Silicone-modified polyurea coating composition

Abstract

The coating composition may combine durability and stain resistance with reduced environmental emissions and health risks. The coating composition comprises an isocyanate component, an amine-functional resin including an aspartic amine, a reactive silicone component having a molecular weight of at least 500, and TiO in an amount of at least 5 wt.%. 2 The coating composition may further comprise a cure inhibitor in an amount of at least 5 wt.% and a solvent in an amount of up to 20 wt.%.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to U.S. Provisional Application No. 63 / 366,103, filed June 9, 2022, which is incorporated herein by reference in its entirety for all purposes.

[0002] Described herein are coating compositions for application to a substrate and methods of coating a substrate. [Background technology]

[0003] Molded substrates such as swimming pools, bathtubs, turbine blades, marine components, precast concrete, and prefabricated structural components can be susceptible to damage such as cracking and chipping due to the brittleness of some polymeric materials used in one or more layers of the substrate. The appearance of molded substrates made from conventional polymeric materials can become stained or otherwise diminished from exposure to chemical materials and environmental conditions. Summary of the Invention

[0004] The present disclosure is directed to a coating composition. The coating composition may include an isocyanate component, an amine-functional resin including an aspartic acid ester, a reactive silicone component having a molecular weight of at least 500, and TiO in an amount of at least 5 wt%. The coating composition may include an isocyanate component, an amine-functional resin including an aspartic acid ester, a reactive silicone component having a molecular weight of at least 500, TiO in an amount of at least 5 wt%, a cure inhibitor in an amount of at least 5 wt%, and a solvent in an amount of up to 20 wt%.

[0005] The present disclosure is also directed to methods for coating substrates and repairing articles. The methods can include applying a coating composition described herein to at least a portion of a substrate. A method for repairing an article including a first coating can include applying a coating composition described herein to at least a portion of the article. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a schematic diagram of the open molding process.

[0007] [Figure 2] FIG. 2 is a schematic diagram of the closed molding process. DETAILED DESCRIPTION OF THE INVENTION

[0008] Provided herein are coating compositions and methods that can be applied to substrates for improved performance. The present disclosure relates to polyurea coating compositions that can combine durability and stain resistance with reduced environmental emissions and health risks. Unlike traditional unsaturated polyester coatings, the coating compositions described herein may be peroxide-free and volatile organic chemical (VOC)-free. In some cases, the coating compositions described herein may be rapidly formed and may be applied using automated processes, which may result in lower costs and improved product quality.

[0009] Conventional coatings, such as polyester and epoxy coatings, may have low impact resistance, experience high levels of shrinkage, and / or may not be able to prevent or minimize staining. The polyurea coating compositions described herein may demonstrate extended durability and desirable properties, such as stain resistance, impact resistance, and low shrinkage, while providing a high gloss finish with UV protection.

[0010] Described herein is a polyurea coating composition that may include an isocyanate component, an amine-functional resin containing an aspartic acid ester, a reactive silicone component having a molecular weight of at least 500, and TiO2. The coating composition may further include a reactive diluent. The coating composition may further include a non-reactive surface additive. The coating composition may have an equivalent ratio of the isocyanate component to the active hydrogen of the amine-functional resin ranging from 0.85:1 to 1.4:1. The amine-functional resin may include a primary amine and / or a secondary amine. The amine-functional resin may include an aromatic amine or an aliphatic amine. The isocyanate component may include a prepolymer formed from isophorone diisocyanate and a polyether polyol and / or a polyether amine. The coating composition may be a 2K coating in which the isocyanate component is separated from the amine-functional resin until ready for application to a substrate. The coating composition may be a gel coat.

[0011] The coating compositions described herein may include an amine-functional resin containing an aspartic acid ester. Suitable polyamines are numerous and can vary widely. Such polyamines may include those known in the art. Non-limiting examples of suitable polyamines include, but are not limited to, primary and secondary amines, and mixtures thereof, such as any of those listed herein. Amine-terminated polyureas may also be used. Amines containing tertiary amine functionality may be used, provided the amine further contains at least two primary and / or secondary amino groups. In some cases, the isocyanate-functional prepolymer may include a polyamine, and the ratio of equivalents of isocyanate groups (NCO) to equivalents of amine groups (NH) may be greater than 0.85. In some cases, the isocyanate-functional prepolymer may include a polyamine, and the ratio of equivalents of isocyanate groups (NCO) to equivalents of amine groups (NH) may be greater than 1.

[0012] The amines may include, for example, monoamines or polyamines having at least two functional groups, such as difunctional, trifunctional, or higher functional amines, and combinations thereof. The amines may be aromatic or aliphatic, such as cycloaliphatic, or mixtures thereof. Non-limiting examples of suitable monoamines include, but are not limited to, aliphatic polyamines such as ethylamine, the isomeric propylamines, butylamine, pentylamine, hexylamine, cyclohexylamine, and benzylamine.Suitable primary polyamines include ethylenediamine, 1,2-diaminopropane, 1,4-diaminobutane, 1,3-diaminopentane (DYTEK® EP, Invista), 1,6-diaminohexane, 2-methyl-1,5-pentanediamine (DYTEK® A, Invista), 2,5-diamino-2,5-dimethylhexane, 2,2,4- and / or 2,4,4-trimethyl-1,6-diaminohexane, 1,11-diaminoundecane, 1,12-diaminodecane, 1,3- and / or 1,4-cyclohexanediamine, 1-amino-3,3,5-trimethyl-5-aminomethyl-cyclohexane, 2,4- and / or 2,6-hexahydrotoluenediamine, 2,4′-diaminodicyclohexylmethane, 4,4′-diaminodicyclohexylmethane (PACM-20, Air) Suitable amines include, but are not limited to, 3,3'-dialkyl-4,4'-diaminodicyclohexylmethanes (such as 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane (DIMETHYL DICYKAN or LAROMIN® C260, BASF; ANCAMINE® 2049, Air Products) and 3,3'-diethyl-4,4'-diaminodicyclohexylmethane), 2,4- and / or 2,6-diaminotoluene, 3,5-diethyltoluene-2,4-diamine, 3,5-diethyltoluene-2,6-diamine, 3,5-dimethylthio-2,4-toluenediamine, 3,5-dimethylthio-2,4-toluenediamine, 2,4'- and / or 4,4'-diaminodiphenylmethane, dipropylenetriamine, bishexamethylenetriamine, or combinations thereof. Polyoxyalkyleneamines are also suitable. Polyoxyalkyleneamines contain two or more primary or secondary amino groups attached to a backbone, derived from, for example, propylene oxide, ethylene oxide, butylene oxide, or mixtures thereof.Examples of such amines include those available under the JEFFAMINE® name, such as JEFFAMINE® D-230, D-400, D-2000, HK-511, ED-600, ED-900, ED-2003, T-403, T-3000, T-5000, SD-231, SD-401, SD-2001, and ST-404 (from Huntsman Corporation). Such amines may have an approximate molecular weight ranging from 200 to 7500.

[0013] Secondary alicyclic diamines may also be used in the coating compositions described herein. Suitable alicyclic diamines include, but are not limited to, those commercially available under the DESMOPHEN® name, such as JEFFLINK® 754 (Huntsman Corporation), CLEARLINK® 1000 (Dorf-Ketal Chemicals, LLC), and asparagine ester functional amines, such as DESMOPHEN® NH1220, DESMOPHEN® NH1420, and DESMOPHEN® NH1520 (Covestro LLC, Pittsburgh, PA). Other suitable secondary amines include the reaction products of materials containing primary amine functionality, such as those described herein, with acrylonitrile. For example, the secondary amine may be the reaction product of 4,4'-diaminodicyclohexylmethane with acrylonitrile. Alternatively, the secondary amine can be the reaction product of isophorone diamine and acrylonitrile, such as POLYCLEAR™ 136 (available from BASF / Hanson Group LLC).

[0014] The coating compositions described herein may include an isocyanate component. As used herein, the term "isocyanate" includes unblocked isocyanate compounds capable of forming covalent bonds with reactive groups such as hydroxyl, thiol, or amine functional groups. Therefore, an isocyanate may refer to a "free isocyanate," as would be understood by one skilled in the art. The isocyanate may be monofunctional (containing one isocyanate functional group (NCO)). The isocyanate may be multifunctional (containing two or more isocyanate functional groups (NCO)). The isocyanate may be blocked. Any combination of isocyanates and / or isocyanate-functional prepolymers may be used in the coating compositions described herein.

[0015] Suitable isocyanates are numerous and can vary widely. Such isocyanates can include those known in the art. Non-limiting examples of suitable polyisocyanates can include monomeric and / or polymeric isocyanates. The isocyanates can be selected from monomers, prepolymers, oligomers, or blends thereof. The isocyanates can be C2-C 20 It may be linear, branched, cyclic, aromatic, aliphatic, or a combination thereof.

[0016] Examples of suitable polyisocyanates include isophorone diisocyanate (IPDI), which is 3,3,5-trimethyl-5-isocyanato-methyl-cyclohexyl isocyanate; hydrogenated materials such as cyclohexylene diisocyanate, 4,4'-methylenedicyclohexyl diisocyanate (H12MDI); mixed aralkyl diisocyanates, such as tetramethylxylyl diisocyanate, OCN-C(CH3)2-C6H4C(CH3)2-NCO; 1,4-tetramethylxylyl diisocyanate, OCN-C(CH3)2-C6H4C(CH3)2-NCO; Polymethylene isocyanates such as tramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate (HMDI), 1,7-heptamethylene diisocyanate, 2,2,4- and 2,4,4-trimethylenehexamethylene diisocyanate, 1,10-decamethylene diisocyanate, and 2-methyl-1,5-pentamethylene diisocyanate; and mixtures thereof.

[0017] Non-limiting examples of aromatic isocyanates for use in the coating compositions described herein include, but are not limited to, phenylene diisocyanate, toluene diisocyanate (TDI), xylene diisocyanate, 1,5-naphthalene diisocyanate, chlorophenylene 2,4-diisocyanate, bitolylene diisocyanate, dianisidine diisocyanate, tolidine diisocyanate, alkylated benzene diisocyanates, methylene interrupted aromatic diisocyanates, such as methylene diphenyl diisocyanate, 4,4'-isomer (MDI) (including alkylated analogs such as 3,3'-dimethyl-4,4'-diphenylmethane diisocyanate, polymeric methylene diphenyl diisocyanate), and mixtures thereof.

[0018] An isocyanate monomer may be used. Without wishing to be bound by theory, it is believed that the use of an isocyanate monomer (i.e., a monomer that does not contain residues from the preparation of the prepolymer) can reduce the viscosity of the polyurea composition, thereby improving its flowability and providing improved adhesion of the polyurea coating to previously applied coatings and / or uncoated substrates. In some cases, at least 1 wt. %, or at least 2 wt. %, or at least 4 wt. % of the isocyanate component may include at least one isocyanate monomer.

[0019] Isocyanates may include, but are not limited to, oligomeric isocyanates, such as dimers such as the uredione of 1,6-hexamethylene diisocyanate, trimers such as the biuret and isocyanurate of 1,6-hexane diisocyanate, and the isocyanurate of isophorone diisocyanate, allophonates, and polymeric oligomers. Modified isocyanates, including but not limited to carbodiimides and uretonimines, and mixtures thereof, may also be used. Suitable materials include those available under the DESMODUR® name (Covestro LLC, Pittsburgh, PA), including, but not limited to, DESMODUR® N3200, DESMODUR® N3300, DESMODUR® N3400, DESMODUR® XP2410, and DESMODUR® XP2580.

[0020] The isocyanate component may include an isocyanate-functional prepolymer formed from a reaction mixture containing an isocyanate and another material. Any isocyanate known in the art, such as any of those listed above, may be used to form the prepolymer. For example, the isocyanate component may include a prepolymer formed from isophorone diisocyanate and a polyether polyol and / or polyetheramine according to the process described in U.S. Pat. No. 8,691,929 (Example 1). As used herein, "isocyanate-functional prepolymer" refers to the reaction product of an isocyanate with other isocyanate-reactive groups, such as polyamines and / or polyols, and the isocyanate-functional prepolymer has at least one isocyanate functional group (NCO).

[0021] The coating composition can include an equivalent ratio of isocyanate component to active hydrogen of amine-functional resin of 0.85:1 to 1.4:1 (e.g., 0.95:1, 1.1:1, or 1.25:1). The composition can include 0.85:1, 0.88:1, 0.9:1, 0.92:1, 0.94:1, 0.95:1, 0.96:1, 0.98:1, 1:1, 1.01:1, 1.02:1, 1.04:1, 1.05:1, 1.06:1, 1.08:1, 1.1:1, 1.12:1, 1.14:1, 1.15:1, 1.16:1, 1.18:1, 1.19:1, 1.20:1, 1.21:1, 1.22:1, 1.23:1, 1.24:1, 1.25:1, 1.26:1, 1.27:1, 1.28:1, 1.29:1, 1.30:1, 1.31:1, 1.32:1, 1.33:1, 1.34:1, 1.35:1, 1.36:1, 1.37:1, 1.38:1, 1.39:1, 1.40:1, 1.42:1, 1.43:1, 1.44:1, 1.45:1, 1.46:1, 1.47:1, 1.48:1, 1.49:1, 1.50:1, 1.52:1, 1.53:1, 1.54:1, 1.5 The equivalent ratio of isocyanate component to active hydrogen of the amine-functional resin may be 1.18:1, 1.2:1, 1.22:1, 1.24:1, 1.25:1, 1.26:1, 1.28:1, 1.3:1, 1.32:1, 1.34:1, 1.35:1, 1.36:1, 1.38:1, or 1.4:1.

[0022] The coating compositions described herein may contain a reactive silicone component in an amount of up to 7% by weight (e.g., up to 4%, up to 5%, or up to 6% by weight). The composition may contain 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, or 7% of the reactive silicone component. All percentages of the reactive silicone component are expressed in weight percent based on the total solids weight of the composition. The reactive silicone component may include an amine-functional silicone, a hydroxyl-functional silicone, or a combination thereof. The reactive silicone component may include an amino-functional methylphenyl silicone resin. The reactive silicone component may include a hydroxyalkyl polydimethylsiloxane. The reactive silicone component may have a molecular weight of at least 500 atomic mass units (amu) (e.g., at least 1000 amu, at least 2500 amu, at least 4300 amu). The reactive silicone component may have a molecular weight of at least 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2250, 2500, 2750, 3000, 3250, 3500, 3750, 4000, 4250, 4500, 4750, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10,000, 10,500, 11,000, 11,500, or 12,000 amu. The reactive silicone component may contain multiple functional groups. For example, the reactive silicone component may contain at least two functional groups, three functional groups, or four functional groups. Non-limiting examples include Silmer® OHT Di-10 and Silmer® HS2000 (Siltech Corporation), and Tego® Protect 5000N (Evonik Industries). The reactive silicone component may have at least one reactive functional group that is reactive with isocyanate, amine, and / or hydroxy groups.The reactive silicone component can have at least one reactive functional group that is reactive toward isocyanate, amine, and / or hydroxy groups and has a functional group equivalent weight greater than 500 amu. The reactive silicone component can have at least two reactive moieties (e.g., at least two, at least three, or at least four reactive moieties).

[0023] In some cases, the coating composition described herein can be used in a molding process. Figures 1 and 2 show an exemplary molding process. The mold can be an open mold in which the coating and any subsequent layers are applied to the top of the mold. The mold can be a closed mold in which the coating and any subsequent layers are poured, sprayed, or otherwise applied to a multi-part mold. A release agent, which can be made from silicone or wax, can be applied to the mold according to its technical data sheet. The coating composition and subsequent layers can then be applied to the treated mold.

[0024] Unlike typical coating processes, the finished side of a molded part is at the coating / mold interface and is exposed when the product is released from the mold. The reactive silicone additives with higher molecular weights used in the coating compositions described herein can allow the silicone additive to react and remain at the mold / coating interface rather than migrating to the coating / air interface. This migration can be desirable in typical coating processes where the air / coating interface is the finished side. Migration in the molding processes described herein can place the silicone on a surface that will be further processed by the addition of a subsequent structural or composite layer. Migration of silicone in a molded part may be undesirable. In some cases, subsequent structural or composite layers added to the coating compositions herein may have improved adhesion because the silicone additive remains at the mold / coating interface. The finished molded part may have better stain resistance because the silicone additive does not migrate to the air interface but remains at the mold / coating interface, becoming the finished side of the product when the article is released from the mold. In some cases, the silicone additive can aid in the release of the finished molded part from the mold.

[0025] The coating compositions described herein may include TiO. The TiO may be present in an amount of at least 1% by weight (e.g., at least 8%, at least 15%, at least 25% by weight). The composition may include 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30% TiO. All percentages of TiO are expressed in weight percent based on the total solids weight of the composition.

[0026] The coating compositions described herein may further comprise a reactive diluent. The reactive diluent may contain one to four functional groups, including amine, epoxy, carbonate, acrylate, and / or silane functional groups. The reactive diluent may include 2-ethylhexyl glycidyl ether, glycidyl ester of neodecanoic acid, 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate, cardanol-based diluent, epoxy bio-based oil reactive diluent, propylene carbonate, 1,6-hexanediol diacrylate, butyl acrylate, ethylhexyl acrylate, methacrylate, methyl methacrylate, vinyltrimethoxysilane, dimethylsiloxane-vinylmethylsiloxane-(propylene oxide-ethylene oxide) block copolymer, tetraethyl orthosilicate, or a combination thereof. The reactive diluent may be added to the amine-functional resin or the isocyanate component.

[0027] Reactive diluents can modify the viscosity of coating components to provide low pressure differentials for intermittent application (start / stop) processes that apply 2K coating compositions with substantially equal mixing, including automated or robotic operations with trigger on / off spray. For example, reactive diluents can be added to amine-functional resins to modify viscosity and provide similar spray conditions for the amine and isocyanate portions of polyurea coatings. The isocyanate component can be used alone or diluted with a reactive diluent, as needed, to achieve optimal spray pressure. In some cases, the pressure differential can be less than 400 psi (e.g., less than 350 psi, less than 300 psi, or less than 250 psi).

[0028] The coating composition may further include a catalyst compound, including a metal compound, a mixed metal compound, an organometallic compound, and / or an organic compound. The metal compound, the mixed metal compound, and / or the organometallic compound may include tin, zinc, bismuth, zirconium, manganese, titanium, cobalt, iron, or lead. The organic compound may include bicycloguanidine, imidazole, an acid, an aliphatic amine, a cyclic amine, a phosphonium salt, a phenolic acid, a phenolic salt, a sulfonic acid, a sulfonic salt, a tertiary amine, or a quaternary ammonium salt. In some examples, the catalyst compound may comprise less than 1 wt.% of the composition (e.g., up to 0.8 wt.%, up to 0.5 wt.%, or up to 0.2 wt.%) based on the total solids weight of the composition. The composition may include 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or up to 1% of the catalyst compound. All percentages of the catalyst compound are expressed in weight percent based on the total solids weight of the composition. Optionally, the organometallic compound can include dibutyltin dilaurate (DBDL) and / or dibutyltin diacetate (DBDA). In some examples, the composition can be free of organometallic or organotin compounds. In some examples, the organocatalyst can include a tertiary amine, such as 1,8-diazabicyclo-5,4,0-undecene-7 (DBU), and / or an acid, such as acetic acid.

[0029] The coating composition may further comprise a non-reactive surface additive in an amount of up to 3% by weight (e.g., up to 1.5% by weight or up to 2% by weight). The composition may comprise 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, or 3% of the non-reactive surface additive. All percentages of the non-reactive surface additive are expressed in weight percent based on the total solids weight of the composition. The non-reactive surface additive may include an antifoaming agent, a wetting agent, a dispersant, or a combination thereof. In some cases, the coating composition may not comprise a non-reactive surface additive.

[0030] The coating composition may further include polysiloxanes, UV absorbers, hindered amine light stabilizers (HALS), inorganic fillers, organic fillers, reinforcing agents, pigments, flame retardants, biocides, antimicrobial agents, or combinations thereof. The coating composition may include silicate minerals, metal oxides, metal salts, clay, natural and synthetic fibrous minerals, carbon black, melamine, rosin, cyclopentadienyl resins, or combinations thereof. For example, the coating composition may include calcium carbonate, silica, fumed silica, mica, glass, glass beads, aluminum trihydrate, gypsum, wollastonite, phosphorus, calcium sulfate, magnesium hydroxide, organoclay derivatives, or combinations thereof.

[0031] The coating compositions described herein may optionally include a cure inhibitor and a solvent. The coating compositions described herein may be 1K compositions. Blocked isocyanates and / or blocked amines may be used to create 1K compositions. The cure inhibitor and solvent may provide a longer working time by slowing the reaction of the polyurea coating composition. In some cases, the composition may have a pot life of more than 15 minutes (e.g., more than 20 minutes, more than 30 minutes, or more than 40 minutes). As used herein, pot life is the time from when the components of the composition are combined to when the mixed composition no longer functions. The composition may have a pot life of more than 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 minutes.

[0032] The cure inhibitor may be present in an amount of at least 5% by weight (e.g., at least 5%, at least 10%, or at least 25%). The composition may contain at least 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, or 75% cure inhibitor. All percentages of cure inhibitor are expressed in weight percent based on the total solids weight of the composition. The cure inhibitor may include a ketone, a pyrazole, a polyol, or a combination thereof. For example, the cure inhibitor may include acetone, acetylacetone, 3,5-dimethylpyrazole, or a combination thereof. The cure inhibitor may include tetra(2-hydroxypropyl)ethylenediamine, polytetramethylene ether glycol, or a combination thereof.

[0033] The solvent may be present in an amount of up to 20% by weight (e.g., up to 5%, up to 13%, or up to 17%). The composition may contain up to 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20% solvent. All solvent percentages are expressed as weight percent based on the total solids weight of the composition. The solvent may include an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof. For example, the solvent may include naphtha, butyl acetate, xylene, or a combination thereof.

[0034] Substrates can include the coating compositions described herein. Articles can include substrates containing the coating compositions described herein. Non-limiting examples of articles include consumer products such as bathtubs, swimming pools, or spas, and industrial and commercial products such as turbine blades, prefabricated parts, boats, and other products used in the marine, transportation, wind energy, and construction sectors. Other non-limiting examples of articles include parts and accessories for the transportation and automotive sectors.

[0035] Also disclosed herein are methods for coating a substrate. Examples of suitable substrates can include metal, plastic, concrete, cement, asphalt, wood, geotextile, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite. In some examples, metal substrates can include iron, steel, steel alloy, galvanized metal, and / or aluminum. In some examples, plastic substrates can include polyurethane, epoxy, and / or polyurea. In some examples, synthetic fibers can include acetate, acrylic, nylon, aramid, polyolefin, ceramic, and / or polyester fibers. The method of coating a substrate can include applying a coating composition described herein to at least a portion of the substrate.

[0036] Optionally, the method may further include adding a mold release composition to the substrate before applying the coating composition. Optionally, the method may further include adding a sealant to the substrate before applying the mold release composition. Optionally, the method may further include applying a second layer to the first layer formed by the coating composition, the second layer having a different composition from the coating composition of the first layer. For example, the second layer may include plastic, wood, concrete, cement, geotextile, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite. In some examples, the plastic substrate may include polyurethane, epoxy, and / or polyurea. In some examples, the synthetic fiber may include acetate, acrylic, nylon, aramid, polyolefin, ceramic, and / or polyester fiber.

[0037] The method for applying the coating composition may include spraying. The coating composition may be applied with a spray gun by air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, and / or low-pressure static mix spray, or other means known to those skilled in the art. In some cases, a static mixer may be used during spraying. A static mixer may reduce application pressure and improve mixing, which may reduce operating costs and improve product quality.

[0038] The spray gun used to apply the coating composition can have a reciprocator speed of 300 to 1000 mm / sec (e.g., 350 mm / sec, 500 mm / sec, 700 mm / sec). The reciprocator speed can be 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600, 625, 650, 675, 700, 725, 750, 775, 800, 825, 850, 875, 900, 925, 950, 975, or 1000 mm / sec. The coating composition can be applied at a speed of 4 to 20 lbs / min (e.g., 5 lbs / min, 10 lbs / min, 15 lbs / min). The application speed may be 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 lbs / min. The coating composition may be applied at a pressure greater than 1500 psi (e.g., 2000 psi, 3000 psi, 3500 psi). The application pressure may be greater than 1500, 1750, 2000, 2250, 2500, 2750, 3000, 3500, or 4000 psi. For 2K applications, the pressure differential may be less than 400 psi (e.g., less than 350 psi, less than 300 psi, or less than 250 psi). The pressure differential may be less than 400, 350, 325, 300, 275, 250, 225, 200, 175, 150, 125, 100, 75, 50, or 25 psi. The coating composition can be applied at a temperature greater than 120°F (e.g., greater than 120°F, greater than 135°F, greater than 150°F). The application temperature may be greater than 120°F, 125°F, 130°F, 135°F, 140°F, 145°F, 150°F, 155°F, 160°F, 165°F, 170°F, 175°F, or 180°F. The coating composition may be applied at a thickness of up to 500 mils (e.g., up to 20 mils, up to 85 mils, up to 140 mils). The coating composition can be applied at a thickness of 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, or 500 mils.

[0039] The coating compositions described herein may have a tack-free time of less than 250 seconds (e.g., 200 seconds, 75 seconds, or 25 seconds) according to ASTM D1640-03. The tack-free time may be less than 250, 225, 200, 175, 150, 125, 100, 75, 50, 25, 20, 15, 10, or 5 seconds according to ASTM D1640-03. The coating compositions may have a dry-through time of less than 1100 seconds (e.g., 500 seconds, 200 seconds, or 100 seconds) according to ASTM D1640-03. The dry-through time may be less than 1100, 1075, 1050, 1025, 1000, 975, 950, 925, 900, 875, 850, 825, 800, 775, 750, 725, 700, 675, 650, 625, 600, 575, 550, 525, 500, 475, 450, 425, 400, 375, 350, 325, 300, 275, 250, 225, 200, 175, 150, 125, 100, 75, or 50 seconds per ASTM D1640-03.

[0040] The coating compositions described herein may have a Shore D hardness value greater than 65 (e.g., greater than 65, greater than 70, or greater than 75) according to ASTM D2240-15(2021). The Shore D hardness value may be greater than 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, or greater than 80 according to ASTM D2240-15(2021). The Shore D hardness value may be determined at 7 days according to ASTM D2240-15(2021). The coating compositions may have an alicyclic ring equivalent weight greater than 127 meq / 100g (e.g., greater than 136 meq / 100g, greater than 172 meq / 100g, or greater than 254 meq / 100g). The alicyclic ring equivalent weight may be greater than 127, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, or 370 meq / 100g. In some cases, the coating composition may have a Shore D hardness value of greater than 65 at 7 days according to ASTM D2240-15(2021) and an alicyclic ring equivalent weight of greater than 127 meq / 100g. In some cases, the coating composition may have a Shore D hardness value of greater than 65 at 7 days according to ASTM D2240-15(2021) and an alicyclic ring equivalent weight of greater than 172 meq / 100g.

[0041] The coating composition may have a contrast ratio (%CR) value at 10 mils of at least 50 (e.g., at least 72, at least 83, or at least 94) according to ASTM D2805. The %CR value at 10 mils may be at least 50, 55, 60, 65, 70, 75, 80, 85, 90, or 95. The coating composition may have a stain resistance value of less than 60 (e.g., 60, 50, or 45) according to ANSI Z124.1.2-2005 5.2. The stain resistance value may be less than 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, or 40 according to ANSI Z124.1.2-2005 5.2.

[0042] The coating composition may have an elongation of 4 to 100% (e.g., 10%, 30%, or 70%) according to ASTM D638-14. The elongation may be 4%, 6%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100%.

[0043] The coating composition may be rust-resistant. The coating composition may be chlorine-resistant. Rust and chlorine resistance tests can be performed by placing a 1-inch diameter chemical spot of rust or chlorine solution on the sample and covering it with a watch glass for 24 hours at ambient conditions (75 + / - 2°F) according to ASTM D1308-20 Test Method 3.1.1 Spot Test, Coating, Procedure 7.2. The sample can be considered passing if no deterioration, softening, cracking, or color change occurs. The rust solution can be prepared by removing the head from a rusted nail using tin snips or other suitable cutting tool and trimming the other end as needed to create a segment 2.54 cm long. A piece of the rusted nail can be placed on the test panel, and a pipette can be used to transfer 1 mL of deionized water directly to the piece of nail that can be covered with a watch glass for observation.

[0044] The coating composition may have a fire test value of less than 30 seconds, excluding the edges, in accordance with ANSI Z124.1.2-2005 5.6. The center of the coating composition specimen may not burn after two 30-second burn intervals. The center of the coating composition specimen may self-extinguish if it burns after two 30-second burn intervals.

[0045] Also disclosed herein is a method for repairing an article. The article may include a first coating on at least a portion of the article. For example, the article may include a polyurea composition, a polyaspartic composition, a polyurethane composition, or a combination thereof as the first coating. The first coating may be on the surface of the article. The article may have voids or otherwise damaged areas in the first coating. A method for repairing an article including a first coating may include applying a coating composition described herein to at least a portion of the article.

[0046] Optionally, the method for repairing an article may further include preparing at least a portion of the article prior to applying the coating composition. In some cases, preparing at least a portion of the article may include sanding or scrubbing at least a portion of the article.

[0047] In some cases, preparing at least a portion of the article can include adding a filler material and / or base layer comprising the second coating composition to at least a portion of the article. The filler material can include plastic, wood, concrete, cement, geotextile, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite. In some examples, the plastic substrate can include polyurethane, epoxy, and / or polyurea. In some examples, the synthetic fiber can include acetate, acrylic, nylon, aramid, polyolefin, ceramic, and / or polyester fiber.

[0048] Methods for applying the coating composition to repair an article can include extrusion, spraying, troweling, brushing, and / or rolling. The coating composition can be applied with a spray gun by air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, and / or low-pressure static mix spray, or other means known to those skilled in the art. In some cases, a static mixer can be used during spraying, extrusion, spraying, troweling, brushing, and / or rolling.

[0049] The method for applying the coating composition for repairing an article can further include smoothing and / or polishing the coating composition after the coating composition has gelled on the article. The coating composition for repairing an article described herein can have a pot life of more than 15 minutes (e.g., 15 minutes, 20 minutes, or 25 minutes). The pot life can be more than 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40 minutes.

[0050] The method for applying a coating composition to repair an article may further include contacting the coating composition with a second solvent after the coating composition has gelled on the article. The second solvent may include an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof. For example, the solvent may include naphtha, butyl acetate, xylene, or a combination thereof. The second solvent may be the same as or different from the first solvent in the composition. The second solvent may blend a portion of the gelled coating composition with a portion of the article to reduce the visual contrast between the gelled coating composition and the article.

[0051] The substrate may include a vehicle, a structure, a marine component, an automotive body part, an aerospace component, a wind turbine component, a roofing component, and a consumer product. The article may include a substrate comprising the coating composition described herein.

[0052] As used herein, "consumer goods" refers to bathtubs, spas, swimming pools, vanities, sinks, or other items exposed to corrosive or harsh environmental conditions. "Vehicle" refers in its broadest sense to all types of vehicles, including, but not limited to, cars, trucks, buses, tractors, harvesters, heavy duty equipment, vans, golf carts, motorcycles, bicycles, rail cars, airplanes, helicopters, and boats of all sizes.

[0053] As used herein, unless expressly specified otherwise, all numbers, such as those expressing values, ranges, amounts, or percentages, may be read as if preceded by the word "about," even if the term does not explicitly appear. Any numerical ranges described herein are intended to include all subranges subsumed therein. When ranges are given, any endpoints of those ranges and / or any numerical values ​​within those ranges can be combined to define the scope of the present disclosure. While the numerical ranges and parameters setting forth the broad scope of the present disclosure are approximations, the numerical values ​​set forth in the specific examples are reported as precisely as possible. However, any numerical values ​​inherently contain certain errors necessarily resulting from the standard deviations found in their respective testing measurements. When ranges are given, any endpoints of those ranges and / or any numerical values ​​within those ranges can be combined to define the scope of the present disclosure. "Comprise" and similar terms also mean "including, but not limited to." As used in this specification and claims, the words "comprising" and forms of the word "comprising" do not limit the claimed disclosure to exclude any modifications or additions.

[0054] As used herein, the terms "on," "applied on," and "applied over" mean formed on or provided on a surface, but not necessarily in contact with the surface. Each of the above-described and below features and examples, and combinations thereof, may be said to be encompassed by the present disclosure.

[0055] As used herein, the meanings of "a," "an," and "the" include singular and plural references unless the context clearly dictates otherwise.

[0056] As used herein, the terms "disclosure," "disclosure," "this disclosure," and "this disclosure" are intended to refer broadly to all of the subject matter of this patent application and the claims that follow. Statements containing these terms should be understood not to limit the subject matter described herein or to limit the meaning or scope of the claims that follow. The terms "comprising," "having," "including," and "containing" are intended to be construed as open-ended terms (i.e., meaning "including, but not limited to") unless otherwise noted.

[0057] Although various embodiments of the present invention have been described in terms of "comprising," embodiments that consist essentially of or consist of are also within the scope of the present invention. In this context, "consisting essentially of" means that any additional components do not materially affect the viscosity or other properties of the composition.

[0058] The following examples are intended to further illustrate the present disclosure.It is understood that the disclosure described herein is not necessarily limited to the examples described in this section.Components that are described elsewhere herein as suitable alternative materials for use in the present disclosure, but are not demonstrated in the following examples, are expected to provide results comparable to those demonstrated. [Example]

[0059] Examples of the coating compositions described herein were prepared and evaluated for performance.

[0060] Example 1 Desmodur N3300™ A and propylene carbonate were transferred to a container equipped with a Cowles blade. The mixture was mixed in the container for 10 minutes.

[0061] Example 2 B-pack (amine) samples were prepared according to the compositions in Table 1. B-pack (amine) samples were prepared by first combining 50% of the amine / hydroxy-functional compound with all additives except for the pigment, if applicable. Under agitation, the pigment, if applicable, was added to the resin blend and milled in a horizontal mill to a Hegman >5, preferably >7.5 (7.5 being a finer particle size than 5). Upon completion of the milling step, any remaining materials listed in the composition table, if applicable, were added under low shear and mixed with a Cowles blade for 10 minutes to complete the B-pack formulation. The samples were shaken for 10 minutes before every application to ensure a homogeneous sample. [Table 1] [Table 1]

[0062] The "pigment / additive blend" contained one or more weathering additives in amounts of 0.3-2.5 wt%, 5-30 wt% TiO2, 1-8 wt% one or more pigments, 0.04-3 wt% one or more surface-active additives, and up to 2 wt% one or more alkoxysilane additives, based on the total weight of Part B. The total amount of pigments excluded TiO2 for film properties and rheology control. Quadrol PM is available from BASF. HXA CE425 is available from BASF / Hanson Group LLC.

[0063] Example 3 Samples were prepared according to the compositions in Table 2. B Pack (amine) samples were prepared by combining an amine / hydroxy functional compound with a reactive stain resistant additive. The molecular weight and equivalent weight of the reactive stain resistant additive are shown in Table 3. [Table 2] [Table 2] [Table 3]

[0064] SILMER® products are available from Siltech Corporation, Toronto, Ontario, Canada. According to Siltech, Silmer OHT A0 is a hydroxyalkyl-modified silicone with difunctional hydroxyls attached to the silicone backbone; Silmer OHT Di-10, Silmer OHT Di-50, and Silmer OHT Di-100 are tetrafunctional hydroxyl silicones; Silmer OH Di-10 is a linear difunctional hydroxyl-terminated silicone prepolymer; and Silmer NH C50 is a trifunctional silicone with amine groups.

[0065] Example 4 The Part A and Part B compositions from Tables 1 and 2 were sprayed through multiple component spray systems, such as Graco E-10 HP and HXP2 machines equipped with mixing guns, such as the Graco® AP Fusion, MP Fusion, and AP Proconnect guns. The systems were set to the spray parameters listed in Table 4. Subsequent layers were applied to enable testing. Subsequent layers can be any type of coating that can provide structural support to the gel coat for different testing, such as DuraBull™ headliner products available from PPG. The molded parts were stripped from the mold after they were fully cured. [Table 4]

[0066] Exemplary Embodiments of Preferred Compositions and Methods

[0067] As used hereinafter, any reference to a composition, article, or method shall be understood as a reference to each of those compositions, articles, or methods in isolation (e.g., "Exemplary Embodiments 1-4 shall be understood as Exemplary Embodiments 1, 2, 3, or 4").

[0068] Exemplary embodiment 1 is a coating composition that includes an isocyanate component, an amine-functional resin that includes an aspartic acid ester, a reactive silicone component having a molecular weight of at least 500, and TiO in an amount of at least 5 wt %.

[0069] Exemplary Embodiment 2 is a coating composition according to any preceding or subsequent exemplary embodiment, further comprising a reactive diluent.

[0070] Exemplary embodiment 3 is a coating composition according to any preceding or subsequent exemplary embodiment, wherein the reactive silicone component is up to 7% by weight.

[0071] Exemplary Embodiment 4 is a coating composition according to any preceding or subsequent exemplary embodiment, further comprising up to a total of 3 wt. % of a non-reactive surface additive.

[0072] Exemplary Embodiment 5 is a coating composition according to any preceding or subsequent exemplary embodiment, further comprising a polysiloxane, a UV absorber, a hindered amine light stabilizer (HALS), an inorganic filler, an organic filler, a reinforcing agent, a pigment, a flame retardant, a biocide, an antimicrobial agent, or a combination thereof.

[0073] Exemplary Embodiment 6 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the equivalents ratio of isocyanate component to active hydrogen of amine-functional resin is in the range of 0.85:1 to 1.4:1.

[0074] Exemplary Embodiment 7 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the amine-functional resin further comprises a primary amine and / or a secondary amine.

[0075] Exemplary Embodiment 8 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the amine-functional resin further comprises an aromatic amine or an aliphatic amine.

[0076] Exemplary Embodiment 9 is a coating composition as described in any preceding or subsequent exemplary embodiment, wherein the isocyanate component includes a prepolymer formed from isophorone diisocyanate and a polyether polyol and / or a polyether amine.

[0077] Exemplary embodiment 10 is a coating composition according to any preceding or subsequent exemplary embodiment, further comprising a catalyst comprising zinc, manganese, zirconium, titanium, cobalt, iron, lead, bismuth, or tin.

[0078] Exemplary embodiment 11 is a substrate comprising a coating composition, including the coating composition described in any preceding exemplary embodiment.

[0079] Exemplary embodiment 12 is an article comprising a substrate according to any preceding exemplary embodiment.

[0080] Exemplary embodiment 13 is an article comprising a bathtub, a shower enclosure, a swimming pool, a spa, a boat, a turbine blade, a precast concrete component, or a prefabricated structural component.

[0081] Exemplary embodiment 14 is a method comprising applying to at least a portion of a substrate the coating composition of any preceding or subsequent exemplary embodiment.

[0082] Exemplary Embodiment 15 is the method of any preceding or subsequent exemplary embodiment, further comprising adding a mold release composition to the substrate prior to applying the coating composition.

[0083] Exemplary Embodiment 16 is the method of any preceding or subsequent exemplary embodiment, further comprising applying a second layer to the first layer formed by the coating composition, the second layer having a different composition than the coating composition of the first layer.

[0084] Exemplary Embodiment 17 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition is applied with a spray gun by air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low-pressure static mix spray.

[0085] Exemplary Embodiment 18 is the method of any preceding or subsequent exemplary embodiment, wherein the spray gun has a reciprocator speed of between 300 and 1000 mm / sec.

[0086] Exemplary Embodiment 19 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition is applied at a rate of 4 to 20 lbs / min.

[0087] Exemplary Embodiment 20 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a tack-free time of less than 250 seconds according to ASTM D1640-03.

[0088] Exemplary Embodiment 21 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a dry-through time of less than 1100 seconds according to ASTM D1640-03.

[0089] Exemplary embodiment 22 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a Shore D hardness value according to ASTM D2240-15(2021) greater than 65, and the coating composition has an alicyclic ring equivalent weight greater than 127 meq / 100 g.

[0090] Exemplary Embodiment 23 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a contrast ratio (%CR) value of at least 50 at 10 mils according to ASTM D2805.

[0091] Exemplary Embodiment 24 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has an elongation according to ASTM D638-14 of 4 to 100%.

[0092] Exemplary Embodiment 25 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a fire test value, excluding edges, of less than 30 seconds per ANSI Z124.1.2-2005 5.6.

[0093] Exemplary Embodiment 26 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a stain resistance value of less than 60 according to ANSI Z124.1.2-2005 5.2.

[0094] Exemplary Embodiment 27 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition is rust-inhibiting.

[0095] Exemplary Embodiment 28 is the method of any preceding or subsequent exemplary embodiment, in which the coating composition is chlorine resistant.

[0096] Exemplary embodiment 29 is the method of any preceding exemplary embodiment, wherein the second layer comprises plastic, wood, geotextile, concrete, cement, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite.

[0097] Exemplary embodiment 30 is a coating composition that includes an isocyanate component, an amine-functional resin including an asparagine amine, a reactive silicone component having a molecular weight of at least 500, TiO, a cure inhibitor in an amount of at least 5 wt%, and a solvent in an amount of up to 20 wt%.

[0098] Exemplary embodiment 31 is a coating composition according to any preceding or subsequent exemplary embodiment, further comprising a reactive diluent.

[0099] Exemplary Embodiment 32 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the cure inhibitor comprises a ketone, a pyrazole, a polyol, or a combination thereof.

[0100] Exemplary Embodiment 33 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the cure inhibitor comprises acetone, acetylacetone, 3,5-dimethylpyrazole, or a combination thereof.

[0101] Exemplary Embodiment 34 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the cure inhibitor comprises tetra(2-hydroxypropyl)ethylenediamine, polytetramethylene ether glycol, or a combination thereof.

[0102] Exemplary embodiment 35 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

[0103] Exemplary embodiment 36 is the coating composition of any preceding or subsequent exemplary embodiment, wherein the solvent comprises naphtha, xylene, butyl acetate, or a combination thereof.

[0104] Exemplary embodiment 37 is a coating composition according to any preceding or subsequent exemplary embodiment, wherein the composition has a pot life of greater than 15 minutes.

[0105] Exemplary embodiment 38 is the coating composition of any preceding exemplary embodiment, wherein the composition has a pot life of greater than 30 minutes.

[0106] Exemplary embodiment 39 is a method for repairing an article comprising a first coating, the method comprising applying a coating composition described in any preceding exemplary embodiment to at least a portion of the article.

[0107] Exemplary embodiment 40 is the method of any preceding or subsequent exemplary embodiment, wherein the first coating comprises a polyurea composition, a polyaspartic composition, a polyurethane composition, or a combination thereof.

[0108] Exemplary Embodiment 41 is the method of any preceding or subsequent exemplary embodiment, further comprising preparing at least a portion of the article prior to applying the coating composition.

[0109] Exemplary embodiment 42 is the method of any preceding or subsequent exemplary embodiment, wherein preparing at least a portion of the article includes sanding or scrubbing at least a portion of the article.

[0110] Exemplary Embodiment 43 is the method of any preceding or subsequent exemplary embodiment, wherein preparing at least a portion of the article comprises adding to at least a portion of the article a filler material and / or a base layer comprising the second coating composition.

[0111] Exemplary embodiment 44 is a method according to any preceding or subsequent exemplary embodiment, wherein applying the coating composition includes extruding, spraying, troweling, brushing, and / or rolling.

[0112] Exemplary embodiment 45 is a method according to any preceding or subsequent exemplary embodiment, wherein the spraying comprises air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low pressure static mix spray.

[0113] Exemplary embodiment 46 is the method of any preceding or subsequent exemplary embodiment, wherein applying further includes using a static mixer.

[0114] Exemplary Embodiment 47 is the method of any preceding or subsequent exemplary embodiment, further comprising smoothing and / or polishing the coating composition after it gels on the article.

[0115] Exemplary embodiment 48 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition has a pot life of greater than 15 minutes.

[0116] Exemplary embodiment 49 is the method of any preceding or subsequent exemplary embodiment, wherein the coating composition is applied to voids or damaged areas of a first coating on an article.

[0117] Exemplary embodiment 50 is a method according to any preceding or subsequent exemplary embodiment, wherein the article comprises plastic, wood, concrete, cement, geotextile, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite.

[0118] Exemplary Embodiment 51 is the method of any preceding or subsequent exemplary embodiment, further comprising contacting the coating composition with a second solvent after the coating composition has gelled on the article.

[0119] Exemplary embodiment 52 is the method of any preceding or subsequent exemplary embodiment, wherein the second solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

[0120] Exemplary Embodiment 53 is the method of any preceding exemplary embodiment, wherein the second solvent blends a portion of the gelled coating composition with a portion of the article to reduce visual contrast between the gelled coating composition and the article.

[0121] Exemplary embodiment 54 is a kit including a first part including an isocyanate component and a second part including an amine-functional resin including an asparagine amine, a reactive silicone component having a molecular weight of at least 500, TiO, and a cure inhibitor.

[0122] Exemplary embodiment 55 is a kit according to any preceding exemplary embodiment, further comprising a solvent.

[0123] Exemplary embodiment 56 is a kit including a first part including an isocyanate component, a reactive silicone component having a molecular weight of at least 500, TiO, and a cure inhibitor, and a second part including an amine-functional resin including an asparagine amine.

[0124] Exemplary embodiment 57 is the kit of any preceding exemplary embodiment, further comprising a solvent.

[0125] While various examples of the present disclosure have been described to achieve various objectives of the disclosure, it should be recognized that these examples are merely illustrative of the principles of the disclosure, and many modifications and adaptations thereof will be readily apparent to those skilled in the art without departing from the spirit and scope of the disclosure as defined in the following claims. The following is further disclosed in relation to the present invention. [1] 1. A coating composition comprising: an isocyanate component; an amine-functional resin comprising an aspartic acid ester; a reactive silicone component having a molecular weight of at least 500; TiO in an amount of at least 5% by weight 2 A coating composition comprising: [2] The coating composition according to [1], further comprising a reactive diluent. [3] The coating composition according to [1] or [2], wherein the reactive silicone component is at most 7% by weight. [4] The coating composition according to any one of [1] to [3], further comprising a total of up to 3 wt% of non-reactive surface additives. [5] The coating composition according to any one of [1] to [4], further comprising a polysiloxane, a UV absorber, a hindered amine light stabilizer (HALS), an inorganic filler, an organic filler, a reinforcing agent, a pigment, a flame retardant, a biocide, an antimicrobial agent, or a combination thereof. [6] The coating composition according to any one of [1] to [5], wherein the equivalent ratio of the isocyanate component to the active hydrogen of the amine-functional resin is in the range of 0.85:1 to 1.4:1. [7] The coating composition according to any one of [1] to [6], wherein the amine-functional resin further comprises a primary amine and / or a secondary amine. [8] The coating composition according to any one of [1] to [7], wherein the amine-functional resin further comprises an aromatic amine or an aliphatic amine. [9] The coating composition according to any one of [1] to [8], wherein the isocyanate component comprises a prepolymer formed from isophorone diisocyanate and a polyether polyol and / or a polyether amine.

[10] The coating composition according to any one of [1] to [9], further comprising a catalyst containing zinc, manganese, zirconium, titanium, cobalt, iron, lead, bismuth, or tin.

[11] A substrate comprising the coating composition according to any one of [1] to

[10] .

[12]

[11] An article comprising the substrate according to

[11] .

[13] 12. The article of claim 11, comprising a bathtub, a shower enclosure, a swimming pool, a spa, a boat, a turbine blade, a precast concrete component, or a prefabricated structural component.

[14] A method comprising applying the coating composition according to any one of [1] to

[10] to at least a portion of a substrate.

[15] 15. The method of claim 14, further comprising adding a mold release composition to the substrate before applying the coating composition.

[16] The method of

[14] or

[15] , further comprising applying a second layer to the first layer formed by the coating composition, wherein the second layer has a different composition from the coating composition of the first layer.

[17] The method according to any one of

[14] to

[16] , wherein the coating composition is applied with a spray gun by air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low-pressure static mix spray.

[18] The method according to

[17] , wherein the spray gun has a reciprocator speed of 300 to 1000 mm / sec.

[19] The method according to

[17] or

[18] , wherein the coating composition is applied at a rate of 4 to 20 lbs / min.

[20] The method according to any one of

[14] to

[19] , wherein the coating composition has a tack-free time of less than 250 seconds according to ASTM D1640-03.

[21] The method according to any one of

[14] to

[20] , wherein the coating composition has a dry-through time of less than 1100 seconds according to ASTM D1640-03.

[22] The method according to any one of

[14] to

[21] , wherein the coating composition has a Shore D hardness value according to ASTM D2240-15(2021) of greater than 65, and the coating composition has an alicyclic ring equivalent weight of greater than 127 meq / 100 g.

[23] The method according to any one of

[14] to

[22] , wherein the coating composition has a contrast ratio (%CR) value of at least 50 at 10 mils according to ASTM D2805.

[24] The method according to any one of

[14] to

[23] , wherein the coating composition has an elongation of 4 to 100% according to ASTM D638-14.

[25] The method according to any one of

[14] to

[24] , wherein the coating composition has a fire test value of less than 30 seconds, excluding the edges, in accordance with ANSI Z124.1.2-2005 5.6.

[26] The method according to any one of

[14] to

[25] , wherein the coating composition has a stain resistance value of less than 60 according to ANSI Z124.1.2-2005 5.2.

[27] The method according to any one of

[14] to

[26] , wherein the coating composition is rust-proof.

[28] The method according to any one of

[14] to

[27] , wherein the coating composition is chlorine-resistant.

[29] The method of any one of

[14] to

[28] , wherein the second layer comprises plastic, wood, geotextile, concrete, cement, glass fiber composite, carbon fiber composite, and / or synthetic fiber composite.

[30] 1. A coating composition comprising: an isocyanate component; an amine-functional resin comprising an asparagine amine; a reactive silicone component having a molecular weight of at least 500; TiO 2 and, a cure inhibitor in an amount of at least 5 wt. %; and a solvent in an amount of up to 20% by weight.

[31]

[30] The coating composition according to

[30] , further comprising a reactive diluent.

[32]

[30] or

[31] , wherein the cure inhibitor comprises a ketone, a pyrazole, a polyol, or a combination thereof.

[33] The coating composition according to any one of

[30] to

[32] , wherein the cure inhibitor comprises acetone, acetylacetone, 3,5-dimethylpyrazole, or a combination thereof.

[34] The coating composition according to any one of

[30] to

[32] , wherein the cure inhibitor comprises tetra(2-hydroxypropyl)ethylenediamine, polytetramethylene ether glycol, or a combination thereof.

[35] The coating composition according to any one of

[30] to

[34] , wherein the solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

[36] The coating composition according to any one of

[30] to

[34] , wherein the solvent comprises naphtha, xylene, butyl acetate, or a combination thereof.

[37] The coating composition according to any one of

[30] to

[36] , wherein the composition has a pot life of more than 15 minutes.

[38] The coating composition according to any one of

[30] to

[36] , wherein the composition has a pot life of more than 30 minutes.

[39] A method for repairing an article comprising a first coating, the method comprising applying the coating composition according to any one of [1] to

[10] or

[30] to

[38] to at least a portion of the article.

[40]

[39] The method of

[39] , wherein the first coating comprises a polyurea composition, a polyaspartic composition, a polyurethane composition, or a combination thereof.

[41] The method of

[39] or

[40] , further comprising preparing at least the portion of the article prior to applying the coating composition.

[42]

[41] The method of

[41] , wherein preparing at least the portion of the article comprises sanding or scrubbing at least the portion of the article.

[43]

[41] The method of

[42] or

[43] , wherein preparing at least the portion of the article comprises adding a filler material and / or a base layer comprising a second coating composition to at least the portion of the article.

[44] The method according to any one of

[39] to

[43] , wherein applying the coating composition comprises extruding, spraying, troweling, brushing, and / or rolling.

[45] The method of

[44] , wherein the spraying comprises air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low pressure static mix spray.

[46]

[44] The method of

[44] , wherein applying further comprises using a static mixer.

[47] The method according to any one of

[39] to

[46] , further comprising smoothing and / or polishing the coating composition after the coating composition has gelled on the article.

[48] The method according to any one of

[39] to

[47] , wherein the coating composition has a pot life of more than 15 minutes.

[49] The method according to any one of

[39] to

[48] , wherein the coating composition is applied to voids or damaged areas of the first coating of the article.

[50] The method according to any one of

[39] to

[49] , wherein the article comprises plastic, wood, concrete, cement, geotextile, glass fiber composite, carbon fiber composite, and / or synthetic fiber composite.

[51] The method according to any one of

[39] to

[50] , further comprising contacting the coating composition with a second solvent after the coating composition has gelled on the article.

[52]

[51] The method of

[51] , wherein the second solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

[53]

[51] The method of

[52] or

[53] , wherein the second solvent blends a portion of the gelled coating composition with a portion of the article to reduce visual contrast between the gelled coating composition and the article.

[54] A kit comprising: a first part including an isocyanate component; A second portion, an amine-functional resin comprising an asparagine amine; a reactive silicone component having a molecular weight of at least 500; TiO 2 , and and a second part comprising a cure inhibitor.

[55] The kit according to

[54] , further comprising a solvent.

[56] A kit comprising: A first portion, Isocyanate component, a reactive silicone component having a molecular weight of at least 500; TiO 2 , and a first portion including a cure inhibitor; and a second part comprising an amine-functional resin comprising an asparagine amine.

[57] The kit according to

[56] , further comprising a solvent.

Claims

1. 1. A coating composition comprising: an isocyanate component; an amine-functional resin comprising an aspartic acid ester; a reactive silicone component having a molecular weight of at least 500; TiO in an amount of at least 5% by weight ２ A coating composition comprising: Moreover, the coating composition wherein the reactive silicone component comprises (i) a hydroxyl-functional silicone containing at least four reactive hydroxyl moieties, and / or (ii) an amine-functional silicone.

2. The coating composition of claim 1 further comprising a reactive diluent.

3. 3. The coating composition of claim 1, wherein the reactive silicone component is up to 7% by weight.

4. 3. The coating composition of claim 1 or 2, further comprising up to a total of 3 wt. % of non-reactive surface additives.

5. 3. The coating composition of claim 1 or 2, further comprising a polysiloxane, a UV absorber, a hindered amine light stabilizer (HALS), an inorganic filler, an organic filler, a reinforcing agent, a pigment, a flame retardant, a biocide, an antimicrobial agent, or a combination thereof.

6. 3. The coating composition of claim 1, wherein the equivalents ratio of the isocyanate component to the active hydrogen of the amine-functional resin ranges from 0.85:1 to 1.4:

1.

7. 3. The coating composition of claim 1 or 2, wherein the amine-functional resin further comprises a primary amine and / or a secondary amine.

8. 3. The coating composition of claim 1 or 2, wherein the amine-functional resin further comprises an aromatic amine or an aliphatic amine.

9. 3. The coating composition of claim 1 or 2, wherein the isocyanate component comprises a prepolymer formed from isophorone diisocyanate and a polyether polyol and / or a polyether amine.

10. 3. The coating composition of claim 1 or 2, further comprising a catalyst comprising zinc, manganese, zirconium, titanium, cobalt, iron, lead, bismuth, or tin.

11. An article comprising a substrate comprising the coating composition of claim 1 or 2.

12. 12. The article of claim 11, comprising a bathtub, a shower enclosure, a swimming pool, a spa, a boat, a turbine blade, a precast concrete component, or a prefabricated structural component.

13. A method comprising applying to at least a portion of a substrate the coating composition of claim 1 or 2.

14. 14. The method of claim 13, further comprising adding a mold release composition to the substrate before applying the coating composition.

15. 14. The method of claim 13, further comprising applying a second layer to the first layer formed by the coating composition, the second layer having a different composition than the coating composition of the first layer.

16. 14. The method of claim 13, wherein the coating composition is applied with a spray gun by air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low pressure static mix spray.

17. The method of claim 16, wherein the spray gun has a reciprocator speed of 300 to 1000 mm / sec.

18. The method of claim 16, wherein the coating composition is applied at a rate of 4 to 20 lbs / min.

19. The method of claim 13, wherein the coating composition has a tack-free time of less than 250 seconds according to ASTM D1640-03.

20. The method of claim 13, wherein the coating composition has a dry-through time of less than 1100 seconds according to ASTM D1640-03.

21. 14. The method of claim 13, wherein the coating composition has a Shore D hardness value according to ASTM D2240-15(2021) greater than 65, and the coating composition has an alicyclic ring equivalent weight greater than 127 meq / 100g.

22. 14. The method of claim 13, wherein the coating composition has a contrast ratio (% CR) value of at least 50 at 10 mils according to ASTM D2805.

23. The method of claim 13, wherein the coating composition has an elongation of 4 to 100% according to ASTM D638-14.

24. 14. The method of claim 13, wherein the coating composition has a fire test value, edge-excluded, of less than 30 seconds according to ANSI Z124.1.2-2005 5.

6.

25. The method of claim 13, wherein the coating composition has a stain resistance value of less than 60 according to ANSI Z124.1.2-2005 5.

2.

26. The method of claim 13, wherein the coating composition is rust-resistant.

27. The method of claim 13, wherein the coating composition is chlorine resistant.

28. 1. A coating composition comprising: an isocyanate component; an amine-functional resin comprising an asparagine amine; a reactive silicone component having a molecular weight of at least 500; TiO ２ and, a cure inhibitor in an amount of at least 5 wt. %; a solvent in an amount of up to 20 wt. %; Moreover, the coating composition wherein the reactive silicone component comprises (i) a hydroxyl-functional silicone containing at least four reactive hydroxyl moieties, and / or (ii) an amine-functional silicone.

29. 30. The coating composition of claim 28, further comprising a reactive diluent.

30. 30. The coating composition of claim 28 or 29, wherein the cure inhibitor comprises a ketone, a pyrazole, a polyol, or a combination thereof.

31. 30. The coating composition of claim 28 or 29, wherein the cure inhibitor comprises acetone, acetylacetone, 3,5-dimethylpyrazole, or a combination thereof.

32. 30. The coating composition of claim 28 or 29, wherein the cure inhibitor comprises tetra(2-hydroxypropyl)ethylenediamine, polytetramethylene ether glycol, or a combination thereof.

33. 30. The coating composition of claim 28 or 29, wherein the solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

34. 30. The coating composition of claim 28 or 29, wherein the solvent comprises naphtha, xylene, butyl acetate, or a combination thereof.

35. 30. The coating composition of claim 28 or 29, wherein the composition has a pot life of greater than 15 minutes.

36. 30. A method for repairing an article comprising a first coating, the method comprising applying the coating composition of claim 1 or claim 28 to at least a portion of the article.

37. 37. The method of claim 36, wherein the first coating comprises a polyurea composition, a polyaspartic composition, a polyurethane composition, or a combination thereof.

38. 37. The method of claim 36, further comprising preparing at least the portion of the article prior to applying the coating composition.

39. 39. The method of claim 38, wherein preparing at least the portion of the article comprises sanding or scrubbing at least the portion of the article.

40. 39. The method of claim 38, wherein preparing at least the portion of the article comprises adding a filler material and / or a base layer comprising a second coating composition to at least the portion of the article.

41. 37. The method of claim 36, wherein applying the coating composition comprises extruding, spraying, troweling, brushing, and / or rolling.

42. 42. The method of claim 41, wherein the spraying comprises air purge spray, mechanical purge spray, atomized air spray, non-atomized air spray, atomized airless spray, non-atomized airless spray, air-assisted airless spray, and / or low pressure static mix spray.

43. 42. The method of claim 41, wherein applying further comprises using a static mixer.

44. 37. The method of claim 36, further comprising smoothing and / or polishing the coating composition after it has gelled on the article.

45. 37. The method of claim 36, wherein the coating composition has a pot life of greater than 15 minutes.

46. 37. The method of claim 36, wherein the coating composition is applied to voids or damaged areas of the first coating of the article.

47. 37. The method of claim 36, wherein the article comprises plastic, wood, concrete, cement, geotextile, fiberglass composite, carbon fiber composite, and / or synthetic fiber composite.

48. 37. The method of claim 36, further comprising contacting the coating composition with a second solvent after the coating composition has gelled on the article.

49. 49. The method of claim 48, wherein the second solvent comprises an aromatic hydrocarbon, a carboxylic acid ester, or a combination thereof.

50. 49. The method of claim 48, wherein the second solvent blends a portion of the gelled coating composition with a portion of an article to reduce visual contrast between the gelled coating composition and the article.

51. A kit comprising: a first part including an isocyanate component; A second portion, an amine-functional resin comprising an asparagine amine; a reactive silicone component having a molecular weight of at least 500; TiO ２ , and a second part comprising a cure inhibitor, Moreover, the reactive silicone component comprises (i) a hydroxyl-functional silicone containing at least four reactive hydroxyl moieties, and / or (ii) an amine-functional silicone.

52. 52. The kit of claim 51, further comprising a solvent.

53. A kit comprising: A first portion, Isocyanate component, a reactive silicone component having a molecular weight of at least 500; TiO ２ , and a first portion comprising a cure inhibitor; and a second part comprising an amine-functional resin comprising an asparagine amine, Moreover, the reactive silicone component comprises (i) a hydroxyl-functional silicone containing at least four reactive hydroxyl moieties, and / or (ii) an amine-functional silicone.

54. 54. The kit of claim 53, further comprising a solvent.

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