Hot Melt Butyl Adhesives by Eastman Chemical Company

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

A

Isobutylene-isoprene copolymer (Butyl 301, Lanxess)

xx

A

Tackifier (Eastotac H-130E resin, Eastman)

xx

A

Calcium carbonate (Omyacarb 3, Omya)

xxxx

A

Polybutene (Indopol H-1900, Lipo Chemicals)

xx

A

Antioxidant (Irganox 1010, Ciba-Geigy)

xxx

Typical Properties

Properties

Needle penetration, dm/m

xx

180° Peel strength, pli

xx

Failure mode in peel when bonded to aluminum

xxxxxxxx

Processing

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Resulting Properties

Hot Melt Butyl 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.

Tips and Tricks

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