EP1577229A2 - Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose - Google Patents

Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose Download PDF

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Publication number
EP1577229A2
EP1577229A2 EP05075623A EP05075623A EP1577229A2 EP 1577229 A2 EP1577229 A2 EP 1577229A2 EP 05075623 A EP05075623 A EP 05075623A EP 05075623 A EP05075623 A EP 05075623A EP 1577229 A2 EP1577229 A2 EP 1577229A2
Authority
EP
European Patent Office
Prior art keywords
grommet
rubber
aerosol
aerosol valve
composition
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.)
Withdrawn
Application number
EP05075623A
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English (en)
French (fr)
Inventor
Aster De Schrijver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP05075623A priority Critical patent/EP1577229A2/de
Publication of EP1577229A2 publication Critical patent/EP1577229A2/de
Withdrawn legal-status Critical Current

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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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/46—Tilt valves
    • 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38—Details of the container body

Definitions

  • the present invention concerns an improvement to a rubber grommet for a tilting and/or gun aerosol valve grommet (hereafter called the aerosol valve grommet), more particularly regarding the protection against moisture diffusion and uptake through the rubber grommet.
  • the aerosol valve will be used for dispensing one or two component polyurethane (PU) foam systems contained in a pressurized can or vessel or any other polymer system curing or sensitive by/to moisture/water uptake.
  • PU polyurethane
  • the type of aerosol valves relevant for the present invention is used for more than 25 years in order to dispense the content of an aerosol can.
  • the valve By tilting or vertical activation of the stem, the valve opens and delivers the vessel's content.
  • Such a valve consists of a number of plastic and metal parts.
  • the inner gasket/seal, called the grommet, is made of rubber.
  • Other parts are a special metal cup with inlaid rubber gasket and a plastic stem.
  • the polyurethane and/or similar components formed due to moisture uptake (diffusion) inside the can or vessel sticks against the grommet and or the stem. Once the first layer of PU formed on the grommet on the face inside the can or vessel, the sealing properties of the valve diminished and makes the valve subject to blocking and/or leaking.
  • a standard tilting or gun valve get stucked after contact with the polyurethane prepolymer in the can at higher temperature and higher conditions of humidity. This contact is made possible by inappropriate storage of cans (horizontal or upside down) or excessive shaking during transport.
  • a hydrophobic thermoplastic or non thermoplastic elastomer could be used such as : styrene-butadiene, butylene-styrene, silicone rubbers, isopropyl ether (Kraton, Shell), chlorinated polyethylene (Tyrin, Dupont de Nemours), epichlorhydrin homopolymers or copolymer, ethylene propylene (Nordel, Dupont de Nemours), fluoroelastomers (Viton, Dupont de Nemours), alcryn MPR (chlorinated olefin interpolymer alloy), Santoprene etc.
  • a rubber grommet with a moisture barrier provided by chemical treatment of a rubber grommet that may be otherwise usual.
  • the rubber can be BUNA, EPDM or Neoprene, butyl etc...
  • the chemical treatment is a coating of at least part of the grommet surface in contact with the container's component, by a inert hydrophobic substance dispensed or brushed on said surface or by dipping or impregnation of the whole grommet into the substance.
  • Fig. 1 illustrates an example of the tilting of a valve as is well-known, with the grommet 1, the stem 4 and the cup 5 to be coupled with the aerosol can or vessel (not illustrated).
  • the tilting action provides an open passageway for the content of the can.
  • Fig. 2 illustrates a similar valve, the arrows indicating the diffusion of the propellant and prepolymer from the inside of the can on one side and, on the other side, of the moisture from the environment. It is to be noted that the moisture may access the grommet also through the hollow stem. There is shown an internal “front” in the grommet where a reaction between both components occurs and wherein consequently hardness is increased.
  • Fig. 3 represents schematically a transversal section of an isolated classical grommet 1 with a hole 2 for the stem and for which the bottom part 3 has been coated according to the invention, for example by spraying (arrows), brushing, dipping or impregnation of the whole grommet.
  • the chemicals used for this type of application are preferably silicon or fluoro-polymer based compositions.
  • the treatment may be conducted either by spraying or directly laying a coating by dipping or impregnation of the whole grommet.
  • a coating/reactive agent preferably just after demoulding the rubber, it can be sprayed by a coating/reactive agent.
  • the rubber can also be brushed, impregnated or plasma treated in order to obtain a coating on the whole surface of the grommet or only on the bottom part (ref. 3 in fig. 1).
  • the applied composition can be a solution of fluoro-polymer or a silicon based composition.
  • ACMOS 70-2406 ACMOS 70-2406
  • the Münch coating spray MKX 02-125 may also be used. It is postulated that some chemical (covalent) bonding is produced between the coating and the rubber.
  • the grommet is siliconized. This extra post siliconisation improves the snappiness of the rubber and the multi-use properties of the valve.
  • a typical silicone mixture used is Bayer M350.
EP05075623A 2004-03-15 2005-03-15 Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose Withdrawn EP1577229A2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05075623A EP1577229A2 (de) 2004-03-15 2005-03-15 Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04075878 2004-03-15
EP04075878 2004-03-15
EP05075623A EP1577229A2 (de) 2004-03-15 2005-03-15 Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose

Publications (1)

Publication Number Publication Date
EP1577229A2 true EP1577229A2 (de) 2005-09-21

Family

ID=34839804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05075623A Withdrawn EP1577229A2 (de) 2004-03-15 2005-03-15 Verbesserung der hydrophoben Eigenschaften der Gummidichtung des Kippventils einer Sprühdose

Country Status (1)

Country Link
EP (1) EP1577229A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2016000A1 (de) * 2006-02-09 2009-01-21 Ball Packaging Europe GmbH Behälter mit verschiebbarem ventilstück zur gesteuerten abgabe eines gebrauchsfluids
US9434529B2 (en) 2004-09-16 2016-09-06 Clayton Corporation Aerosol dispenser valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9434529B2 (en) 2004-09-16 2016-09-06 Clayton Corporation Aerosol dispenser valve
EP2016000A1 (de) * 2006-02-09 2009-01-21 Ball Packaging Europe GmbH Behälter mit verschiebbarem ventilstück zur gesteuerten abgabe eines gebrauchsfluids

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