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CHDA HP
CHDA HP is a high-purity CHDA (1,4-cyclohexanedicarboxylic acid) powder used as a chemical intermediate for producing polyester resins with excellent thermal stability, lower resin color, and good humidity resistance.
Eastman CHDA HP is a cycloaliphatic diacid that offers many benefits to polyester resins used in industrial applications. The symmetrical, substituted cycloaliphatic ring structure in CHDA brings useful properties such as improved corrosion and chemical resistance, high thermal stability, low resin color, excellent weathering, and good hydrolytic stability. This leads to improved performance in a variety of waterborne, high-solids, powder, gel, and coil coating applications used in the automotive, transportation, equipment manufacturing, and aerospace industries. CHDA may also be used to create polyester resins for fiberglass reinforced plastics.
CHDA HP is approved in the United States and Europe for use in polyester resins for food contact coatings. It is a mixture of cis and trans isomers and is supplied as white to off-white powder in various package sizes.
Specifications
Appearance: White to off-white powder Viscosity at 25°C (cPs): 6.9 Flash point (°C, °F): 235, 455 Melting point (°C, °F): 164–167, 327–333 Specific gravity at 20°C/20°C: 1.38 Solubility in water at 20°C (wt%): 1 CAS: 1076-97-7 Molecular weight: 172.2 Empirical formula: C8H12O4
Features & Benefits
Rapid esterification Low resin color Great thermal stability Imparts excellent hardness and flexibility High solubility in molten glycols Improved corrosion and stain resistance Excellent hydrolytic stability Great gloss retention and prevents yellowing Reduced occurrence of orange peel in powder coatings
Problems Solved
Slow resin processing in molten glycol due to poor solubility Inferior weathering stability or inconsistent color in finished resin Inadequate coating hardness and flexibility balance
Applications
Automotive coatings Building materials Coil coatings Metal coatings Paints and coatings Protective coatings Specialty chemicals Pharmaceuticals
More than half of powder coating processes utilize a polyester resin in the binder system. Eastman™ provides high-quality polyester resin intermediates that deliver cost effective production and targeted surface finish performance. Browse their solutions portfolio and learn how and why to select their resin intermediate products.
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