Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
  • B65D39/0052—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in more than one piece
  • B65D39/0058—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in more than one piece from natural or synthetic cork, e.g. for wine bottles or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
  • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
  • B67B1/00—Closing bottles, jars or similar containers by applying stoppers
  • B67B1/03—Pretreatment of stoppers, e.g. cleaning, steaming, heating, impregnating or coating; Applying resilient rings to stoppers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2539/00—Details relating to closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
  • B65D2539/001—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers
  • B65D2539/008—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers with coatings or coverings
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/21—Circular sheet or circular blank
  • Y10T428/214—End closure

Definitions

• the invention relates to a bottle cap with a reduced Trichloranisolokance degree and a process for its preparation.
• cork taste of wine is a consequence of the mold-produced, halogen-containing, low molecular weight aromatics, most notably the musty smelling extremely odorous 2,4,6-trichloroanisole.
• bottle corks are impregnated with a two-component silicone rubber in a vacuum process.
• the advantage of this method is to provide inferior quality corks with improved sealing properties, as well as to reduce the extraction of aromatic cork ingredients affecting the taste of the beverage, such as trichloroanisole, and thereby enhance the cork.
• bottle corks are provided on the side facing the drinks with a slice of silicone elastomer which is intended to prevent the migration of trichloroanisole from the bottle cork into the beverage.
• the disadvantage of these bottle corks is that the silicone elastomer absorbs low molecular weight aromatic compounds well and thus can not act as a barrier for such substances.
• the effect of the processes described in the literature is based on the fact that for the aromatic compounds a chemical equilibrium is established between the phases silicone elastomer and liquid, in which a part of the aromatic compound is permanently absorbed in the silicone.
• a surface of the bottle cork is provided with a coating of an elastomer, characterized in that the elastomer contains uncomplexed ⁇ -, ⁇ - or ⁇ -cyclodextrin or uncomplexed ⁇ -, ⁇ - or ⁇ -cyclodextrin derivative.
• Cork-containing bottle corks are preferably cork stoppers for closing beverage bottles, such as wine bottles.
• the ⁇ -, ⁇ - or ⁇ -cyclodextrin or an ⁇ -, ⁇ - or ⁇ -cyclodextrin derivative may be all previously known cyclodextrin (derivatives), it may also be a mixture of said substances.
• it is ⁇ -, ⁇ - or ⁇ -cyclodextrin or a cyclodextrin derivative selected from the group of alkylated, hydroxyalkylated, acylated and sulfoalkyl ether substituted ⁇ -, ⁇ - or ⁇ -cyclodextrins.
• cyclodextrin also includes cyclodextrin derivatives.
• the elastomer preferably contains 0.01 to 40% by weight of CD, preferably 10 to 25% by weight.
• the wt .-% indication refers to the total weight of the elastomer.
• any elastomer containing uncomplexed CD is suitable as a coating for a cork.
• a CD-containing elastomer is obtainable by incorporating CD in the elastomer. This can happen before, during or after the production of the elastomer, depending on the type of elastomer.
• the incorporation of the CD is preferably carried out in a manner known for the incorporation of a filler in the elastomer.
• organopolysiloxanes used according to the invention are commercially available products or can be prepared by processes customary in silicon chemistry.
• organopolysiloxanes (1) are preferably linear or branched organopolysiloxanes of units of the general formula R a R 1 b S i O 4 - a - b 2 wherein R is the same or different, a monovalent, optionally substituted hydrocarbon radical having 1 to 18 carbon atoms per radical and R 1 is the same or different, is a monovalent hydrocarbon radical having a terminal, aliphatic carbon-carbon multiple bond having 2 to 8 carbon atoms per radical, a 0, 1, 2 or 3, b 0, 1 or 2 and the sum a + b ⁇ 3, with the proviso that the organopolysiloxanes of the formula (I) contain at least 2 radicals R 1 per molecule.
• R is preferably a hydrocarbon radical free of aliphatic carbon-carbon multiple bonds.
• radicals R are alkyl radicals, such as the methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, , neo-pentyl, tert-pentyl, hexyl, such as the n-hexyl radical, heptyl radicals, such as the n-heptyl radical, octyl radicals, such as the n-octyl radical and iso-octyl radicals, such as the 2,2,4-trimethylpentyl radical, nonyl radicals, such as the n-nonyl radical, decyl radicals, such as n- Decyl, dodecyl, such as the n-dodecyl, and
• substituted radicals R are haloalkyl radicals, such as the 3,3,3-trifluoro-n-propyl radical, the 2,2,2,2 ', 2', 2'-hexafluoroisopropyl radical, the heptafluoroisopropyl radical and haloaryl radicals, such as the o-, m- and p-chlorophenyl
• the radical R is preferably a monovalent hydrocarbon radical having 1 to 6 carbon atoms, the methyl radical being particularly preferred.
• radicals R 1 are alkenyl radicals, such as the vinyl, 5-hexenyl, cyclohexenyl, 1-propenyl, allyl, 3-butenyl and 4-pentenyl radicals, and alkynyl radicals, such as ethynyl, propargyl and 1 -Propinylrest.
• the radical R 1 is preferably alkenyl radicals, with the vinyl radical being particularly preferred.
• organopolysiloxane (1) or various types of organopolysiloxanes (1) can be used.
• Preferred organopolysiloxanes (1) are those of the general formula R 1 G R 3 - G SiO ( SiR 2 O ) n ( SiR R 1 O ) m SiR 3 - G R 1 G where R and R 1 have the meaning given above g is 0, 1, 2 or 3, preferably 1, m is 0 or an integer from 1 to 5000 and n is an integer from 70 to 10,000, with the proviso that the organopolysiloxanes of the formula (II) contain at least 2 radicals R 1 per molecule.
• formula (II) should be understood to mean that n units - (SiR 2 O) - and m units - (SiRR 1 O) - can be distributed in any desired manner, for example as a block or randomly, in the organopolysiloxane molecule.
• the organopolysiloxanes (1) have an average viscosity of preferably 100 to 100,000,000 mPa.s at 25 ° C.
• Organopolysiloxanes (2) are organopolysiloxanes (2) in the addition crosslinking of the silicone rubber compositions according to the invention.
• Organopolysiloxanes (2) are preferably linear, cyclic or branched organopolysiloxanes of units of the general formula R e H f S i O 4 - e - f 2 in which R has the meaning given above, e 0, 1, 2 or 3, f 0, 1 or 2 and the sum of e + f ⁇ 3, with the proviso that the organopolysiloxanes of the formula (III) have 1.0 to 2.0 wt .-% Si-bonded hydrogen used.
• Preferred organopolysiloxanes (2) are those of the general formula H h R 3-h SiO (SiR 2 O) o (SiR 2 -x H x O) p SiR 3 -h H h (IV) where R has the meaning given above, h is 0, 1 or 2, preferably 0, o is 0 or an integer from 1 to 1,000, preferably 0, p is an integer from 1 to 1,000, preferably 40 to 70 and x is 1 or 2, preferably 1, with the proviso that the organopolysiloxanes of the formula (IV) have 1.0 to 2.0 wt .-%, preferably 1.5 to 1.7 wt .-%, Si-bonded hydrogen used.
• formula (IV) should be understood as meaning that o units - (SiR 2 O) - and p units (SiR 2 -x H x O) - be distributed in any desired manner, for example as a block or randomly, in the organopolysiloxane molecule can.
• organopolysiloxanes (2) are, in particular, copolymers of dimethylhydrogensiloxane, methylhydrogensiloxane, dimethylsiloxane and trimethylsiloxane units, copolymers of trimethylsiloxane, dimethylhydrogensiloxane and methylhydrogensiloxane units, copolymers of trimethylsiloxane, dimethylsiloxane and methylhydrogensiloxane units, copolymers of methylhydrogensiloxane and trimethylsiloxane units, Copolymers of methylhydrogensiloxane, diphenylsiloxane and trimethylsiloxane units, copolymers of methylhydrogensiloxane, dimethylhydrogensiloxane and diphenylsiloxane units, copolymers of methylhydrogensiloxane, phenylmethylsiloxane, trimethylsiloxane and /
• organopolysiloxane (2) or various types of organopolysiloxanes (2) can be used.
• the organopolysiloxanes (2) have an average viscosity of preferably 10 to 100,000 mPa.s at 25 ° C, preferably 10 to 500 mPa.s at 25 ° C, particularly preferably 10 to 30 mPa.s at 25 ° C.
• compositions according to the invention can also be organopolysiloxanes (2 ') of the general formula H v R 3-v SiO (SiR 2 O) s (SiRHO) t SiR 3 -v H v (IV ') where R has the meaning given above, v 0, 1 or 2, s 0 or an integer from 1 to 1,000 t is 0 or an integer from 1 to 1,000, with the proviso that the organopolysiloxanes of the formula (IV ') contain at least 2 Si-bonded hydrogen atoms per molecule but contain less than 1.0% by weight of Si-bonded hydrogen.
• the organopolysiloxanes (2 ') have an average viscosity of preferably 10 to 100,000 mPa.s at 25 ° C, preferably 10 to 500 mPa.s at 25 ° C.
• Organopolysiloxane (2) is preferably used in the silicone rubber compositions according to the invention in amounts of from 0.01 to 20% by weight, based on the total weight of the organopolysiloxanes (1).
• Organopolysiloxane (2 ') is preferably used in the silicone rubber compositions of the invention in amounts of from 0 to 100% by weight, based on the total weight of the organopolysiloxanes (1) used.
• the same catalysts can be used in the silicone rubber compositions according to the invention, which could also be used to promote the addition of Si-bonded hydrogen to aliphatic multiple bond.
• the catalysts are preferably a metal from the group of platinum metals or a compound or a complex from the group of platinum metals.
• catalysts are metallic and finely divided platinum, which may be supported on supports such as silica, alumina or activated carbon, compounds or complexes of platinum such as platinum halides, eg PtCl 4 , H 2 PtCl 6 .6H 2 O, Na 2 PtCl 4 * 4H 2 O, platinum-olefin complexes, platinum-alcohol complexes, platinum-alcoholate complexes, platinum-ether complexes, platinum-aldehyde complexes, platinum-ketone complexes, including reaction products of H 2 PtCl 6 * 6H 2 O and cyclohexanone, platinum-vinyl-siloxane complexes such as platinum-1,3-divinyl-1,1,3,3-tetra-methyl-disiloxane complexes with or without detectable inorganic halogenated content, bis (gamma-picoline) platinum dichloride, trimethylenedipyridine platinum dichloride, dicyclopenta
• the catalyst (3) is preferably used in the silicone rubber compositions of the invention in amounts of from 0.001 to 0.1% by weight, calculated in each case as elemental platinum and based on the total weight of the organopolysiloxanes (1) and (2).
• inhibitors (4) are 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, benzotriazole, dialkylformamides, alkylthioureas, methyl ethyl ketoxime, organic or organosilicon compounds having a boiling point of at least 25 ° C.
• the inhibitor (4) is used in amounts of preferably 0.001 to 10 wt .-%, based on the total weight of the organopolysiloxanes (1) and (2).
• organopolysiloxanes (5) their preferred and particularly preferred embodiments and examples, the corresponding statements on the organopolysiloxanes (1) apply.
• the peroxides (6) used are organic peroxides which serve as a source of free radicals.
• organic peroxides include acyl peroxides such as dibenzoyl peroxide, bis (4-chlorobenzoyl) peroxide, bis (2,4-dichlorobenzoyl) peroxide and bis (4-methylbenzoyl) peroxide; Alkyl peroxides and aryl peroxides such as di-tert-butyl peroxide, 2,5-bis (tert-butylperoxy) -2,5-dimethylhexane, dicumyl peroxide and 1,3-bis (tert-butylperoxy-isopropyl) -benzene; Perketals such as 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane; Peresters such as diacetyl peroxydicarbonate, tert-butyl perbenzoate, tert-
• organic peroxide It may be a kind of organic peroxide, it may also be a mixture of at least two different types of organic peroxide used.
• peroxides are used in amounts of 0.01 to 5.0 wt .-%, preferably 0.2 to 1.2 wt .-%, each based on the total weight of the diorganopolysiloxanes used, in the compositions of the invention.
• organopolysiloxanes (7) are preferably those of the general formula XR 2 SiO (R 2 SiO) n SiR 2 X (V) where R is identical or different, monovalent, optionally substituted hydrocarbon radicals having 1 to 18 carbon atoms per radical, X is a hydroxyl group and n is an integer of at least 10, used.
• hydroxyl groups X in the above formula (V) may, if desired, be completely or partially replaced by other condensable groups such as alkoxy groups having from 1 to 4 carbon atoms per group.
• siloxane units may be present in addition to the diorganosiloxane units R 2 SiO .
• examples of such other, mostly only as impurity present siloxane units are those of the formulas RSiO 3/2 , R 3 SiO 1/2 and SiO 4/2 , wherein R has the meaning given above.
• organopolysiloxane or more kinds of organopolysiloxanes can be used.
• the organopolysiloxanes have a viscosity of preferably 50 to 80,000 mPa.s at 25 ° C, preferably 1000 to 20,000 mPa.s at 25 ° C.
• crosslinkers (8) are preferably used moisture-sensitive silanes of the general formula R x SiZ 4-x and / or their partial hydrolysates, which preferably have 2 to 10 silicon atoms, where R has the meaning given above, x is 0 or 1 and Z is the same or different hydrolyzable radical selected from the group acyloxy, optionally substituted hydrocarbonoxy, amino, oxime, amide, aminoxy and enoxy radical.
• acyloxy groups are acetoxy and formyloxy groups and 2-ethylhexanoxy groups.
• hydrocarbonoxy groups are methoxy, ethoxy, n-propyloxy, isopropyloxy, n-butyloxy groups.
• substituted hydrocarbonoxy groups are alkoxy-substituted hydrocarbonoxy groups such as methoxyethyleneoxy, ethoxyethyleneoxy and methoxyisopropyleneoxy groups.
• amino groups are n-butylamino, sec-butylamino and cyclohexylamino groups.
• oxime groups are methyl ethyl ketoxime groups, methyl isobutyl ketoxime groups, methyl n-amyl ketoxime groups and dimethylketoxime groups.
• amide groups are n-methylbenzamido groups and n-methylacetamido groups.
• aminoxy group is the hydroxylamine group.
• An example of an enoxy group is the isoprenoxy group.
• the hardener component is mixed in immediately before use.
• This hardener component is preferably a tetraalkoxysilane, preferably tetraethyl or tetrapropylsilicate.
• the catalyst (9) used are the condensation catalysts known to the person skilled in the art.
• condensation catalysts are butyl titanates and organic tin compounds, such as di-n-butyltin diacetate, di-n-butyltin dilaurate and reaction products of at least two oxygen-bonded to silicon, optionally substituted by an alkoxy group, monovalent hydrocarbon radicals as hydrolyzable groups silane or its oligomer with diorganotin diacylate, in which reaction products all valences of the tin atoms are selected by oxygen atoms of the moiety ⁇ SiOSn ⁇ or are saturated by SnC-bonded, monovalent organic radicals.
• the preparation of such reaction products is described in detail in US Pat. No. 4,460,761 (issued Jul. 17, 1984, A. Schiller et al., Wacker-Chemie GmbH).
• the silicone rubber compositions may contain other ingredients such as fillers (10) such as reinforcing and non-reinforcing fillers and resinous organopolysiloxanes such as MQ resins (11).
• reinforcing fillers (11a), ie fillers with a BET surface area of at least 50 m 2 / g, are fumed silica, precipitated silica or silicon-aluminum mixed oxides having a BET surface area of more than 50 m 2 / g.
• the fillers mentioned may be rendered hydrophobic, for example by treatment with organosilanes, silanes or siloxanes or by etherification of hydroxyl groups to alkoxy groups. Preference is given to pyrogenic silicas having a BET surface area of at least 100 m 2 / g.
• the silicone rubber compositions contain reinforcing fillers (11a) in amounts of preferably 0 to 20% by weight.
• non-reinforcing fillers (11b), ie fillers with a BET surface area of less than 50 m 2 / g are powders of quartz, cristobalite, diatomaceous earth, calcium silicate, zirconium silicate, montmorillonites such as bentonites, zeolites including molecular sieves such as sodium aluminosilicate , Metal oxides such as iron oxide, zinc oxide, titanium dioxide and aluminum oxide or their mixed oxides, metal hydroxides such as aluminum hydroxide, metal carbonates such as calcium carbonate, magnesium carbonate and zinc carbonate, metal sulfates such as barium sulfate, gypsum, silicon nitride, silicon carbide, boron nitride, glass, carbon and plastic powder and glass and plastic hollow spheres.
• the silicone rubber compositions contain non-reinforcing fillers in amounts of preferably 0 to 50 wt .-%.
• It may be one type of filler, but it may also be a mixture of at least two fillers.
• the resinous organopolysiloxanes preferably contain monofunctional (M) and tri- (T) and / or tetrafunctional (Q) units, optionally also difunctional (D) units.
• MQ resins (11) which consist of monofunctional and tetrafunctional units.
• the monofunctional units may contain as functional groups unsaturated hydrocarbon radicals, such as alkenyl groups or Si-bonded hydrogen.
• MQ resins (11) from units of the formulas R 5 R 2 SiO 1/2 and SiO 4/2 wherein R 5 is a radical R, a hydrogen atom or a radical R 1 and R and R 1 have the meaning given above, and the Units of the formula R 5 R 2 SiO 1/2 may be the same or different.
• the ratio of M units of the formula R 5 R 2 SiO 1/2 to Q units of the formula SiO 4/2 is preferably 4: 1 to 1: 2.
• MQ resins (12a) with unsaturated M units are those of units of the formulas SiO 4/2 and R 1 R 2 SiO 1/2 and optionally R 3 SiO 1/2 , ie MQ resins with exclusively unsaturated M units or MQ resins with saturated and unsaturated M units wherein R and R 1 have the meaning given above and the ratio of M units R 1 R 2 SiO 1 ⁇ 2 and optionally R 3 SiO 1 ⁇ 2 to Q units SiO 4/2 is preferably 4: 1 to 1: 2 and the ratio of saturated M units R 3 SiO 1 ⁇ 2 to unsaturated M units R 1 R 2 SiO 1 ⁇ 2 preferably 10: 1 to 0: 1.
• the MQ resins (12a) are preferably used in amounts of from 0 to 100% by weight, based on the total weight of the organopolysiloxanes (1).
• M-resins containing Si-bonded hydrogen M-12 (12b) are those of units of the formulas SiO 4/2 and HR 2 SiO 1/2 and optionally R 3 SiO 1/2 , ie MQ resins containing only M units with Si-bonded hydrogen, or MQ resins containing M units with and without Si-bonded hydrogen, which in addition-crosslinking two component mixtures are preferably contained in component (B), where R has the meaning given above and the ratio of M units HR 2 SiO 1 ⁇ 2 and optionally R 3 SiO 1 ⁇ 2 to Q units SiO 4/2 is preferably 4: 1 to 1: 2, and the ratio of M units R 3 SiO 1/2 to M units HR 2 SiO 1/2 is preferably 10: 1 to 0: 1.
• the MQ resins (12b) are preferably used in amounts of from 0 to 20% by weight, based on the total weight of the organopolysiloxanes (1).
• CD and the other constituents (10) and (11) may be contained in component (A) and / or (B) in the case of two components.
• the cyclodextrins or cyclodextrin derivatives are added to the silicone mixture immediately prior to processing.
• the invention further relates to methods for producing the bottle corks according to the invention.
• a method is characterized in that a bottle cork in a flowable, addition-crosslinking silicone rubber composition, for example prepared from the components CD, (1), (2), (3), (4), (10) and (11) is dipped, and then the excess silicone rubber composition is removed from the bottle cap and the silicone rubber composition is crosslinked.
• a flowable, addition-crosslinking silicone rubber composition for example prepared from the components CD, (1), (2), (3), (4), (10) and (11) is dipped, and then the excess silicone rubber composition is removed from the bottle cap and the silicone rubber composition is crosslinked.
• a highly viscous, addition-curing silicone e.g. prepared from components (1), (2), (3), (4), (5) and (10) or from components (1), (5), (6) and (10) by press vulcanization of the silicone is formed into a round shaped article and the molded article by means of a silicone adhesive, preferably a known to the expert as acetic acid crosslinking RTV-1 silicone, is adhered to the end face of a bottle cap.
• Another method is characterized in that a pasty, addition-crosslinking silicone, e.g. prepared from the components (1), (2), (3), (4), (10) and (11) by means of press vulcanization of the silicone to a round molded article by injection molding and this molded article by means of a silicone adhesive, preferably a person skilled in the art as RTV-1 known as acetic acid-known silicone, is glued to the front of a bottle cork.
• a pasty, addition-crosslinking silicone e.g. prepared from the components (1), (2), (3), (4), (10) and (11) by means of press vulcanization of the silicone to a round molded article by injection molding and this molded article by means of a silicone adhesive, preferably a person skilled in the art as RTV-1 known as acetic acid-known silicone, is glued to the front of a bottle cork.
• Another method is characterized in that a condensation-curing, two-component silicone, e.g. prepared from the components: (1), (7), (8), (9), and (10) is applied to the beverage facing side of a bottle cork and then curing and adhering of the silicone takes place directly on the bottle cork at room temperature.
• a condensation-curing, two-component silicone e.g. prepared from the components: (1), (7), (8), (9), and (10) is applied to the beverage facing side of a bottle cork and then curing and adhering of the silicone takes place directly on the bottle cork at room temperature.
• a further method is characterized in that a condensation-crosslinking silicone, for example composed of a component, prepared from the components (1), (7), (8), (9), and (10) on the side facing the beverage Bottle cork is applied and cured at room temperature. The silicone adheres directly to the bottle cork.
• a condensation-crosslinking silicone for example composed of a component, prepared from the components (1), (7), (8), (9), and (10) on the side facing the beverage Bottle cork is applied and cured at room temperature. The silicone adheres directly to the bottle cork.
• Another method is characterized in that a cork rotating in a closed drum is sprayed with a silicone and thereby wetted on its surface and the silicone is then cured at room temperature.
• Another method is characterized in that a highly viscous, addition-curing silicone, e.g. prepared from the components (1), (2), (3), (4), (5) and (10) or from the components (1), (5), (6) and (10) is mixed with cork pieces and molding the mass into a plug-shaped article by press-vulcanization of the silicone.
• a highly viscous, addition-curing silicone e.g. prepared from the components (1), (2), (3), (4), (5) and (10) or from the components (1), (5), (6) and (10) is mixed with cork pieces and molding the mass into a plug-shaped article by press-vulcanization of the silicone.
• bottle corks Commercially available bottle corks are preferably used with a weight of preferably 2.5 to 4.0 g.
• the two components are mixed.
• the cork stoppers are then immersed in this mixture and vacuum applied.
• the silicone penetrates into the cavities of the cork. After 5 to 20 minutes, the vacuum is broken and pressure is applied to the container to achieve as complete a wetting as possible. After releasing the overpressure, excess silicone is removed from the surface of the corks and the silicone cured on the cork.
• the curing takes place at a temperature between 20 and 200 ° C, preferably between 40 and 80 ° C.
• Table 7 component Parts by weight V polymer 1200 A 700 HDK 150 metal oxides 150 peroxide 10 Cavamax W8 100
• the mixture of example 5 or 7 or the combined mixture of the two components from example 6 is processed into shaped parts in a typical injection molding or compression molding process for these substances. These moldings are connected to the Korkstopfen in an appropriate manner. This can be done by gluing with a silicone adhesive or by mechanical fixing or a combination of both.
• Example 5 or 7 or the combined mixture of the two components of Example 6 can be mixed with pieces of cork and this compound by the vulcanization of the silicone part in a typical for these substances injection molding or compression molding process to stopper.
• Table 9 component Parts by weight OH polymer 20,000 500 HDK 50 metal oxides 50 ES 15 10 Ti (BuO) 4 0.4 Cavasol W6 80
• the combined mixture of the two components of Example 8 or the mixture of Example 9 is added to the wine later brushed front side of the cork so that the cork can have little or no direct contact with the wine.
• a recess is preferably placed in the face of the cork prior to application of the silicone.
• the vulcanizate preferably forms a mechanical anchoring in the plug.
• silicones of the above mixtures of Examples 8 and 9 can be applied one after the other and thus combined with one another.
• the ratio silicone: wine is approximately 1: 1000 in a 0.71 bottle of wine with a 0.5 to 1.0 g silicone coated cork. Therefore, 0.1 g of silicone vulcanizates according to Ex. 1 to 4 in 100 ml of 12% ethanol, which had an initial concentration of TCA of 0.2 ppm, and the proportion of TCA remaining in the ethanol solution were determined at different times.
• Table 10 shows by way of example the results for one of the silicone vulcanizates in which, in addition, the CD content was varied as indicated.
• Table 10 No. Cyclodextrin in the vulcanizate in% Percentage of TCA remaining in solution 1d 3d 7d 14d 21d 28d 1 23% 50% 40% 20% 15% 5% 5% 2 10% 75% 30% 20% 20% 15% 15% 3 2% 70% 35% 30% 35% 35% 30% 4 0% 75% 70% 60% 60% 60% 60% 60% 60% 60% 60% 60% 60% 60%
• a CD-free silicone vulcanizate (prior art) absorbs about 40% of the original TCA dissolved in the ethanol within 1 week.

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