Coating compositions including functional polyamides

Abstract

Provided are compositions including: a polyisocyanate having an average of greater than two isocyanate groups per molecule; a functional polyamide having an average of greater than two reactive groups per molecule which are chemically reactive with an isocyanate group of the polyisocyanate; and a solvent; wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1:1 to 3:1. Also provided are coating compositions and coated substrates utilizing the composition.

Description

COATING COMPOSITIONS INCLUDING FUNCTIONAL POLYAMIDES

[0001] The disclosed technology relates to compositions including functional polyamides with desirable properties for use in applications such as coating compositions and / or surface protection.

[0002] Two-component (“2K”) polyurethane coating compositions are subject to constant efforts to improve properties, increase sustainability, and reduce environmental impacts of manufacture and use of these compositions. Solvent-borne 2K polyurethane coating compositions may sometimes present challenges related to volatile organic compounds which may evolve when the compositions dry / cure, and, although the solvent-borne compositions have certain superior properties, there have been efforts to replace certain solvent-borne compositions with water-borne polyurethane compositions. Such efforts are not always successful. As such, the disclosed technology utilizes novel functional polyamides in polyurethane coating compositions, with a focus on solve-borne compositions, to ameliorate at least some of the downsides associated with certain solvent-borne compositions. The disclosed technology provides a composition which may be utilized in clear and pigmented coating compositions, which have good curing characteristics with or without the use of catalysts, and which provides excellent chemical resistance and / or weatherability.

[0003] The subject matter disclosed herein provides compositions including: a polyisocyanate having an average of greater than two isocyanate groups per molecule; a functional polyamide having an average of greater than two reactive groups per molecule which are chemically reactive with an isocyanate group of the polyisocyanate; and a solvent; wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 3 : 1.

[0004] The following embodiments of the present subject matter are contemplated:

[0005] 1. A composition comprising: (a) a polyisocyanate having an average of greater than two isocyanate groups per molecule; (b) a functional polyamide having an average of greater than two reactive groups per molecule which are chemically reactive with an isocyanate group of the polyisocyanate; and (c) a solvent; wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 3: 1; wherein the functional polyamide comprises monomeric units selected from at least one oflactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, wherein: the monomeric units have an average of greater than two functional groups per monomeric unit; the functional groups of the monomeric units comprise at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups; at least a portion of the functional groups of the monomeric units react together to form linkages between the monomeric units, forming molecules of the functional polyamide; at least 30 percent of the linkages between the monomeric units are amide linkages; at least 50 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group; and the reactive groups of the functional polyamide provide a theoretical functionality to the functional polyamide of greater than two, wherein the functionality in at least 70 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional or hydroxyl -functional.

[0006] 2. The composition of embodiment 1, wherein at least 50 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0007] 3. The composition of either embodiment 1 or embodiment 2, wherein at least60 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0008] 4. The composition of any one of embodiments 1 to 3, wherein at least 70 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0009] 5. The composition of any one of embodiments 1 to 4, wherein at least 75 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0010] 6. The composition of any one of embodiments 1 to 5, wherein at least 80 weight percent of the monomeric units of the functional polyamide are derived from monomericunits selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.[00111 7. The composition of any one of embodiments 1 to 6, wherein at least 85 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0012] 8. The composition of any one of embodiments 1 to 7, wherein at least 90 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0013] 9. The composition of any one of embodiments 1 to 8, wherein at least 95 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0014] 10. The composition of any one of embodiments 1 to 9, wherein at least 99 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0015] 11 The composition of any one of embodiments 1 to 10, wherein substantially all of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

[0016] 12. The composition of any one of embodiments 1 to 11, wherein the monomeric units have an average of from greater than 2 to 20 functional groups per monomeric unit.

[0017] 13. The composition of any one of embodiments 1 to 12, wherein the monomeric units have an average of from greater than 2 to 10 functional groups per monomeric unit.

[0018] 14. The composition of any one of embodiments 1 to 13, wherein the monomeric units have an average of from greater than 2 to 5 functional groups per monomeric unit.

[0019] 15. The composition of any one of embodiments 1 to 14, wherein the monomeric units have an average of at least 3 functional groups per monomeric unit.

[0020] 16. The composition of any one of embodiments 1 to 15, wherein the monomeric units have an average of from 3 to 20 functional groups per monomeric unit.

[0021] 17. The composition of any one of embodiments 1 to 16, wherein the monomeric units have an average of from 3 to 10 functional groups per monomeric unit.

[0022] 18. The composition of any one of embodiments 1 to 17, wherein the monomeric units have an average of from 3 to 5 functional groups per monomeric unit.

[0023] 19. The composition of any one of embodiments 1 to 18, wherein at least 50 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0024] 20. The composition of any one of embodiments 1 to 19, wherein at least 60 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0025] 21. The composition of any one of embodiments 1 to 20, wherein at least 70 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0026] 22. The composition of any one of embodiments 1 to 21, wherein at least 75 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0027] 23. The composition of any one of embodiments 1 to 22, wherein at least 80 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0028] 24. The composition of any one of embodiments 1 to 23, wherein at least 85 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0029] 25. The composition of any one of embodiments 1 to 24, wherein at least 90 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0030] 26. The composition of any one of embodiments 1 to 25, wherein at least 40 percent of the linkages between the monomeric units are amide linkages.

[0031] 27. The composition of any one of embodiments 1 to 26, wherein at least 50 percent of the linkages between the monomeric units are amide linkages.

[0032] 28. The composition of any one of embodiments 1 to 27, wherein at least 60 percent of the linkages between the monomeric units are amide linkages.

[0033] 29. The composition of any one of embodiments 1 to 28, wherein at least 70 percent of the linkages between the monomeric units are amide linkages.

[0034] 30. The composition of any one of embodiments 1 to 29, wherein at least 75 percent of the linkages between the monomeric units are amide linkages.

[0035] 31. The composition of any one of embodiments 1 to 30, wherein at least 80 percent of the linkages between the monomeric units are amide linkages.

[0036] 32. The composition of any one of embodiments 1 to 31, wherein at least 85 percent of the linkages between the monomeric units are amide linkages.

[0037] 33. The composition of any one of embodiments 1 to 32, wherein at least 90 percent of the linkages between the monomeric units are amide linkages.

[0038] 34 The composition of any one of embodiments 1 to 33, wherein at least 95 percent of the linkages between the monomeric units are amide linkages.

[0039] 35. The composition of any one of embodiments 1 to 34, wherein at least 55 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0040] 36. The composition of any one of embodiments 1 to 35, wherein at least 60 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0041] 37. The composition of any one of embodiments 1 to 36, wherein at least 65 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0042] 38. The composition of any one of embodiments 1 to 37, wherein at least 70 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0043] 39. The composition of any one of embodiments 1 to 38, wherein at least 75 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0044] 40. The composition of any one of embodiments 1 to 39, wherein at least 80 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0045] 41. The composition of any one of embodiments 1 to 40, wherein at least 85 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0046] 42. The composition of any one of embodiments 1 to 41, wherein at least 90 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0047] 43. The composition of any one of embodiments 1 to 42, wherein the functional polyamide has a theoretical functionality of 3 or more.

[0048] 44. The composition of any one of embodiments 1 to 43, wherein the functional polyamide has a theoretical functionality of from greater than 2 to 30.

[0049] 45. The composition of any one of embodiments 1 to 44, wherein the functional polyamide has a theoretical functionality of from greater than 2 to 10.

[0050] 46. The composition of any one of embodiments 1 to 45, wherein the functional polyamide has a theoretical functionality of from 3 to 5.

[0051] 47. The composition of any one of embodiments 1 to 46, wherein the functionality in at least 75 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

[0052] 48. The composition of any one of embodiments 1 to 47, wherein the functionality in at least 80 mole percent of molecules of the functional polyamide is of the samefunctional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional.[00531 49. The composition of any one of embodiments 1 to 48, wherein the functionality in at least 85 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

[0054] 50. The composition of any one of embodiments 1 to 49, wherein the functionality in at least 90 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional.

[0055] 51. The composition of any one of embodiments 1 to 50, wherein the functionality in at least 95 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

[0056] 52. The composition of any one of embodiments 1 to 51, wherein the functionality in at least 96 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional.

[0057] 53. The composition of any one of embodiments 1 to 52, wherein the functionality in at least 97 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

[0058] 54. The composition of any one of embodiments 1 to 53, wherein the functionality in at least 98 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional .

[0059] 55. The composition of any one of embodiments 1 to 54, wherein the functionality in at least 99 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

[0060] 56. The composition of any one of embodiments 1 to 55, wherein the functionality in substantially all molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl- functional.

[0061] 57. The composition of any one of embodiments 1 to 56, wherein the functionality in at least 70 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0062] 58. The composition of any one of embodiments 1 to 57, wherein the functionality in at least 75 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0063] 59. The composition of any one of embodiments 1 to 58, wherein the functionality in at least 80 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0064] 60. The composition of any one of embodiments 1 to 59, wherein the functionality in at least 85 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0065] 61. The composition of any one of embodiments 1 to 60, wherein the functionality in at least 90 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0066] 62. The composition of any one of embodiments 1 to 61, wherein the functionality in at least 95 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0067] 63. The composition of any one of embodiments 1 to 62, wherein the functionality in at least 96 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0068] 64. The composition of any one of embodiments 1 to 63, wherein the functionality in at least 97 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0069] 65. The composition of any one of embodiments 1 to 64, wherein the functionality in at least 98 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0070] 66. The composition of any one of embodiments 1 to 65, wherein the functionality in at least 99 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional.

[0071] 67. The composition of any one of embodiments 1 to 66, wherein the functionality in substantially all molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0072] 68. The composition of any one of embodiments 1 to 67, wherein the functional polyamide has a number average molecular weight of from 200 to 10,000 g / mole.

[0073] 69. The composition of any one of embodiments 1 to 68, wherein the functional polyamide has a number average molecular weight of from 200 to 8,000 g / mole.

[0074] 70. The composition of any one of embodiments 1 to 69, wherein the functional polyamide has a number average molecular weight of from 200 to 6,000 g / mole.

[0075] 71. The composition of any one of embodiments 1 to 70, wherein the functional polyamide has a number average molecular weight of from 200 to 4,000 g / mole.

[0076] 72. The composition of any one of embodiments 1 to 71, wherein the functional polyamide has a number average molecular weight of from 300 to 10,000 g / mole.

[0077] 73. The composition of any one of embodiments 1 to 72, wherein the functional polyamide has a number average molecular weight of from 300 to 8,000 g / mole.

[0078] 74. The composition of any one of embodiments 1 to 73, wherein the functional polyamide has a number average molecular weight of from 300 to 6,000 g / mole.

[0079] 75. The composition of any one of embodiments 1 to 74, wherein the functional polyamide has a number average molecular weight of from 300 to 4,000 g / mole.

[0080] 76. The composition of any one of embodiments 1 to 75, wherein the functional polyamide has a number average molecular weight of from 400 to 10,000 g / mole.

[0081] 77. The composition of any one of embodiments 1 to 76, wherein the functional polyamide has a number average molecular weight of from 400 to 8,000 g / mole.

[0082] 78. The composition of any one of embodiments 1 to 77, wherein the functional polyamide has a number average molecular weight of from 400 to 6,000 g / mole.

[0083] 79. The composition of any one of embodiments 1 to 78, wherein the functional polyamide has a number average molecular weight of from 400 to 4,000 g / mole.

[0084] 80. The composition of any one of embodiments 1 to 79, wherein the functional polyamide has a number average molecular weight of from 500 to 10,000 g / mole.

[0085] 81. The composition of any one of embodiments 1 to 80, wherein the functional polyamide has a number average molecular weight of from 500 to 8,000 g / mole.

[0086] 82. The composition of any one of embodiments 1 to 81, wherein the functional polyamide has a number average molecular weight of from 500 to 6,000 g / mole.

[0087] 83. The composition of any one of embodiments 1 to 82, wherein the functional polyamide has a number average molecular weight of from 500 to 4,000 g / mole.

[0088] 84. The composition of any one of embodiments 1 to 83, wherein the functional polyamide has a number average molecular weight of from 1,000 to 10,000 g / mole.

[0089] 85. The composition of any one of embodiments 1 to 84, wherein the functional polyamide has a number average molecular weight of from 1,000 to 8,000 g / mole.

[0090] 86. The composition of any one of embodiments 1 to 85, wherein the functional polyamide has a number average molecular weight of from 1,000 to 6,000 g / mole.

[0091] 87. The composition of any one of embodiments 1 to 86, wherein the functional polyamide has a number average molecular weight of from 1,000 to 4,000 g / mole.

[0092] 88. The composition of any one of embodiments 1 to 87, wherein the functional polyamide has a viscosity of less than 100,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0093] 89. The composition of any one of embodiments 1 to 88, wherein the functional polyamide has a viscosity of less than 80,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0094] 90. The composition of any one of embodiments 1 to 89, wherein the functional polyamide has a viscosity of less than 60,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0095] 91. The composition of any one of embodiments 1 to 90, wherein the functional polyamide has a viscosity of less than 50,000 cps measured in methyl amyl ketone solvent at85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.[00961 92. The composition of any one of embodiments 1 to 91, wherein the functional polyamide has a viscosity of less than 40,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0097] 93. The composition of any one of embodiments 1 to 92, wherein the functional polyamide has a viscosity of less than 30,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0098] 94. The composition of any one of embodiments 1 to 93, wherein the functional polyamide has a viscosity of less than 20,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0099] 95. The composition of any one of embodiments 1 to 94, wherein the functional polyamide has a viscosity of less than 10,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

[0100] 96. The composition of any one of embodiments 1 to 95, wherein the functional polyamide has a hydroxyl content of from 50 to 400 mg KOH / g of functional polyamide, based on the total solids content of the functional polyamide.

[0101] 97. The composition of any one of embodiments 1 to 96, wherein the polyisocyanate has an average of from greater than 2 to 5 isocyanate groups per molecule.

[0102] 98. The composition of any one of embodiments 1 to 97, wherein the polyisocyanate has an average of from greater than 2 to 4 isocyanate groups per molecule.

[0103] 99. The composition of any one of embodiments 1 to 98, wherein the polyisocyanate has an average of from greater than 2 to 3 isocyanate groups per molecule.

[0104] 100. The composition of any one of embodiments 1 to 99, wherein the polyisocyanate has an average of from 2.1 to 5 isocyanate groups per molecule.

[0105] 101. The composition of any one of embodiments 1 to 100, wherein the polyisocyanate has an average of from 2.1 to 4 isocyanate groups per molecule.

[0106] 102. The composition of any one of embodiments 1 to 101, wherein the polyisocyanate has an average of from 2.1 to 3 isocyanate groups per molecule.

[0107] 103. The composition of any one of embodiments 1 to 102, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 3 : 1.

[0108] 104. The composition of any one of embodiments 1 to 103, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 3: 1.

[0109] 105. The composition of any one of embodiments 1 to 104, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 2: 1.

[0110] 106. The composition of any one of embodiments 1 to 105, wherein the stoichiometric ratio of the isocyanate groups of the poly isocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 2: 1.[OHl] 107. The composition of any one of embodiments 1 to 105, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 2: 1.

[0112] 108. The composition of any one of embodiments 1 to 107, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 1.6: 1.

[0113] 109. The composition of any one of embodiments 1 to 108, wherein the stoichiometric ratio of the isocyanate groups of the poly isocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 1.6: 1.

[0114] 110. The composition of any one of embodiments 1 to 109, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 1.6: 1.

[0115] 111. The composition of any one of embodiments 1 to 110, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 1.5: 1.

[0116] 112. The composition of any one of embodiments 1 to 1 11, wherein the stoichiometric ratio of the isocyanate groups of the poly isocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 1.5: 1.

[0117] 113. The composition of any one of embodiments 1 to 112, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 1.5: 1.

[0118] 114. The composition of any one of embodiments 1 to 113, wherein the solvent comprises at least one of methyl amyl ketone, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol methyl ether acetate, propyl acetate, dimethyl carbonate, or butyl acetate.

[0119] 115. The composition of any one of embodiments 1 to 114, wherein the amount of the polyisocyanate in the composition is from 10 to 35 weight percent, based on the total weight of the composition.

[0120] 116. The composition of any one of embodiments 1 to 115, wherein the amount of the polyisocyanate in the composition is from 15 to 30 weight percent, based on the total weight of the composition.

[0121] 117. The composition of any one of embodiments 1 to 116, wherein the amount of the functional polyamide in the composition is from 20 to 45 weight percent, based on the total weight of the composition.

[0122] 118. The composition of any one of embodiments 1 to 117, wherein the amount of the functional polyamide in the composition is from 25 to 40 weight percent, based on the total weight of the composition.

[0123] 119. The composition of any one of embodiments 1 to 118, wherein the amount of the solvent in the composition is from 10 to 25 weight percent, based on the total weight of the composition.

[0124] 120. The composition of any one of embodiments 1 to 119, wherein the amount of the solvent in the composition is from 15 to 20 weight percent, based on the total weight of the composition.

[0125] 121. The composition of any one of embodiments 1 to 120, wherein the composition further comprises at least one additive selected from at least one rheology modifier, at least one polymeric additive, at least one moisture scavenger, at least one dispersant, at least one pigment, at least one catalyst, at least one matting agent, at least one leveling agent, at leastone anti-popping additive, at least one defoamer, at least one antimicrobial agent, at least one surface modifier, or at least one hardener.[01261 122. The composition of any one of embodiments 1 to 121, wherein the composition comprises at least one catalyst.

[0127] 123. The composition of embodiment 122, wherein the catalyst comprises a tin- based catalyst or a tin-free catalyst.

[0128] 124. The composition of embodiment 123, wherein the tin-based catalyst comprises dibutyltin dilaurate.

[0129] 125. The composition of embodiment 124, wherein the tin-free catalyst comprises a zirconium chelate or an aluminum chelate.

[0130] 126. The composition of any one of embodiments 119 to 125, wherein the catalyst is present in the composition in an amount as low as 0.0025 percent by weight, based on the total solids content of the functional polyamide and the polyisocyanate.

[0131] 127. The composition of any one of embodiments 1 to 126, wherein the composition has a biobased content of from 20 to 40 percent, as measured by ASTM D6866- 22, Method B (AMS) TOC.

[0132] 128. The composition of any one of embodiments 1 to 127, wherein the composition has a volatile organic compounds content of 250 g / L or less, as measured by EPA Method 24.

[0133] 129. A coated substrate comprising the composition of any one of embodiments1 to 128, at least partially coated, directly or indirectly, onto a substrate, to form a coating on the substrate.

[0134] 130. The coated substrate of embodiment 129, wherein the substrate comprises at least one of metal, fiberglass, composite, plastic, wood, paper, leather, fabric, ceramic, or cementitious material.

[0135] 131. The coated substrate of either embodiment 129 or 130, wherein the substrate is a primed substrate, such that the coating is applied to the primed substrate.

[0136] 132. The coated substrate of any one of embodiments 129 to 131, wherein the coating is applied to the substrate via air-assisted spraying, airless spraying, brushing, or rolling onto the substrate.

[0137] 133. The coated substrate of any one of embodiments 129 to 132, wherein the coating has a fdm thickness of 1 to 20 mils, as measured by an electronic gauge.

[0138] 134. The coated substrate of any one of embodiments 129 to 133, wherein the coating is applied as a top coat over the substrate and at least one optional intervening coating layer, and wherein no further coating layers are applied over the top coat.

[0139] 135. The coated substrate of any one of embodiments 129 to 134, wherein the coating has an abrasion resistance of 36 mg of weight loss or less, as measured by ASTM D4060.

[0140] Various features and embodiments of the present subject matter will be described below by way of non-limiting illustration.

[0141] As used herein, the term “hydrocarbyl” refers to a group having a carbon atom directly attached to the remainder of the molecule, where the group includes at least carbon and hydrogen atoms. If the hydrocarbyl group comprises more than one carbon atom, then those carbons need not necessarily be linked to each other. For example, at least two of the carbons may be linked via a suitable element or group. In various embodiments, the term “hydrocarbyl” refers to a group having a carbon atom directly attached to the remainder of the molecule, where the group consists of carbon, hydrogen, optionally one or more heteroatoms provided the heteroatoms do not alter the predominantly hydrocarbon nature of the substituent. The heteroatom may link to at least two of the carbons in the hydrocarbyl group, and optionally no more than two non-hydrocarbon substituents. Suitable heteroatoms will be apparent to those skilled in the art and include, for instance, sulphur, nitrogen, oxygen, phosphorus, and silicon. Where the hydrocarbyl contains heteroatoms, optionally, no more than two heteroatoms will be present for every ten carbon atoms in the hydrocarbyl group. Suitable non-hydrocarbon substituents will also be apparent to those skilled in the art and include, for instance, halo, hydroxy, alkoxy, mercapto, alkylmercapto, nitro, nitroso, and sulphoxy.

[0142] Examples of hydrocarbyls within the context of the present technology therefore include: (i) hydrocarbon groups selected from aliphatic (e g. alkyl or alkenyl), alicyclic (e g. cycloalkyl, cycloalkenyl, cycloalkadienyl), and aromatic groups; (ii) substituted hydrocarbon groups, selected from hydrocarbon groups defined in (i) substituted with no more than two non- hydrocarbon substituents and / or one or more hydrocarbon substituents, the non-hydrocarbon substituents being selected from the group consisting of halo, hydroxy, alkoxy, mercapto,alkyl mercapto, nitro, nitroso, and sulphoxy; and / or (iii) hetero-containing hydrocarbon groups, selected from hydrocarbon groups defined in (i) containing one or more heteroatom in the ring or chain, provided that the group has no more than two heteroatoms present for every ten carbon atoms in the group, the heteroatoms being selected from sulphur, nitrogen, oxygen, phosphorus and silicon. The hetero-containing hydrocarbon groups may be substituted with no more than two non-hydrocarbon substituents and / or one or more hydrocarbon substituents. In certain embodiments, the term “hydrocarbyl” refers to a group having a carbon atom directly attached to the remainder of the molecule, where the group consists of carbon and hydrogen atoms.

[0143] It is known that some of the materials described herein may interact in the final formulation, so that the components of the final formulation may be different from those that are initially added. For instance, metal ions (of, e.g., a detergent) may migrate to other acidic or anionic sites of other molecules. The products formed thereby, including the products formed upon employing the composition of the present subject matter in its intended use, may not be susceptible of easy description. Nevertheless, all such modifications and reaction products are included within the scope of the present subject matter; the present subject matter encompasses the composition prepared by admixing the components described herein.

[0144] As used herein, the indefinite article “a” / “an” is intended to mean one or more than one. As used herein, the phrase “at least one” means one or more than one of the following terms. Thus, “a” / “an” and “at least one” may be used interchangeably. For example “at least one of A, B or C” means that just one of A, B or C may be included, and any mixture of two or more of A, B and C may be included, in alternative embodiments.

[0145] As used herein, the transitional term “comprising,” which is synonymous with “including,” “containing,” or “characterized by,” is inclusive or open-ended and does not exclude additional, un-recited elements or method steps. However, in each recitation of “comprising” herein, it is intended that the term also encompass, as alternative embodiments, the phrases “consisting essentially of’ and “consisting of,” where “consisting of’ excludes any element or step not specified and “consisting essentially of’ permits the inclusion of additional un-recited elements or steps that do not materially affect the essential or basic and novel characteristics of the composition or method under consideration.

[0146] Provided is a composition including: a polyisocyanate having an average of greater than two isocyanate groups per molecule; a functional polyamide having an average of greaterthan two reactive groups per molecule which are chemically reactive with an isocyanate group of the polyisocyanate; and a solvent; wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 3 : 1. In certain embodiments, the functional polyamide comprises monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, wherein: the monomeric units have an average of greater than two functional groups per monomeric unit; the functional groups of the monomeric units comprise at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups; at least a portion of the functional groups of the monomeric units react together to form linkages between the monomeric units, forming molecules of the functional polyamide; at least 30 percent of the linkages between the monomeric units are amide linkages; at least 50 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group; and the reactive groups of the functional polyamide provide a theoretical functionality to the functional polyamide of greater than two, wherein the functionality in at least 70 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional or hydroxyl-functional. The composition may be, or may be included in, a 2K polyurethane coating composition. The composition may be included in an unreacted form, such as an unreacted 2K polyurethane coating composition, or may be in reacted form, such as in a reacted coating composition, which may be coated onto a substrate. In general, but without limitation, the composition will form a polyurethane composition once the poly isocyanate and the functional polyamide chemically react with one another (potentially in the presence of other reactants and / or additives which may or may not react into the polyurethane).

[0147] As used herein, the term “functional”, in the context of a polyamide or monomeric unit, means a group on a molecule which will react with other groups; in the context of the polyamide, for example, a functional group on the polyamide will be capable of reacting with a group on another oligomer / macromonomer when forming a polymer based on the polyamide; in the context of a monomeric unit, for example, a functional group on a monomeric unit will be capable of reacting with other monomeric units to form the polyamide, and some functional groups on monomeric units may remain to create the functional groups on the polyamide (orthe functional groups on the polyamide may result from other groups during reaction of the monomeric groups to form the polyamide).

[0148] In the context of the terms “polyamide”, “polycarboxylic acid”, “polyamine”, the prefix “poly” means “more than one”.

[0149] The functional polyamide is described as comprising monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, poly carboxy lie acids, or polyamines. In this context, the term “polyamide” requires that a monomer with a functional group based on a nitrogen atom reacts with a monomer with a functional group based on an atom other than nitrogen. As such, while only one of the listed types of monomeric units is strictly required by this description, it is included in the definition of the term “polyamide” that at least two monomeric units be reacted together to form the polyamide (one with a functional group including a nitrogen atom reacting with one with a functional groups including an atom other than nitrogen), and that there be at least two amide groups present in the polyamide.

[0150] Among the monomeric units specifically described herein, lactams are a somewhat special case, in that they may not be considered to have functional groups until they are ring- opened to be reacted into a polyamide. As such, for purposes of the present disclosure, it is considered that lactams include functional groups based on their structure after they are ring- opened to react with other monomeric units. Those of ordinary skill in the relevant art understand that lactams are used in reactions such as this, and that they ring-open before or during reaction with other monomeric units.

[0151] In order to illustrate, in a non-limiting fashion, what is meant by intramolecular hydrogen bonds in the context of the present subject matter, the following illustrative chemical formulae may be considered. Formula 1 includes circled locations where intramolecular hydrogen bonds may form, and Formulas 2 and 3 show equilibrium states of Formula 1 including the intramolecular hydrogen bonds.

[0152] Similarly, Formula 4 includes circled locations where intramolecular hydrogen bonds may form, and Formula 5 shows an equilibrium state of Formula 4 including the intramolecular hydrogen bonds.

[0153] In the various permutations of the present subject matter, there are many possibilities of where intramolecular hydrogen bonds could form. A general guideline is that an intramolecular hydrogen bond may form at sites like those shown in Formulae 1 through 5, when the sites are within roughly 5 to 8 atoms of one another; this allows for enough proximity that the intramolecular hydrogen bond will form somewhat readily, and in preference to forming an intermolecular hydrogen bond. With this guidance, a person of ordinary skill in the relevant art would understand how to determine whether intramolecular hydrogen bonds may form in a specific embodiment of the present subject matter.

[0154] In certain embodiments, at least 50 (such as at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 95, at least 96, at least 97, at least 98, or at least 99) weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide. In certain embodiments, substantially all of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide. In certain embodiments, from 50 to substantially all (such as from 50 to 99, from 50 to 98, from 50 to 97, from 50 to 96, from 50 to 95, from 50 to 90, from 50 to 85, from 50 to 80, from 50 to 75, from 50 to 70, from 50 to 65, from 50 to 60, from 50 to 55, from 55 to substantially all, from 55 to 99, from 55 to 98, from 55 to 97, from 55 to 96, from 55 to 95, from 55 to 90, from 55 to 85, from 55 to 80, from 55 to 75, from 55 to 70, from 55 to 65, from 55 to 60, from 60 to substantially all, from 60 to 99, from 60 to 98, from 60 to 97, from 60 to 96, from 60 to 95, from 60 to 90, from 60 to 85, from 60 to 80, from 60 to 75, from 60 to 70, from 60 to 65, from 65 to substantially all, from 65 to 99, from 65 to 98,from 65 to 97, from 65 to 96, from 65 to 95, from 65 to 90, from 65 to 85, from 65 to 80, from 65 to 75, from 65 to 70, from 70 to substantially all, from 70 to 99, from 70 to 98, from 70 to 97, from 70 to 96, from 70 to 95, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to substantially all, from 75 to 99, from 75 to 98, from 75 to 97, from 75 to 96, from 75 to 75, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to substantially all, from 80 to 99, from 80 to 98, from 80 to 97, from 80 to 96, from 80 to 95, from 80 to 90, from 80 to 85, from 85 to substantially all, from 85 to 99, from 85 to 98, from 85 to 97, from 85 to 96, from 85 to 75, from 85 to 90, from 90 to substantially all, from 90 to 99, from 90 to 98, from 90 to 97, from 90 to 96, from 90 to 95, from 95 to substantially all, from 95 to 99, from 95 to 98, from 95 to 97, from 95 to 96, from 96 to substantially all, from 96 to 99, from 96 to 98, from 96 to 97, from 97 to substantially all, from 97 to 99, from 97 to 98, from 98 to substantially all, from 98 to 99, or from 99 to substantially all) of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide. Those of ordinary skill in the relevant art understand that commercially-available monomeric units which would be suitable for use herein generally include impurities; such impurities are not considered when referring to “the total weight of the functional polyamide”. Further, when creating the polyamide, small amounts of other materials may be used, which may end up reacting into the polyamide at very low levels, and these also are not considered when referring to “the total weight of the functional polyamide”. This also bears on the term “substantially all”, which, in this context, would mean that impurities and small amounts of other additives may be present, but that monomeric units other than those listed are not intentionally added.

[0155] In certain embodiments, the monomeric units have an average of greater than two functional groups per monomeric unit. In certain embodiments, the monomeric units have at least three functional groups per monomeric unit. In certain embodiments, the monomeric units have from 2 to 20 (such as from 2 to 19, from 2 to 18, from 2 to 17, from 2 to 16, from 2 to 15, from 2 to 14, from 2 to 13, from 2 to 12, from 2 to 11, from 2 to 10, from 2 to 9, from 2 to 8, from 2 to 7, from 2 to 6, from 2 to 5, from 2 to 4, from 2 to 3, from 3 to 20, from 3 to 19, from 3 to 18, from 3 to 17, from 3 to 16, from 3 to 15, from 3 to 14, from 3 to 13, from 3 to 12, from 3 to 11, from 3 to 10, from 3 to 9, from 3 to 8, from 3 to 7, from 3 to 6, from 3 to 5, from 3 to4, from 4 to 20, from 4 to 19, from 4 to 18, from 4 to 17, from 4 to 16, from 4 to 15, from 4 to 14, from 4 to 13, from 4 to 12, from 4 to 11, from 4 to 10, from 4 to 9, from 4 to 8, from 4 to 7, from 4 to 6, from 4 to 5, from 5 to 20, from 5 to 19, from 5 to 18, from 5 to 17, from 5 to 16, from 5 to 15, from 5 to 14, from 5 to 13, from 5 to 12, from 5 to 11, from 5 to 10, from 5 to 9, from 5 to 8, from 5 to 7, from 5 to 6, from 6 to 20, from 6 to 19, from 6 to 18, from 6 to 17, from 6 to 16, from 6 to 15, from 6 to 14, from 6 to 13, from 6 to 12, from 6 to 11, from 6 to 10, from 6 to 9, from 6 to 8, from 6 to 7, from 7 to 20, from 7 to 19, from 7 to 18, from 7 to 17, from 7 to 16, from 7 to 15, from 7 to 14, from 7 to 13, from 7 to 12, from 7 to 11, from 7 to 10, from 7 to 9, from 7 to 8, from 8 to 20, from 8 to 19, from 8 to 18, from 8 to 17, from 8 to 16, from 8 to 15, from 8 to 14, from 8 to 13, from 8 to 12, from 8 to 11, from 8 to 10, from 8 to 9, from 9 to 20, from 9 to 19, from 9 to 18, from 9 to 17, from 9 to 16, from 9 to 15, from 9 to 14, from 9 to 13, from 9 to 12, from 9 to 11, from 9 to 10, from 10 to 20, from 10 to 19, from 10 to18, from 10 to 17, from 10 to 16, from 10 to 15, from 10 to 14, from 10 to 13, from 10 to 12, from 10 to 11, from 11 to 20, from 11 to 19, from 11 to 18, from 11 to 17, from 11 to 16, from11 to 15, from 11 to 14, from 11 to 13, from 11 to 12, from 12 to 20, from 12 to 19, from 12 to18, from 12 to 17, from 12 to 16, from 12 to 15, from 12 to 14, from 12 to 13, from 13 to 20, from 13 to 19, from 13 to 18, from 13 to 17, from 13 to 16, from 13 to 15, from 13 to 14, from14 to 20, from 14 to 19, from 14 to 18, from 14 to 17, from 14 to 16, from 14 to 15, from 15 to20, from 15 to 19, from 15 to 18, from 15 to 17, from 15 to 16, from 16 to 20, from 16 to 19, from 16 to 18, from 16 to 17, from 17 to 20, from 17 to 19, from 17 to 18, from 18 to 20, from 18 to 19, or from 19 to 20) functional groups per monomeric unit.

[0156] In certain embodiments, at least 50 (such as at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, or at least 90) percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups. In certain embodiments, from 50 to 90 (such as from 50 to 85, from 50 to 80, from 50 to 75, from 50 to 70, from 50 to 65, from 50 to 60, from 50 to 55, from 55 to 90, from 55 to 85, from 55 to 80, from 55 to 75, from 55 to 70, from 55 to 65, from 55 to 60, from 60 to 90, from 60 to 85, from 60 to 80, from 60 to 75, from 60 to 70, from 60 to 65, from 65 to 90, from 65 to 85, from 65 to 80, from 65 to 75, from 65 to 70, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 90, from 80 to 85, or from 85 to 90) percent of the functional groups of themonomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

[0157] In certain embodiments, at least 30 (such as at least 35, at least 40, at least 45, at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, or at least 95) percent of the linkages between the monomeric units are amide linkages. In certain embodiments, from 30 to 95 (such as from 30 to 90, from 30 to 85, from 30 to 80, from 30 to 75, from 30 to 70, from 30 to 65, from 30 to 60, from 30 to 55, from 30 to 50, from 30 to 45, from 30 to 40, from 30 to 35, from 35 to 95, from 35 to 90, from 35 to 85, from 35 to 80, from 35 to 75, from 35 to 70, from 35 to 65, from 35 to 60, from 35 to 55, from 35 to 50, from 35 to 45, from 35 to 40, from 40 to 95, from 40 to 90, from 40 to 85, from 40 to 80, from 40 to 75, from 40 to 70, from 40 to 65, from 40 to 60, from 40 to 55, from 40 to 50, from 40 to 45, from 45 to 95, from 45 to 90, from 45 to 85, from 45 to 80, from 45 to 75, from 45 to 70, from 45 to 65, from 45 to 60, from 45 to 55, from 45 to 50, from 50 to 95, from 50 to 90, from 50 to 85, from 50 to 80, from 50 to 75, from 50 to 70, from 50 to 65, from 50 to 60, from 50 to 55, from 55 to 95, from 55 to 90, from 55 to 85, from 55 to 80, from 55 to 75, from 55 to 70, from 55 to 65, from 55 to 60, from 60 to 95, from 60 to 90, from 60 to 85, from 60 to 80, from 60 to 75, from 60 to 70, from 60 to 65, from 65 to 95, from 65 to 90, from 65 to 85, from 65 to 80, from 65 to 75, from 65 to 70, from 70 to 95, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 95, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 95, from 80 to 90, from 80 to 85, from 85 to 95, from 85 to 90, or from 90 to 95) percent of the linkages between the monomeric units are amide linkages.

[0158] In certain embodiments, at least 50 (such as at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, or at least 90) percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group. In certain embodiments, from 50 to 90 (such as from 50 to 85, from 50 to 80, from 50 to 75, from 50 to 70, from 50 to 65, from 50 to 60, from 50 to 55, from 55 to 90, from 55 to 85, from 55 to 80, from 55 to 75, from 55 to 70, from 55 to 65, from 55 to 60, from 60 to 90, from 60 to 85, from 60 to 80, from 60 to 75, from 60 to 75, from 60 to 65, from 65 to 90, from 65 to 85, from 65 to 80, from 65 to 75, from 65 to 70, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 90, from 80 to 85, or from 85 to 90)percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

[0159] In certain embodiments, the functional polyamide has a theoretical functionality of greater than two (such as 3 or more, or 4 or more). In certain embodiments, the functional polyamide has a theoretical functionality of from greater than 2 to 30 (such as from greater than 2 to 25, from greater than 2 to 20, from greater than 2 to 15, from greater than 2 to 10, from greater than 2 to 9, from greater than 2 to 8, from greater than 2 to 7, from greater than 2 to 6, from greater than 2 to 5, from 3 to 30, from 3 to 25, from 3 to 20, from 3 to 15, from 3 to 10, from 3 to 9, from 3 to 8, from 3 to 7, from 3 to 6, from 3 to 5, from 4 to 30, from 4 to 25, from 4 to 20, from 4 to 15, from 4 to 10, from 4 to 9, from 4 to 8, from 4 to 7, from 4 to 6, or from 4 to 5). It has been found that polyamides with just two functionalities may not completely react with other oligomers / macromonomers to form cured polymers. Thus, a polyamide with greater than two functionalities may improve curing over polyamides with just two functionalities, and thereby provide better properties to the resulting cured polymer.

[0160] In certain embodiments, the functionality in at least 70 (such as at least 75, at least 80, at least 85, at least 90, at least 95, at least 96, at least 97, at least 98, or at least 99, or 100) mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional. In certain embodiments, the functionality in substantially all molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional. In certain embodiments, the functionality in from 70 to 100 (such as from 70 to 99, from 70 to 98, from 70 to 97, from 70 to 96, from 70 to 95, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 100, from 75 to 99, from 75 to 98, from 75 to 97, from 75 to 96, from 75 to 95, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 100, from 80 to 99, from 80 to 98, from 80 to 97, from 80 to 96, from 80 to 95, from 80 to 90, from 80 to 85, from 85 to 100, from 85 to 99, from 85 to 98, from 85 to 97, from 85 to 96, from 85 to 95, from 85 to 90, from 90 to 100, from 90 to 99, from 90 to 98, from 90 to 97, from 90 to 96, from 90 to 95, from 95 to 100, from 95 to 99, from 95 to 98, from 95 to 97, from 95 to 96, from 96 to 100, from 96 to 99, from 96 to 98, from 96 to 97, from 97 to 100, from 97 to 99, from 97 to 98, from 98 to 100, from 98 to 99, or from 99 to 100) mole percent of molecules ofthe functional polyamide is of the same functional type, selected from at least one of aminofunctional, carboxyl-functional, or hydroxyl-functional. In certain embodiments, the functionality in from 70 (such as from 75, from 80, from 85, from 90, from 95, from 96, from 97, from 98, or from 99) mole percent of molecules, to substantially all molecules, of the functional polyamide is of the same functional type, selected from at least one of aminofunctional, carboxyl-functional, or hydroxyl-functional. In certain embodiments, the functionality in at least 70 (such as at least 75, at least 80, at least 85, at least 90, at least 95, at least 96, at least 97, at least 98, or at least 99, or 100) mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl -functional, or hydroxyl-functional. In certain embodiments, the functionality in substantially all molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional or hydroxyl-functional. In certain embodiments, the functionality in from 70 to 100 (such as from 70 to 99, from 70 to 98, from 70 to 97, from 70 to 96, from 70 to 95, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 100, from 75 to 99, from 75 to 98, from 75 to 97, from 75 to 96, from 75 to 95, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 100, from 80 to 99, from 80 to 98, from 80 to 97, from 80 to 96, from 80 to 95, from 80 to 90, from 80 to 85, from 85 to 100, from 85 to 99, from 85 to 98, from 85 to 97, from 85 to 96, from 85 to 95, from 85 to 90, from 90 to 100, from 90 to 99, from 90 to 98, from 90 to 97, from 90 to 96, from 90 to 95, from 95 to 100, from 95 to 99, from 95 to 98, from 95 to 97, from 95 to 96, from 96 to 100, from 96 to 99, from 96 to 98, from 96 to 97, from 97 to 100, from 97 to 99, from 97 to 98, from 98 to 100, from 98 to 99, or from 99 to 100) mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional or hydroxyl-functional. In certain embodiments, the functionality in from 70 (such as from 75, from 80, from 85, from 90, from 95, from 96, from 97, from 98, or from 99) mole percent of molecules, to substantially all molecules, of the functional polyamide is of the same functional type, selected from at least one of aminofunctional or hydroxyl-functional. When stating that the functionality of a molecule of the polyamide is of the same functional type, what is meant that each functional group on the polyamide is of the same type; when stating that a certain mole percentage of molecules have functionality of the same type, what is meant is that each individual molecule includes functionalities which are all the same type, but it is possible that each individual molecule couldhave a different functionality from another molecule. For example, if 35 mole percent of molecules of the polyamide have hydroxyl-functionality, and 35 mole percent of molecules of the polyamide have amino-functionality, 70 mole percent of molecules of the functional polyamide would be of the same functional type. That being said, it is also contemplated that the functionality of all molecules of the polyamide would be of the same functional type, for example 70 mole percent could be hydroxyl-functional.

[0161] In certain embodiments, the functionality in at least 70 (such as at least 75, at least 80, at least 85, at least 90, at least 95, at least 96, at least 97, at least 98, or at least 99, or 100) mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional. In certain embodiments, the functionality in substantially all molecules of the functional polyamide is of the same functional type and is hydroxyl-functional. In certain embodiments, the functionality in from 70 to 100 (such as from 70 to 99, from 70 to 98, from 70 to 97, from 70 to 96, from 70 to 95, from 70 to 90, from 70 to 85, from 70 to 80, from 70 to 75, from 75 to 100, from 75 to 99, from 75 to 98, from 75 to 97, from 75 to 96, from 75 to 95, from 75 to 90, from 75 to 85, from 75 to 80, from 80 to 100, from 80 to 99, from 80 to 98, from 80 to 97, from 80 to 96, from 80 to 95, from 80 to 90, from 80 to 85, from 85 to 100, from 85 to 99, from 85 to 98, from 85 to 97, from 85 to 96, from 85 to 95, from 85 to 90, from 90 to 100, from 90 to 99, from 90 to 98, from 90 to 97, from 90 to 96, from 90 to 95, from 95 to 100, from 95 to 99, from 95 to 98, from 95 to 97, from 95 to 96, from 96 to 100, from 96 to 99, from 96 to 98, from 96 to 97, from 97 to 100, from 97 to 99, from 97 to 98, from 98 to 100, from 98 to 99, or from 99 to 100) mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl -functional. In certain embodiments, the functionality in from 70 (such as from 75, from 80, from 85, from 90, from 95, from 96, from 97, from 98, or from 99) mole percent of molecules, to substantially all molecules, of the functional polyamide is of the same functional type and is hydroxyl-functional.

[0162] In certain embodiments, the functional polyamide has a number average molecular weight of from 200 (such as from 300, from 400, from 500, from 600, from 700, from 800, from 900, or from 1,000) to 10,000 (such as to 9,000, to 8,000, to 7,000, to 6,000, to 5,000, to 4,000, to 3,000, or to 2,000) g / mole. Number average molecular weights described herein may be measured using gel permeation chromatography (GPC) using a Waters GPC 2000 equipped with a refractive index detector and Waters Empower® data acquisition and analysis software.Samples were run against polystyrene calibration standards. The columns are polystyrene (PLgel, 5 micron, available from Agilent / Polymer Laboratories, Inc.). For the mobile phase, individual samples are dissolved in tetrahydrofuran and fdtered with PTFE filters before they are injected into the GPC port. Waters GPC 2000 Operating Conditions: Injector, Column, and Pump / Solvent compartment temperatures, 40° C; Autosampler Control: Run time, 40 minutes; Injection volume, 300 microliter; Pump, System pressure, ~90 bars (maximum pressure limit, 270 bars; minimum pressure limit, 0 psi); Flow rate, 1.0 ml / minute; Differential Refractometer, Sensitivity, -16; Scale factor: 6.

[0163] In certain embodiments, the functional polyamide has a viscosity of less than 100,000 (such as less than 90,00, less than 80,000, less than 70,000, less than 60,000, less than 50,000, less than 40,000, less than 30,000, less than 20,000, or less than 10,000) cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm. In general, room temperature is considered to be about 20 to about 25 °C, and within that range, it is expected that these viscosity measurements would not significantly vary. However, in certain embodiments, room temperature may mean any one temperature within the range of from about 20 to about 25 °C.

[0164] In certain embodiments, the functional polyamide has an acid fragment (A) as follows, connected to an amine fragment (B) as follows, which is terminated by an end group fragment (EG) as follows:wherein, independently for each fragment and each instance of each variable in each fragment: R1is a 2- to 36-carbon hydrocarbyl group; B is where the (A) fragment or the (EG) fragment connects to the (B) fragment; m is an integer of from 1 to 3; A is where the (A) fragment connects to the (B) fragment; R2is a 2- to 36-carbon hydrocarbyl group; R3is H, a 1- to 12- carbon hydrocarbyl group, R5-O-H, or R5-O-(A) (wherein R5is a 2- to 36-carbon hydrocarbyl group, and (A) is where an (A) fragment connects to the (B) fragment via the R5-0 linkage); n is an integer of from 1 to 4; X is O or NR3; R4is a 3 - to 7-carbon hydrocarbyl group; and p is 0 or an integer of from 1 to 5.

[0165] In certain embodiments, fragment (A) represents a hydrocarbyl group with from 1 to 3 carboxyl-derived groups as functionalities anywhere on the hydrocarbyl group, as opposed to a hydrocarbyl group with 1 to 3 repeating carboxyl -derived groups. In certain embodiments, the “X” in fragment (B) could be OH to provide a functional group for the polyamide, rather than joining to another (A) fragment.

[0166] The embodiment depicted by end group segment (EG), above, represents a hydroxyl-functional end group for the polyamide. Similar embodiments including other end groups are possible as set forth herein.

[0167] With regard to the number of each of segments (A), (B), and (EG), any permutations are possible which would result in a polyamide as described herein. In certain embodiments, the hydroxyl number of the resulting polyamide is from 3 to 400 mg KOH / g.

[0168] The percent of tertiary amide linkages of the total number of amide linkages may be calculated using the following equation: 100where n is the number of monomers, the index i refers to a certain monomer, wtertN is the average number nitrogen atoms in a monomer that form or are part of tertiary amide linkages in the polymerizations, (note: end-group forming amines do not form amide groups during the polymerizations and their amounts are excluded from «.v), WtotaiN is the average number nitrogen atoms in a monomer that form or are part of tertiary amide linkages in the polymerizations (note: the end-group forming amines do not form amide groups during thepolymerizations and their amounts are excluded from wtotaiN), and n, is the number of moles of the monomer with the index i.

[0169] The percent of amide linkages of the total number of all heteroatom containing linkages (connecting hydrocarbon linkages) may be calculated using the following equation: 100where Wtotais is the sum of the average number of heteroatom containing linkages (connecting hydrocarbon linkages) in a monomer and the number of heteroatom containing linkages (connecting hydrocarbon linkages) forming from that monomer by the reaction with a carboxylic acid bearing monomer during the polyamide polymerizations. “Hydrocarbon linkages” are just the hydrocarbon portion of each repeat unit formed from continuous carbon to carbon bonds (i.e. without heteroatoms such as nitrogen or oxygen) in a repeat unit. This hydrocarbon portion would be the ethylene or propylene portion of ethylene oxide or propylene oxide; the undecyl group of dodecyllactam, the ethylene group of ethylenediamine, and the (CH2)4 (or butylene) group of adipic acid.

[0170] The percent of secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group (“Linkage %”) may be calculated using the following equation: 100where wintraN.i refers to the weight fraction of an amide group capable of forming intramolecular hydrogen bonds due to the presence of carbonyl, alcohol or amine groups in the vicinity of that amide group. Intramolecular hydrogen bonds can form when the distance of a hydrogen connected to the nitrogen atom of a secondary amide group is 4 to 7, or most optimally 4 to 5 bonds away from an atom carrying lone electron pairs that are capable of forming strong intramolecular hydrogen bonds with the said hydrogen atom due to the stabilizing effect of 5 or 8, or most optimally 5 to 6 membered rings. The atom carrying the lone electron pair is preferably an alcohol or carbonyl type of oxygen or an amine type of nitrogen and the spacer between said hydrogen atom and the atom carrying the lone electron pair is preferably hydrocarbon.

[0171] In certain embodiments, the functional polyamide has a hydroxyl content of from 50 to 400 (such as from 75 to 400, from 100 to 400, from 150 to 400, from 200 to 400, from 250 to 400, from 300 to 400, from 350 to 400, from 50 to 350, from 75 to 350, from 100 to 350, from 150 to 350, from 200 to 350, from 250 to 350, from 300 to 350, from 50 to 300, from 75 to 300, from 100 to 300, from 150 to 300, from 200 to 300, from 250 to 300, from 50 to 250, from 75 to 250, from 100 to 250, from 150 to 250, from 200 to 250, from 50 to 200, from 75 to 200, from 100 to 200, from 150 to 200, from 50 to 150, from 75 to 150, from 100 to 150, from 50 to 100, from 75 to 100, or from 50 to 75) mg KOH / g of functional polyamide, based on the total solids content of the functional polyamide.

[0172] In certain embodiments, the polyisocyanate has an average of from greater than 2 to 5 isocyanate groups per molecule. In certain embodiments, the polyisocyanate has an average of from greater than 2 to 4 isocyanate groups per molecule. In certain embodiments, the poly isocyanate has an average of from greater than 2 to 3 isocyanate groups per molecule. In certain embodiments, the poly isocyanate has an average of from 2.1 to 5 isocyanate groups per molecule. In certain embodiments, the polyisocyanate has an average of from 2.1 to 4 isocyanate groups per molecule. In certain embodiments, the polyisocyanate has an average of from 2.1 to 3 isocyanate groups per molecule.

[0173] In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 3 : 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 3:1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the poly isocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 2: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the poly isocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 2: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 2: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 1.6: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.1: 1 to 1.6: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functionalpolyamide is from 1.2: 1 to 1.6: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 1.5 : 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 1.5: 1. In certain embodiments, the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.2: 1 to 1.5: 1.

[0174] In certain embodiments, the solvent comprises at least one of methyl amyl ketone, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol methyl ether acetate, propyl acetate, dimethyl carbonate, or butyl acetate.

[0175] In certain embodiments, the amount of the polyisocyanate in the composition is from 10 to 35 (such as from 15 to 35, from 20 to 35, from 25 to 35, from 30 to 35, from 10 to 30, from 15 to 30, from 20 to 30, from 25 to 30, from 10 to 25, from 15 to 25, from 20 to 25, from 10 to 20, from 15 to 20, or from 10 to 15) weight percent, based on the total weight of the composition.

[0176] In certain embodiments, the amount of the functional polyamide in the composition is from 20 to 45 (such as from 25 to 45, from 30 to 45, from 35 to 45, from 40 to 45, from 20 to 40, from 25 to 40, from 30 to 40, from 35 to 40, from 20 to 35, from 25 to 35, from 30 to 35, from 20 to 30, from 25 to 30, or from 20 to 25) weight percent, based on the total weight of the composition.

[0177] In certain embodiments, the amount of the solvent in the composition is from 10 to 25 (such as from 15 to 25, from 20 to 25, from 10 to 20, from 15 to 20, or from 10 to 15) weight percent, based on the total weight of the composition.

[0178] In certain embodiments, the composition further comprises at least one additive selected from at least one rheology modifier, at least one polymeric additive, at least one moisture scavenger, at least one dispersant, at least one pigment, at least one catalyst, at least one matting agent, at least one leveling agent, at least one anti-popping additive, at least one defoamer, at least one antimicrobial agent, at least one surface modifier, or at least one hardener.

[0179] In certain embodiments, the composition comprises at least one catalyst. In certain embodiments, the catalyst comprises a tin-based catalyst or a tin-free catalyst. In certain embodiments, the tin-based catalyst comprises dibutyltin dilaurate. In certain embodiments, the tin-free catalyst comprises a zirconium chelate or an aluminum chelate. In certainembodiments, the catalyst is present in the composition in an amount as low as 0.0025 percent by weight, based on the total solids content of the functional polyamide and the polyisocyanate.

[0180] In certain embodiments, the composition has a biobased content of from 20 to 40 (such as from 25 to 40, from 30 to 40, from 35 to 40, from 20 to 35, from 25 to 35, from 30 to 35, from 20 to 30, from 25 to 30, or from 20 to 25) percent, as measured by ASTM D6866-22, Method B (AMS) TOC.

[0181] In certain embodiments, the composition has a volatile organic compounds content of 250 g / L or less, as measured by EPA Method 24.

[0182] Also provided is a coated substrate comprising the composition described herein at least partially coated, directly or indirectly, onto a substrate, to form a coating on the substrate. In certain embodiments, the substrate comprises at least one of metal, fiberglass, composite, plastic, wood, paper, leather, fabric, ceramic, or cementitious material. In certain embodiments, the substrate is a primed substrate, such that the coating is applied to the primed substrate. In certain embodiments, the coating is applied to the substrate via air-assisted spraying, airless spraying, brushing, or rolling onto the substrate. In certain embodiments, the coating has a film thickness of 1 to 20 mils, as measured by an electronic gauge. In certain embodiments, the coating is applied as a top coat over the substrate and at least one optional intervening coating layer, and wherein no further coating layers are applied over the top coat. In certain embodiments, the coating has an abrasion resistance of 36 mg of weight loss or less, as measured by ASTM D4060.

[0183] As used herein, the term “polyurethane” means polymers which contain urethane and / or urea linkages, as is known to those of ordinary skill in the art. Polyurethanes may contain other polymers and / or materials either as physical blends or where the other polymers and / or materials are co-reacted into the polyurethane polymer.

[0184] The compositions and coating compositions described herein may be made according to known methods for making polyurethane compositions and / or coating compositions.

[0185] The subject matter disclosed herein may be better understood with reference to the following examples, which are set forth merely to further illustrate the subject matter disclosed herein. The illustrative examples should not be construed as limiting the subject matter in any manner.

[0186] Example functional polyamides (Polyamides A through C) were prepared as follows, with amounts of each component (in grams) being shown in Table 1.Table 1*The heat stabilizer was BRUGGOLEN® H10, from L Bruggemann GmbH & Co. KG, Heilbronn, Germany.

[0187] Polyamide A: Hydrogenated dimer acid, diethanolamine and heat stabilizer were charged to a reactor equipped with a column (Vigreux) and a condenser. The reactor was flushed with nitrogen, heated to 130 °C under 50 mbar pressure and held for 20 h. Then deoxygenated caprolactone was added to the reactor and the polyol was reacted at 150 °C for 12 h at atmospheric pressure under nitrogen atmosphere. The batch was cooled to 50 °C, the product is a clear viscous liquid at 50 °C.

[0188] Polyamide B: Hydrogenated dimer acid, N-(2-hydroxyethyl)ethylenediamine, N-methyl ethanol amine and heat stabilizer were charged to a reactor equipped with a column (Vigreux) and a condenser. The reactor was flushed with nitrogen, heated to 150 °C and held for 6 h at atmospheric pressure, then at 500 mbar for 24 h and then reduced to 40 mbar for 1 h. The reactor was filled with nitrogen and cooled to 50 °C. Methyl amyl ketone was charged and mixed for 1 h at 50 °C. The batch was then cooled to room temperature. The product is a clear viscous liquid at room temperature.

[0189] Polyamide C: Hydrogenated dimer acid, diethanolamine and heat stabilizer were charged to a reactor equipped with a column (Vigreux) and a condenser. The reactor was flushed with nitrogen, heated to 130 °C under 50 mbar pressure and held for 20 h. Then the reactor was filled with nitrogen and the batch was cooled to 50 °C. Methyl amyl ketone was charged and mixed for 1 h at 50 °C. The batch was then cooled to room temperature. The product is a clear viscous liquid at room temperature.

[0190] Examples 1 to 4 and 6 were prepared by the following process, with compositional information being provided in Table 2 (all amounts shown in weight percentage), below: The functional polyamides (Polyamide A, Polyamide B, or Polyamide C, as indicated) was weighed out into a metal container, and then it was fixed under the high speed dispersor. The agitation was turned on. Dispersion stage: The hyperdispersant was added to the metal container under gentle mixing. Then, the pigment and solvent were mixed in gradually, following the order as listed in Table 2, and the blend was dispersed for 10 minutes under high speed, creating a donut shape vortex. The fineness of dispersion was evaluated by ASTM D1210-05 using a Hegman- type gage. A reading of 8.0 Hegman was required to continue. Letdown stage: All the materials were added continuously under gentle speed and the order as listed in Table 2. Then, the coating was mixed for 10 minutes to ensure good homogenization. Finally, the composition was filtered with 75 microns Nylon bag, resulting in the Part A compositions, and let to rest for at least 24 hours, before testing and application. Example 5 was prepared according to a similar process, except that the dispersion stage was not needed due to absence of pigment, and all the materials were gradually added under mixing as in the letdown stage.

[0191] After resting, the Part A was individually agitated and then it was mixed with Part B ingredients as shown in Table 2, for 3 minutes. The ready -to- spray blend was applied over ground cold rolled steel and / or blasted steel, previously cleaned with acetone-wet paper towel. Next, the fdm was allowed to cure for 7 days at ambient conditions. The adhesion and QUV data are based off performance over blasted epoxy-primed steel. An 80 / 20 methyl amyl ketone / methyl ethyl ketone blend was used as reducer depending on the application method.Table 2

[0192] Performance testing for each example was performed with results as shown in Table3, according to the following test methods: Dry Film Thickness (“DF”, reported in mils) was tested according to ASTM E797-21; Adhesion (“A”) was tested according to ASTM D3359- 23; Gloss (“G”) 20760° Angle was tested according to ASTM D523-14; Pencil Hardness(“PHD”) was tested according to ASTM D3363-05; Methyl Ethyl Ketone Resistance (“MEKR”, Spot Test) was tested according to ASTM D1308-20; Impact Resistance (“IRST”, Direct / Reverse, reported in inch / pounds) was tested according to ASTM D2794-93; and Accelerated Weathering Resistance (“AWR”, lOOOh QUV-A) was tested according to ASTM G154-23, Cycle 1, with dE and Gloss Retention (“GR”) being reported.Table 3

[0193] These results show that coating compositions based on functional polyamides form top coating films capable to reach high glosses but also showing versatility of the chemistry toprovide lower glosses without the use of flattening agents to do so. The compositions exhibit good gloss retention and low color change against accelerated weatherability, without the addition of ultraviolet light absorbers and stabilizers, which is a very relevant property for a top coating and a good indicator of the performance of the functional polyamides when used in a top coating. Furthermore, these coatings display very good mechanical and chemical resistance properties, measured through pencil hardness, Methyl Ethyl Ketone spot test, and impact resistance; confirming these functional polyamides are capable of create polyurethane coating films of high performance.

[0194] Except in the Examples, or where otherwise explicitly indicated or required by context, all numerical quantities in this description specifying amounts of materials, reaction conditions, molecular weights, number of carbon atoms, and the like, are to be understood as modified by the word “about”. As used herein, the term “about” means that a value of a given quantity is within ±20% of the stated value. In other embodiments, the value is within ±15% of the stated value. In other embodiments, the value is within ±10% of the stated value. In other embodiments, the value is within ±5% of the stated value. In other embodiments, the value is within ±2.5% of the stated value. In other embodiments, the value is within ±1% of the stated value. In other embodiments, the value is within a range of the explicitly-described value which would be understood by those of ordinary skill, based on the disclosures provided herein, to perform substantially similarly to compositions including the literal amounts described herein.

[0195] It is to be understood that the upper and lower amount, range, and ratio limits set forth herein may be independently combined, and that any amount within a disclosed range is contemplated to provide a minimum or maximum of a narrower range in alternative embodiments (with the proviso, of course, that the minimum amount of a range must be lower than the maximum amount of the same range). Similarly, the ranges and amounts for each element of the subject matter disclosed herein may be used together with ranges or amounts for any of the other elements.

[0196] While certain representative embodiments and details have been shown for the purpose of illustrating the subject matter disclosed herein, it will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from thescope of the subject matter. Tn this regard, the scope of the invention is to be limited only by the following claims.

Claims

What is claimed is:

1. A composition comprising: a. a polyisocyanate having an average of greater than two isocyanate groups per molecule; b. a functional polyamide having an average of greater than two reactive groups per molecule which are chemically reactive with an isocyanate group of the polyisocyanate; and c. a solvent; wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1 : 1 to 3 : 1 ; wherein the functional polyamide comprises monomeric units selected from at least one of lactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, wherein: the monomeric units have an average of greater than two functional groups per monomeric unit; the functional groups of the monomeric units comprise at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups; at least a portion of the functional groups of the monomeric units react together to form linkages between the monomeric units, forming molecules of the functional polyamide; at least 30 percent of the linkages between the monomeric units are amide linkages; at least 50 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group; and the reactive groups of the functional polyamide provide a theoretical functionality to the functional polyamide of greater than two, wherein the functionality in at least 70 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional or hydroxyl-functional.

2. The composition of claim 1, wherein at least 50 weight percent of the monomeric units of the functional polyamide are derived from monomeric units selected from at least one oflactams, aminocarboxylic acids, aminoalcohols, polycarboxylic acids, or polyamines, based on the total weight of the functional polyamide.

3. The composition of either claim 1 or claim 2, wherein the monomeric units have an average of at least 3 functional groups per monomeric unit.

4. The composition of any one of claims 1 to 3, wherein at least 50 percent of the functional groups of the monomeric units are selected from at least one of primary amine groups, secondary amine groups, carboxyl groups, or hydroxyl groups.

5. The composition of any one of claims 1 to 4, wherein at least 40 percent of the linkages between the monomeric units are amide linkages.

6. The composition of any one of claims 1 to 5, wherein at least 55 percent of the amide linkages are: (i) tertiary amide linkages; and / or (ii) secondary amide linkages capable of individually forming an intramolecular hydrogen bond with a carbonyl group or an ether group.

7. The composition of any one of claims 1 to 6, wherein the functional polyamide has a theoretical functionality of 3 or more.

8. The composition of any one of claims 1 to 7, wherein the functionality in at least 75 mole percent of molecules of the functional polyamide is of the same functional type, selected from at least one of amino-functional, carboxyl-functional, or hydroxyl-functional.

9. The composition of any one of claims 1 to 8, wherein the functionality in at least 70 mole percent of molecules of the functional polyamide is of the same functional type and is hydroxyl-functional.

10. The composition of any one of claims 1 to 9, wherein the functional polyamide has a number average molecular weight of from 200 to 10,000 g / mole.

11. The composition of any one of claims 1 to 10, wherein the functional polyamide has a viscosity of less than 100,000 cps measured in methyl amyl ketone solvent at 85% solids at room temperature, as measured by a Brookfield circular disk viscometer with the circular disk spinning at 5 rpm.

12. The composition of any one of claims 1 to 11 , wherein the functional polyamide has a hydroxyl content of from 50 to 400 mg KOH / g of functional polyamide, based on the total solids content of the functional polyamide.

13. The composition of any one of claims 1 to 12, wherein the polyisocyanate has an average of from greater than 2 to 5 isocyanate groups per molecule.

14. The composition of any one of claims 1 to 13, wherein the stoichiometric ratio of the isocyanate groups of the polyisocyanate to the reactive groups of the functional polyamide is from 1.1 : 1 to 3 : 1.

15. The composition of any one of claims 1 to 14, wherein the solvent comprises at least one of methyl amyl ketone, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol methyl ether acetate, propyl acetate, dimethyl carbonate, or butyl acetate.

16. The composition of any one of claims 1 to 15, wherein the amount of the polyisocyanate in the composition is from 10 to 35 weight percent, based on the total weight of the composition.

17. The composition of any one of claims 1 to 16, wherein the amount of the functional polyamide in the composition is from 20 to 45 weight percent, based on the total weight of the composition.

18. The composition of any one of claims 1 to 17, wherein the amount of the solvent in the composition is from 10 to 25 weight percent, based on the total weight of the composition.

19. The composition of any one of claims 1 to 18, wherein the composition further comprises at least one additive selected from at least one rheology modifier, at least one polymeric additive, at least one moisture scavenger, at least one dispersant, at least one pigment, at least one catalyst, at least one matting agent, at least one leveling agent, at least one antipopping additive, at least one defoamer, at least one antimicrobial agent, at least one surface modifier, or at least one hardener.

20. The composition of any one of claims 1 to 19, wherein the composition comprises at least one catalyst.

21. The composition of claim 20, wherein the catalyst comprises a tin-based catalyst or a tin-free catalyst.

22. The composition of claim 21, wherein the tin-based catalyst comprises dibutyltin dilaurate.

23. The composition of claim 22, wherein the tin-free catalyst comprises a zirconium chelate or an aluminum chelate.

24. The composition of any one of claims 18 to 23, wherein the catalyst is present in the composition in an amount as low as 0.0025 percent by weight, based on the total solids content of the functional polyamide and the polyisocyanate.

25. The composition of any one of claims 1 to 24, wherein the composition has a biobased content of from 20 to 40 percent, as measured by ASTM D6866-22, Method B (AMS) TOC.

26. The composition of any one of claims 1 to 25, wherein the composition has a volatile organic compounds content of 250 g / L or less, as measured by EPA Method 24.

27. A coated substrate comprising the composition of any one of claims 1 to 26, at least partially coated, directly or indirectly, onto a substrate, to form a coating on the substrate.

28. The coated substrate of claim 27, wherein the substrate comprises at least one of metal, fiberglass, composite, plastic, wood, paper, leather, fabric, ceramic, or cementitious material.

29. The coated substrate of either claim 27 or claim 28, wherein the substrate is a primed substrate, such that the coating is applied to the primed substrate.

30. The coated substrate of any one of claims 27 to 29, wherein the coating is applied to the substrate via air-assisted spraying, airless spraying, brushing, or rolling onto the substrate.

31. The coated substrate of any one of claims 27 to 30, wherein the coating has a film thickness of 1 to 20 mils, as measured by an electronic gauge.

32. The coated substrate of any one of claims 27 to 31, wherein the coating is applied as a top coat over the substrate and at least one optional intervening coating layer, and wherein no further coating layers are applied over the top coat.

33. The coated substrate of any one of claims 27 to 32, wherein the coating has an abrasion resistance of 36 mg of weight loss or less, as measured by ASTM D4060.

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