The Universal Selection Source: Adhesives Ingredients

Formulation

Knife-grade Hot Melt Polyisobutene Mastic – High Quality

Applicable Type
Applicable Base Polymer
Applicable Industrial Sectors

Typical Formulation Ingredients

Phase
Ingredient
Parts by weight
Isobutene polymer (Vistanex LM-MH, ExxonMobil) 
   
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    Talc (Mistron Vapor, Imerys) 
       
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    Carbon black 
       
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    Typical Properties

    Properties
    Excellent ageing and adhesive properties 
       
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    High-grade formula 
       
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    Permanently flexible 
       
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    Tacky 
       
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    Easily workable 
       
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    Knife-grade 
       
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  • 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.

    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.)

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