US 12,240,990 B2
Coatings with improved scratch resistance
Stacey James Marsh, Church Hill, TN (US); Philip Jerome Geiger, Kingsport, TN (US); and John Evan Boisseau, Kingsport, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/250,990
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed Oct. 7, 2019, PCT No. PCT/US2019/054917
§ 371(c)(1), (2) Date Apr. 8, 2021,
PCT Pub. No. WO2020/076663, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/744,163, filed on Oct. 11, 2018.
Prior Publication US 2021/0348017 A1, Nov. 11, 2021
Int. Cl. C09D 167/02 (2006.01); C09D 7/20 (2018.01)
CPC C09D 167/02 (2013.01) [C09D 7/20 (2018.01)] 11 Claims
 
1. A coating comprising:
A. about 2 to about 50 weight percent, based on the total weight of (A), (B) and (C) of a curable, aliphatic polyester resin comprising:
i. diacid residues, comprising at least 90 mole percent, based on the total moles of diacid residues, of the residues of at least one aliphatic diacid, wherein 0 to 40 mole percent of the at least one aliphatic diacid is an alicyclic diacid and 60 to 100 mole percent of the at least one aliphatic diacid is a linear diacid having between 4 and 12 carbons;
ii. diol residues, comprising a) about 25 to 100 mole percent, based on the total moles of diol residues, of the residues of a diol having the structure:

OG Complex Work Unit Chemistry
wherein R1, R2, R3, and R4 each independently represent an alkyl radical, and b) 0 to 75 mole percent based on the total moles of diol residues, of a C2-C20 diol selected from the group consisting of 2,2-dimethyl-1,3-propanediol, 1,2 cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4 cyclohexanedimethanol, 2,2,4-trimethyl-1,3-pentanediol, hydroxypivalyl hydroxypivalate, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 2-ethyl-2-isobutyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2,4,4-tetramethyl-1,6-hexanediol, 1,10-decanediol, 1,4-benzenedimethanol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, and 2,2-bis(hydroxymethyl)propionic acid;
iii. about 5 to about 80 mole percent of the residues of at least one polyol, based on the total moles of diol and polyol residues;
B. about 15 to about 85 weight percent, based on the total weight of (A), (B), and (C) of at least one acrylic copolymer of ethylenically unsaturated monomers containing carbamate and/or hydroxy functional groups;
C. about 10 to about 50 weight percent, based on the total weight of (A), (B), and (C), of at least one crosslinker comprising at least one compound reactive with a carbamate and/or hydroxyl group; and
D. about 10 to about 60 weight percent, based on the total weight of (A), (B), (C), and (D) of at least one non-aqueous solvent.