	US 12,378,434 B2
	Curable coating compositions
Thauming Kuo, Kingsport, TN (US); and Nick Allen Collins, Fall Branch, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/309,118
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed Dec. 6, 2019, PCT No. PCT/US2019/064868 § 371(c)(1), (2) Date Apr. 27, 2021, PCT Pub. No. WO2020/123278, PCT Pub. Date Jun. 18, 2020.
Claims priority of provisional application 62/777,876, filed on Dec. 11, 2018.
Prior Publication US 2021/0388229 A1, Dec. 16, 2021
Int. Cl. C08K 5/07 (2006.01); C08G 63/18 (2006.01); C08G 63/82 (2006.01); C08K 5/00 (2006.01); C09D 167/02 (2006.01)

CPC C09D 167/02 (2013.01) [C08G 63/18 (2013.01); C08G 63/82 (2013.01); C08K 5/0025 (2013.01); C08K 5/07 (2013.01)]

15 Claims

1. A curable coating composition comprising:

I. a polyester having two or more beta-ketoester groups, wherein said polyester (I) is an acetoacetate functional polyester comprising the residues of

a. a hydroxyl component comprising:

i. a diol in an amount ranging from 70 to 97 mole %, based on the total moles of (i) and (ii); and

ii. a polyol in an amount ranging from 3 to 30 mole %, based on the total moles of (i) and (ii), wherein the polyol is one or more of 1,1,1-trimethylol propane, 1,1,1-trimethylolethane, glycerin, and pentaerythritol;

b. a carboxyl component comprising a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and

c. an alkyl acetoacetate, a diketene, or a combination thereof in an amount ranging from about 5 to about 50 weight %, based on the total weight of (a), (b), and (c)

II. a curing agent having two or more aldehyde functional groups, wherein the curing agent is selected from the group consisting of 1,3-cyclohexanedicarboxaldehyde, 1,4-cyclohexanedicarboxaldehyde, mixtures of 1,3-and 1,4-cyclohexanedicarboxaldehyde, 2,6-norbornanedicarboxaldehyde, 2,5-norbornane-dicarboxaldehyde, cyclododecane-1,4,8-tricarbaldehyde, and 3, (4-formylcyclohexyl) propanal, and

III. a basic catalyst, wherein the basic catalyst is one or more selected from the group consisting of 1,8-diazabicyclo-[5.4.0] undec-7-ene, 1,5-diazabicyclo [4.3.0] non-5-ene, 1,5,7-triazabicyclo [4.4.0] dec-5-ene, 7-methyl-1,5,7- triazabicyclo [4.4.0] dec-5-ene (MTBD), 1,1,3,3-tetramethylguanidine, and 1,4-diazabicyclo [2.2.2] octane.