• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a valve member for a distribution valve for foam products, in particular for a distribution valve for a polyurethane foam reservoir with valve member movable with respect to a seal. It also relates to such a distribution valve and to a foam container. In order to provide alternative materials for valve members, according to the invention it is proposed that the valve member be made of plastic filled with basalt particles in an amount between 1% and 60% by weight. Surprisingly, it has been found that valve members made of plastic filled with basalt particles in these amounts exhibit improved properties, such as strength and wear rates, as compared to unfilled plastics and compared to glass-filled plastics.
    公开号:BE1021056B1
    申请号:E2014/0441
    申请日:2014-06-11
    公开日:2015-03-10
    发明作者:Jean-Marie Poppe；Jordi Demey
    申请人:Altachem Nv；
    IPC主号:
    专利说明:

    DESCRIPTION
    Valve member
    The present invention relates to a valve member for a distribution valve for foam products, in particular for a distribution valve for a polyurethane foam reservoir with a valve member that is displaceable relative to a seal. It also relates to such a distribution valve and to a foam reservoir.
    Foam materials such as polyurethane foam have found wide application in the construction sector, for example as fillers and insulating agents. It concerns one-component (IK) and two-component (2K) polyurethane foam, the first being moisture-curable, while the second requires no moisture to cure. Both types of polyurethane foam are usually packaged in spray cans with a distribution valve. When the manifold valve is activated by the user, the valve member is moved and it is possible to dispense foam. The valve member, the part of the distribution valve that is used most often, must be able to offer sufficient resistance during the service life of the distribution valve.
    In addition, there is a problem of stickiness in the case of IK and 2K polyurethane foam. If moisture penetrates the spray can through the manifold valve, the foam hardens around the valve member and interferes with the operation of the valve by being sealed while it is closed.
    It is well known that glass-filled polyolefin is stronger than polyolefin without glass filling. A valve member made from a glass-filled polyethylene with a glass content between 3 and 30% is known from EP 1 789 343 BI. This valve member is described as being more resistant to problems due to moisture infiltration than valve members without glass filling. However, the surface roughness of glass-filled material is not satisfactory for all technical applications and leads to increased wear of the means of production and assembly lines. EP 262 649 A2 describes a process for preparing blends of incompatible thermoplastic hydrocarbon polymers by means of a combinable blend containing basalt filler and certain reinforcing additives.
    The problem of gas loss is addressed in EP 2 354 037 A1, in which the valve member comprises an annular base flange with an additional layer for a better seal against the bottom surface of the seal flange. In addition to good tack resistance, this guarantees good gas loss prevention, but the cost of the valve member is quite high for a basic product such as reservoirs with moisture-curable mixtures such as polyurethane.
    Despite the proposal of solutions, it can be argued that there remains a need to reduce production costs and at the same time to ensure optimum stability, strength, and resistance to tack and gas loss properties of the valve.
    The object of the present invention is to provide materials for valve members that meet these criteria.
    This object is achieved according to the present invention, because the valve is made of plastic filled with basalt particles with an amount between 1% and 60% by weight.
    Surprisingly, it has been found that valve members made of plastic filled with basalt particles exhibit improved properties in these amounts, such as strength and wear rates, compared to unfilled plastics and compared to plastics filled with glass.
    A preferred embodiment of the present invention is that in which the basalt particles are selected from the group comprising basalt particles, mica particles, wollastonite particles and talc particles.
    The best results were achieved with tests with basalt fibers. However, the other types of particles also show sufficient resistance.
    An improvement of the present invention consists in the fact that a combinable agent is added to the plastic.
    In fact, the addition of a combinable agent improves the adhesion between the plastic and the basalt particles.
    It is within the objectives of the present invention that the combinable agent is selected from the group consisting of maleic acid, a condensation product of maleic acid with an aliphatic, aromatic or heterocyclic polyol, an acrylamide maleimide or maleamic acid of an aliphatic, aminosilanes, alkylsilanes, aromatic or heterocyclic polyamine and titanium dioxide.
    It was found that derivatives of both maleic acid and amino silanes, alkylsilanes, aromatic or heterocyclic polyamine are very suitable combinable agents for improving adhesion between plastics and basalt particles.
    According to the present invention, the plastic was selected from the group consisting of polyolefins, polyesters, and polyoxymethylene.
    It is preferred that the polyolefins be selected from the group consisting of polyethylene, polypropylene, medium density polyethylene, medium density polypropylene, high density polyethylene, high density polypropylene and metallocene polyethylene.
    The preferred plastics for valve members are high density polyethylene and especially polyethylene since these materials have been used successfully for many years for valve members and because they are available on the market at reasonable prices.
    Preferred polyesters are polyethylene terephthalate and polybutylene terephthalate.
    In the preferred embodiment of the present invention, the basalt particles are in the form of basalt fibers, basalt powder or basalt nanopowder.
    In this connection, it is preferred that the basalt fibers have an average length between 0.1 and 12 mm, even better between 1 and 8 mm and ideally between 2 and 6 mm.
    Width / length ratios of the basalt fibers between 1:20 and 1: 500, even better between 1:50 and 1: 250 and ideally between 1: 100 and 1: 200 gave the best results.
    The basalt powder preferably has an average particle size between 0.1 mm and 10 mm, more preferably between 1 and 8 mm and ideally between 3 and 6 mm.
    Both for basalt fibers and for basalt particles, preference is given to a length or average particle size that is approximately equal to the length of the plastic granulate used for the production of the valve members.
    With respect to the basalt nanopowder, the average particle size is between 1 nm and 100 nm, better between 10 nm and 50 nm and ideally between 20 nm and 30 nm.
    The valve member is preferably made of a plastic-filled material with basalt particles with an amount between 1% and 50% weight percent, more preferably with an amount between 5 and 40% weight percent and ideally with an amount between 10 and 35% weight percent.
    The invention also relates to a foam product distribution valve, which includes a valve member that is movable relative to a seal, the valve member being a valve member according to the present invention.
    A preferred embodiment of the invention is that wherein the manifold valve is one for one component or two component polyurethane foam. One-component (1K) or two-component (2K) polyurethane foam is widely used in industry and construction.
    The invention further relates to a foam reservoir with a distribution valve, the distribution valve being a distribution valve according to the present invention.
    The preferred embodiment is explained in detail below.
    Example 1
    A valve member is made of plastic granulate consisting of high-density polyethylene and long basalt fibers. The plastic granules have an average size of approximately 9 mm and are filled with 33% by weight of basalt fibers with an average length that essentially corresponds to the size of the plastic granulates (approximately 8 mm) and an average diameter of 17 µm. The basalt fibers have a plastic coating and maleic acid is used as a combinable agent.
    The valve member made by injection molding the above composition is used in a distribution valve on a 1 K or 2 K polyurethane foam reservoir. It exhibits better resistance (stress at break (DIN EN 527): 80 MPa, elongation at break (DIN EN 527): 3%, tensile modulus (DIN EN 527): 5800 MPa) and less stickiness, ie less probability that the contents of the reservoir that was accidentally cured adheres to the valve member and interferes with the operation of the valve; this in comparison with conventional valve members.
    Example 2:
    A valve member is made of plastic granulate consisting of high-density polyethylene and short basalt fibers. The plastic granules have an average size of approximately 9 mm and are filled with 33% by weight of basalt fibers with an average length of approximately 1 mm and an average diameter of 17 µm. Maleic acid is used as a combinable agent.
    The valve member made by injection molding the above composition is used in a distribution valve on a 1 K or 2 K polyurethane foam reservoir. It exhibits better mechanical resistance (stress at break (DIN EN 527): 80 MPa, elongation at break (DIN EN 527): 3%, tensile modulus (DIN EN 527): 5800 MPa) and less stickiness, ie less probability that the contents of the reservoir that was accidentally cured adheres to the valve member and interferes with the operation of the valve; this in comparison with conventional valve members.
    Example 3:
    A valve member is made of plastic granulate consisting of high-density polyethylene and long basalt fibers. The plastic granules have an average size of approximately 9 mm and are filled with 33% by weight of basalt fibers with an average length that essentially corresponds to the size of the plastic granulates (approximately 8 mm) and an average diameter of 17 µm. The basalt fibers have a plastic coating and maleic acid is used as a combinable agent.
    The valve member made by injection molding the above composition is used in a distribution valve on a 1 K or 2 K polyurethane foam reservoir. It exhibits better mechanical resistance (stress at break (DIN EN 527): 80 MPa, elongation at break (DIN EN 527): 3%, tensile modulus (DIN EN 527): 5800 MPa) and less stickiness, ie less probability that the contents of the reservoir that was accidentally cured adheres to the valve member and interferes with the operation of the valve; this in comparison with conventional valve members.
    FIG. 1 shows the result of the cycle test.
    In a cycle test, canisters were stored upside down with gas at different temperatures so that the valve was in direct contact with the gas. On the x-axis, the different cycles and temperatures to which the buses were exposed are shown, for example
    Cycle 1:
    72 hours at 23 ° C 48 hours at -20 ° C 24 hours at 23 ° C 24 hours at 45 ° C
    Cycle 4 7 days at 23 ° C, bus upright. "
    After each step in the cycle, the gas loss is measured and indicated in g on the y-axis of FIG. 1.
    The cycle test was performed with a standard valve (A3105) with the valve member (valve stem) made of polyethylene filled with 33% glass fibers and with a valve fitted with a valve stem made of polyethylene filled with 33% basalt fibers (EXP3105-47).
    It can be seen from the results that valves with the basalt-filled valve stem (upper curve) show less gas loss than the standard valve filled with glass fibers (lower curve).
    权利要求:
    Claims (14)
    [1]

    Valve member, characterized in that the valve member is made with plastic Filling with basalt particles in an amount between 1% and 60% by weight.
    [2]
    2. Valve member according to claim 1 or 2, characterized in that a combinable agent has been added to the plastic.
    [3]
    Valve member according to any of claims 1 to 3, characterized in that the combinable agent is selected from the group consisting of maleic acid, a condensation product of maleic acid with an aliphatic, aromatic or heterocyclic polyol, an acrylamide maleimide or maleamic acid of a aliphatic, amino silanes, alkylsilanes, aromatic or heterocyclic polyamine and titanium dioxide.
    [4]
    Valve member according to any of claims 1 to 4, characterized in that the plastic is selected from the group consisting of polyolefins, polyesters and polyoxymethylene.
    [5]
    Valve member according to any of claims 1 to 5, characterized in that the polyolefins are selected from the group consisting of polyethylene, polypropylene, medium-density polyethylene, medium-density polypropylene, high-density polyethylene, high-density polypropylene and metallocene polyethylene.
    [6]
    Valve member according to any of claims 1 to 5, characterized in that the polyesters are selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate and polycarbonates.
    [7]
    Valve member according to any of claims 1 to 7, characterized in that the basalt particles are in the form of basalt fibers, basalt powder or basalt nanopowder.
    [8]
    Valve member according to one of Claims 1 to 8, characterized in that the basalt fibers have an average length between 0.1 and 12 mm, better between 1 and 8 mm and ideally between 2 and 6 mm.
    [9]
    Valve member according to one of claims 1 to 9, characterized by the fact that the basalt fibers have an average width / length ratio between 1:20 and 1: 500, better between 1:50 and 1: 250 and ideally between 1: 100 and 1: 200.
    [10]
    Valve member according to any of claims 1 to 10, characterized in that the basalt powder has an average particle length between 0.1 mm and 10 mm, more preferably between 1 and 8 mm and ideally between 3 and 6 mm.
    [11]
    Valve member according to any of claims 1 to 10, characterized in that the basalt nanopowder has an average particle size between 1 nm and 100 nm, more preferably between 10 nm and 50 nm and most preferably between 20 nm and 30 nm.
    [12]
    Valve member according to any of claims 1 to 12, characterized in that the valve member is made of plastic filled with basalt particles in an amount between 1% and 50% by weight, more preferably in an amount between 5 and 40% by weight and preferably in an amount between 10 and 35% by weight.
    [13]
    13. Distribution valve for foam products, in particular for polyurethane foam, consisting of a valve member that is movable relative to a seal, characterized in that the valve member is one according to one of claims 1 to 13.
    [14]
    14. Foam reservoir with a distribution valve, characterized in that the distribution valve is one according to claim 13 or 14.
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    JPH0526395A|1993-02-02|Internal pressure container
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    FR3065176B1|2017-04-13|2019-06-07|Aptar France Sas|DOSING VALVE FOR FLUID PRODUCT DISPENSER|
    法律状态:
    2019-03-06| FG| Patent granted|Effective date: 20150310 |
    2019-03-06| MM| Lapsed because of non-payment of the annual fee|Effective date: 20180630 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP13174212.4A|EP2818502B1|2013-06-28|2013-06-28|Valve member|
    EP131742124|2013-06-28|
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