Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Isobutylene-isoprene copolymer (Butyl 301, Lanxess)
A
Tackifier (Eastotac H-130E resin, Eastman)
A
Calcium carbonate (Omyacarb 3, Omya)
A
Polybutene (Indopol H-1900, Lipo Chemicals)
A
Antioxidant (Irganox 1010, Ciba-Geigy)
A
Amorphous polypropylene (Eastoflex P1023, Eastman)
Typical Properties
Failure mode in peel when bonded to aluminum
Resulting Properties
Hot Melt Butyl Amorphous Polypropylene Adhesive has the composition as shown above. Butyl sealants are known for excellent adhesion to most substrates. However, they can stain adjacent surfaces and have relatively poor recovery from extension. The polymeric compositions along with the other additives will affect both the application and the ultimate performance properties of the joint.
Typically butyl sealants with this formulation have the following characteristics:
- Conformance to Federal Specification TT-S-001657
- Good tack free time
- Excellent adhesion to many common substrates
- Excellent weathering
- Low permeability to moisture and gases
The source of formulation is Eastman Chemical Company.