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Article: Polyester/TGIC powder coatings: based on 1,3-propanediol (PDO).
- Article from:
- Paint & Coatings Industry
- Article date:
- February 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Carboxyl functional polyesters have been prepared from 1,3-propanediol (PDO), neopentyl glycol (NPG), and a 76/24 terephthalic/isophthalic acid (TPA/IPA) combination. these polyesters were formulated with triglycidyl isocyanurate (TGIC) resins for evaluation as powder coatings. coatings based on polyesters with PDO provided superior impact resistance and flexibility over those that contained no PDO. overall, properties including hardness, adhesion, and chemical resistances are retained over a broad range of PDO concentrations. in addition, the viscosity of the polyester decreased as the level of PDO increased.
Synthesis of Carboxyl Functional Polyesters
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