Energy savings plus mechanical reinforcement and rheology control

Knife-grade Hot Melt Polyisobutene Mastic – High Quality

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Polyisobutylenes (PIB)

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Polyisobutene can be used as either a base polymer or as a modifier in a variety of adhesive and sealant formulations. These resins have similar properties to natural rubber except that their aging properties are significantly better. In sealant formulations the PIB resin is often extended with inorganic fillers such as chalk, zinc oxide, china clay or barites. Bitumen may also be included in the formulation to provide for specific physical or applications properties and / or cost reduction purposes. The ease of melt mixing PIB resins makes them particularly valuable for hot melt sealants.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Isobutene polymer (Vistanex LM-MH, ExxonMobil)

xxx

Talc (Mistron Vapor, Imerys)

xxx

Carbon black

Typical Properties

Properties

Excellent ageing and adhesive properties

High-grade formula

Permanently flexible

Tacky

Easily workable

Knife-grade

Processing

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Resulting Properties

PIB resins are used in sealant formulations generally because of their resistance to aging and to attack by chemicals. Because of their good aging characteristics, moisture resistance, and low out-gassing tendency, polyisobutene hot melt sealants are used in building and construction applications. The formulation above is for a high quality, knife-grade PIB sealant.

(Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 432.)

Tips and Tricks

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