WO2022148908A1 - Coating composition, method for forming a coating and use - Google Patents

Coating composition, method for forming a coating and use Download PDF

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Publication number
WO2022148908A1
WO2022148908A1 PCT/FI2022/050008 FI2022050008W WO2022148908A1 WO 2022148908 A1 WO2022148908 A1 WO 2022148908A1 FI 2022050008 W FI2022050008 W FI 2022050008W WO 2022148908 A1 WO2022148908 A1 WO 2022148908A1
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WIPO (PCT)
Prior art keywords
coating composition
component
weight
coating
siloxane
Prior art date
Application number
PCT/FI2022/050008
Other languages
French (fr)
Inventor
Matti Järvinen
Original Assignee
Navispro Oy
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Publication date
Application filed by Navispro Oy filed Critical Navispro Oy
Publication of WO2022148908A1 publication Critical patent/WO2022148908A1/en

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    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/18—Homopolymers or copolymers of tetrafluoroethene
    • 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
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1693—Antifouling paints; Underwater paints as part of a multilayer system
    • 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
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • 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
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • 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
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C09D123/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C09D123/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
    • 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
    • C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
    • C09D125/02—Homopolymers or copolymers of hydrocarbons
    • C09D125/04—Homopolymers or copolymers of styrene
    • C09D125/08—Copolymers of styrene
    • C09D125/14—Copolymers of styrene with unsaturated esters
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • C09D5/1637—Macromolecular compounds
    • 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
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
    • C09D5/1662—Synthetic film-forming substance
    • C09D5/1668—Vinyl-type polymers
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Definitions

  • the application relates to a coating composi tion as defined in claim 1 and to a method for forming a coating as defined in claim 14, as well as to use of the coating composition as defined in claim 18 and to use of the method as defined in claim 19.
  • the object is to disclose a new type of coat ing composition and method for forming a coating, e.g. to an outer surface of a boat or to an outer surface of blades of a wind turbine.
  • a further object is to disclose a new type of coating composition that does not dissolve to the environment from the surface being coated and that is non-toxic and colourless.
  • a further object is to disclose a coating that makes the surface slippery and reduces friction.
  • the coating composition, the method, and the use of the coating composition and the method are characterized by features set forth in the claims.
  • the coating composition comprises at least a first component, a siloxane-based component and a binder component.
  • the coating composition comprises at least the following components: a first component that com prises polytetrafluoroethylene or a derivative there of, a silicone-based substance or another suitable substance having a low coefficient of friction, a si loxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate.
  • a first component that com prises polytetrafluoroethylene or a derivative there of
  • a silicone-based substance or another suitable substance having a low coefficient of friction a si loxane-based component
  • a binder component that comprises a polymer dispersion of styrene acrylate.
  • the coating composition is in the form of a dispersion.
  • the siloxane-based compo nent is a siloxane compound, a silicone-based compound or a corresponding substance.
  • the siloxane-based component is a siloxane or silicone ol igomer compound.
  • the siloxane-based component is alkoxymethylsiloxane.
  • the siloxane-based component is in the form of a dis persion, e.g. in the form of an oil dispersion.
  • the first component com prises at least polytetrafluoroethylene or a deriva tive thereof, a silicone-based substance or another suitable substance having a low coefficient of fric tion.
  • the first component comprises polytetrafluoroethylene, a derivative thereof, a sili cone-based substance and/or a substance having a low coefficient of friction.
  • the first component comprises polytetrafluoroethylene (PTFE), e.g. teflon, or a derivative thereof.
  • PTFE polytetrafluoroethylene
  • the first component comprises a substance having a low coefficient of friction.
  • the first component comprises a silicone-based substance, such as silicone, e.g. polysiloxane, or a derivative of silicone.
  • the first component comprises a ceramic.
  • the coefficient of friction of the first component is lower than 0.15, and in one embodiment lower than 0.1.
  • the first component com prises polytetrafluoroethylene (PTFE), e.g. teflon or equivalent, as a main substance.
  • PTFE polytetrafluoroethylene
  • a de rivative of polytetrafluoroethylene or a polytetraflu- oroethylene-based substance suitable for the purpose of use may be used as the main substance of the first component.
  • the first component com prises polytetrafluoroethylene or a derivative there of, and polyisobutylene and/or poly-alpha-olefin has been used as a carrier.
  • the first component of the coating composition consists of A and B components, wherein the A component comprises poly tetrafluoroethylene and polyisobutylene has been used as a carrier and wherein the B component comprises polytetrafluoroethylene and poly-alpha-olefin (PAO) has been used as a carrier.
  • the same substance is used as the main substance of the A and B component.
  • a different substance is used as the main substance in the A and B components.
  • the first component com prises a silicone-based substance.
  • the silicone-based substance may be silicone or a derivative thereof.
  • the silicone-based substance is a sili cone that is a polysiloxane.
  • the polysiloxane may be any polysiloxane suitable for the purpose of use, e.g. polyethylenesiloxane or polydi- methylenesiloxane .
  • the silicone- based substance is in the form of a dispersion, e.g. an aqueous dispersion.
  • the coating composition comprises the first component in an amount of 1 - 40 % by weight, in one embodiment 2 - 30 % by weight and in one embodiment 5 - 20 % by weight. In one embodiment the coating composition comprises the first component in an amount of 1 - 20 % by weight, in one embodiment 3 - 15 % by weight, and in one embodiment 5 - 10 % by weight.
  • the coating composition contains the A component in an amount of 1 - 30 % by weight, in one embodiment 1 - 20 % by weight, and in one embodiment 1 - 10 % by weight. In one embodiment the coating composition contains the B component in an amount of 1 - 30 % by weight, in one embodiment 1 - 20 % by weight, and in one embodiment 1 - 10 % by weight. In one embodiment the coating composition contains the A component in an amount of 1 - 7 % by weight and the B component in an amount of 1 - 7 % by weight.
  • the coating composition contains the binder component in an amount of 20 - 80 % by weight, in one embodiment 30 - 70 % by weight, in one embodiment 40 - 67 % by weight, and in one embodi ment 50 - 65 % by weight. In one embodiment the coat ing composition contains the binder component in an amount of 57 - 63 % by weight.
  • the coating composition contains the siloxane-based component in an amount of 10 - 50 % by weight, in one embodiment 10 - 40 % by weight, in one embodiment 15 - 37 % by weight, and in one embodiment 17 - 35 % by weight. In one embodiment the coating composition contains the siloxane-based component in an amount of 20 - 32 % by weight.
  • the coating composition contains the first component in an amount of 2 - 15 % by weight, the binder component in an amount of 40 - 70 % by weight and the siloxane-based component in an amount of 15 - 40 % by weight. In one embodiment the coating composition contains the first component in an amount of 3 - 12 % by weight, the binder component in an amount of 45 - 68 % by weight and the siloxane- based component in an amount of 17 - 35 % by weight. In one embodiment the coating composition contains the first component in an amount of 5 - 10 % by weight, the binder component in an amount of 50 - 65 % by weight and the siloxane-based component in an amount of 20 - 32 % by weight.
  • the coating composition is applied onto a desired surface to form a coating.
  • the surface to be coated may be washed, cleaned and/or ground before applying the coating com position.
  • the surface to be coated is roughened or ground before applying the coating composition.
  • the coating composition ad ditionally comprises a primer substance that is a binder component and that is applied under the coating composition to the surface to be coated when using the coating composition.
  • a method embodiment for forming a coating comprises the steps of a) applying a binder component that comprises a polymer dispersion of sty rene acrylate onto a surface to be treated as a primer and b) applying over the primer a coating composition that has been described in this specification and that is formed by mixing the components of the coating com position to form the composition.
  • the coating composition is formed by mixing a first component that comprises polytetrafluoroethylene or a derivative thereof, a silicone-based substance or a substance having a low coefficient of friction, a si loxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate.
  • the siloxane-based compo nent of the coating composition of step b) of the method is selected from a group of: a siloxane com pound, a silicone-based compound or a corresponding substance.
  • the siloxane-based compo nent is alkoxymethylsiloxane.
  • the first component com prises polytetrafluoroethylene or a derivative there of, and polyisobutylene and/or poly-alpha-olefin has been used as a carrier.
  • the first component comprises a silicone-based substance.
  • the first component comprises a substance having a low coefficient of friction.
  • primer may be done with a sprayer, a brush or in another suitable way.
  • the primer is allowed to dry at an ambient temperature.
  • the surface to be coat ed may be washed, cleaned and/or ground before apply ing the primer.
  • the surface to be coated is roughened or ground before applying the pri mer.
  • the surface to be coated may be warmed before applying the primer.
  • the coated surface is warmed to dry the coating. In one embodiment, after applying the coating composition the coated surface is heated.
  • the coating composition is used in the treatment of an outer surface of a boat or blades of a wind turbine.
  • the coating composition may also be used in other applications.
  • the method and the coating formed therein are used in the treatment, e.g. coating, of an outer surface of a boat or blades of a wind turbine.
  • the coating composition or the coat ing is used in making a desired surface slippery.
  • the desired surface e.g. a metal surface, is treated with the coating composition to make the surface slippery, to reduce friction of the surface and/or to form a hydrophobic interface.
  • the coating composition and the coating formed from it provide significant advantages over the prior art.
  • friction of the coated surface may be reduced and the surface can be made more slippery.
  • the coating composition holds very well to the surface being coat ed, and it does not dissolve to the environment from the coated surface.
  • the coating makes the coated sur- face smooth and makes the surface slippery, and thus reduces friction, such as air resistance or resistance caused by water.
  • the coating provides a hydrophobic interface in connection with the coated surface, whereby e.g. a hydrophobic film is formed be- tween the coating and a surrounding state of matter such as water. Thereby the surface repels water, and drops of water so to speak roll off the surface.
  • the coating com- position also prevents very well the adhesion of dirt to the coated surface, which also reduces friction.
  • the coated surface can be easily washed with water without any chemicals, and possible dirt can be easily removed from the surface.
  • the coating composi- tion can be easily applied to a desired surface to form a coating to that surface.
  • a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine.
  • the coating composition comprised a first component and a binder component.
  • the first component of the coating composition consisted of A and B compo nents.
  • the A component 25 % dispersion
  • the B component (30 % dispersion) comprised poly tetrafluoroethylene (PTFE) in an amount of 30 %
  • the carrier was poly-alpha-olefin.
  • the amount of the A component in the coating composi tion was 20 % by weight, and the amount of the B com ponent was 20 % by weight.
  • the binder component con sisted of a polymer dispersion of styrene acrylate, and the amount of the binder component in the coating composition was 45 % by weight.
  • the coat ing composition contained a siloxane-based component that was alkoxymethylsiloxane (100 %) in an amount of 15 % by weight.
  • the A component had a specific weight of 1 g/cm 3 and a particle size mean value of 0.4 - 0.8 pm.
  • the B component had a particle size mean value of 0.4 - 0.8 pm and a viscosity of ⁇ 2000 cps.
  • a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine.
  • the coating composition comprised a first component and a binder component.
  • the first component of the coating composition consisted of A and B compo nents.
  • the A component 25 % dispersion
  • the B component (30 % dispersion) comprised polytetrafluoroethylene (PTFE), and in the B component the carrier was poly-alpha- olefin.
  • the amount of the A component in the coating composition was 15 % by weight, and the amount of the B component was 15 % by weight.
  • the binder component consisted of a polymer dispersion of styrene acrylate, and the amount of the binder component in the coating composition was 40 % by weight.
  • the coat ing composition contained a siloxane-based component that was alkoxymethylsiloxane (100 %) in an amount of 30 % by weight.
  • the A component had a specific weight of 1 g/cm 3 and a particle size mean value of 0.4 - 0.8 pm.
  • the B component had a particle size mean value of 0.4 - 0.8 pm and a viscosity of ⁇ 2000 cps.
  • the coating composition according to Example 2 was used as a coating in the bottom of a boat.
  • An outer surface, i.e. the bottom, of the boat was treated by applying the binder component, that is a polymer dispersion of styrene acrylate, onto the outer surface of the boat being treated as a pri mer.
  • the binder component was applied for example with a brush or by spraying. Alternatively the binder com ponent could be applied in another desired way.
  • the binder component was allowed to dry at an ambient tem perature.
  • the bottom of the boat was washed, cleaned and/or ground before applying the primer.
  • Over the primer the coating composition according to Example 2 was applied, which coating composition was formed by mixing the constituents to form the coating composi tion.
  • coating compositions were formed for use as a coating in the bottom of a boat.
  • the coating compositions formed were tested in the bottom of a boat at lake Saimaa.
  • the coating composition comprised a first component, a siloxane-based component and a binder component.
  • the first component of the coating composi tion consisted of two component parts that both con tained polytetrafluoroethylene (PTFE), and in one of them the carrier was polyisobutylene and in the other one the carrier was poly-alpha-olefin.
  • the first com ponent contained an equal amount of both component parts.
  • the siloxane-based component was alkoxyme- thylsiloxane having a siloxane content of 100 %.
  • the binder component was a polymer dispersion of styrene acrylate.
  • the coating composition contained 5 - 10 % by weight of the first component, 20 - 35 % by weight of the siloxane-based component and 55 - 75 % by weight of the binder.
  • An outer surface or at least part of the out er surface of the boat was treated by applying the binder component, i.e. a polymer dispersion of styrene acrylate, onto the outer surface of the boat being treated as a primer.
  • the binder component was applied for example with a brush or by spraying.
  • the binder component was allowed to dry at an ambient tempera ture.
  • the bottom of the boat was washed and cleaned before applying the primer.
  • the bottom of the boat was slightly roughened by grinding before applying the binder component.
  • Over the primer the above-described coating composition was applied, which coating compo sition had been formed by mixing the constituents to form the coating composition.
  • a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine.
  • the coating composition comprised a first component, a siloxane-based component and a binder component.
  • the first component of the coating composi tion consisted of a silicone-based substance that was a polysiloxane.
  • the binder component was a polymer dispersion of styrene acrylate.
  • the siloxane-based component was alkokxymethylsiloxane.
  • the coating com position contained 5 - 20 % by weight of the first component, 20 - 35 % by weight of the siloxane-based component and 55 - 75 % by weight of the binder.
  • the coating composition and the coating are suitable for use as different embodiments in any kinds of applications for forming a coating to a desired surface.

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  • 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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The application relates to a coating composition. The coating composition comprises at least the components: a first component that comprises polytetrafluoroethylene or a derivative thereof, a silicone-based substance or a substance having a low coefficient of friction, a siloxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate. In addition, the application relates to a method for forming a coating and to use, e.g. in the treatment of an outer surface of a boat or blades of a wind turbine.

Description

COATING COMPOSITION, METHOD FOR FORMING A COATING AND USE
FIELD The application relates to a coating composi tion as defined in claim 1 and to a method for forming a coating as defined in claim 14, as well as to use of the coating composition as defined in claim 18 and to use of the method as defined in claim 19.
BACKGROUND
Different primer materials and coatings that may be used in the treatment and coating of an outer surface of a boat or blades of a wind turbine are known in the prior art. Currently, toxic paints that may dissolve in the water system are used in boat out er surfaces, such as bottom and sides.
OBJECT The object is to disclose a new type of coat ing composition and method for forming a coating, e.g. to an outer surface of a boat or to an outer surface of blades of a wind turbine. A further object is to disclose a new type of coating composition that does not dissolve to the environment from the surface being coated and that is non-toxic and colourless. A further object is to disclose a coating that makes the surface slippery and reduces friction. SUMMARY
The coating composition, the method, and the use of the coating composition and the method are characterized by features set forth in the claims. The coating composition comprises at least a first component, a siloxane-based component and a binder component.
DETAILED DESCRIPTION
The coating composition comprises at least the following components: a first component that com prises polytetrafluoroethylene or a derivative there of, a silicone-based substance or another suitable substance having a low coefficient of friction, a si loxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate. In one embodiment the coating composition is in the form of a dispersion.
In one embodiment the siloxane-based compo nent is a siloxane compound, a silicone-based compound or a corresponding substance. In one embodiment the siloxane-based component is a siloxane or silicone ol igomer compound. In one embodiment the siloxane-based component is alkoxymethylsiloxane. In one embodiment the siloxane-based component is in the form of a dis persion, e.g. in the form of an oil dispersion.
In one embodiment the first component com prises at least polytetrafluoroethylene or a deriva tive thereof, a silicone-based substance or another suitable substance having a low coefficient of fric tion. In one embodiment the first component comprises polytetrafluoroethylene, a derivative thereof, a sili cone-based substance and/or a substance having a low coefficient of friction. In one embodiment the first component comprises polytetrafluoroethylene (PTFE), e.g. teflon, or a derivative thereof. In one embodi ment the first component comprises a substance having a low coefficient of friction. In one embodiment the first component comprises a silicone-based substance, such as silicone, e.g. polysiloxane, or a derivative of silicone. In one embodiment the first component comprises a ceramic. In one embodiment the coefficient of friction of the first component is lower than 0.15, and in one embodiment lower than 0.1.
In one embodiment the first component com prises polytetrafluoroethylene (PTFE), e.g. teflon or equivalent, as a main substance. Alternatively a de rivative of polytetrafluoroethylene or a polytetraflu- oroethylene-based substance suitable for the purpose of use may be used as the main substance of the first component. In one embodiment the first component com prises polytetrafluoroethylene or a derivative there of, and polyisobutylene and/or poly-alpha-olefin has been used as a carrier. In one embodiment the first component of the coating composition consists of A and B components, wherein the A component comprises poly tetrafluoroethylene and polyisobutylene has been used as a carrier and wherein the B component comprises polytetrafluoroethylene and poly-alpha-olefin (PAO) has been used as a carrier. In one embodiment the same substance is used as the main substance of the A and B component. In one embodiment a different substance is used as the main substance in the A and B components.
In one embodiment the first component com prises a silicone-based substance. The silicone-based substance may be silicone or a derivative thereof. In one embodiment the silicone-based substance is a sili cone that is a polysiloxane. In one embodiment the polysiloxane may be any polysiloxane suitable for the purpose of use, e.g. polyethylenesiloxane or polydi- methylenesiloxane . In one embodiment the silicone- based substance is in the form of a dispersion, e.g. an aqueous dispersion.
In one embodiment the coating composition comprises the first component in an amount of 1 - 40 % by weight, in one embodiment 2 - 30 % by weight and in one embodiment 5 - 20 % by weight. In one embodiment the coating composition comprises the first component in an amount of 1 - 20 % by weight, in one embodiment 3 - 15 % by weight, and in one embodiment 5 - 10 % by weight.
In one embodiment the coating composition contains the A component in an amount of 1 - 30 % by weight, in one embodiment 1 - 20 % by weight, and in one embodiment 1 - 10 % by weight. In one embodiment the coating composition contains the B component in an amount of 1 - 30 % by weight, in one embodiment 1 - 20 % by weight, and in one embodiment 1 - 10 % by weight. In one embodiment the coating composition contains the A component in an amount of 1 - 7 % by weight and the B component in an amount of 1 - 7 % by weight.
In one embodiment the coating composition contains the binder component in an amount of 20 - 80 % by weight, in one embodiment 30 - 70 % by weight, in one embodiment 40 - 67 % by weight, and in one embodi ment 50 - 65 % by weight. In one embodiment the coat ing composition contains the binder component in an amount of 57 - 63 % by weight.
In one embodiment the coating composition contains the siloxane-based component in an amount of 10 - 50 % by weight, in one embodiment 10 - 40 % by weight, in one embodiment 15 - 37 % by weight, and in one embodiment 17 - 35 % by weight. In one embodiment the coating composition contains the siloxane-based component in an amount of 20 - 32 % by weight.
In one embodiment the coating composition contains the first component in an amount of 2 - 15 % by weight, the binder component in an amount of 40 - 70 % by weight and the siloxane-based component in an amount of 15 - 40 % by weight. In one embodiment the coating composition contains the first component in an amount of 3 - 12 % by weight, the binder component in an amount of 45 - 68 % by weight and the siloxane- based component in an amount of 17 - 35 % by weight. In one embodiment the coating composition contains the first component in an amount of 5 - 10 % by weight, the binder component in an amount of 50 - 65 % by weight and the siloxane-based component in an amount of 20 - 32 % by weight.
In one embodiment the coating composition is applied onto a desired surface to form a coating. In one embodiment the surface to be coated may be washed, cleaned and/or ground before applying the coating com position. In one embodiment the surface to be coated is roughened or ground before applying the coating composition.
In one embodiment the coating composition ad ditionally comprises a primer substance that is a binder component and that is applied under the coating composition to the surface to be coated when using the coating composition.
In a method embodiment for forming a coating the method comprises the steps of a) applying a binder component that comprises a polymer dispersion of sty rene acrylate onto a surface to be treated as a primer and b) applying over the primer a coating composition that has been described in this specification and that is formed by mixing the components of the coating com position to form the composition. In one embodiment the coating composition is formed by mixing a first component that comprises polytetrafluoroethylene or a derivative thereof, a silicone-based substance or a substance having a low coefficient of friction, a si loxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate.
In one embodiment the siloxane-based compo nent of the coating composition of step b) of the method is selected from a group of: a siloxane com pound, a silicone-based compound or a corresponding substance. In one embodiment the siloxane-based compo nent is alkoxymethylsiloxane. In one embodiment the first component com prises polytetrafluoroethylene or a derivative there of, and polyisobutylene and/or poly-alpha-olefin has been used as a carrier. In one embodiment the first component comprises a silicone-based substance. In one embodiment the first component comprises a substance having a low coefficient of friction.
Application of the primer may be done with a sprayer, a brush or in another suitable way. In one embodiment the primer is allowed to dry at an ambient temperature. In one embodiment the surface to be coat ed may be washed, cleaned and/or ground before apply ing the primer. In one embodiment the surface to be coated is roughened or ground before applying the pri mer. In one embodiment the surface to be coated may be warmed before applying the primer.
In one embodiment, after applying the coating composition the coated surface is warmed to dry the coating. In one embodiment, after applying the coating composition the coated surface is heated.
In one embodiment the coating composition is used in the treatment of an outer surface of a boat or blades of a wind turbine. In addition, the coating composition may also be used in other applications. In one embodiment the method and the coating formed therein are used in the treatment, e.g. coating, of an outer surface of a boat or blades of a wind turbine. In one embodiment the coating composition or the coat ing is used in making a desired surface slippery. Preferably, the desired surface, e.g. a metal surface, is treated with the coating composition to make the surface slippery, to reduce friction of the surface and/or to form a hydrophobic interface.
The coating composition and the coating formed from it provide significant advantages over the prior art. By means of the coating composition and the coating, friction of the coated surface may be reduced and the surface can be made more slippery. The coating composition holds very well to the surface being coat ed, and it does not dissolve to the environment from the coated surface. The coating makes the coated sur- face smooth and makes the surface slippery, and thus reduces friction, such as air resistance or resistance caused by water. In addition, the coating provides a hydrophobic interface in connection with the coated surface, whereby e.g. a hydrophobic film is formed be- tween the coating and a surrounding state of matter such as water. Thereby the surface repels water, and drops of water so to speak roll off the surface. Thus for example a boat glides well in water, whereby the consumption of fuel is also reduced. The coating com- position also prevents very well the adhesion of dirt to the coated surface, which also reduces friction. In addition, the coated surface can be easily washed with water without any chemicals, and possible dirt can be easily removed from the surface. The coating composi- tion can be easily applied to a desired surface to form a coating to that surface.
EXAMPLES
Example 1
In this example a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine. The coating composition comprised a first component and a binder component. The first component of the coating composition consisted of A and B compo nents. The A component (25 % dispersion) comprised polytetrafluoroethylene (PTFE) in an amount of 25 %, and in the A component the carrier was polyisobutyl ene. The B component (30 % dispersion) comprised poly tetrafluoroethylene (PTFE) in an amount of 30 %, and in the B component the carrier was poly-alpha-olefin. The amount of the A component in the coating composi tion was 20 % by weight, and the amount of the B com ponent was 20 % by weight. The binder component con sisted of a polymer dispersion of styrene acrylate, and the amount of the binder component in the coating composition was 45 % by weight. In addition, the coat ing composition contained a siloxane-based component that was alkoxymethylsiloxane (100 %) in an amount of 15 % by weight.
The A component had a specific weight of 1 g/cm3 and a particle size mean value of 0.4 - 0.8 pm. The B component had a particle size mean value of 0.4 - 0.8 pm and a viscosity of <2000 cps.
Example 2
In this example a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine.
The coating composition comprised a first component and a binder component. The first component of the coating composition consisted of A and B compo nents. The A component (25 % dispersion) comprised polytetrafluoroethylene (PTFE), and in the A component the carrier was polyisobutylene. The B component (30 % dispersion) comprised polytetrafluoroethylene (PTFE), and in the B component the carrier was poly-alpha- olefin. The amount of the A component in the coating composition was 15 % by weight, and the amount of the B component was 15 % by weight. The binder component consisted of a polymer dispersion of styrene acrylate, and the amount of the binder component in the coating composition was 40 % by weight. In addition, the coat ing composition contained a siloxane-based component that was alkoxymethylsiloxane (100 %) in an amount of 30 % by weight. The A component had a specific weight of 1 g/cm3 and a particle size mean value of 0.4 - 0.8 pm. The B component had a particle size mean value of 0.4 - 0.8 pm and a viscosity of <2000 cps.
Example 3
The coating composition according to Example 2 was used as a coating in the bottom of a boat.
An outer surface, i.e. the bottom, of the boat was treated by applying the binder component, that is a polymer dispersion of styrene acrylate, onto the outer surface of the boat being treated as a pri mer. The binder component was applied for example with a brush or by spraying. Alternatively the binder com ponent could be applied in another desired way. The binder component was allowed to dry at an ambient tem perature. The bottom of the boat was washed, cleaned and/or ground before applying the primer. Over the primer the coating composition according to Example 2 was applied, which coating composition was formed by mixing the constituents to form the coating composi tion.
In tests it was observed that the coating held very well to the bottom of the boat. The boat glided well in water, i.e. friction was reduced, and dirt did not adhere to the bottom of the boat. In ad dition, it was observed that the bottom of the boat was easily washable e.g. by means of a water spray or a pressure washer.
Example 4
In this example, coating compositions were formed for use as a coating in the bottom of a boat. The coating compositions formed were tested in the bottom of a boat at lake Saimaa.
The coating composition comprised a first component, a siloxane-based component and a binder component. The first component of the coating composi tion consisted of two component parts that both con tained polytetrafluoroethylene (PTFE), and in one of them the carrier was polyisobutylene and in the other one the carrier was poly-alpha-olefin. The first com ponent contained an equal amount of both component parts. The siloxane-based component was alkoxyme- thylsiloxane having a siloxane content of 100 %. The binder component was a polymer dispersion of styrene acrylate. The coating composition contained 5 - 10 % by weight of the first component, 20 - 35 % by weight of the siloxane-based component and 55 - 75 % by weight of the binder.
An outer surface or at least part of the out er surface of the boat was treated by applying the binder component, i.e. a polymer dispersion of styrene acrylate, onto the outer surface of the boat being treated as a primer. The binder component was applied for example with a brush or by spraying. The binder component was allowed to dry at an ambient tempera ture. The bottom of the boat was washed and cleaned before applying the primer. The bottom of the boat was slightly roughened by grinding before applying the binder component. Over the primer the above-described coating composition was applied, which coating compo sition had been formed by mixing the constituents to form the coating composition.
In tests it was observed that the coating formed from the coating composition held very well to the outer surface of the boat. It was observed that dirt and slime did not adhere to the parts of the out er surface of the boat that had been treated with the coating composition as described. Correspondingly, dirt and slime adhered very strongly to non-treated parts. When the boat was raised up from water, slime came off and fell down from the parts of the outer surface that had been treated with the coating as de- scribed. However, slime did not fall down from the non-treated parts, and the slime and dirt seemed to have stuck very fast. From the parts of the outer sur face that had been treated with the coating as de scribed it was easy to remove residual dirt by washing with tap water. When the whole bottom of the boat had been treated with the coating as described, the boat glided well in water, i.e. friction was reduced.
Example 5
In this example a coating composition was formed for use as a coating, for example in the bottom of a boat or blades of a wind turbine.
The coating composition comprised a first component, a siloxane-based component and a binder component. The first component of the coating composi tion consisted of a silicone-based substance that was a polysiloxane. The binder component was a polymer dispersion of styrene acrylate. The siloxane-based component was alkokxymethylsiloxane. The coating com position contained 5 - 20 % by weight of the first component, 20 - 35 % by weight of the siloxane-based component and 55 - 75 % by weight of the binder.
The coating composition and the coating are suitable for use as different embodiments in any kinds of applications for forming a coating to a desired surface.
The invention has been described above by way of example without limiting the invention in any way only to the compositions and applications as de scribed. Different embodiments of the invention are possible withing the scope defined by the claims.

Claims

1 . A coating composition, character ized in that the coating composition comprises at least the components: a first component that comprises polytetrafluoroeth- ylene or a derivative thereof, a silicone-based sub stance or a substance having a low coefficient of friction, a siloxane-based component, and a binder component that comprises a polymer dispersion of styrene acrylate.
2. The coating composition according to claim 1, characterized in that the siloxane-based component is a siloxane compound, a silicone-based compound or a corresponding substance.
3. The coating composition according to claim 1 or 2, characterized in that the siloxane- based component is alkoxymethylsiloxane.
4. The coating composition according to any one of claims 1 - 3, characterized in that the first component comprises polytetrafluoroethylene or a derivative thereof, and polyisobutylene and/or poly- alpha-olefin has been used as a carrier.
5. The coating composition according to any one of claims 1 - 4, characterized in that the first component consists of A and B components, wherein the A component comprises polytetrafluoroeth ylene and polyisobutylene has been used as a carrier and wherein the B component comprises polytetrafluoro ethylene and poly-alpha-olefin has been used as a car rier.
6. The coating composition according to any one of claims 1 - 5, characterized in that the first component comprises silicone.
7. The coating composition according to any one of claims 1 - 6, ch aracterized in that the coating composition comprises the first component in an amount of 10 - 20 % by weight.
8. The coating composition according to any one of claims 1 - 7, ch aracterized in that the coating composition contains the A component in an amount of 1 - 20 % by weight.
9. The coating composition according to any one of claims 1 - 8, ch aracterized in that the coating composition contains the B component in an amount of 1 - 20 % by weight.
10. The coating composition according to any one of claims 1 - 9, ch aracterized in that the coating composition contains the binder component in an amount of 30 - 70 % by weight.
11. The coating composition according to any one of claims 1 - 10, ch aracterized in that the coating composition contains the siloxane-based component in an amount of 10 - 40 % by weight.
12. The coating composition according to any one of claims 1 - 11, characterized in that the coating composition contains the first component, the siloxane-based component and the binder component, and the coating composition has 2 - 15 % by weight of the first component, 15 - 40 % by weight of the silox ane-based component and 40 - 70 % by weight of the binder component.
13. The coating composition according to any one of claims 1 - 12, characterized in that the coating composition additionally comprises a pri mer substance that is a binder component and that is applied under the coating composition when using the coating composition.
14. A method for forming a coating, char acterized in that the method comprises the steps a) for applying a binder component onto a surface to be treated as a primer, and b) for applying over the primer a coating composition, wherein the coating composition is formed by mixing a first component that comprises polytetrafluoroethylene or a derivative thereof, a silicone-based substance or a substance having a low coefficient of friction, a siloxane-based component and a binder component that comprises a polymer dispersion of styrene acrylate.
15. The method for forming a coating accord ing to claim 14, characterized in that the siloxane-based component of the coating composition of step b) of the method is selected from a group of: a siloxane compound, a silicone-based compound or a cor responding substance.
16. The method for forming a coating accord ing to claim 14 or 15, characterized in that the siloxane-based component is alkoxymethylsiloxane.
17. The method according to any one of claims 14 - 16, characterized in that the first com ponent comprises polytetrafluoroethylene or a deriva tive thereof, and polyisobutylene and/or poly-alpha- olefin has been used as a carrier.
18. Use of the coating composition according to any one of claims 1 - 13, characterized in that the coating composition formed is used in the treatment of an outer surface of a boat or blades of a wind turbine.
19. Use of the method according to any one of claims 14 - 17, characterized in that the method is used in the treatment of an outer surface of a boat or blades of a wind turbine.
PCT/FI2022/050008 2021-01-05 2022-01-05 Coating composition, method for forming a coating and use WO2022148908A1 (en)

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