[go: up one dir, main page]

WO2023187731A1 - Composition de revêtement et procédé permettant sa préparation - Google Patents

Composition de revêtement et procédé permettant sa préparation Download PDF

Info

Publication number
WO2023187731A1
WO2023187731A1 PCT/IB2023/053231 IB2023053231W WO2023187731A1 WO 2023187731 A1 WO2023187731 A1 WO 2023187731A1 IB 2023053231 W IB2023053231 W IB 2023053231W WO 2023187731 A1 WO2023187731 A1 WO 2023187731A1
Authority
WO
WIPO (PCT)
Prior art keywords
mass
range
composition
amount
respect
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.)
Ceased
Application number
PCT/IB2023/053231
Other languages
English (en)
Inventor
Ankit SONI
Venkatasubramanian CHANDRAMOULY
Randhirsinh PARMAR
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.)
Asian Paints Ltd
Asian Paints Ltd
Original Assignee
Asian Paints Ltd
Asian Paints 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
Application filed by Asian Paints Ltd, Asian Paints Ltd filed Critical Asian Paints Ltd
Publication of WO2023187731A1 publication Critical patent/WO2023187731A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes

Definitions

  • the present disclosure relates to a coating composition and a process for its preparation.
  • Hydrophilic refers to a property of a compound having a strong affinity for water. Thus, most of the hydrophilic substances are readily wettable by water.
  • Dirt pickup resistance refers to the ability of coating (e.g. paint) to resist dirt in exposure to natural environments. Though it is named “dirt pickup”, it is not defined in terms of the amount of dirt accumulated on a surface, but in terms of the colour change of a surface before and after a period of exposure.
  • Wettability refers to a property of attraction of a liquid phase to a solid surface, and it is typically quantified by using a contact angle with the solid phase.
  • Sheen refers to a visual property of the substance/material that shines with the reflected light.
  • Streak refers to a long, thin line or mark of a different substance or colour from the surroundings.
  • Streak resistance refers to the ability of the coating composition to resist the formation of streaks.
  • Biocide refers to a chemical substance or microorganisms intended to destroy, deter, render harmless or exert a controlling effect on any harmful organism.
  • Exterior primer refers to a specially formulated paint which seals the uneven pores and lays the foundation for the finish coats of the paint.
  • Coatings are widely used in various applications such as automotive, construction, architecture, wood industries, and the like.
  • the coatings are used for decorative as well as protective purposes.
  • the coatings when applied on the substrate are exposed to environmental conditions such as wind, UV light, rain, haze, and the like. Due to continuous exposure to such environmental conditions, the coatings undergo the phenomenon of discolouration, chalking, peeling, contamination and the like.
  • the coatings are exposed to various environmental contaminants such as organic and inorganic dust, dirt, pollutants, moisture, and the like. These environmental contaminants are suspended in the air and accumulate on the surface of outdoor structures. These accumulated contaminants are either washed away by rainwater or carried by rainwater when it rains and flows down on the surface of outdoor structures. As a result, contaminants are attached to the surface of outdoor structures along with the route of the rainwater. Once the surfaces are dried, the dirt appears on the surfaces.
  • Conventional coatings are associated with the drawback of dirty and dull appearance because of the dirt that clings on them. Moreover, the conventional coating has whitening problems.
  • An object of the present disclosure is to ameliorate one or more problems of the background or to at least provide a useful alternative.
  • Another object of the present disclosure is to provide a coating composition.
  • Yet another object of the present disclosure is to provide a coating composition that can resist dirt pick up. Still another object of the present disclosure is to provide a coating composition that has streak resistance.
  • Yet another object of the present disclosure is to provide a coating composition that has good durability when exposed to environmental conditions.
  • Another object of the present disclosure is to provide a coating composition that has high hydrophilicity, improved crack resistance, and flexibility.
  • Still another object of the present disclosure is to provide a simple and environment friendly process for the preparation of a coating composition.
  • the present disclosure relates to a coating composition and a process for its preparation.
  • the present disclosure relates to a coating composition.
  • the coating composition comprises biocide dispersion, at least one polyurethane dispersion, carbon nanotubes, at least one coupling agent, at least one wetting agent, at least one hydrophilicity agent, and at least one second fluid medium.
  • the biocide dispersion comprises at least one dendrimer polyol, at least one algicide, and at least one first fluid medium.
  • the biocide dispersion is present in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition
  • the polyurethane dispersion is present in an amount in the range of 25 mass% to 55 mass% with respect to the total mass of the composition
  • carbon nanotubes are present in an amount in the range of 0.1 mass% to 0.5 mass% with respect to the total mass of the composition
  • the coupling agent is present in an amount in the range of 0.5 mass% to 1.5 mass% with respect to the total mass of the composition
  • the wetting agent is present in an amount in the range of 0.05 mass% to 0.2 mass% with respect to the total mass of the composition
  • the hydrophilicity agent is present in an amount in the range of 25 mass% to 55 mass% with respect to the total mass of the composition
  • at least one second fluid medium is present in an amount in the range of 10 mass% to 20 mass% with respect to the total mass of the composition.
  • the composition further comprises a second dendrimer poly
  • the composition comprises a light stabilizer in an amount in the range of 0 mass% to 1 mass% with respect to the total mass of the composition, and a UV absorber in an amount in the range of 0 mass% to 2 mass% with respect to the total mass of the composition.
  • the biocide dispersion comprises the first dendrimer polyol in an amount in the range of 20 mass% to 50 mass% with respect to the total mass of the biocide dispersion, the algicide in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the biocide dispersion, and the first fluid medium in an amount in the range of 50 mass% to 78 mass% with respect to the total mass of the biocide dispersion.
  • the first dendrimer polyol and the second dendrimer polyol is at least one selected from the group consisting of polycarbonate dendrimer polyol, polyester dendrimer polyol, and combinations thereof.
  • the algicide is at least one selected from the group consisting of 3 -(3, 4-dichlorophenyl)- 1,1 -dimethylurea, iodopropynyl butylcarbamate, 2-n-octyl-4- isothiazolin-3-ones, and combinations thereof.
  • the first fluid medium is at least one selected from the group consisting of acetone, methyl ethyl ketone, diacetone alcohol and combinations thereof.
  • the biocide dispersion comprises polycarbonate dendrimer polyol as a first dendrimer polyol in an amount in the range of 25 mass% to 40 mass% with respect to the total mass of the biocide dispersion, 3-(3,4-dichlorophenyl)-l,l-dimethylurea as an algicide in an amount in the range of 3 mass% to 6 mass% with respect to the total mass of the biocide dispersion, and acetone as a first fluid medium in an amount in the range of 55 mass% to 70 mass% with respect to the total mass of the biocide dispersion.
  • the polyurethane dispersion is selected from water-based polyurethane dispersion, anionic aliphatic polyurethane dispersion, cyclo-aliphatic polyurethane dispersions, and combinations thereof.
  • the coupling agent is at least one selected from the group consisting of silane, alkoxysilane, epoxy functional silane oligomer, epoxy silane bearing polyfunctional structure bearing gamma-glycidoxy groups, epoxy functional silane oligomer, and combinations thereof.
  • the wetting agent is an anionic fluorosurfactant.
  • the hydrophilicity agent is at least one selected from the group consisting of colloidal silica, alumina quartz, a combination of colloidal silica and alumina, a combination of colloidal silica, quartz and a combination of alumina and quartz.
  • the second fluid medium is at least one selected from the group consisting of water, glycol and a combination of water and glycol.
  • the composition comprises the biocide dispersion in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition, water based polyurethane dispersion in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition, carbon nanotubes in an amount in the range of 0.1 mass% to 0.4 mass% with respect to the total mass of the composition, epoxy silane as a coupling agent in an amount in the range of 0.7 mass% to 1.3 mass% with respect to the total mass of the composition, anionic fluorosurfactant as a wetting agent in an amount in the range of 0.09 mass% to 0.18 mass% with respect to the total mass of the composition, colloidal silica as a hydrophilicity agent in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition, and water as a second fluid medium in an amount in the range of 11 mass% to 18 mass% with respect to the total mass of the composition.
  • the composition comprises the biocide dispersion in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition, water based polyurethane dispersion in an amount in the range of 33 mass% to 48 mass% with respect to the total mass of the composition, carbon nanotubes in an amount in the range of 0.1 mass% to 0.4 mass% with respect to the total mass of the composition, epoxy silane as a coupling agent in an amount in the range of 0.7 mass% to 1.3 mass% with respect to the total mass of the composition, anionic fluorosurfactant as a wetting agent in an amount in the range of 0.09 mass% to 0.18 mass% with respect to the total mass of the composition, colloidal silica as a hydrophilicity agent in an amount in the range of 33 mass% to 47 mass% with respect to the total mass of the composition, and water as a second fluid medium in an amount in the range of 12 mass% to 16 mass% with respect to the total mass of the composition.
  • the present disclosure relates to a process for the preparation of a coating composition.
  • the process comprises mixing a predetermined amount of at least one first dendrimer polyol and a predetermined amount of at least one algicide under stirring at a first predetermined speed for a first predetermined time period to obtain a first mixture.
  • a first fluid medium is added to the first mixture under stirring at a second predetermined speed for a second predetermined time period to obtain a biocide dispersion.
  • the biocide dispersion is mixed with the homogeneous polyurethane dispersion under stirring at a third predetermined speed for a third predetermined time period to obtain a second mixture.
  • Predetermined amounts of carbon nanotubes, at least one coupling agent, at least one wetting agent are added into the second mixture under stirring at a fourth predetermined speed for a fourth predetermined time period to obtain a third mixture.
  • a predetermined amount of at least one hydrophilicity agent is added to the third mixture followed by lowering the stirring speed in the range of 200 rpm to 500 rpm to obtain a fourth mixture.
  • a second fluid medium is mixed with the fourth mixture to obtain the coating composition.
  • the predetermined amount of the first dendrimer polyol is in the range of 20 mass% to 50 mass% with respect to the total mass of the biocide dispersion.
  • the first dendrimer polyol and the second dendrimer polyol is at least one selected from the group consisting of polycarbonate dendrimer polyol, polyester dendrimer polyol, and combinations thereof.
  • polycarbonate dendrimer polyol as a first dendrimer polyol is present in an amount in the range of 25 mass% to 40 mass% with respect to the total mass of the biocide dispersion.
  • the predetermined amount of the algicide is in the range of 2 mass% to 8 mass% with respect to the total mass of the biocide dispersion.
  • the algicide is at least one selected from the group consisting of 3 -(3, 4-dichlorophenyl)- 1,1 -dimethylurea, iodopropynyl butylcarbamate, 2-n-octyl-4- isothiazolin-3-ones, and combinations thereof.
  • the algicide is 3-(3,4-dichlorophenyl)-l,l-dimethylurea in an amount in the range of 3 mass% to 6 mass% with respect to the total mass of the biocide dispersion.
  • the first predetermined speed is in the range of 250 rpm to 500 rpm, and the first predetermined time period is in the range of 2 minutes to 20 minutes.
  • the first predetermined speed is in the range of 230 rpm to 400 rpm, and the first predetermined time period is 3 minutes to 10 minutes.
  • the first fluid medium is at least one selected from the group consisting of acetone, methyl ethyl ketone, diacetone alcohol and combinations thereof.
  • the predetermined amount of the first fluid medium is in the range of 50 mass% to 78 mass% with respect to the total amount of the biocide dispersion.
  • the first fluid medium is acetone in an amount in the range of 55 mass% to 70 mass% with respect to the total mass of the biocide dispersion.
  • the second predetermined speed is in the range of 250 rpm to 500 rpm, and the second predetermined time period is in the range of 5 minutes to 25 minutes.
  • the second predetermined speed is in the range of 300 rpm to 500 rpm, and the second predetermined time period is 10 minutes to 20 minutes.
  • the predetermined amount of the polyurethane dispersion is in the range of 25 mass% to 55 mass% with respect to the total mass of the composition.
  • the homogeneous polyurethane dispersion is selected from water based polyurethane dispersion, anionic aliphatic polyurethane dispersion, cyclo -aliphatic polyurethane dispersions, and combinations thereof.
  • the polyurethane dispersion is water based polyurethane dispersion in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition. In a preferred embodiment, the polyurethane dispersion is water based polyurethane dispersion in an amount in the range of 33 mass% to 48 mass% with respect to the total mass of the composition.
  • the third predetermined speed is in the range of 500 rpm to 1000 rpm, and the third predetermined time period is in the range of 5 minutes to 25 minutes.
  • the third predetermined speed is in the range of 600 rpm to 800 rpm, and the third predetermined time period is in the range of 7 minutes to 20 minutes.
  • the predetermined amount of the carbon nanotubes is in the range of 0.1 mass% to 0.5 mass% with respect to the total mass of the composition.
  • the predetermined amount of the carbon nanotubes is in the range of 0.1 mass% to 0.4 mass% with respect to the total mass of the composition.
  • the predetermined amount of the coupling agent is in the range of 0.5 mass% to 1.5 mass% with respect to the total mass of the composition.
  • the coupling agent is at least one selected from the group consisting of silane, alkoxysilane, epoxy functional silane oligomer, epoxy silane bearing polyfunctional structure bearing gamma-glycidoxy groups, epoxy functional silane oligomer, and combinations thereof.
  • the coupling agent is epoxy silane in an amount in the range of 0.7 mass% to 1.3 mass% with respect to the total mass of the composition.
  • the predetermined amount of the wetting agent is in the range of 0.05 mass% to 0.2 mass% with respect to the total mass of the composition.
  • the wetting agent is an anionic fluorosurfactant.
  • the wetting agent is anionic fluorosurfactant in an amount in the range of 0.09 mass% to 0.18 mass% with respect to the total mass of the composition.
  • the fourth predetermined speed is in the range of 500 rpm to 1000 rpm, and the fourth predetermined time period is in the range of 3 minutes to 15 minutes. In a preferred embodiment, the fourth predetermined speed is in the range of 600 rpm to 900 rpm, and the fourth predetermined time period is in the range of 3 minutes to 10 minutes.
  • the predetermined amount of the hydrophilicity agent is in the range of 25 mass% to 55 mass% with respect to the total mass of the composition.
  • the hydrophilicity agent is at least one selected from the group consisting of colloidal silica, alumina quartz, a combination of colloidal silica and alumina, a combination of colloidal silica and quartz and a combination of alumina and quartz.
  • the hydrophilicity agent is colloidal silica in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition.
  • the hydrophilicity agent is colloidal silica in an amount in the range of 33 mass% to 47 mass% with respect to the total mass of the composition.
  • the predetermined amount of the second fluid medium is in the range of 10 mass% to 20 mass% with respect to the total amount of the composition.
  • the second fluid medium is at least one selected from the group consisting of water, and glycol and a combination of water and glycol.
  • the second fluid medium is water in an amount in the range of 11 mass% to 18 mass% with respect to the total amount of the composition.
  • the second fluid medium is water in an amount in the range of 12 mass% to 16 mass% with respect to the total amount of the composition.
  • the fdm made using the composition of the present disclosure is characterized by having an elongation in the range of 300 % to 500% when measured as per ASTM D 2370 standard, a tensile strength in the range of 10 mPa to 30 mPa when measured as per ASTM D 2370 standard, and sheen @ 60 degree in the range of 10 GU to 30 GU, when measured as per ASTM D 523 standard.
  • the fdm made using the composition of the present disclosure is characterized by having elongation in the range of 320 % to 480%%, when measured as per ASTM D 2370 standard, tensile strength in the range of 11 mPa to 25 mPa%, when measured as per ASTM D 2370 standard, and sheen @ 60 degree in the range of 12 GU to 28 GU, when measured as per ASTM D 523 standard.
  • the fdm made using the composition of the present disclosure is characterized by having elongation in the range of 330% to 450% when measured as per ASTM D 2370 standard, tensile strength in the range of 12 mPa to 22 mPa when measured as per ASTM D 2370 standard, and sheen @ 60 degree in the range of 15 GU to 27 GU sheen @ 60 degree, when measured as per ASTM D 523 standard.
  • FIGURE 1 illustrates test panels demonstrating the crack resistance and sheen retention: (a) a test panel coated with 40% silica and 0.25% coupling agent (not in accordance with the present disclosure), (b) a test panel coated with 40% silica and 0.5% coupling agent (not in accordance with the present disclosure), (c) a test panel coated with 40% silica and 1% coupling agent (in accordance with the present disclosure), (d) a test panel coated with 40% silica and 2% coupling agent (in accordance with the present disclosure), (e) a test panel coated with 50% silica and 0.25% coupling agent (not in accordance with the present disclosure), (f) a test panel coated with 50% silica and 0.5% coupling agent (not in accordance with the present disclosure, (g) a test panel coated with 50% silica and 1% coupling agent (in accordance with the present disclosure), and (h) a test panel coated with 50% silica and 2% coupling agent (in accordance with the present disclosure);
  • FIGURE 2 illustrates test panels demonstrating the streak resistance: (a) test panels coated with premium emulsion paint only (control), and (b) test panels coated with the coating composition of experiment no.1 of the present disclosure over the premium emulsion paint;
  • FIGURE 3 illustrates test panels demonstrating the streak resistance: (a) test panels coated with premium emulsion paint only (control), and (b) test panels coated with the coating composition of experiment no. 2 of the present disclosure over the premium emulsion paint coat;
  • FIGURE 4 illustrates test panels demonstrating the dirt pick up resistant (DPUR) performance after 2 years of natural exposure: (a) test panel coated with exterior premium emulsion paint only (control), (b) test panel coated with the coating composition of experiment no. 1 of the present disclosure over the exterior premium emulsion paint, and (c) test panel coated with the commercial clear (silica acrylic hybrid clear coat) coat over the exterior premium emulsion paint (control 1);
  • DPUR dirt pick up resistant
  • FIGURE 5 illustrates test panels demonstrating the dirt pick up resistant (DPUR) performance after 2 years of natural exposure: (a) test panel coated with exterior premium emulsion paint only (control), (b) test panel coated with the coating composition of experiment no. 2 of the present disclosure over the exterior premium emulsion paint, and (c) test panel coated with the commercial clear (silica acrylic hybrid clear coat) coat over the exterior premium emulsion paint (control 1);
  • FIGURE 6 illustrates test walls demonstrating the horizontal dirt pick up resistant (DPUR) performance after natural exposure of 10 months including one full monsoon: (a) test wall coated with exterior premium emulsion paint only (control), (b) test wall coated with the coating composition of experiment no. 1 of the present disclosure over the exterior premium emulsion paint, and (c) test wall coated with the commercial clear (silica acrylic hybrid clear coat) coat over the exterior premium emulsion paint (control 1); and
  • FIGURE 7 illustrates test walls demonstrating the vertical dirt pick up resistant (DPUR) performance after natural exposure of 10 months including one full monsoon: (a) test wall coated with exterior premium emulsion paint only (control), (b) test wall coated with the coating composition of experiment no. 1 of the present disclosure over the exterior premium emulsion paint, and (c) test wall coated with the commercial clear (silica acrylic hybrid clear coat) coat over the exterior premium emulsion paint (control 1).
  • DPUR vertical dirt pick up resistant
  • the present disclosure relates to a coating composition and a process for the preparation of the same.
  • Embodiments of the present disclosure will now be described with reference to the accompanying drawing. Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details, are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
  • first, second, third, etc. should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
  • Coatings are widely used in various applications such as automotive, construction, architecture, wood industries, and the like.
  • the coatings are used for decorative as well as protective purposes.
  • the coatings when applied on the substrate are exposed to environmental conditions such as wind, UV light, rain, haze, and the like. Due to continuous exposure to such environmental conditions, the coatings undergo the phenomenon of discolouration, chalking, peeling, contamination and the like.
  • the coatings are exposed to various environmental contaminants such as organic and inorganic dust, dirt, pollutants, moisture, and the like. These environmental contaminants are suspended in the air and accumulate on the surface of outdoor structures. These accumulated contaminants are either washed away by rainwater or carried by rainwater when it rains and flows down on the surface of outdoor structures.
  • the present disclosure provides a coating composition and a process for its preparation.
  • the present disclosure provides a coating composition.
  • the coating composition comprises:
  • the coating composition comprises biocide dispersion in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises biocide dispersion in an amount of 4 mass% with respect to the total mass of the composition.
  • the biocide dispersion comprises at least one first dendrimer polyol in an amount in the range of 20 mass% to 50 mass% with respect to the total mass of the biocide dispersion.
  • the dendrimer polyol is present in an amount of 31.83 mass% with respect to the total mass of the biocide dispersion.
  • the first dendrimer polyol is at least one selected from the group consisting of polycarbonate dendrimer polyol, polyester dendrimer polyol and combinations thereof.
  • the first polymeric dendrimer compound is polycarbonate dendrimer polyol (Quickstar 384X).
  • the dendrimer polyol functions as a dispersion aid. It encapsulates the algicide and helps in enhancing the hydrophilicity and flexibility of the coating composition.
  • the dendrimer polyol facilitates the biocide dispersion without compromising the hydrophilicity and improves the flexibility of the coating.
  • the biocide dispersion comprises the algicide in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the biocide dispersion. In an exemplary embodiment of the present disclosure, the algicide is present in an amount of 4.5 mass% with respect to the total mass of the biocide dispersion.
  • the biocide dispersion comprises the first fluid medium in an amount in the range of 50 mass% to 78 mass% with respect to the total mass of the biocide dispersion.
  • the first fluid medium is present in an amount of 63.67 mass% with respect to the total mass of the biocide dispersion.
  • the biocide dispersion comprises polycarbonate dendrimer polyol as a first dendrimer polyol in an amount in the range of 25 mass% to 40 mass% with respect to the total mass of the biocide dispersion, 3-(3,4-dichlorophenyl)-l,l- dimethylurea as an algicide in an amount in the range of 3 mass% to 6 mass% with respect to the total mass of the biocide dispersion; and acetone as a first fluid medium in an amount in the range of 55 mass% to 70 mass% with respect to the total mass of the biocide dispersion.
  • the coating composition comprises polyurethane dispersion in an amount in the range of 25 mass% to 55 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises polyurethane dispersion in an amount of 44 mass% with respect to the total mass of the composition. In another exemplary embodiment of the present disclosure, the coating composition comprises polyurethane dispersion in an amount of 36.35 mass% with respect to the total mass of the composition.
  • the coating composition comprises carbon nanotubes in an amount in the range of 0.1 mass% to 0.5 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises carbon nanotubes in an amount of 0.3 mass% with respect to the total mass of the composition.
  • the coating composition comprises coupling agent in an amount in the range of 0.5 mass% to 1.5 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises a coupling agent in an amount of 1 mass% with respect to the total mass of the composition.
  • the coating composition comprises a wetting agent in an amount in the range of 0.05 mass% to 0.2 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises a coupling agent in an amount of 0.15 mass% with respect to the total mass of the composition.
  • the coating composition comprises hydrophilicity agent in an amount in the range 25 mass% to 55 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises hydrophilicity agent in an amount of 35.4 mass% with respect to the total mass of the composition. In an another exemplary embodiment of the present disclosure, the coating composition comprises hydrophilicity agent in an amount of 44.5 mass% with respect to the total mass of the composition.
  • the coating composition comprises at least one second fluid medium in an amount in the range 10 mass% to 20 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises second fluid medium in an amount of 15.15 mass% with respect to the total mass of the composition. In an another exemplary embodiment of the present disclosure, the coating composition comprises second fluid medium in an amount of 13.1 mass% with respect to the total mass of the composition.
  • the algicide is at least one selected from the group consisting of 3-(3,4-dichlorophenyl)-l,l-dimethylurea (Diuron/Preventol A6), iodopropynyl butylcarbamate, and 2-n-Octyl-4-isothiazolin-3-ones, and combinations thereof.
  • the algicide is 3-(3,4- dichlorophenyl) -1,1 -dimethylurea.
  • iodopropynyl butylcarbamate, and 2-n-Octyl-4-isothiazolin-3-ones, and combinations thereof also gives similar prevention from algal growth.
  • Algicide prevents algal growth in the exterior coating composition.
  • the first fluid medium is at least one selected from the group consisting of acetone, methyl ethyl ketone, and diacetone alcohol, and combinations thereof.
  • the first fluid medium is acetone.
  • the first fluid medium along with the polymeric dendrimer compound helps in the uniform dispersion of algicide.
  • methyl ethyl ketone, diacetone alcohol, and combinations thereof, as the first fluid medium along with the first polymeric dendrimer compound provide similar uniform dispersion of algicide.
  • the polyurethane dispersion is selected from water based polyurethane dispersion (KamthaneK-164PP), anionic aliphatic polyurethane dispersion (Bayhydrol UH 2606), cyclo-aliphatic polyurethane dispersions, and combinations thereof.
  • the polyurethane dispersion is water based polyurethane dispersion.
  • the biocide dispersion comprises polycarbonate dendrimer polyol as a first dendrimer polyol in an amount in the range of 25 mass% to 40 mass% with respect to the total mass of the biocide dispersion, 3-(3,4-dichlorophenyl)-l,l- dimethylurea as an algicide in an amount in the range of 3 mass% to 6 mass% with respect to the total mass of the biocide dispersion, and acetone as a first fluid medium in an amount in the range of 55 mass% to 70 mass% with respect to the total mass of the biocide dispersion.
  • the polyurethane dispersion enhances the binding, adhesion, mechanical strength, water resistance, alkali resistance and film forming properties of the coating composition.
  • the coupling agent is at least one selected from the group consisting of silane, alkoxysilane, epoxy functional silane oligomer, epoxy silane bearing polyfunctional structure bearing gamma-glycidoxy groups (CoatOSil MP 200), epoxy functional silane oligomer (CoatOSil MP 400) and combinations thereof.
  • the coupling agent is epoxy silane bearing polyfunctional structure bearing gamma-glycidoxy groups.
  • the coupling agent disperses easily due to its hydrophilic nature. Further, the coupling agent helps in crosslinking with the polyurethane dispersion and crack prevention.
  • the coupling agent has oxirane functionality (apart from the alcoxy functionality) which reacts with carboxy functionality of the polyurethane dispersion.
  • the coupling agent can be easily incorporated into an aqueous system.
  • the wetting agent is an anionic fluorosurfactant. In an exemplary embodiment of the present disclosure, the wetting agent is anionic fluorosurfactant.
  • the wetting agent is used for substrate wetting.
  • the hydrophilicity agent is at least one selected from the group consisting of colloidal silica (Levasil CC 301), alumina (aluminium oxide), quartz and combinations thereof.
  • the hydrophilicity agent is colloidal silica.
  • the colloidal silica comprises about 28% solids by weight having a particle size in the range of 4 nm to 10 nm.
  • the second fluid medium is at least one selected from the group consisting of water, glycol and a combination of water and glycol.
  • the second fluid medium is water.
  • the second fluid medium is a mixture of water and glycol.
  • the coating composition comprises at least one light stabilizer.
  • the light stabilizer is selected from non-basic aminoether (NOR) hindered amine light stabilizer (HALS) (Tinuvin 123 DW). In an exemplary embodiment of the present disclosure, the light stabilizer is Tinuvin 123 DW.
  • NOR non-basic aminoether
  • HALS hindered amine light stabilizer
  • Tinuvin 123 DW Tinuvin 123 DW.
  • the coating composition comprises at least one UV absorber.
  • the UV absorber is selected from an aqueous dispersion of a 2-hydroxy-phenyl-s-triazine (HPT) (Tinuvin 400 DW). In an exemplary embodiment of the present disclosure, the UV absorber is Tinuvin 400 DW.
  • HPT 2-hydroxy-phenyl-s-triazine
  • the coating composition comprises light stabilizer in an amount in the range 0 mass% to 1 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises light stabilizer in an amount of 0.3 mass% with respect to the total mass of the composition.
  • the coating composition comprises a UV absorber in an amount in the range 0 mass% to 2 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the coating composition comprises UV absorber in an amount of 0.5 mass% with respect to the total mass of the composition.
  • the composition comprises the biocide dispersion in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition, water based polyurethane dispersion in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition, carbon nanotubes in an amount in the range of 0.
  • the composition comprises the biocide dispersion in an amount in the range of 2 mass% to 8 mass% with respect to the total mass of the composition, water based polyurethane dispersion in an amount in the range of 33 mass% to 48 mass% with respect to the total mass of the composition, carbon nanotubes in an amount in the range of 0.
  • the composition further comprises a second dendrimer polyol in an amount in the range of 0 mass% to 5 mass% with respect to the total mass of the composition.
  • the composition comprises a second dendrimer polyol in an amount in the range of 0.2 mass% to 5 mass% with respect to the total mass of the composition.
  • the composition comprises a second dendrimer polyol in an amount of 0.6 mass%.
  • a film is prepared using the coating composition of the present disclosure.
  • any conventional process may be used.
  • the fdm prepared using the coating composition of the present disclosure has a thickness in the range of 20 microns to 50 microns, when measured as per ASTM D6132-13(2017) standard.
  • the fdm has a thickness in the range of 20 microns to 40 microns, when measured as per ASTM D6132-13(2017) standard.
  • a fdm prepared using the coating composition and having a thickness in the range of 20 microns to 50 microns ( when measured as per ASTM D6132-13(2017) standard) is characterized by having:
  • sheen @ 60 degree head by glossometer is in the range of 10 GU to 30 GU (gloss units) , when measured as per ASTM D 523 standard.
  • the fdm is characterized by having:
  • the fdm is characterized by having:
  • the fdm prepared by using the coating composition is characterized by having elongation of 354%%, when measured as per ASTM D 2370 standard, tensile strength of 21.5 mPa%, when measured as per ASTM D 2370 standard and sheen @ 60 degree head by glossometer of 25.2 GU, when measured as per ASTM D 523 standard.
  • the film prepared by using the coating composition is characterized by having elongation of 425%, tensile strength of 14.5 mPa and sheen @ 60 degree head by glossometer of 17.4 GU, when measured as per ASTM D 523 standard.
  • the present disclosure provides a process for the preparation of a coating composition.
  • the process for the preparation of coating composition comprises the following steps:
  • a predetermined amount of at least one first dendrimer polyol and a predetermined amount of at least one algicide are mixed under stirring at a first predetermined speed for a first predetermined time period to obtain a first mixture.
  • the predetermined amount of the first dendrimer polyol is in the range of 20 mass% to 50 mass% with respect to the total mass of the biocide dispersion. In an exemplary embodiment of the present disclosure, the predetermined amount of the dendrimer polyol is 31.83 mass% with respect to the total mass of the biocide dispersion.
  • the first dendrimer polyol is at least one selected from the group consisting of polycarbonate dendrimer polyol, polyester dendrimer polyol, and combinations thereof.
  • the dendrimer polyol is polycarbonate dendrimer polyol.
  • the first dendrimer polyol is polycarbonate dendrimer polyol in an amount in the range of 25 mass% to 40 mass% with respect to the total mass of the biocide dispersion.
  • the predetermined amount of the algicide is in the range of 2 mass% to 8 mass% with respect to the total mass of the biocide dispersion. In an exemplary embodiment of the present disclosure, the predetermined amount of the algicide is 4.5 mass% with respect to the total mass of the biocide dispersion.
  • the algicide is at least one selected from the group consisting of polycarbonate dendrimer 3 -(3 ,4-dichlorophenyl)- 1,1 -dimethylurea, iodopropynyl butylcarbamate, 2-n-octyl-4-isothiazolin-3-ones and combinations thereof.
  • the algicide is polycarbonate dendrimer 3- (3 ,4-dichlorophenyl)- 1 , 1 -dimethylurea.
  • the algicide is 3-(3,4-dichlorophenyl)-l,l- dimethylurea in an amount in the range of 3 mass% to 6 mass% with respect to the total mass of the biocide dispersion.
  • the first predetermined speed is in the range of 250 rpm to 500 rpm. In an exemplary embodiment of the present disclosure, the first predetermined speed is 300 rpm.
  • the first predetermined time period is in the range of 2 minutes to 20 minutes. In an exemplary embodiment of the present disclosure, the first predetermined time period is 5 minutes.
  • the first predetermined speed is in the range of 230 rpm to 400 rpm; and the first predetermined time period is 3 minutes to 10 minutes.
  • a first fluid medium is added to first mixture under stirring at a second predetermined speed for a second predetermined time period to obtain a biocide dispersion.
  • first fluid medium is at least one selected from the group consisting of acetone, methyl ethyl ketone, diacetone alcohol, and combinations thereof.
  • the first fluid medium is acetone.
  • the predetermined amount of the first fluid medium is in the range of 50 mass% to 78 mass% with respect to the total amount of the biocide dispersion.
  • the first fluid medium is acetone in an amount in the range of 55 mass% to 70 mass% with respect to the total mass of the biocide dispersion.
  • the second predetermined speed is in the range of 250 rpm to 500 rpm. In another embodiment of the present disclosure, the second predetermined speed is in the range of 300 rpm to 500 rpm. In an exemplary embodiment of the present disclosure, the second predetermined speed is 350 rpm.
  • the second predetermined time period is in the range of 5 minutes to 25 minutes. In another embodiment, the second predetermined time period is 10 minutes to 20 minutes. In an exemplary embodiment of the present disclosure, the second predetermined time period is 15 minutes.
  • the biocide dispersion and a homogeneous polyurethane dispersion are mixed under stirring at a third predetermined speed for a third predetermined time period to obtain a second mixture.
  • the predetermined amount of polyurethane dispersion is in an amount in the range of 25 mass% to 55 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the predetermined amount of homogeneous polyurethane dispersion is 44 mass% with respect to the total mass of the composition. In another exemplary embodiment of the present disclosure, the predetermined amount of homogeneous polyurethane dispersion is 36.35 mass% with respect to the total mass of the composition.
  • the polyurethane dispersion is water based polyurethane dispersion in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition.
  • the polyurethane dispersion is water based polyurethane dispersion in an amount in the range of 33 mass% to 48 mass% with respect to the total mass of the composition.
  • the polyurethane dispersion is selected from water based polyurethane dispersion, anionic aliphatic polyurethane dispersion, cycloaliphatic polyurethane dispersions, and combinations thereof.
  • the homogeneous polyurethane dispersion is water based polyurethane dispersion.
  • the third predetermined speed is in the range of 500 rpm to 1000 rpm. In another embodiment of the present disclosure, the third predetermined speed is in the range of 600 rpm to 800 rpm. In an exemplary embodiment of the present disclosure, the third predetermined speed is 750 rpm.
  • the third predetermined time period is in the range of 5 minutes to 25 minutes. In another embodiment, the third predetermined time period is in the range of 7 minutes to 20 minutes. In an exemplary embodiment of the present disclosure, the third predetermined time period is 15 minutes.
  • a predetermined amounts of carbon nanotubes, at least one coupling agent, at least one wetting agent are added into the second mixture under stirring at a fourth predetermined speed for a fourth predetermined time period to obtain a third mixture.
  • the carbon nanoparticle enhances the surface polarity and hydrophilicity of the coating composition.
  • These are single wall carbon nanotubes with carbon content of > 85%, CNT content of > 75%, an outer mean diameter of 1.8 nm, and length of 5 microns.
  • the carbon nanotubes are Tuball coat E H 2 O 0.4% from OCSiAl.
  • the predetermined amount of the carbon nanotubes is in the range of 0.1 mass% to 0.5 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the predetermined amount of the carbon nanotubes is 0.3 mass% with respect to the total mass of the composition.
  • the predetermined amount of the carbon nanotubes are the range of 0.1 mass% to 0.4 mass% with respect to the total mass of the composition.
  • the predetermined amount of the coupling agent is in the range of 0.5 mass% to 1.5 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the predetermined amount of the coupling agent is 1 mass% with respect to the total mass of the composition.
  • the coupling agent is at least one selected from the group consisting of silane, alkoxysilane, epoxy silane, epoxy functional silane oligomer and epoxy silane bearing polyfunctional structure bearing gamma-glycidoxy groups.
  • the coupling agent is epoxy silane.
  • the coupling agent is epoxy silane in an amount in the range of 0.7 mass% to 1.3 mass% with respect to the total mass of the composition.
  • the predetermined amount of the wetting agent is in the range of 0.05 mass% to 0.2 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the predetermined amount of the wetting agent is 0.15 mass% with respect to the total mass of the composition.
  • the wetting agent is an anionic fluorosurfactant. In an exemplary embodiment of the present disclosure, the wetting agent is an anionic fluorosurfactant.
  • the wetting agent is an anionic fluorosurfactant in an amount in the range of 0.09 mass% to 0.18 mass% with respect to the total mass of the composition.
  • the fourth predetermined speed is in the range of 500 rpm to 1000 rpm. In another embodiment of the present disclosure, the fourth predetermined speed is in the range of 600 rpm to 900 rpm. In an exemplary embodiment of the present disclosure, the fourth predetermined speed is 750 rpm.
  • the fourth predetermined time period is in the range of 3 minutes to 15 minutes. In another embodiment, the fourth predetermined time period is in the range of 3 minutes to 10 minutes. In an exemplary embodiment of the present disclosure, the fourth predetermined time period is 5 minutes.
  • a predetermined amount of at least one hydrophilicity agent is added into the third mixture followed by lowering the stirring speed in the range of 200 rpm to 500 rpm to obtain a fourth mixture.
  • the predetermined amount of the hydrophilicity agent is in the range of 25 mass% to 55 mass% with respect to the total mass of the composition. In an exemplary embodiment of the present disclosure, the predetermined amount of the hydrophilicity agent is 35.4 mass% with respect to the total mass of the composition. In an another exemplary embodiment of the present disclosure, the predetermined amount of the hydrophilicity agent is 44.5 mass% with respect to the total mass of the composition
  • the hydrophilicity agent is at least one selected from the group consisting of colloidal silica, alumina (aluminium oxide) alumina, quartz, a combination of colloidal silica and alumina, a combination of colloidal silica and quartz and a combination of alumina and quartz.
  • the hydrophilicity agent is colloidal silica.
  • the hydrophilicity agent is colloidal silica in an amount in the range of 30 mass% to 50 mass% with respect to the total mass of the composition.
  • the hydrophilicity agent is colloidal silica in an amount in the range of 33 mass% to 47 mass% with respect to the total mass of the composition.
  • the predetermined amount of the second fluid medium is in the range of 10 mass% to 20 mass% with respect to the total amount of the composition.
  • a second fluid medium is mixed with the fourth mixture to obtain the coating composition.
  • the second fluid medium is at least one selected from the group consisting of water, glycol and a combination of water and glycol. In an exemplary embodiment of the present disclosure, the second fluid medium is a mixture of water and glycol.
  • the second fluid medium is water in an amount in the range of 11 mass% to 18 mass% with respect to the total amount of the composition.
  • the second fluid medium is water in an amount in the range of 12 mass% to 16 mass% with respect to the total amount of the composition.
  • the coating composition of the present disclosure is water based, and therefore for specific applications, suitable consistency can be adjusted by diluting the composition with water.
  • the coating composition of the present disclosure provides dirt pick up resistance (DPUR) and streak resistance on the applied substrate.
  • the coating composition provides enhanced hydrophilicity and surface hardness.
  • the dendrimer polyol also facilitates biocide dispersion without compromising the hydrophilicity and improves the flexibility of the coating. Therefore, the coating composition of the present disclosure provides sustained dirt pick up resistance and streak resistance for exterior systems where the conventional coatings do not meet the desired performance.
  • the coating composition of the present disclosure forms the coating on a variety of architectural surfaces like masonry, stucco, brick, cement plaster, wood, painted surfaces, and the like and imparts desired hydrophilicity and water wettability to overcome the dirt streaks formation on the resulting surface.
  • the coating composition when applied to architectural surfaces like masonry, stucco, brick, cement plaster, wood, painted surfaces and the like can resist dirt pick up and facilitates dirt cleaning with water washing or rainwater washing for a sustained clean look.
  • the coating composition is optically neutral and hence does not negatively affect the colour or shade of the substrate/undercoat/ underneath coat.
  • the coating composition is unique where it enables the significant loading of surface hydrophilicity agent (colloidal silica) in an amount in the range of 40 mass % to 50 mass % based on the mass of dry film without the crack formation when applied at a specified dry film thickness and obtain the desired performances.
  • surface hydrophilicity agent colloidal silica
  • the specific dry film thickness is in the range of 20 microns to 50 microns, when measured as per ASTM D6132-13(2017) standard. Despite high hydrophilicity, it shows very good water whitening/blanching resistance.
  • the coating composition with high content of surface hydrophilicity agent (Colloidal silica) enables improved durability as measured by sheen retention in QUVB (Accelerated Weathering Tester) exposure, thus providing better durability performance on the exterior exposure.
  • the coating composition has specific biocide dispersion by using the dendrimer polyol which facilitates easy incorporation of the biocide without compromising the hydrophilicity and improves the crack resistance and flexibility simultaneously.
  • Experiment no 1 Process for the preparation of the coating composition in accordance with the present disclosure.
  • Step 1 Preparation of the biocide dispersion in accordance with the present disclosure.
  • Step 2 Preparation of the coating composition in accordance with the present disclosure. 220 gm of water based polyurethane dispersion ((KamthaneK-164PP) (polyurethane dispersion)) was charged into a reactor and stirred at a speed of 750 rpm for 15 minutes to obtain a homogeneous polyurethane dispersion.
  • water based polyurethane dispersion (KamthaneK-164PP) (polyurethane dispersion)
  • step 1 20 gm of biocide dispersion (3 -(3, 4-dichlorophenyl)- 1,1 -dimethylurea dispersion) obtained in step 1 was added to the homogeneous polyurethane dispersion under stirring at a speed of 750 rpm (third predetermined speed) for 10 minutes (third predetermined time period) to obtain a second mixture.
  • Experiment no 2 Process for the preparation of the coating composition in accordance with the present disclosure.
  • Step 1 Preparation of the biocide dispersion in accordance with the present disclosure.
  • the biocide dispersion was prepared in a similar manner as prepared in step 1 of experiment 1.
  • Step 2 Preparation of the coating composition in accordance with the present disclosure.
  • the coating composition was prepared in the similar manner as prepared in step 2 of experiment 1 except additional 3 gm of polycarbonate polyol dendrimer (Quickstar 384X) (dendrimer polyol) was added along with the other components in the second mixture to obtain the third mixture.
  • Table 2 illustrates the coating composition of experiments 1 and 2.
  • Table 2 Coating compositions of experiment 1 and experiment 2.
  • the biocide dispersion prepared in step 1 of experiment 1 was kept in a hot box at 55 °C for 15 days and assessed for any phase separation or particle formation. The phase separation or particle formation was not observed. The dispersion was found to be satisfactory showing good shelf stability.
  • ii) Characterization/E valuation of the Coating composition prepared in accordance with the present disclosure Cement composite test panels and glass test panels were used for the characterization/evaluation of the coating composition prepared in accordance with the present disclosure.
  • a first coat of commercial premium quality emulsion paint was applied on a 6 inch X 3 inch size cement composite panels followed by drying for 4 hours to obtain a panel coated with the first coat.
  • a second coat of the commercial premium quality emulsion paint was applied on the panel coated with the first coat and dried for 4 hours to obtain a panel coated with the second coat (control).
  • a coat of silica acrylic hybrid clear coat was applied on the panel coated with the second coat to obtain a panel coated with silica acrylic hybrid clear coat (control 1).
  • a coat of the coating composition prepared in accordance with the present disclosure (Experiment no 1/experiment no 2) was applied on the panel coated with the second coat and were allowed to cure for 7 days.
  • the curing for 7 days was done by air drying which ensures the respective crosslinking of the silanes groups/ oxirane group and carboxy group to have mechanically robust cured fdm having a thickness in the range of 20 microns to 50 microns, when measured as per ASTM D6132-13(2017) standard, and to obtain the cement composite test panels.
  • a 6 inch X 3 inch glass test panels were prepared by following the similar procedure which was used to obtain the cement composite test panels.
  • the glass panel coated with the first coat and the second coat of the premium quality emulsion paint followed by a coat of silica acrylic hybrid clear coat were referred as control 2.
  • the panels had a thickness in the range of 20 microns to 50 microns, when measured as per ASTM D6132-13(2017) standard.
  • the cement composite test panels and the glass test panels were subjected to the evaluation of the following properties:
  • the sheen and water resistance were evaluated on the cement composite test panels.
  • the results are demonstrated in table 3.
  • the water contact angle and di-iodomethane contact angle were evaluated on the glass test panels.
  • the results are demonstrated in table 3.
  • the glass test panels were scrapped to obtain a scrapped layer of coating/film of the coating composition of the present disclosure.
  • the silica percentage was evaluated on the so obtained scrapped layer of coating/film of the coating composition of the present disclosure by using TGA (thermogravimetric analysis). The results are demonstrated in table 3.
  • Table 3 demonstrates the results of the characterization/evaluation study of the coating composition. Sr.no
  • sheen of the coating composition of experiment 1 and experiment no 2 which were prepared in accordance with the present disclosure is 25.2 GU and 17.4 GU whereas the sheen of control is very high i.e. 42.7 GU, when measured as per ASTM D 523 standard.
  • Sheen is the optical property of an exterior paint system. Typically, low sheen paints have the sheen values in the range of 10 GU to 20 GU whereas high sheen paints will have the sheen values in the range of 20 GU to 30 GU, when measured as per ASTM D 523 standard. Very high sheen might make the underneath undulations visible, hence much high sheen is generally avoided on exterior paints.
  • the silica content of the coating composition of experiment 1 and experiment no 2 which were prepared in accordance with the present disclosure was high compared to the silica content of the control.
  • Higher silica content relates to high durability due to inertness to weather conditions.
  • the coating composition of experiment 1 and experiment no 2 which were prepared in accordance with the present disclosure will have high durability as compared to the control 2.
  • the water contact angle of the coating composition of experiment 2 prepared in accordance with the present disclosure was lower as compared to the water contact angle of the control 2.
  • the water contact angle of the coating composition of experiment 2 prepared in accordance with the present disclosure was low due to highest silica content and additional dendrimer polyol which makes the surface hydrophilic so that the dirt accumulated on the surface can get washed off by water easily.
  • methyl ethyl ketone, diacetone alcohol and combinations thereof as polyurethane dispersion, alumina quartz, a combination of colloidal silica and alumina, a combination of colloidal silica and quartz and a combination of alumina and quartz as hydrophilicity agen, and glycol and a combination of water and glycerol as a second fluid medium gave the similar results.
  • the mechanical properties were performed on the cured films of the coating composition of the present disclosure and the silica acrylic hybrid clear coat (control 1) to demonstrate the effect of the dendrimer polyol (polycarbonate dendrimer polyol) (Quickstar 384x).
  • test panels were exposed to the QUV B test conditions to assess the film cracking resistance of the coating composition prepared in accordance with the present disclosure.
  • test panels were exposed to accelerated UV light exposure test with the light average / peak wavelength 313 nm.
  • the results of the cracking resistance of the coating composition prepared in accordance with the present disclosure are demonstrated in table 5.
  • Table 5 Weathering studies and film cracking resistance of the films prepared using the coating composition:
  • Figure 1 illustrates test panels that demonstrate the crack resistance and sheen retention.
  • the cement composite test panels were sprinkled with the measured amount (5gms of mix dust consisting 75 parts of natural dust: 25 parts of carbon black pigment called pigment black 7 /sq.ft) of mixture of the dust (collected from the natural dust accumulated on the terrace and carbon black pigment) to obtain the dust adhered test panels. Water was sprinkled on the so obtained dust adhered test panels to remove/clean the dust and to check if there were streak marks observed during the dust cleaning.
  • FIGS 2 to 3 illustrate test panels that demonstrate the streak resistance.
  • the cement composite test panels were kept on terrace on a metal framed cabinet at 45° angle facing south.
  • Figure 4 and 5 illustrates test panels demonstrating the dirt pick up resistant (DPUR) performance after 1 year natural exposure.
  • test panel coated with the coating composition of experiment 1 comprising 40% silica
  • the test panel coated with the coating composition of experiment 1 demonstrated best dirt pick up resistance and sustained dirt pick up resistance as compared to Figure 4 (a) (test panel coated with exterior premium emulsion paint only (control)) and figure 4 (c) (test panel coated with commercial silica acrylic hybrid clear coat procured from market (control 1)).
  • the first coat of exterior premium emulsion paint was applied on the test wall at Turbhe, Navi Mumbai (MH) India, to obtain a test wall coated with the first coat.
  • a second coat of exterior premium emulsion paint was applied on the test wall coated with the first coat to obtain a test wall coated with the second coat.
  • the so obtained test wall coated with the second coat was coated with a coat of the coating composition obtained in the experiment 1 of the present disclosure to obtain the actual test wall.
  • the actual test wall was subjected for DPUR study.
  • the DPUR study was performed by allowing the actual test wall to get exposed to natural weathering for 10 months.
  • the actual test wall was having the vertical and horizontal areas which can be observed for the relative dirt accumulation overtime.
  • Figure 6 illustrates test walls demonstrating the horizontal dirt pick up resistant (DPUR) performance after natural exposure of 10 months including one full monsoon.
  • DPUR horizontal dirt pick up resistant
  • the horizontal areas are more prone to dirt accumulation hence this give accelerated test condition to discriminate the performances.
  • the coatings showing better dirt pick up resistance performance are supposed to be good in terms of the streak resistance as well due to lower dirt that will be running on the wall when first showering of monsoon happens.
  • Figure 7 illustrates test walls demonstrating the vertical dirt pick up resistant (DPUR) performance after natural exposure of 10 months including one full monsoon.
  • DPUR vertical dirt pick up resistant
  • test wall coated with the coating composition of experiment 1 of the present disclosure over the exterior premium emulsion paint had very low dirt accumulation as compared to the figure 7(a) (test wall coated with only exterior premium emulsion paint (control)) and figure 7(c) (test wall coated with silica acrylic hybrid clear coat (control 1)).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente divulgation concerne une composition de revêtement et un procédé permettant sa préparation. La composition de revêtement de la présente divulgation présente une résistance améliorée à la rayure, une résistance à l'encrassement (DPUR) améliorée, une meilleure résistance aux craquelures et une souplesse améliorée ; et présente un caractère hydrophile relativement élevé. En outre, la composition de revêtement de la présente divulgation convient à toute une gamme de surfaces architecturales telles que la maçonnerie, le stuc, la brique, le plâtre pour enduit dur, le bois, les surfaces peintes et analogues. Le procédé de préparation de la composition de revêtement de la présente divulgation est simple et économique.
PCT/IB2023/053231 2022-03-31 2023-03-31 Composition de revêtement et procédé permettant sa préparation Ceased WO2023187731A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202221019624 2022-03-31
IN202221019624 2022-03-31

Publications (1)

Publication Number Publication Date
WO2023187731A1 true WO2023187731A1 (fr) 2023-10-05

Family

ID=88199550

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2023/053231 Ceased WO2023187731A1 (fr) 2022-03-31 2023-03-31 Composition de revêtement et procédé permettant sa préparation

Country Status (1)

Country Link
WO (1) WO2023187731A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013028135A1 (fr) * 2011-08-23 2013-02-28 Nipsea Technologies Pte Ltd Composition de revêtement haute performance
US20140141263A1 (en) * 2011-06-21 2014-05-22 Akzo Nobel Coatings International B.V. Biocidal foul release coating systems
US9242897B2 (en) * 2009-05-18 2016-01-26 Ppg Industries Ohio, Inc. Aqueous dispersions and methods of making same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9242897B2 (en) * 2009-05-18 2016-01-26 Ppg Industries Ohio, Inc. Aqueous dispersions and methods of making same
US20140141263A1 (en) * 2011-06-21 2014-05-22 Akzo Nobel Coatings International B.V. Biocidal foul release coating systems
WO2013028135A1 (fr) * 2011-08-23 2013-02-28 Nipsea Technologies Pte Ltd Composition de revêtement haute performance

Similar Documents

Publication Publication Date Title
DE69724224T2 (de) Anti-fouling Trennschicht-Zusammensetzung und beschichtete Gegenstände
CZ301192B6 (cs) Formovací nebo nanášecí materiál a jeho použití
KR102013508B1 (ko) 코팅 적용을 위한 엘라스토머 실리콘 에멀전
WO1998022547A1 (fr) Composition de revetement non salissant
WO2005063899A1 (fr) Composition de revetement aqueuse
CA2513972A1 (fr) Compositions de revetement obtenues grace a la nanotechnologie et methodes pour les produire
US10301477B2 (en) Superhydrophilic coating composition
CN103666150A (zh) 一种防霉抗藻纯丙乳液外墙涂料
CN102391736A (zh) 一种建筑幕墙铝单板用自洁涂料及其制备方法
JP2005015727A (ja) 撥水性被膜形成組成物及びそれを用いた塗装方法
CN100436551C (zh) 水性涂料组合物
KR100649759B1 (ko) 비오염성 불소계 피막조성물
KR102225331B1 (ko) 구조물의 도장 방법
WO2023187731A1 (fr) Composition de revêtement et procédé permettant sa préparation
JP2013006898A (ja) 熱線高反射塗料組成物、熱線高反射塗料組成物調製用キット、熱線高反射塗装物、および熱線高反射塗装物の製造方法
KR102300388B1 (ko) 탄소섬유 복합재를 포함하는 내구성, 내열성 및 차열성능이 향상된 우레탄 도막 방수재
JP2019183043A (ja) 水性被覆材
JP2945949B2 (ja) 常温硬化可能な塗布用ゾル組成物とそれを用いた含フッ素共重合体・シリカガラスハイブリッド体の製法
KR100484291B1 (ko) 내구성및비오염성이개선된자연건조형불소계피막조성물
DE19921876A1 (de) Form- oder Beschichtungsmaterial und dessen Verwendung
KR100608334B1 (ko) 비오염성 고온소부형 불소도료 조성물
JP2002036442A (ja) 高耐久性塗膜構成体
JP2002235035A (ja) 塗料組成物
KR101080325B1 (ko) 건축물 외벽 수성도료용 오염방지제 조성물 및 그 제조방법
JP2004161894A (ja) 水性低汚染塗料組成物

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23778646

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23778646

Country of ref document: EP

Kind code of ref document: A1