Aqueous polyester coating composition method of making, and...

C - Chemistry – Metallurgy – 08 – L

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400/5135, 400/54

C08L 27/06 (2006.01) C08G 63/553 (2006.01) C08G 63/676 (2006.01) C09D 167/06 (2006.01) H01B 3/42 (2006.01)

Patent

CA 1109578

ABSTRACT OF THE DISCLOSURE A water dispersible polyester resin solution is made by esterifying a mixture, consisting of: about 2.0 moles to about 5.0 moles of an organic, dicarboxylic acid selected from at least one, of an aromatic dicarboxylic acid, and tetrahydrophthalic acid; about 0.1 mole to about 1.5 moles of an organic, unsaturated aliphatic dicarboxylic acid; about 0.1 mole to about 6.5 moles of an organic, saturated aliphatic dicarboxylic acid; about 1.0 mole to about 5.0 moles of an organic, alicyclic dihydric alcohol; 0 mole to about 500 moles of an organic, aliphatic dihydric alcohol and about 0.6 mole to about 1.2 moles of a compound effective to cause cross linking; and adding an amount of organic solvent effective to provide a solution of between about 50 wt.% to about 90 wt.% solids content; wherein the esterification reaction is continued until the acid value drops to between about 45 to about 65, and wherein the mole ratio of OH/COOH = 0.30 to 0.90.

298114

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