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Ensinger PEI
Covestro Bayhydrol® A 2058 Polyurethane Coating
Categories: Polymer; Thermoplastic; Adhesives, Sealants, and Coatings; Thermoset; Polyurethane, TS

Material Notes: Bayhydrol A 2058 is an aqueous hydroxyfunctional polyacrylic dispersion. In the formulation of flexible two-component polyurethane top coats and primers for plastics.

Properties / Applications: Bayhydrol A 2058 is a hydrolysis-resistant polyacrylic dispersion neutralised with dimethyl ethanol amine. The product can be thinned with water to application viscosity. Bayhydrol A 2058 combined with Bayhydur 302 yields high-gloss flexible top coats which are resistant to solvents. The formulation can be applied as a one-coat system on many substrates and has good adhesion and body. Water-borne base coats formulated with, e.g. Bayhydrol UH 2952/1, can be overcoated with clear coats based on Bayhydrol A 2058. Two-pack primers can be formulated by combining Bayhydrol A 2058 with Bayhydur 302. These are highly suitable for use on thermoplastics and thermosets and are characterised by excellent adhesion, sandability and water resistance. Bayhydrol A 2058 has good pigment wetting properties and high shear stability. Sand and bead mills have proved suitable as grinding equipment. Pigments and extenders are added to a small amount of the total Bayhydrol content in the formulation. Deionised water is added to adjust the mixture to dispersion viscosity. Because of the good shear stability of the product, dispersion temperatures of up to 40°C have no negative effect. Depending on the co-reactants used, coatings formulated with Bayhydrol A 2058 can be dried for 45 min at 80°C. The pot life of systems applied under standard conditions (23°C, 60 ± 5% relative humidity) is approximately 1 hour. As with any product, use of Bayhydrol A 2058 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.

Information provided by Covestro

Available Properties
  • Specific Gravity
  • Volatiles, 1g/1h/125 °C/convection oven
  • pH, 1:3 in demineralized water
  • Viscosity, D=82s-1
  • Acid Value, [mg KOH/g]
  • Flash Point
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Manufacturer Notes:
Covestro Deutschland AG, Bayer MaterialScience

Category Notes

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