US 12,134,705 B2
Scratch resistant thermosetting coating compositions
Philip Jerome Geiger, Kingsport, TN (US); Stacey James Marsh, Church Hill, TN (US); and John Evan Boisseau, Kingsport, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/250,991
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed Oct. 7, 2019, PCT No. PCT/US2019/054918
§ 371(c)(1), (2) Date Apr. 8, 2021,
PCT Pub. No. WO2020/076664, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/744,166, filed on Oct. 11, 2018.
Prior Publication US 2021/0380835 A1, Dec. 9, 2021
Int. Cl. C09D 167/02 (2006.01); B05D 7/00 (2006.01); C08G 63/199 (2006.01); C08K 5/205 (2006.01); C08K 5/3492 (2006.01); C09D 133/08 (2006.01)
CPC C09D 167/02 (2013.01) [B05D 7/53 (2013.01); C08G 63/199 (2013.01); C08K 5/205 (2013.01); C08K 5/34922 (2013.01); C09D 133/08 (2013.01); B05D 2425/01 (2013.01)] 6 Claims
 
1. A clear coating composition comprising:
A. 50-95 weight percent, based on the total weight of (A) and (B), of at least one curable, aliphatic polyester, comprising residues of:
i. A hydroxyl component, said hydroxyl component comprising the residues of:
a. from 30 to 80 mole %, based on the total moles of (a) and (b), of 2,2,4,4-tetraalkylcyclobutane-1,3-diol (TACD);
b. from 20 to 70 mole %, based on the total moles of (a) and (b), of diols and polyols other than TACD; and
ii. a diacid component, said diacid component comprising the residues of at least one aliphatic dicarboxylic acid comprising;
c. 0 to 100 mole %, based on the total moles of the diacids (c) and (d) of an alicyclic dicarboxylic acid; and
d. 0 to 100 mole %, based on the total moles of the diacids (c) and (d), of an acyclic aliphatic diacid; and
B. from 5-50 weight percent, based on the total weight of (A) and (B) a melamine crosslinker;
wherein the curable polyester has a hydroxyl number of 50 to 500 mgKOH/g of resin, a number average molecular weight of 500 to 10,000, a Tg of −45° C. to −12.5° C., and an acid number of 0 to 20 mgKOH/g resin.