Energy savings plus mechanical reinforcement and rheology control

Hot Melt Butyl Sealant for Insulating Glass

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Butyl Rubbers (IIR)

Applicable Industrial Sectors

Automotive , Buildings & constructions , Industrial Assembly , Transportation (excl. Automotive)

Applicable Base Polymer Properties

Butyl rubber is an elastomeric polymer that is used in a wide variety of construction adhesives and sealants. Because of its unique properties it also is used in the automotive and food processing industries among others. Butyl adhesives can be applied in a number of different forms. It is used widely as a hot melt, solvent solution, preformed tape or gasket, and as a gun-dispensable sealant. Butyl rubber can be used as a primary base resin or as an additive for tack and other desired properties.

Typical Formulation Ingredients

Ingredient

Parts by weight

Exxon butyl 065

xxx

Afax 500 HLO

Black pigment, PZ 700 black 35

xxx

Calofort S

xxx

Elvax 210 ethylene vinyl acetate

Stabilite ester 10

xxx

Hyvis 2000

Silane A1120

Typical Properties

Properties

Viscosity, cp

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Ball and ring softening temperature, °C

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Appearance

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Gassing at 180°C

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Shear adhesion, psi

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Processing

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Resulting Properties

The cohesive strength of butyl sealants can be improved by the incorporation of fillers and other additives. The formulation above is for a hot melt applied butyl sealant. It is commonly used as a sealant for insulating glass windows due to its extremely low moisture vapor transmission. Other uses include automotive weather stripping and automotive taillight lens sealing. They offer low viscosity, anti-sag characteristics, reasonable cost, and easy gunnability at low temperatures. Butyl sealants also exhibit excellent adhesion to both glass and metal substrates. The starting formulation in the table above is for a hot melt butyl insulating glass sealant that can be used for the primary seal of a dual sealed insulated glass unit.

Tips and Tricks

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