WO2017122050A1 - Composition de revêtement anti-coloration pour article en porcelaine - Google Patents

Composition de revêtement anti-coloration pour article en porcelaine Download PDF

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Publication number
WO2017122050A1
WO2017122050A1 PCT/IB2016/050198 IB2016050198W WO2017122050A1 WO 2017122050 A1 WO2017122050 A1 WO 2017122050A1 IB 2016050198 W IB2016050198 W IB 2016050198W WO 2017122050 A1 WO2017122050 A1 WO 2017122050A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
weight
relative
total weight
coating
Prior art date
Application number
PCT/IB2016/050198
Other languages
English (en)
Inventor
Mehrdad MAZLOOMI NIA
Amir MODIRI
Mir Abbas BEHBAHANI
Original Assignee
Taghdis Porcelain Company
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 Taghdis Porcelain Company filed Critical Taghdis Porcelain Company
Priority to PCT/IB2016/050198 priority Critical patent/WO2017122050A1/fr
Priority to EP16703361.2A priority patent/EP3405539A1/fr
Publication of WO2017122050A1 publication Critical patent/WO2017122050A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/022—Emulsions, e.g. oil in water
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups

Definitions

  • the present invention concerns coating compositions for porcelain ware, in particular, anti-stain coating compositions for porcelain tableware, and a process for preparing thereof.
  • the present invention also concerns a process for coating a porcelain ware, in particular a porcelain tableware selected among plates, bowls, cups, saucers, pitchers, teapots, coffeepots, mugs.
  • the invention further relates to a coated porcelain ware, in particular, a coated porcelain tableware selected among plates, bowls, cups, saucers, pitchers, teapots, coffeepots, mugs, comprising at least one layer of a coating composition according to the invention.
  • Porcelain tableware is highly appreciated by people and can add value to simple everyday meals and formal dinners, making them enjoyable and unique. Thus, it is important to have perfect tableware.
  • Stains and coloration of porcelain tableware caused by, for example, food, sauces, or drinks such as tea or coffee may irreversibly damage the porcelain tableware and modify its appearance.
  • the classical cleaning techniques like washing with dishwashing products and water may prove to be inadequate in removing the coloration or the stains from the porcelain. Removal of the coloration and stains by abrasive potentially toxic chemicals is not advisable as it may damage the porcelain and be food unsafe.
  • the present invention addresses this need through the provision of a coating composition
  • a coating composition comprising:
  • the coating of the invention is a food safe and food grade coating that can be used on porcelain tableware such as plates, bowls, cups, saucers, pitchers, teapots, coffeepots, mugs etc. without altering the porcelain.
  • the coating composition of the invention adds a completely new property to the porcelain ware onto which it is applied: it prevents the adhesion of stains and coloration to the porcelain ware (anti-stain property). Consequently, rinsing with water only or, if desired, washing by water and a mild dishwashing product will remove easily and efficiently coloration and stains caused by drinks, food, sauces etc. from the surface of a porcelain ware coated with a composition according to the invention.
  • the coating composition of the invention is further capable of preventing the adhesion of grease on the coated surfaces of the porcelain.
  • the coating composition of the invention adheres strongly to the surface of the porcelain surface and ensures a durable coating of the porcelain ware.
  • the coating composition of the invention is particularly adapted for porcelain ware, in particular, porcelain tableware such as plates, bowls, cups, saucers, pitchers, teapots, mugs etc., it may also be used for any porcelain surface where staining and coloration and food safety is an issue.
  • the amount of aminoethylaminoisobutylmethylsiloxane, dimethylsiloxane copolymer in the coating composition of the invention is 3 to 7% by weight, preferably, 3.5 to 6.75% by weight, relative to the total weight of the composition.
  • the amount of decamethylcyclopentasiloxane in the coating composition is 0.03 to 0.4% by weight, preferably, 0.05 to 0.38% by weight, relative to the total weight of the composition.
  • the amount of octamethyicyclotetrasiioxane in the coating composition is 0.15 to 0.85% by weight, preferably, 0.25 to 0.75% by weight, relative to the total weight of the composition.
  • the amount of the food grade alcohol selected from isopropanol or ethanol is 8 to 28% by weight, preferably, 10 to 25% by weight, relative to the total weight of the composition.
  • the food grade alcohol is preferably isopropanol.
  • the amount of acetic acid in the coating composition of the invention is 0.1 to 0.7%, preferably, 0.1 to 0.4% by weight, relative to the total weight of the composition.
  • the amount of water present in the coating compositions of the invention is 70 to 85% by weigh, preferably, 75 to 82% by weight relative to the total weight of the composition.
  • the coating composition comprises:
  • the coating composition according to the invention may further contain one or more additional components selected from known food safe and food grade additives for porcelain coating compositions.
  • additional components selected from known food safe and food grade additives for porcelain coating compositions. Examples of such additives are:
  • any of the above additive types may be used alone or in admixture with each other and with other additives, if desired. Where one or more additives are present, the total amount of said additive(s) are 0.01 % by weight, relative to the total weight of the composition. Such additives are well known by a person skilled in the art.
  • the coating composition of the invention may be an ail-over coating meaning that it can completely cover the porcelain ware, or it may be partial meaning that it can only cover specific parts of the porcelain ware, for example the interior surface.
  • the coating composition of the invention is in the form of an aqueous colloidal emulsion in which the dispersed-phase particles have a diameter of less than 600 nm, preferably between I and 500 nm, more preferably between 20 to 450 nm as shown in Figures 2 and 3.
  • the present invention provides a process for the preparation of a coating composition according to the present invention, comprising the steps of:
  • step (iii) forming an aqueous emulsion by adding alcohol, acetic acid and water to the viscous liquid obtained in step (ii).
  • step (i) other quaternary ammonium hydroxides may be used.
  • Non limiting examples are tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, benzyl trimethylammonium hydroxide, benzyl triethylammomum hydroxide.
  • the viscous liquid obtained in step (ii) has a viscosity of generally less than 10
  • Pa.s (10,000 cP), for example less than 5 Pa.s (5,000 cP), at 25°C.
  • the dispersed-phase particles of the resulting emulsion have a diameter of less than 600 nm, preferably between 1 and 500 nm, more preferably between 20 to 450 nm.
  • the coating composition of the invention may be applied onto the porcelain ware during or after its production. According to an embodiment, the coating composition is applied to the porcelain ware after it's manufacture.
  • the present invention provides a process for coating a porcelain ware, in particular a porcelain tableware selected among plates, bowls, cups, saucers, pitchers, teapots, coffeepots, mugs, comprising the steps of:
  • the surface of the porcelain ware onto which the coating is to be applied may optionally be cleaned, for example, with a dry or wet cloth, or with an alcoholic solution such as an alcoholic solution of i sopropanol 99%,
  • the application of the anti-stain coating composition of the invention may be done by any method known by a person skilled in the art and appropriate for coating of porcelain ware. The method is also selected taking into account the surface to be coated.
  • the anti-stain coating composition of the invention can be applied uniformly onto the porcelain ware using a brush or a soft cloth.
  • the composition may also be applied by conventional spraying methods.
  • Spraying can be done for example without the use of any air, only by using the pressure of the composition alone.
  • An adapted pump pressurises the composition and forces a defined quantity of composition through a nozzle aperture at up to 25 MPa. During this process, the composition is diffused into a finely atomised spray jet.
  • Spraying can also be done using a compressed air-driven spray where at the outlet of the nozzle, the composition is mixed with air. This atomizes the composition in very fine droplets to produce an extremely good spray pattern.
  • a still another spraying method can be a low- pressure spraying using a high volume of air and low air pressure up to 0.07 bar.
  • the porcelain ware may also be coated by dip coating. Dip coating allows a complete coating of the porcelain ware.
  • the porcelain ware is immersed in the coating composition at a constant speed and remains therein for 1 to 20 minutes for example.
  • the porcelain ware is then pulled up at a constant speed. The speed determines the thickness of the coating desired. Faster withdrawal gives thicker coating.
  • the coating layer deposits itself on the porcelain ware while it is pulled up. Excess composition will drain from the surface of the porcelain ware.
  • the coating is a thin layer of 50 nanometers or less.
  • the coating is oven cured for 1 to 30 minutes, for example for 1 to 15 minutes, for example for 1 to 5 minutes, at a temperature ranging from 80 to 250°C, for example 100 to 200°C. Curing removes solvents and water present in the coating composition, and stabilizes the coating layer.
  • one or more layers of the coating composition of the invention can be applied over the substrate with each layer being separately cured.
  • the coating process of the invention allows a complete coating meaning that the composition covers the porcelain ware on all of its surfaces, or a partial coating meaning that it can only cover specific parts of the porcelain ware, for example the interior surface.
  • the invention provides a coated porcelain ware, in particular, a coated porcelain tableware selected among plates, bowls, cups, saucers, pitchers, teapots, coffeepots, mugs, comprising at least one layer of a coating composition according to the invention.
  • Figure 1 represents the Fourier Transform Spectroscopy (FTIR) analysis of a coating composition prepared according to Example 1.
  • FTIR Fourier Transform Spectroscopy
  • Figures 2 and 3 represent the Transmission Electron Microscopy (TEM) image of a coating composition according to Example 1 where the diameter of the particles is between 20 to 450 nm.
  • TEM Transmission Electron Microscopy
  • Figure 4 shows the effectiveness of the anti-staining composition of the invention : when dipped into a bath of porcelain paint, the tile coated with the anti-stain composition of the invention does not change color while the non treated tile becomes green.
  • Gel permeation chromatography of the product revealed the presence of 85 wt.% of linear polysiloxanes and 15 wt.% cyclosiloxanes.
  • the product had a viscosity of 2570 cP at 25°C measured with an Ubbeiohde viscosimeter in accordance with ASTM D 445-46T.
  • An aqueous emulsion was next prepared by adding 2800 to 7000 g of isopropanol and 28 to 56 g of acetic acid to 210 g of the product obtained previously followed by the addition of 1 5000 g of distilled water. 28 kg of a coating composition according to the invention is obtained in this manner.
  • Figure 1 shows a FTIR spectrum of the coating composition prepared according to Example 1.
  • a solution/slurry was next prepared by adding 1500 to 3750 g of isopropanol and 15 to 30 g of acetic acid to 210 g of the product obtained previously followed by the addition of 15000 g of distilled water. 15 kg of a coating composition according to the invention is obtained in this manner.
  • a composition prepared according to example I was applied to the interior surface of a porcelain cup with a soft cloth with for approximately 5 minutes. The cup was then oven cured at a temperature of 180-200°C for 2 to 5 minutes.
  • the effectiveness of a coating composition according to invention was determined by spraying a composition prepared according to example 1 on the surface of a decorated white porcelain tile. The tile was then oven cured for 2 to 5 minutes at a temperature of 100 to 120°C. After letting it cool back to room temperature (20 + 5°C), the coated tile and a non treated decorated white tile (control) were both dipped the in a bath of green tile paint. The tiles remained inside the solution for a 2 to 3 seconds and then pulled up. As shown in Figure 4, the tile coated with the anti-stain composition of the invention does not chanse color while the non treated tile becomes green.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne des compositions de revêtement pour article en porcelaine, en particulier, des compositions de revêtement anti-coloration pour vaisselle en porcelaine, et leur procédé de préparation. La présente invention concerne également un procédé de revêtement d'un article en porcelaine, en particulier une vaisselle en porcelaine choisie parmi des assiettes, des bols, des tasses, des soucoupes, des carafes, des théières, des cafetières et des gobelets. L'invention concerne également un article en porcelaine revêtu, en particulier une vaisselle en porcelaine choisie parmi des assiettes, des bols, des tasses, des soucoupes, des carafes, des théières, des cafetières et des gobelets, comprenant au moins une couche d'une composition de revêtement selon l'invention.
PCT/IB2016/050198 2016-01-15 2016-01-15 Composition de revêtement anti-coloration pour article en porcelaine WO2017122050A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IB2016/050198 WO2017122050A1 (fr) 2016-01-15 2016-01-15 Composition de revêtement anti-coloration pour article en porcelaine
EP16703361.2A EP3405539A1 (fr) 2016-01-15 2016-01-15 Composition de revêtement anti-coloration pour article en porcelaine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2016/050198 WO2017122050A1 (fr) 2016-01-15 2016-01-15 Composition de revêtement anti-coloration pour article en porcelaine

Publications (1)

Publication Number Publication Date
WO2017122050A1 true WO2017122050A1 (fr) 2017-07-20

Family

ID=55310853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/050198 WO2017122050A1 (fr) 2016-01-15 2016-01-15 Composition de revêtement anti-coloration pour article en porcelaine

Country Status (2)

Country Link
EP (1) EP3405539A1 (fr)
WO (1) WO2017122050A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327926A1 (de) * 1983-08-03 1985-02-21 Collo Gmbh, 5303 Bornheim Schutzmittel fuer haushaltszwecke
EP1116813A1 (fr) * 2000-01-10 2001-07-18 Dow Corning Corporation Adoussicant hydrophilie pour des textiles comprenant des polymères de epoxy glycol siloxane et des matériaux avec des fonctions amines
JP2005015727A (ja) * 2003-06-30 2005-01-20 Kansai Paint Co Ltd 撥水性被膜形成組成物及びそれを用いた塗装方法
WO2009129175A1 (fr) * 2008-04-14 2009-10-22 Dow Corning Corporation Émulsions d'organopolysiloxanes réticulés par le bore
WO2014193636A1 (fr) * 2013-05-31 2014-12-04 Dow Corning Corporation Traitement destiné à la préparation des émulsions aminofonctionelles de silicone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327926A1 (de) * 1983-08-03 1985-02-21 Collo Gmbh, 5303 Bornheim Schutzmittel fuer haushaltszwecke
EP1116813A1 (fr) * 2000-01-10 2001-07-18 Dow Corning Corporation Adoussicant hydrophilie pour des textiles comprenant des polymères de epoxy glycol siloxane et des matériaux avec des fonctions amines
JP2005015727A (ja) * 2003-06-30 2005-01-20 Kansai Paint Co Ltd 撥水性被膜形成組成物及びそれを用いた塗装方法
WO2009129175A1 (fr) * 2008-04-14 2009-10-22 Dow Corning Corporation Émulsions d'organopolysiloxanes réticulés par le bore
WO2014193636A1 (fr) * 2013-05-31 2014-12-04 Dow Corning Corporation Traitement destiné à la préparation des émulsions aminofonctionelles de silicone

Also Published As

Publication number Publication date
EP3405539A1 (fr) 2018-11-28

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