EP1943319A1 - Production de substrats enduits - Google Patents

Production de substrats enduits

Info

Publication number
EP1943319A1
EP1943319A1 EP06778205A EP06778205A EP1943319A1 EP 1943319 A1 EP1943319 A1 EP 1943319A1 EP 06778205 A EP06778205 A EP 06778205A EP 06778205 A EP06778205 A EP 06778205A EP 1943319 A1 EP1943319 A1 EP 1943319A1
Authority
EP
European Patent Office
Prior art keywords
composition
silane
substrate
inert solvent
drying
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Withdrawn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
EP06778205A
Other languages
German (de)
English (en)
Inventor
Edwin Nun
Heike Bergandt
Hannelore Armoneit
Marie-Theres Wilkes
Thomas Schrief
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.)
Evonik Operations GmbH
Original Assignee
Evonik Degussa GmbH
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 Evonik Degussa GmbH filed Critical Evonik Degussa GmbH
Publication of EP1943319A1 publication Critical patent/EP1943319A1/fr
Withdrawn legal-status Critical Current

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
    • C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
    • 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
    • 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

Definitions

  • the present invention relates to a process for coating substrates, as well as coated substrates, obtainable by the aforementioned process.
  • a composition is applied to the substrate, which subsequently hardens and thus forms a stable composite.
  • sol-gel process has the problem that during curing, the solvent used must be removed from the coating in order to achieve a curing or crosslinking of the coating. Due to the chemical and physical processes that occur during curing, the resulting layer has structural defects which can lead to cracks. This is problematic since the commonly used sol-gel coatings are only a few 100 nm thick. The porosities within the resulting layer due to the curing and crosslinking reactions then often lead to cracks. These resulting cracks and pores can be reduced by targeted sintering, ie a heat treatment.
  • the technical object underlying the present invention is to provide a process for coating substrates with sol-gel coatings, in which high layer thicknesses can be achieved in which no cracks occur, wherein the application of multiple coatings should be avoided .
  • a further object of the present invention is the provision of a coated substrate in which the coating applied with a sol-gel process is free of cracks.
  • the technical object of the present invention is achieved by a method for coating substrates, comprising the steps:
  • step b) drying the composition applied in step b) at a drying temperature of 100 ° C. to 250 ° C.
  • the process of the present invention is not limited to any specific substrates.
  • the substrates can be both open-pored and closed-pore.
  • the substrates should show no change at the selected drying temperature of step c), ie be thermally stable at these drying temperatures.
  • the substrate may be an open-pore or closed-pore substrate.
  • the substrate may be a woven fabric, a knitted fabric, a film, a tile, a stone or a metallic substrate.
  • the composition of step b) preferably comprises 3-glycidyloxypropyltriethoxysilane and / or 3-glycidyloxypropyltrimethoxysilane as the silane and / or 3-aminopropyltrimethoxysilane and / or 3-aminopropyltriethoxysilane as the second silane.
  • step b) tetraethoxysilane, methyltriethoxysilane, octyltriethoxysilane and / or hexadecyltrimethoxysilane as silane and / or 3,3,4,4,5,5,6,6,7,7,8,8,8 Tridecafluorooctyltriethoxysilane as the second silane.
  • any solvent having a corresponding boiling point can be used.
  • the inert solvent in a preferred embodiment does not substantially react with the other components of the composition of step b). Rather, surprisingly, a homogeneous, pore and crack-free surface is produced on the substrate by the inert solvent.
  • the inert solvent evaporates from the coating. It is believed that the evaporation of the inert solvent, the flexibility of the curing and crosslinking composition of step b) is guaranteed longer, so that initially forms a solid structure and only completely evaporated after formation of the solid structure, the inert solvent.
  • the inert solvent under the drying conditions of step c) has a boiling point in the range of 4O 0 C above or below the drying temperature of step c), more preferably in the range of 30 0 C above or below the Drying temperature of step c), more preferably in the range of 2O 0 C above or below the drying temperature of step c) and most preferably, the boiling point of the inert solvent is in a range of 10 0 C above or below the drying temperature of step c).
  • the boiling point of the inert solvent under the drying conditions of step c) is almost identical to the drying temperature of step c).
  • the inert solvents used can be any of a wide variety of inert solvents.
  • the inert solvent may be selected depending on the drying temperature of step c).
  • the inert solvent is selected from the group consisting of alcohols, formamides, ketones, ethers and mixtures thereof.
  • the inert solvent is not water.
  • the amount of inert solvent in the composition of step b) is not further limited. In a preferred embodiment, based on the total molar amount of silane of the composition of step b), 0.1 to 200 mol% of inert solvent. In a further preferred embodiment, 0.2 to 160 mole%, more preferably 0.5 to 150 mole%, and most preferably 1.0 to 100 mole% of inert solvent is included in the composition of step b).
  • the inert solvent under the drying conditions of step c) has a boiling point of at least 90 0 C, more preferably of at least 100 0 C, in particular of at least 11O 0 C and most preferably of at least 120 ° C.
  • the composition of step b) further contains an initiator.
  • the initiator in a preferred embodiment is an acid or a base which is preferably an aqueous acid or base.
  • the aqueous base or acid is preferably added in such a way that the molar ratio of water to compounds of the formula (Z1) 1Si (OR) 3, in particular GlySi (OR) 3 in the preparation of the mixture of 100,000: 1 to 10: 1, preferably from 1000: 1 to 100: 1.
  • At least one further solvent may be present, which preferably has a lower boiling point than the inert solvent.
  • Preferred further solvents are low-boiling alcohols, such as, for example, ethanol or isopropanol.
  • at least one further additive may be included. As additives, it is possible to use all compounds which are familiar to the person skilled in the art in connection with sol-gel coatings.
  • oxide particles selected from the oxides of Ti, Si, Zr, Al, Y, Sn, Ce or mixtures thereof, may be contained.
  • the oxide particles may preferably have a hydrophobic surface.
  • on the surface of the oxide particles are bonded to silicon atoms bonded organic radicals X1 + 2nCn, wherein n is 1 to 20 and X is hydrogen and / or fluorine.
  • the oxide particles have a hydrophobic surface, it is preferable to partially hydrolyze the surface of the oxide particles under the reaction conditions of the sol-gel formation of the present invention.
  • reactive centers are preferably formed which react with the organic silicon compounds of the composition from step b). These organic silicon compounds are covalently bound to the oxide particles during curing by z. B. -O bonds bound.
  • the oxide particles are covalently crosslinked with the hardening sol-GeI.
  • the layer thickness of the cured layer can be further increased thereby.
  • the oxide particles may have an average particle size of 10 to 1,000 nm, preferably 20 to 500 nm, more preferably 30 to 250 nm.
  • the coating is to be transparent and / or colorless, it is preferred to use only oxide particles which have an average particle size of from 10 to 250 nm.
  • the mean particle size refers to the size of the primary particles or, if the oxides are present as agglomerates, to the size of the agglomerates.
  • the particle size is determined by light scattering methods, for example by a device of the type HORIBA LB 550® (Retsch Technology).
  • the composition of step b) may be applied to the substrate by various well-known methods.
  • the composition may, for example, be doctored, brushed, rolled up, sprayed on or by immersing the substrate in the composition.
  • the drying of the composition in step c) can be carried out by any method known to those skilled in the art.
  • the drying can be carried out in an oven.
  • Particularly preferred are a convection oven, an infrared field and / or a microwave radiator.
  • the drying temperature during the drying in step c) is substantially constant and preferably constant. This means that preferably, for example, an oven is heated to the desired drying temperature, and that the substrate on which the composition of step b) is applied is introduced into the preheated oven. After the desired drying time, which is necessary to dry and optionally cure the applied composition, the coated substrate is removed from the drying unit.
  • the drying times are not limited. However, they should be chosen so that complete removal of the solvent from the applied coating is possible.
  • the drying time of step c) is preferably between 1 minute and 3 hours.
  • a layer of the dried composition having a layer thickness of 0.05 to 10 ⁇ m is present on the substrate.
  • the coated substrate of the present invention surprisingly shows a very high freedom from cracks, wherein in a preferred embodiment substantially no cracks are present in the coating.
  • the chromium oxide oil test according to DIN EN ISO 10 545-14 is a test for the proof of crack-freeness.
  • chromium oxide which has a green color, to the applied coating.
  • the degree of discoloration of the coating is an indicator for the pore or crack-free surface.
  • the coatings of the invention show a very high pore and crack-free surface, so that the chromium oxide oil can be removed almost without residue.
  • the substrates coated with the process of the present invention show an improved coating compared to the prior art coatings.
  • the coatings of the present invention can be used as scratch-resistant coatings on polymeric fabrics as well as for the sealing of natural stones.
  • At least one further coating can be applied before application of the composition in step b).
  • This coating can, for example, a print, such. B. be a design print.
  • At least one further coating can be applied after application of the composition in step b).
  • This further coating can also be applied after the drying in step c).
  • This further coating can, for example, a printing, such. B. be a design print.
  • a coated substrate obtainable by the method described herein has many uses. In particular, avoiding multiple coatings makes it possible to manufacture coated substrates more efficiently. Examples
  • Example 1 From 25.5 g of 3, 3,4,4,5,5,6,6, 7,7,8,8,8-tridecafluorooctyltriethoxysilane, 4.45 g of 3-glycidyloxypropyltriethoxysilane and 83.2 g of tetraethylorthosilicate a mixture made.
  • Pentanone produced under ultrasound and has a concentration of 10 wt .-% on.
  • the particle size distribution of the dispersion was determined by means of light scattering on a particle size measuring device from Horiba. Here are the following
  • a marble slab "Carrara Antik” measuring 7.5 x 7.5 cm is cleaned with a detergent using a brush and water, then the slab is dried for 24 h at 60 ° C. and then cooled in a desiccator.
  • the SoI applies a 50 ⁇ m thick layer to the stone plate in a hand-held frame.
  • the coated stone slab was allowed to stand for 1 h at room temperature and then heated to 150 ° C. for 15 minutes. After 24 h, the coating was characterized. The coating shows after drying and hardening a mean layer thickness of about 20 microns.
  • a drop of water is applied to the coating. This water droplet does not penetrate the coating, but remains on the coating.
  • the chromium oxide oil test according to DIN EN ISO 10 545-14 shows that Cr2O3 can be completely removed after an exposure time of 24 h. There are no discolorations.
  • a drop of water is applied to the coating. This water droplet penetrates into the coating.
  • the chromium oxide oil test in accordance with DIN EN ISO 10 545-14 shows that Cr2O3 can not be completely removed after an exposure time of 24 hours.
  • the Cr2O3 leaves green patches in the resulting pores and holes of the coating.
  • substrates can be provided with a crack-free coating by the method of the present invention.
  • the coating of the present invention is resistant to environmental influences and provides secure protection of the underlying substrate.

Landscapes

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

Abstract

La présente invention concerne un procédé d'enduction de substrats consistant a) à préparer un substrat, b) à appliquer une composition sur au moins une surface du substrat, cette composition contenant un silane de formule générale (Z1)Si(OR3), dans laquelle Z1 = OR ou GIy (Gly=3-glycidyloxypropyle) ; R désigne un groupe alkyle présentant 1 à 6 atomes de carbone et tous les R peuvent être identiques ou différents, un solvant inerte et un amorceur, ce solvant inerte présentant dans les conditions de séchage de l'étape c) un point d'ébullition situé dans une plage de 50 °C au-dessus ou au-dessous de la température de séchage de l'étape c) et le solvant inerte présentant un point d'ébullition d'au moins 80 °C dans les conditions de séchage de l'étape c), puis c) à sécher la composition appliquée à l'étape b) à une température de séchage comprise entre 100 °C et 250 °C. Cette invention concerne également un substrat enduit obtenu par le procédé susmentionné.
EP06778205A 2005-11-03 2006-08-10 Production de substrats enduits Withdrawn EP1943319A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052939A DE102005052939A1 (de) 2005-11-03 2005-11-03 Herstellung von beschichteten Substraten
PCT/EP2006/065201 WO2007051662A1 (fr) 2005-11-03 2006-08-10 Production de substrats enduits

Publications (1)

Publication Number Publication Date
EP1943319A1 true EP1943319A1 (fr) 2008-07-16

Family

ID=37654835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06778205A Withdrawn EP1943319A1 (fr) 2005-11-03 2006-08-10 Production de substrats enduits

Country Status (7)

Country Link
US (1) US7993707B2 (fr)
EP (1) EP1943319A1 (fr)
JP (1) JP5069243B2 (fr)
DE (1) DE102005052939A1 (fr)
NO (1) NO20082450L (fr)
RU (1) RU2008121876A (fr)
WO (1) WO2007051662A1 (fr)

Families Citing this family (8)

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DE102005052938A1 (de) 2005-11-03 2007-05-10 Degussa Gmbh Verfahren zur Beschichtung von Substraten mit Beschichtungssystemen enthaltend reaktive hydrophobe anorganische Füllstoffe
DE102006027480A1 (de) * 2006-06-14 2008-01-10 Evonik Degussa Gmbh Kratz- und abriebfeste Beschichtungen auf polymeren Oberflächen
DE102007009590A1 (de) * 2007-02-26 2008-08-28 Evonik Degussa Gmbh Glänzender und kratzfester Nagellack durch Zusatz von Sol-Gel-Systemen
DE102007009589A1 (de) 2007-02-26 2008-08-28 Evonik Degussa Gmbh Glänzender und kratzfester Nagellack durch Zusatz von Silanen
US9535215B2 (en) * 2008-09-15 2017-01-03 Brphotonics Productos Optoelectronicos Ltda. Fluorinated sol-gel low refractive index hybrid optical cladding and electro-optic devices made therefrom
WO2015171844A1 (fr) * 2014-05-09 2015-11-12 University Of Central Florida Research Foundation, Inc. Compositions de revêtement résistant à la poussière et à l'humidité, procédés et articles revêtus obtenus
CN108059721A (zh) * 2017-12-25 2018-05-22 荆州市江汉精细化工有限公司 一种酸性氨基硅烷水解液的制备方法
EP3904463A1 (fr) * 2020-04-30 2021-11-03 Flooring Technologies Ltd. Composition permettant de matage et de réduction des effets anti-empreintes des surfaces sur des matières porteuses

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Also Published As

Publication number Publication date
JP5069243B2 (ja) 2012-11-07
US20080292799A1 (en) 2008-11-27
JP2009514661A (ja) 2009-04-09
WO2007051662A1 (fr) 2007-05-10
US7993707B2 (en) 2011-08-09
DE102005052939A1 (de) 2007-05-10
NO20082450L (no) 2008-05-30
RU2008121876A (ru) 2009-12-10

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