Resins, low temperature formulations, and coatings derived therefrom
First Claim
Patent Images
1. A carboxyl or hydroxyl functional polyester coating resin comprising:
- the reaction product ofA. a dianhydrohexitol;
B. a fatty dimer diol having aliphatic side chains;
C. a cyclic diacid, cyclic diester, or cyclic diacid chloride that contributes rigidifying effects; and
D. a catalyst;
wherein the carboxyl or hydroxyl functional coating resin has a Tg between about 40°
C. and 80°
C.
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Abstract
A series of resins were synthesized using a range of bio-based materials to control the molecular architecture, and therefore the properties, of the inventive resins. The utility of these resins was demonstrated in the formulation of powder coatings, such as β-hydroxy amide crosslinked and hybrid types. Generally, the bio-based resins flowed out on heating faster than conventional petrochemically-based resins, allowing the use of lower temperatures in the curing oven than is typically possible and a more active catalyst system, especially in the carboxylic acid-epoxy crosslinked hybrid coatings formulations.
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Citations
9 Claims
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1. A carboxyl or hydroxyl functional polyester coating resin comprising:
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the reaction product of A. a dianhydrohexitol; B. a fatty dimer diol having aliphatic side chains; C. a cyclic diacid, cyclic diester, or cyclic diacid chloride that contributes rigidifying effects; and D. a catalyst; wherein the carboxyl or hydroxyl functional coating resin has a Tg between about 40°
C. and 80°
C. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for making a hydroxyl functional polyester coating resin comprising:
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a. selecting a tough, crystalline bio-based monomer of a dianhydrohexitol; b. co-reacting with a fatty dimer diol having aliphatic side chains; and
a cyclic diacid, cyclic diester, or cyclic diacid chloride that contributes rigidifying effects;
to form resins comprising;a Tg of greater than about 40°
C. and less than about 80°
C. - View Dependent Claims (8, 9)
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Specification