WO2001032442A1 - Maitrise de formation de peau concernant des peintures - Google Patents

Maitrise de formation de peau concernant des peintures Download PDF

Info

Publication number
WO2001032442A1
WO2001032442A1 PCT/AU2000/001353 AU0001353W WO0132442A1 WO 2001032442 A1 WO2001032442 A1 WO 2001032442A1 AU 0001353 W AU0001353 W AU 0001353W WO 0132442 A1 WO0132442 A1 WO 0132442A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
coating system
coating
container according
paint
Prior art date
Application number
PCT/AU2000/001353
Other languages
English (en)
Other versions
WO2001032442A8 (fr
Inventor
Aziz George Haddad
Don Malek
Original Assignee
Viscount Plastics (Vic) Pty Ltd
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
Priority claimed from AUPQ3825A external-priority patent/AUPQ382599A0/en
Priority claimed from AUPQ4137A external-priority patent/AUPQ413799A0/en
Application filed by Viscount Plastics (Vic) Pty Ltd filed Critical Viscount Plastics (Vic) Pty Ltd
Priority to AU11205/01A priority Critical patent/AU760094B2/en
Priority to NZ518484A priority patent/NZ518484A/xx
Publication of WO2001032442A1 publication Critical patent/WO2001032442A1/fr
Publication of WO2001032442A8 publication Critical patent/WO2001032442A8/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/12—Paint cans; Brush holders; Containers for storing residual paint

Definitions

  • This invention relates to the control of the contamination of paint due to paint skinning.
  • the invention relates to a method of packaging paint to control contamination of paint in paint containers due to paint skinning.
  • the invention also relates to a paint container for packaging paint which minimises contamination of paint due to paint skinning.
  • a skin or thickening of the paint can occur on the underside of the container lid and on the sidewalls of the container, especially in the region above the top surface of the paint therein. Whilst not wishing to be bound by theory it is thought that this occurs due to the presence of a headspace in the paint container (i.e. a pocket of air in the top of the container). It is thought that in the headspace paint is splashed onto the container walls and lid during transit of the container followed by evaporation of the solvent leading to skin formation.
  • the skin formation is undesirable as the quality of the paint can be downgraded if the paint skin or thickened paint falls from the surface where it has formed into the main body of the paint. It has been found that paints in which this has happened are generally unsuitable for spray applications necessitating either filtration of the paint prior to use or vigorous agitation of the paint in an attempt to return the paint to a homogeneous state. It is generally found that neither of these techniques overcomes all problems caused by paint skinning and neither one is commercially acceptable to end users of the paint. It is therefore desirable to minimise the occurrence of paint skinning as well as to reduce the transfer of skin or thickened paint from the container walls or lid to the main body of the paint once the skin has formed.
  • the problem of paint skinning can be reduced or ameliorated to some extent by the provision of a coating on the surface of the paint container that contacts the paint. It is preferable that the coating has at least a partial affinity for both the materials used in the construction of the paint container and the components of the paint itself.
  • the present invention provides a container for water based paints, the container comprising: i) a container body moulded from plastics material; and ii) a container closure moulded from plastics material; wherein at least a part of the inner surface of either the container body or container closure has a coating applied thereto.
  • the container body is a pail and the container closure is a lid.
  • the coating is applied to at least a part of both the container body and the container closure. It is most preferable that the coating is applied to the entire inner surface of the container body and the container closure which may come into contact with the paint.
  • the present invention provides a method of packaging paint comprising the steps of: a) providing a paint container comprising: i) a container body moulded from plastics material; and ii) a container closure moulded from plastics material; b) applying a coating to at least part of the inner surface of at least one of the container body and the container closure; c) curing the coating; d) filling the container body to the required level with water based paint; and e) applying the container closure to the container body.
  • the container body is a pail and the container closure is a lid.
  • the coating is applied to at least a part of both the container body and the container closure. It is most preferable that the coating is applied to the entire inner surface of the container body and the container closure. Of course, as will be appreciated by a skilled addressee if only partial coating is done it is preferred that the parts of the container body and container closure that come into contact with the headspace are coated. This is because, as noted previously, the paint skinning is more often noted to occur in or around the areas of the paint container that contact the headspace.
  • the invention provides a method of producing a container for packaging paint comprising: a) providing a paint container comprising: i) a container body moulded from plastics material; ii) a container closure moulded from plastics material; b) applying a coating to at least a part of the inner surface of either the container closure or container body; and c) allowing the coating to cure.
  • the coating used in the present invention preferably, upon curing, has an affinity for the plastics material used in container manufacture as well as some affinity for the components in the water based paint. Whilst not wishing to be bound by theory it is thought that the attraction of the cured coating to both the plastics material and the components in the paint allow the coating to act as an interface between the plastics material and any paint skin thus formed. It is though that the presence of the interface inhibits the paint skin from falling back into the paint.
  • the containers of the present invention typically comprise a container body and a container closure.
  • the container body is preferably a pail and the container closure is preferably a lid.
  • Plastic pail-like containers are well known in the art. As will be appreciated by a person skilled in the art many plastic containers may be considered to be of a size and shape so as to be suitable for packaging of paint. In general, it is typically found that these containers are round however substantially square or rectangular containers are also envisaged for the containers of the present invention. In general, the containers of the invention can be any size with the preferred sizes ranging from as small as 250 ml up to greater than 50 litres.
  • the only limitation placed on the size of the container is a practical one as the containers are usually presented in such a way that a single container can be carried by a painter to a desired application point. Accordingly, therefore, whilst there is no size requirement or limitation placed on the containers of the present invention it is preferred that the containers are between 250 ml and 20 litres with 1 , 2, 4, 10, 12.5, 15 and 20 litre containers being preferred.
  • the container closure and the container lid can be related to each other in a number of ways.
  • a container closure can be fitted to the container body to achieve the desired closure of the container.
  • the two portions can be related via a screw thread, via lugs, or via a snap fit. In essence, it is immaterial how the container body and the container closure are related to each other for the purposes of working the present invention.
  • the components of the container used in the present invention are typically moulded from plastics material. Whilst it is typical that both the container body and the container lid are moulded from the same plastics material this need not be the case. It is preferred that the container body and container lid are moulded from polyethylene, polypropylene, high density polypropylene or a mixture thereof.
  • the Coating used is a coating that preferably has at least a partial affinity for both the plastics material and the paint components. A number of coatings have this functionality.
  • the coating used in the invention preferably comprises an epoxy resin and is most preferably provided as a two part epoxy coating system in which the parts are admixed shortly before application of the coating.
  • the epoxy resin is contained in the first part of said coating system.
  • the epoxy resin is preferably a resin produced by polymerisation of monomers of epichlorohydrin and Bisphenol A.
  • the epoxy resin may preferably represent between 50% and 90% (by weight) of the polymeric components in the first part of the coating system. It is preferably present at between 60-80%, more preferably 70-75%, most preferably 72% by weight of the polymeric components in the first part of the coating system.
  • the first part of the coating also preferably comprises a further polymeric material.
  • the further polymeric material in the first part of the coating is preferably a vinyl resin based on polymerisation of monomers such as vinyl acetate and vinyl chloride.
  • the vinyl resin preferably represents between 10 and 50%, more preferably 20-40%, even more preferably 25-35%, most preferably 28% of the polymeric components in the first part of the coating system.
  • the first part of the coating system also preferably comprises pigments and/or filler.
  • the pigments are preferably selected from the group consisting of appropriate grades of barium sulphate, amorphous silica, clay, zinc phosphate, talc and colouring pigments such as titanium dioxide. Coating grades of these materials would be of a quality that would be well understood by a skilled practitioner.
  • the pigments/fillers preferably represent between 10-50 wt.% of the solids, more preferably 20-40%, most preferably 30 wt.% of the total weight of solids in the first part of the coating.
  • the coating used in the present invention may contain a number components additional to the ones referred to above. Whilst there is no express limit on the solids level of the first part of the coating it is noted that the solids level of the coating prior to application should be optimised to ensure optimal handling conditions. Thus, for example, if the coating is formulated with too low a solids content it will be far too fluid and will not provide consistency in coating of the container leading to wastage of product. In contrast, if the solids content is too high the coating will not be sufficiently viscous to provide easy material handling and application. It is preferred that the solids content of the first part of the coating is within the range of 30-60 wt.%, more preferably 45-55 wt.%, most preferably about 48 wt.%.
  • the first part of the coating is typically treated with a curing agent (the second part of the coating system) and allowed to partially cure prior to its application to the surfaces of the container body and/or container closure.
  • the amount of second part of the coating used is typically equal to the amount of first part used although this is not required. (Indeed the relative amount of each material to be used will depend on the resin components and curing agent chosen).
  • the second component contains a curing agent which comprises a cross-linking agent.
  • a suitable cross-linking agent that may be used is a polyamide. In such cases the cross-linking of the first component of the coating occurs by combining it with the second component.
  • the second component preferably contains an organic solvent as the liquid phase.
  • the polyamide resin used in such cases is preferably the amine terminated reaction product of one or more polyamines with one or more polyfunctional carboxylic acids.
  • the organic solvent or liquid phase used for the second component is preferably selected from the group consisting of aromatic hydrocarbons, aliphatic alcohols, ether esters and ether alcohols.
  • the first component of the coating is typically allowed to react with the second component containing the curing agent (i.e. allowed to partially cure) for a period of time prior to application of the coating onto the container body and/or container closure.
  • the appropriate period of time the material is allowed to cure prior to application will vary depending on the curing agent chosen and the exact coating composition. Thus for example the time of application will be delayed until the coating has reached the desired consistency for application.
  • the coating may be applied by any conventional technique employed in the art.
  • the coating may, for example, be painted or sprayed onto the surfaces of the body and closure of the container. Application by spraying is preferred as this is typically found to be most commercially acceptable and provides the most complete and consistent coverage of the coating onto the surfaces of the container body and container closure.
  • the coating is allowed to cure completely. This can be done in a number of ways well known in the art.
  • the coating may be cured, for example, by being allowed to air cure at ambient temperature until dry. Alternatively, various means can be employed to increase the rate of curing such as air flow drying, exposure to elevated temperatures and the like. Curing of the coating can also occur by exposure to UV radiation.
  • the coating is typically applied so that when cured it preferably has a thickness of at least 5 micron. It is further preferable that the entire inner surface of the container body and container closure are covered with the coating.
  • the method of production of the container for packaging paint can also, of course, be incorporated into a continuous method for packaging paint.
  • the containers discussed hereinbefore could be produced by a packaging manufacturer and then on-sold to a paint manufacturer (it is expected that this will be the case)
  • the procedure for producing the containers can also be incorporated as part of a continuous method for packaging paint in a paint factory.
  • the present invention provides method of packaging paint comprising the steps of: a) providing a paint container comprising: i) a container body moulded from plastics material; and ii) a container closure moulded from plastics material; b) applying a coating to at least part of the inner surface of either the container body and the container closure; c) allowing the coating to cure; d) filling the container body to the required level with water based paint; e) applying the container closure to the container body.
  • a suitable plastic container is treated in a continuous fashion with a coating as discussed hereinbefore to form the packaging container with coating applied to at least a portion of the inner surface of either the container body or container closure.
  • the coating is allowed to cure prior to the container being filled to the appropriate level with paint and the container closure being placed thereon.
  • the invention provides a method of producing a container for packaging paint comprising: a) providing a paint container comprising: i) a container body moulded from plastics material; ii) a container closure moulded from plastics material; b) applying a coating to at least a part of the inner surface of either the container closure or container body; and c) allowing the coating to cure.
  • paint is to be understood to include various surface coating products including paint, varnish, stain, inks and other surface coating materials.
  • a pail and lid were injection moulded from polypropylene and/or high density polypropylene.
  • the pails had nominal capacities in the range 1 to 20 litres.
  • the inner surfaces of the pail and lid were painted with a coating known as EP40* which had been admixed with an epoxy coating curing agent EP401 * in a 1 :1 ratio and allowed to partially cure for 30 minutes, (both EP40 and EP401 are available from AM Coatings Pty. Ltd. of Braeside, Victoria).
  • the coating was permitted to air dry for at least 1 hour and had a thickness of at least 5 microns when dry. It is envisaged that in commercial production the coating would be sprayed onto the inner surfaces of the pail and lid and then cured using a dryer or the like.
  • the container was filled with paint to its normal capacity and the lid closed on the container.
  • the paint was a water based paint such as an acrylic paint of trade grade supplied by Dulux Australia.
  • the container was then moved randomly so as to simulate movement which would normally occur during manufacture and distribution. After about one week the lid was removed and inspected. It was found that a relatively thin skin had formed on the underside of the lid and on the exposed surfaces inside the pail above the level of the paint. The skin, however, adhered to the underside of the lid and the said exposed surfaces and there was little or no evidence of the skin falling back into the main body of the paint.
  • EP40 is a product which contains an epoxy resin, based on polymerisation of monomers including epichlorhydrin and Bisphenol A, and a vinyl resin, based on polymerisation of monomers including vinyl acetate and vinyl chloride.
  • the resins are dissolved in organic solvents selected from the group consisting of aliphatic ketones, aromatic hydrocarbons and aliphatic alcohols.
  • the pigments in the product may include appropriate grades of barium sulphate, amorphous silica, clay, zinc phosphate, talc and colouring pigments including titanium dioxide.
  • the product may also include additives present at less than 1 % of total formula weight.
  • EP401 is a product which consists of a solution of a polyamide resin in an organic solvent such as aromatic hydrocarbons, aliphatic alcohols, ether esters and ether alcohols.
  • the polyamide resin is the amine-terminated reaction product of polyamines and polyfunctional carboxylic acids.

Landscapes

  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Paints Or Removers (AREA)
  • Packages (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un récipient destiné à des peintures à l'eau, comprenant i) un logement de récipient moulé à partir de matériaux plastiques, et ii) une fermeture de récipient moulée à partir de matériaux plastiques, dans lesquels au moins une partie de la surface intérieure du logement de récipient, ou de la fermeture de récipient, comporte un revêtement destiné à maîtriser la contamination de la peinture par réduction de formation de peau ou d'épaississement de la peinture tombant du revêtement dans la masse de peinture. Le revêtement peut être appliqué lors du procédé de fabrication du récipient ou lors du processus d'emballage de la peinture dans le récipient.
PCT/AU2000/001353 1999-11-03 2000-11-03 Maitrise de formation de peau concernant des peintures WO2001032442A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU11205/01A AU760094B2 (en) 1999-11-03 2000-11-03 Control of paint skinning
NZ518484A NZ518484A (en) 1999-11-03 2000-11-03 Control of paint skinning

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPQ3825A AUPQ382599A0 (en) 1999-11-03 1999-11-03 Control of paint skinning
AUPQ3825 1999-11-03
AUPQ4137 1999-11-18
AUPQ4137A AUPQ413799A0 (en) 1999-11-18 1999-11-18 Control of paint skinning

Publications (2)

Publication Number Publication Date
WO2001032442A1 true WO2001032442A1 (fr) 2001-05-10
WO2001032442A8 WO2001032442A8 (fr) 2002-06-13

Family

ID=25646192

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/001353 WO2001032442A1 (fr) 1999-11-03 2000-11-03 Maitrise de formation de peau concernant des peintures

Country Status (2)

Country Link
NZ (1) NZ518484A (fr)
WO (1) WO2001032442A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002094582A1 (fr) * 2001-05-25 2002-11-28 Superfos Packaging A/S Recipient ou couvercle en materiau thermoplastique et son procede de traitement
EP1780047A1 (fr) * 2005-10-27 2007-05-02 Emballator Lagan Plast Aktiebolag Procédé de fabrication d'un composant d'un paquet, et composant ainsi produit
WO2007070971A1 (fr) * 2005-12-21 2007-06-28 Orica Australia Pty Ltd Revetement interne empechant la formation de peaux pour contenants de composition
NL1039400C2 (nl) * 2012-02-23 2013-08-26 Naber Beheer B V Verpakking voor een visceuze vloeistof en werkwijze voor het vervaardigen van een dergelijke verpakking.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223008A (en) * 1988-08-26 1990-03-28 Reed Packaging Ltd Container closures
WO1991005714A1 (fr) * 1989-10-23 1991-05-02 Rhone-Poulenc Agriculture Limited Ameliorations relatives aux recipients
DE4126964A1 (de) * 1991-08-14 1993-02-18 Spies Lutz Volker Umweltfreundliches behaeltersystem fuer lacke, farben und dergleichen, sowie verfahren zur wiederverwertung des behaeltersystems
EP0575267A1 (fr) * 1992-06-16 1993-12-22 Pechiney Emballage Alimentaire Procédé de fermeture étanche d'un récipient non métallique avec un couvercle non métallique pelable et réutilisable
EP0579106A1 (fr) * 1992-07-11 1994-01-19 Karsten Gall Récipient pour liquides ou pour substances similaires
BE1006336A4 (fr) * 1992-11-06 1994-07-26 Copee Alain Bac pour peinture, procede et stratifie pour sa production.
WO1997005035A1 (fr) * 1995-07-28 1997-02-13 Henkel Nederland B.V. Recipient reutilisable pourvu d'un revetement protecteur et procede de recuperation correspondant
WO2000027725A1 (fr) * 1998-11-10 2000-05-18 Resene Paints Limited Procede de conditionnement de preparations a base de solvant ou d'eau en vue d'une reduction de l'usure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223008A (en) * 1988-08-26 1990-03-28 Reed Packaging Ltd Container closures
WO1991005714A1 (fr) * 1989-10-23 1991-05-02 Rhone-Poulenc Agriculture Limited Ameliorations relatives aux recipients
DE4126964A1 (de) * 1991-08-14 1993-02-18 Spies Lutz Volker Umweltfreundliches behaeltersystem fuer lacke, farben und dergleichen, sowie verfahren zur wiederverwertung des behaeltersystems
EP0575267A1 (fr) * 1992-06-16 1993-12-22 Pechiney Emballage Alimentaire Procédé de fermeture étanche d'un récipient non métallique avec un couvercle non métallique pelable et réutilisable
EP0579106A1 (fr) * 1992-07-11 1994-01-19 Karsten Gall Récipient pour liquides ou pour substances similaires
BE1006336A4 (fr) * 1992-11-06 1994-07-26 Copee Alain Bac pour peinture, procede et stratifie pour sa production.
WO1997005035A1 (fr) * 1995-07-28 1997-02-13 Henkel Nederland B.V. Recipient reutilisable pourvu d'un revetement protecteur et procede de recuperation correspondant
WO2000027725A1 (fr) * 1998-11-10 2000-05-18 Resene Paints Limited Procede de conditionnement de preparations a base de solvant ou d'eau en vue d'une reduction de l'usure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class P43, AN 1993-059677/08 *
DATABASE WPI Derwent World Patents Index; Class P73, AN 1994-286078/36 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002094582A1 (fr) * 2001-05-25 2002-11-28 Superfos Packaging A/S Recipient ou couvercle en materiau thermoplastique et son procede de traitement
AU2002316793B2 (en) * 2001-05-25 2005-06-16 Superfos Packaging A/S A container or a lid of thermoplastic material and a method for treating them
EP1780047A1 (fr) * 2005-10-27 2007-05-02 Emballator Lagan Plast Aktiebolag Procédé de fabrication d'un composant d'un paquet, et composant ainsi produit
WO2007070971A1 (fr) * 2005-12-21 2007-06-28 Orica Australia Pty Ltd Revetement interne empechant la formation de peaux pour contenants de composition
AU2006326859B2 (en) * 2005-12-21 2011-09-15 Duluxgroup (Australia) Pty Ltd Internal anti-skinning coating of composition containers
NL1039400C2 (nl) * 2012-02-23 2013-08-26 Naber Beheer B V Verpakking voor een visceuze vloeistof en werkwijze voor het vervaardigen van een dergelijke verpakking.

Also Published As

Publication number Publication date
NZ518484A (en) 2002-09-27
WO2001032442A8 (fr) 2002-06-13

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