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WO 2016/183279 Al 17 November 2016 (17.11.2016) P O P C T

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WO 2016/183279 Al 17 November 2016 (17.11.2016) P O P C T (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization I International Bureau (10) International Publication Number (43) International Publication Date WO 2016/183279 Al 17 November 2016 (17.11.2016) P O P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every C09D 175/16 (2006.01) C08G 18/73 (2006.01) kind of national protection available): AE, AG, AL, AM, C08G 18/67 (2006.01) AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, (21) Number: International Application DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, PCT/US20 16/03 1997 HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, (22) International Filing Date: KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, 12 May 2016 (12.05.2016) MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (25) Filing Language: English SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, (26) Publication Language: English TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: (84) Designated States (unless otherwise indicated, for every 62/160,094 12 May 2015 (12.05.2015) US kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, (71) Applicant: RHODIA OPERATIONS [FR/FR]; 25, Rue TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, De Clichy, 75009 Paris (FR). TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, (72) Inventors; and LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, (71) Applicants (for US only): ZHOU, Lichang [US/US]; 8 SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, Yorkshire Village Rd., Lawrenceville, NJ 08648 (US). GW, KM, ML, MR, NE, SN, TD, TG). HUGHES, John [US/US]; 122 Westview Dr., Lincoln University, PA 19352 (US). PAKENHAM, Derek Published: [GB/US]; 3029 E. State Street Ext., Hamilton, NJ 08619 — with international search report (Art. 21(3)) (US). (74) Agents: PACHO, Jericho, B. et al; SOLVAY USA INC., 504 Carnegie Center, Princeton, NJ 08540 (US). (54) Title: DISPERSING AIDS OR BLENDS THEREOF TO PREPARE UNIVERSAL COLORANTS FOR AQUEOUS AND NON-AQUEOUS PAINTS AND COATING (57) Abstract: Disclosed are novel dispersants for universal colorant systems, novel colorant systems and related method of prepar ing said systems. Also disclosed are methods of dispersing at least one pigment to prepare a universal colorant system, as well as methods for preparing coatings and paints utilizing the disclosed colorant systems. DISPERSING AIDS OR BLENDS THEREOF TO PREPARE UNIVERSAL COLORANTS FOR AQUEOUS AND NON-AQUEOUS PAINTS AND COATING CROSS-REFERENCE TO RELATED APPLICATIONS [0001 ] This application claims the benefit of US Provisional Patent Application No. 62/160,094 filed May 12, 2015, incorporated herein by reference in its entirety. FIELD OF THE INVENTION [001]The present invention relates to novel dispersing aids or blends thereof, as well as compositions and methods for utilizing these dispersants or blends in various paint and coatings applications. BACKGROUND OF THE INVENTION [002]Colorants, typically, are compositions of pigment, dispersants, carrier/solvents, and other components, which are used to add color, via pigments, to tint-based paint systems usually at the point-of-sale. Pigments are typically organic or inorganic dry powders that incorporate a mixture of primary particles, aggregates and agglomerates, which must be wetted in the carrier or solvent. Dispersants are widely used in coating industries to disperse colorants, including inorganic or organic pigments. Dispersants can be divided to small molecules and polymers with varied chemistries. Most widely used polymeric dispersants are based on acrylic acid homopolymer or copolymers. The current state-of-the art systems use polymeric dispersants specific for the system used, or through dispersants that can be used in both solvent-borne and water-borne systems (hereafter referred to as universal dispersants), but that are used with solvents (like acetates or ketones) that can be miscible in both types of paints. For the universal colorants currently on the market, they face drawbacks in that they typically have a high level of solvents added that contribute significantly to a paint's overall VOC content. However, in the current regulatory environment, the paint formulators are trying to reduce the VOC contents in new paints to a near zero level. Current commercial dispersants, however, contain only 50% active and use solvents to reduce the actives level. [003]Some colorants contain VOCs (volatile organic compounds) that can directly influence the total VOCs contained in a paint or coating. With VOC regulations enforcing lower limits, paint formulators currently have a difficult time meeting regulations when using traditional universal colorants. SUMMARY OF THE INVENTION [004] In one aspect, disclosed are dispersant aids or blends thereof for use in colorant dispersions. In another aspect, disclosed are universal colorant systems for low VOC paint and coatings formulations comprising: (i) pigment, (ii) the dispersing aid or dispersant system described herein and (iii), optionally, a carrier. Typically, the universal colorant system (herein otherwise used interchangeably with "liquid colorant compositions") is in liquid form and, in another embodiment, at least one dispersant is used as both a dispersant and carrier. In another aspect, disclosed are methods for preparing said colorant systems. In yet another aspect, disclosed are paints or coatings containing said colorant systems. In one embodiment, the paints are solvent-borne (e.g., alkyd) and/or waterborne base paints, which contain low amounts of or are substantially free of volatile organic compounds. In a further aspect, disclosed are methods for preparing said paints or coatings. [005]The present invention includes compositions such as liquid dispersions comprising universal colorant systems, which comprise the dispersing aids or blends, as described herein. In particular the invention is also directed using the universal colorant system in low VOC paint and coatings applications. [006]The dispersant aids or dispersant blends, in another embodiment, are components or additives for latex binders, paints and aqueous coatings, typically as to aid in dispersing generally hydrophobic compounds such as pigments and the like. The aqueous coating compositions as described herein typically include at least one latex polymer derived from at least one monomer, for example acrylic monomers. The at least one latex polymer in the aqueous coating composition can be a pure acrylic, a styrene acrylic, a vinyl acrylic or an acrylated ethylene vinyl acetate copolymer and is more preferably a pure acrylic. The at least one latex polymer is preferably derived from at least one acrylic monomer selected from the group consisting of acrylic acid, acrylic acid esters, methacrylic acid, and methacrylic acid esters. For example, the at least one latex polymer can be a butyl aerylate/methyl methacrylate copolymer or a 2-ethylhexyl acrylate/methyl methacrylate copolymer. Typically, the at least one latex polymer is further derived from one or more monomers selected from the group consisting of styrene, alpha-methyl styrene, vinyl chloride, acrylonitrile, methacrylonitrile, ureido methacrylate, vinyl acetate, vinyl esters of branched tertiary monocarboxylic acids, itaconic acid, crotonic acid, maleic acid, fumaric acid, ethylene, and C4-Cs conjugated dienes. [007]Latex paint formulations typically comprise additives, e.g., at least one pigment. In a preferred embodiment of the invention the latex paint formulation includes at least one pigment selected from the group consisting of Ti02, CaC03, clay, aluminum oxide, silicon dioxide, magnesium oxide, sodium oxide, potassium oxide, talc, barytes, zinc oxide, zinc sulfite and mixtures thereof. [008] In addition to the above components, the colorant systems and/or aqueous coating compositions as described herein can include one or more additives selected from the group consisting of dispersants, surfactants, rheology modifiers, defoamers, thickeners, biocides, mildewcides, colorants, waxes, perfumes and co-solvents. [009]Compositions of the present invention may have an absence of one or more of anionic surfactant, cationic surfactant, nonionic surfactant, zwitterionic surfactant, and/or amphoteric surfactant. [001 0] As described herein, dispersing aids or dispersant blends to make universal colorant systems can be used in aqueous and non-aqueous solutions (from low polarity to high polarity solvents) that are up to 100% active with low/no VOCs. In one embodiment, the dispersing aids are up to 90% active with low/no VOCs. In one embodiment, the dispersing aids are up to 80% active with low/no VOCs. In one embodiment, the dispersing aids are up to 60% active with low/no VOCs. In one embodiment, the dispersing aids are up to 95% active with low/no VOCs. In one embodiment, the dispersing aids are up to 98% active with low/no VOCs. In one embodiment, the dispersing aids are up to 99% active with low/no VOCs. In one embodiment, the dispersing aids are up to 93% active with low/no VOCs. In one embodiment, the dispersing aids are up to 96% active with low/no VOCs [001 1] Low VOC (Volatile Organic Content) in some embodiments mean a VOC level of less than about 100 g/L, or less than or equal to about 90 g/L, or less than or equal to about 80 g/L, or less than or equal to about 70 g/L, or less than or equal to about 60 g/L, or less than or equal to about 50 g/L, or less than or equal to about 40 g/L.
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