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Sealants & Adhesives

Poly bd® and Krasol® resins are low molecular weight, hydroxyl-terminated homopolymers of butadiene. These hydroxyl-terminated polybutadiene (HTPB) resins are characterized by low volatiles content, low glass transition temperatures, excellent hydrophobicity and a high level of reactive functionality. The unique structure of the Poly bd® and Krasol® polyols provide properties which surpass typical polyether and polyester polyol based urethane systems, as well as conventional, general-purpose rubbers. Most grades of Poly bd® and Krasol® resins contain unsaturated double bonds that can be cured or crosslinked.

Some of the outstanding performance characteristics Poly bd® and Krasol® resins provide to polyurethanes include:

  • Adhesion to a variety of substrates
  • Hydrolytic stability
  • Resistance to strong aqueous acid and bases
  • Low temperature flexibility
  • Low moisture vapor transmission rates (MVTR)
  • Low embedment stress
  • Thermal cycling stability
  • Electrical insulation properties
  • High elongation with good elastic recovery

Poly bd® and Krasol® hydroxyl-terminated polybutadienes comply with title 21 (Food and Drugs) of the Code of Federal Regulations, paragraph 175.300, Resinous and Polymeric Coatings.