Phenoxy PKHB

Gabriel Phenoxy PK™HB has a low viscosity compared to most phenoxy resins. Phenoxy resins (polyhydroxyethers) are tough, ductile, amorphous, thermoplastic polymers having excellent thermal stability, adhesive strength, and vapor barrier properties. Phenoxy resins may be crosslinked by reacting its hydroxyl functional groups with isocyanates, melamine resins, or phenolic resins. Crosslinked phenoxy resins exhibit excellent chemical resistance, hardness, and adhesion on many substrates including steel, aluminum, glass, and carbon fibers, and plastics such as nylon and polyester (PET). Phenoxy PKHB may also be formulated in single-pack epoxies containing latent hardeners, such as dicyandiamide, providing improved toughness and adhesive strength on substrates when properly cured. Phenoxy PKHB is soluble in many polar, aprotic solvents such as MEK, cyclohexanone, and glycol ethers.

TYPICAL APPLICATIONS

• Thermoset Coatings
• Single Pack Epoxy Coatings
• Inks and Paints
• Adhesives/Sealants
• Composites
• Electronics

TYPICAL PROPERTIES 

Solids, %......................................................................................................................98

Viscosity, cP Brookfield, @ 25 °C; (20% solution in cyclohexanone) .............180 – 280

Molecular Weight (Weight Average, Daltons) ................................................... 32,000

OH Equivalent Weight (g/equiv.)............................................................................. 277

Color (APHA); (20% solution in cyclohexanone, max.) ...........................................200

Haze, %; (20% solution in cyclohexanone, max.) .................................................... 15