• 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 invention relates to a composition for joining of polyvinylchloride (PVC) components, the composition comprising 50-95 wt% 1-butylpyrrolidin-2-one and 5-40 wt% polyvinylchloride and/or polyvinylacetate. The invention further relates to a method of joining of polyvinylchloride (PVC) components using the composition.
    公开号:SE1650909A1
    申请号:SE1650909
    申请日:2016-06-23
    公开日:2017-12-24
    发明作者:GUSTAFSSON Dick；Högstedt Olof；Lindén Anders
    申请人:Ohla Plast & Färgteknik Ab；
    IPC主号:
    专利说明:

    P41602213SE002016-06-23 1 Composition and method for joining of PVC components TECHNICAL FIELDThis invention relates to a composition for joining of polyvinylchloride (PVC) components, thecomposition comprising a solvent and polyvinylchloride and/or polyvinylacetate. lt further relates to a method ofjoining of polyvinylchloride (PVC) components using the composition.
    BACKGROUND ART Joining of polyvinylchloride (PVC) components, such as floor and wall panels, are commonlycarried out by using a liquid composition comprising a solvent capable of dissolving the PVCand allowing the PVC components to fuse together over time while the solvent evaporates.Such a liquid composition is often called a cold weld liquid and the corresponding joining technique is called cold welding or chemical welding.
    A commonly used industrial solvent for joining PVC floor panels is the organic compoundtetrahydrofuran (THF). This solvent is very suitable for the purpose in question but has someserious disadvantages. THF has recently been classified as ”Suspected of causing cancer”.Products containing THF as solvent must thus be provided with a warning label due to thepotential cancerous effect. For the one-time user the potential negative effects of THF maynot be alarming, but for professionals coming into contact with the solvent every day there isa great health risk. The use of THF and similar PVC solvents available on the market requiresthe user to wear a mask and to work only in environments with intensive ventilation. Such requirements complicate the work for professionals.
    Another problem associated with THF and similar solvents is their flammability, which poses arisk of explosion and fire. Tools that may give rise to sparks can therefore not be used together with such solvents. Moreover, these solvents are subject to transportation restrictions.
    Because of the toxicity and flammability of THF, some alternatives have been proposed in the past. DE4142732 A1 discloses a cold weld composition using acetone as solvent. Another 2alternative is given in FR2804456 A1 teaching that plasticized PVC panels can be joined by using water-based polyurethane glue.
    None of these alternatives have reached any commercial success, possibly because acetone,like THF, is toxic, flammable and evaporates readily, and it is also a poorer solvent for PVCthan THF, and because polyurethane glue requires a long time to cure and has poor binding properties for PVC.
    Another common method ofjoining PVC components is hot welding, i.e. the components aremelted instead of being dissolved using a solvent. However, conventional hot melting isgenerally more complicated than using solvents; particular welding equipment is needed andit requires great craftsmanship to produce good looking joints. Moreover, hot weldinggenerates corrosive and toxic gases, and it cannot be used for joining foamed PVC COmpOHeHtS.
    For the above reasons, there is a need for improvements in the field of joining PVC components together.
    SUMMARY OF THE INVENTIONAn object of the invention is to overcome the problems outlined above; namely to provide foran efficient and qualitative way ofjoining PVC components without the use of toxic solvents or complicated equipment.
    The invention concerns a composition for joining polyvinylchloride (PVC) components, thecomposition comprising 50-95 wt% (weight percent) 1-butylpyrrolidin-2-one and 5-40 wt% polyvinylchloride (PVC) and/or polyvinylacetate (PVA). 1-butylpyrrolidin-2-one is a non-toxic and inflammable solvent that, when mixed with acertain amount of PVC and/or PVA, is very useful for joining PVC components, in particularfloor panels but also e.g. pipe sections or for fitting PVC window frames. An effect of the invention is thus that PVC components can be joined together in an efficient and non- 3complicated way without posing a health risk for the person carrying out the work and without the risk for explosions and fire during application or transportation. lt has been found that 1-butylpyrrolidin-2-one, which is a low-volatile non-toxic solvent withhigh polarity, provides good quality joints with surprisingly short binding time. I/|oreover, thelow volatility provides the possibility to make the cold welding process more exact andreproducible. An excess of welding liquid/composition can be used in the process, since it can be wiped off smoothly and easily without damaging the product surface.
    Compared to the known solvent alternative acetone, 1-butylpyrrolidin-2-one has theadvantages of being less toxic, enabling the possibility of achieving improved joints (reproducible joints with better appearance), and being easier to handle (inflammable). 1-butylpyrrolidin-2-one is known as such but the use of this compound in a cold weldcomposition for joining of PVC components is believed to be novel. 1-butylpyrrolidin-2-one isalso known under e.g. the following names: 1-Butyl-2-pyrrolidinone, N-Butylpyrrolidone and N-Butylpyrrolidinone. The chemical formulation is C8H15NO.
    The term ”PVC components” refer to components, typically floor panels, which aresubstantially made of PVC. lt is not necessary that these components are made purely of PVC.Many PVC components contain, for instance, around 10 wt% fillers, plasticizers or other additives, and around 10 wt% polyvinylacetate.
    The composition comprises 5-40 wt% polyvinylchloride and/or polyvinylacetate, which willmix with the PVC/PVA polymers of the PVC component and act as filler in the joint while the 1-butylpyrrolidin-2-one diffuses into the PVC components. The PVA/PVC of the composition thereby contributes to a better bond.
    The concentration of PVC/PVA in the composition influences the viscosity of the composition;the higher the PVC/PVA concentration, the higher the viscosity. Different applications may require different viscosity. For instance, if there is a large gap in the joint to be sealed, and for 4non-horizontal applications, such as walls or inclined floors, a more viscous composition is needed.
    The composition may comprise a mix of PVC and PVA.
    Preferably, the composition comprises 70-85% 1-butylpyrrolidin-2-one and 8-20% polyvinylchloride.
    The composition is produced by adding PVC or PVA in powder or granulate form to liquid 1-butylpyrrolidin-2-one and mixing the components to dissolve at least most of the PVC or PVA.After a few days, preferably 1-2 days, the additives are added to the mix. The composition is yet again stirred to make sure all PVC or PVA has dissolved. ln an embodiment of the invention the composition comprises 0.1-20 wt%, preferably 3-10wt%, additives in the form of one or several of the following compounds: stabilizers,plasticizers, pigments and/or matting agents. Such compounds are known as such. Stabilizersare added to the composition to minimize the effect of UV-radiation on the joints. UV-radiation affects the colour of the joint as it yellows the PVC or PVA. The plasticizer promotesplasticity and flexibility in the joint. The amount of additives in the composition preferablyreflects the amount of additives in the PVC components that are being joined. A PVC floorcomponent that has a high level of plasticizers is preferablyjoined by using a composition withsimilar amount of plasticizers such that the joint becomes as elastic as the floor components.Pigments are added to give the joint a desired colour, for example the same colour as the PVC components to be joined. Matting agents are added to provide the desired matting effect.ln an embodiment of the invention, the composition comprises additives in the followingamounts: <5% stabilizers and/or <5% plasticizers and/or 0-10% pigments and/or 0-5% matting agents. ln an embodiment ofthe invention, the composition comprises 4-8 wt% additives. 5The invention also concerns a method for joining polyvinylchloride (PVC) components,wherein the method comprises the steps of: applying a composition ofthe above type onto atleast a first of said components at a location intended to form part of a joint; and bringing into contact the first PVC component with a second PVC component at said location.
    The method may further comprise pressing the first and second polyvinylchloride componenttogether at the intended joint, allowing superfluous composition to protrude from the jointwhen the first and second PVC component are brought into contact with each other; and allowing the first and second PVC components to fuse.
    The method may also comprise wiping away protruding superfluous composition along thejoint in order to achieve a smooth, non-bulging joint between the PVC components. Due tothe characteristics of the composition it is easy to wipe off. lt is non-sticky and does notimmediately cure as compared to compositions with THF which are sticky and cure faster.Compositions with THF have a tendency to create bulges along the joint. ln contrast to THF-based compositions, the present composition does not require the use of masking tape to avoid overspill as the composition can easily be wiped off with for example a putty knife.
    The composition dissolves the surface of the PVC components at the location of the joint,typically the edges of adjacent floor panels or mating parts of pipe sections, and allows thecomponents to fuse together along the contacting surfaces such as to achieve seam sealing.The fact that 1-butylpyrrolidin-2-one is polar is believed to contribute to the benefits, becauseit mixes well with PVC which is also polar. After application, the 1-butylpyrrolidin-2-one of thecomposition will diffuse into the edges of the PVC components and thereby provide great adhesion effects.
    The fusion of the PVC components takes about 6-24 hours, so the method preferablycomprises the step of allowing the components to bond for at least 24 hours. Full joint strength is achieved after about 3-7 days.
    By using the composition disclosed herein the method allows the joint to be cold seam welded by bonding the said first and second PVC component together.
    According to one aspect of the invention the composition is applied to a first surface of the first polyvinylchloride component at the location of intended joint.
    According to one aspect of the invention the composition is applied by means of an applicator provided with a nozzle through which the composition is pressed out.
    The polyvinylchloride components to be joined may be floor covering sections, pipe sections, window frame sections or other PVC components than can be joined by cold welding.
    The invention also concerns a use of the above composition as a joining agent for joining of a first polyvinylchloride component and a second polyvinylchloride component.
    DETAILED DESCRIPTIONln the following an embodiment of the invention is shown and described, simply by way of illustration of one mode of carrying out the invention.
    According to one example ofthe invention the composition comprises:80 wt% 1-butylpyrrolidin-2-one 14 wt% polyvinylchloride 4,4 wt% plasticizers 0,3 wt% stabilizers 1,3 wt% matting agent This example of the composition may be used in a method for joining two floor coveringsections. ln such an example of the invention, the method comprises placing two PVC floorsections on the underlying, original floor and gluing them to that floor. The PVC floor sectionsare positioned so that their edges overlap. The method further comprises providing a cutthrough the overlap, the cut extending along the entire edge of the overlap. The cut away partof the upper section is then removed. Thereafter, the upper PVC floor section is lifted to revealthe part cut away from the bottom PVC section, which is likewise subsequently removed. The composition according to the invention is added to the edge of the bottom floor section by 7means of a nozzle at the location intended to form the joint. The lifted upper floor coveringsection is folded back down into position so that the edge of the bottom floor covering sectionand the edge of the upper floor covering section align at the location of the intended joint.
    The composition is allowed to protrude from the joint between the edges. The superfluous composition is wiped away so as to form a smooth joint.
    权利要求:
    Claims (14)
    [1] 1. Composition for joining of polyvinylchloride (PVC) components, the compositioncomprising 50-95 wt% 1-butylpyrrolidin-2-one and 5-40 wt% polyvinylchloride and/or polyvinylacetate.
    [2] 2. Composition according to claim 1, wherein the 1-butylpyrrolidin-2-one together withthe polyvinylchloride and/or polyvinylacetate constitute at least 90 % of the total weight of the composition.
    [3] 3. Composition according to any one of claims 1 or 2, wherein the composition comprises 0.1-20 wt%, preferably 3-10 wt%, additives.
    [4] 4. Composition according to claim 3, wherein the additives comprises one or several of the following compounds: stabilizers, plasticizers, pigments and/or matting agents.
    [5] 5. Composition according to claim 4, wherein the composition comprises additives inthe following amounts: <5 wt% stabilizers and/or <5 wt% plasticizers and/or 0-10 wt% pigments and/or 0-5 wt% matting agents.
    [6] 6. Composition according to any one of the above claims, wherein the compositioncomprises 70-85 wt% 1-butylpyrrolidin-2-one and 8-20 wt% polyvinylchloride and/or polyvinylacetate.
    [7] 7. Composition according to claim 3, wherein the composition comprises 4-8 wt% additives.
    [8] 8. Composition according to any one of the above claims wherein the compositioncomprises 80 wt% 1-butylpyrrolidin-2-one, 14 wt% polyvinylchloride, 4,4 wt% plasticizer, 0,3 wt% stabilizer and 1,3 wt% matting agent.
    [9] 9. Method for joining of polyvinylchloride (PVC) components, wherein the method comprises the steps of:
    [10] 10.
    [11] 11.
    [12] 12.
    [13] 13.
    [14] 14. 9- applying a composition according to any one of claims 1-8 onto at least a first ofsaid components at a location intended to form part of a joint; and- bringing into contact the first PVC component with a second PVC component at said location. Method according to claim 9, wherein the method further comprises one or several of the following steps: - pressing said first and second polyvinylchloride component together at theintended joint; - allowing superfluous composition to protrude from the joint when the first and second PVC component are brought into contact. Method according to claim 10, wherein the method further comprises the followingstep:- wiping away the superfluous composition protruding from the joint by wiping along the joint. Method according to any one of claims 9 - 11, wherein the composition is applied bymeans of an applicator provided with a nozzle, through which the composition is pressed out. Method according to any one of claims 9 - 12, wherein the polyvinylchloride components are floor covering sections. Use of the composition according to any one of claims 1-8 as a joining agent for joining of a first and a second polyvinylchloride component.
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    同族专利:
    公开号 | 公开日
    EP3475062A4|2020-01-29|
    WO2017222438A1|2017-12-28|
    SE540725C2|2018-10-23|
    EP3475062A1|2019-05-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2934133A1|1979-08-23|1981-03-26|Kurt Kunze GmH & Co KG, 4300 Essen|Jointing PVC sheets into continuous floor covering - where underside of temporarily taped joint is welded cooled and smoothed|
    DK153684C|1982-12-01|1990-02-26|Heimann F & Co As|PROCEDURE FOR PREPARING A LIMITED JOINT BETWEEN SURFACES OF SUBSTANCES MADE BY WATER INSOLuble, SYNTHETIC ORGANIC POLYMERS|
    DE3512537A1|1985-04-06|1986-10-16|Henkel KGaA, 4000 Düsseldorf|MEANS FOR GLUING MOLDED PVC MOLDED PARTS|
    EP2404953A1|2010-07-08|2012-01-11|Nordcoll A/S|Solvent based glue composition|
    BE1020269A5|2012-01-17|2013-07-02|Taminco|USE OF REPLACEMENT SOLVENTS FOR N-METHYLPYRROLIDONE .|
    US20140020828A1|2012-07-18|2014-01-23|Oatey Company|Fast Curing CPVC Solvent Cement|
    US20160115358A1|2014-10-23|2016-04-28|Ips, Corporation -Weld-On Division|Solvent cement for bonding thermoplastic resin articles|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1650909A|SE540725C2|2016-06-23|2016-06-23|Use of composition comprising polyvinyl chloride dissolved in1-bytylpyrrolidin-2-one for joining floor panels made of po lyvinyl chloride|SE1650909A| SE540725C2|2016-06-23|2016-06-23|Use of composition comprising polyvinyl chloride dissolved in1-bytylpyrrolidin-2-one for joining floor panels made of po lyvinyl chloride|
    PCT/SE2017/050432| WO2017222438A1|2016-06-23|2017-05-04|Composition and method for joining of pvc components|
    EP17815798.8A| EP3475062A4|2016-06-23|2017-05-04|Composition and method for joining of pvc components|
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