diameter of the opening of the vessel is a maximum of 120 mm.
- the closed and filled container can be thermally treated.
- the temperature of the thermal treatment is above the temperature of the (solid and/or liquid) food during the filling of the container.
- the thermal treatment can be carried out at a temperature of at least 60°C.
- the thermal treatment can also be carried out at a maximum temperature of 135°C (between 60°C and 135°C).
- the thermal treatment is carried out at a temperature of up to 135°C (between 60°C and 135°C) at an absolute ambient pressure of a maximum of 4.0 bar, preferably at an absolute ambient pressure between 1.0 bar and 4.0 bar.
- the pressure in the sealed vessel during a thermal treatment is lower than the pressure outside the sealed vessel.
- a typical value of the oxygen permeability rate of PVC-containing compositions used as sealing elements in vessel closures is about 220 cm 3 nr 2 d 1 bar 1 at 23°C.
- the oxygen permeability rates of known, commercially available PVC-free compositions in vessel closures are typically 650 cm3 nr2 d 1 barl and more. Oxygen scavengers are often added to these known compositions to reduce the presence of oxygen in a vessel closed with such a vessel closure.
- the PVC-free polymer compositions disclosed herein exhibit oxygen transmission rates that are close to the rates of PVC-containing compositions.
- the oxygen transmission rates of the composition disclosed herein are well below the oxygen transmission rates of known PVC-free compositions.
- a polymer composition with a low oxygen permeability rate allows the use of oxygen scavenger materials in the polymer composition and at the same time a low ingress of oxygen into the filled vessel is ensured.
- the butene-propylene copolymer is commercially available.
- the butene-ethylene copolymer used is available from LyondellBasell, for example.
- the copolymerized butene content can be at least 80 mol%.
- LDPE and HDPE are commercially available from various suppliers.
- the random propylene-ethylene copolymer can be purchased from Borealis.
- Homo-polybutene is available from LyondellBasell.
- SEBS is available from Kraton, for example from the Kraton G-series.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Closures For Containers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2023/052900 WO2024165140A1 (de) | 2023-02-07 | 2023-02-07 | Gefässverschluss mit dichtungselement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4662277A1 true EP4662277A1 (de) | 2025-12-17 |
Family
ID=85202060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23704088.6A Pending EP4662277A1 (de) | 2023-02-07 | 2023-02-07 | Gefässverschluss mit dichtungselement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4662277A1 (de) |
| CN (1) | CN120693369A (de) |
| WO (1) | WO2024165140A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2631721A1 (de) | 2012-02-23 | 2013-08-28 | Richemont International S.A. | Uhrkomponenten aus diamantverkleidetem Titan |
| KR101890545B1 (ko) | 2015-05-26 | 2018-08-21 | 바셀 폴리올레핀 이탈리아 에스.알.엘 | 클로져용 폴리올레핀 개스킷 |
| DE102018128283B4 (de) | 2018-07-23 | 2023-04-27 | Silgan White Cap Manufacturing Gmbh | Gefäßverschluss mit Dichtungselement |
| DE102019132561A1 (de) * | 2019-11-29 | 2021-06-02 | Silgan White Cap Manufacturing Gmbh | Geschäumtes Dichtungselement und Gefäßverschluss mit dem geschäumten Dichtungselement |
-
2023
- 2023-02-07 EP EP23704088.6A patent/EP4662277A1/de active Pending
- 2023-02-07 CN CN202380092311.2A patent/CN120693369A/zh active Pending
- 2023-02-07 WO PCT/EP2023/052900 patent/WO2024165140A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024165140A1 (de) | 2024-08-15 |
| CN120693369A (zh) | 2025-09-23 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20250902 |
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| AK | Designated contracting states |
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