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
