Energy savings plus mechanical reinforcement and rheology control

Oil-based Polybutene Caulking Compound – Gun Grade

Adhesives Formulation

Applicable Type

Solvent borne Adhesives

Applicable Base Polymer

Synthetic Rubbers

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Isobutene rubber is an elastomeric polymer that is used in a wide variety of construction sealants. Because of its unique properties it also is used in the automotive and food processing industries among others. Sealants 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 (this formulation).

Typical Formulation Ingredients

Ingredient

Parts by weight

Blown soybean oil, Z-4 Garner-Holdt viscosity (Cargil, Inc.)

xxx

Isobutene polymer (Indopol H-1900, Amoco Chemicals Corp.)

Soya fatty acids

Atomite calcium carbonate

xxx

Thixotrope (Thixcin R, NL Industries, Inc.)

Cobalt naphthenate (6% cobalt)

Mineral spirits

xxx

(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 378.)

Typical Properties

Properties

Non-volatile content, %

xxxx

Pigment volume concentration, %

xxxx

Weight / gallon, lbs

xxxxx

Processing

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Resulting Properties

A typical isobutene sealing compound has the following composition as shown above. Isobutene sealants are known for excellent adhesion to most substrates and good water resistance. 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.

This formulation has the following characteristics:

Excellent gun consistency

Thixotropic stable viscosity

Good sag and slump control

Excellent pigment suspension

Excellent durability and water resistance

Good package stability and adhesion