Coatings with flexible hyperbranched polyols
AssigneeBASF Coatings GmbH
InventorEmerson Keith Colyer
Life of this patent
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Abstract
A coating composition includes a flexible hyperbranched polyol preparable by (a) reacting a polyol comprising at least three hydroxyl groups with an aliphatic dicarboxylic acid having from 6 to 36 carbon atoms or an esterifiable derivative of the aliphatic dicarboxylic acid to form a hydroxyl-functional first intermediate product; (b) reacting the first intermediate product with a cyclic carboxylic acid anhydride to form a carboxylic acid-functional second intermediate product; and (c) reacting the second intermediate product with an epoxide-functional compound having one epoxide group to form the hyperbranched polyol. The coating composition may be cured to a coating layer having excellent flexibility.
Claims15
A coating composition, comprising a flexible hyperbranched polyol prepared by
- (a) reacting a polyol comprising at least three hydroxyl groups with an aliphatic dicarboxylic acid having from 6 to 36 carbon atoms or an esterifiable derivative of the aliphatic dicarboxylic acid to form a hydroxyl-functional first intermediate product;
- (b) reacting the first intermediate product with a cyclic carboxylic acid anhydride to form a carboxylic acid-functional second intermediate product;
- and
- (c) reacting the second intermediate product with an epoxide-functional compound having one epoxide group to form the hyperbranched polyol.
A method of making a flexible hyperbranched polyol, the method comprising:
- (a) reacting a polyol comprising at least three hydroxyl groups with an aliphatic dicarboxylic acid having from 6 to 36 carbon atoms or an esterifiable derivative of the aliphatic dicarboxylic acid to form a hydroxyl-functional first intermediate product;
- (b) reacting the first intermediate product with a cyclic carboxylic acid anhydride to form a carboxylic acid-functional second intermediate product;
- and
- (c) reacting the second intermediate product with an epoxide-functional compound having one epoxide group to form the hyperbranched polyol.
Dependencies are inferred from the claim text.