PIB is an ideal additive for industrial adhesives due to its tackiness and water resistance. As well as improving the tack and peel strength of elastomer it also has other unique properties. KEMAT provides the largest range of viscosities combining the Polybut™ and Polybol™ Polybutenes including very narrow MW distribution for special applications. The combination of Polybut™ and Polybol™ can fine tune your adhesive. The higher the viscosity and molecular weight, the stronger the tackiness of the product.

  • PolybutTM(Low MW PIB) = medium cohesion, good adhesion, good wetting
  • PolybolTM(Medium and High MW PIB) = good cohesion, medium adhesion

Properties

  • low moisture
  • low gas permeability
  • odourless
  • permanent tackiness
  • increase water resistance
  • improve adhesion and ageing
  • influence quick stick, cohesive strength and peel strength
  • reduce use of solvents which provides environmental benefits

End User Applications

Pressure Sensitive Adhesives (PSA)

There are two routine ways to acquire desired PSA properties using PIB:

  • 1) an amalgamation of low- and high-molecular weight PIBs is used to obtain a balance of tack and cohesive strength. These adhesives can be easily manufactured by solution or dry blending, a particular ratio of low- to high-molecular weight PIB is needed for pressure sensitive adhesion.  Generally this is about 80 wt % or less of low-molecular weight PIB. This chemistry yields PSAs with fairly mild adhesive characteristics.
  • 2) medium- and high-molecular weight PIBs are combined with a low-molecular weight polybutene (PB). When PB is added to the PIB blend, the formulation range increases.  Higher ratios of low- to high-molecular weight PIB can be used.  The formulation then becomes a compromise between materials with low shear strength to highly tacky material (high quantity of PB).

KEMAT Polybut™ (low molecular weight convention polybutenes) and Polybol™ (medium and high molecular weight polyisobutenes) are ideal for PSA applications.

PIB partially replaces tackifiers, so it is economical. Additionally, it improves the tack and peel strength of elastomer.

PSAs are formulated to stick on nearly any surface by simple contact under light pressure.  PSAs have three main types of performance:

  • removable = ultra-removable
  • permanent = ultra-high adhesion
  • repositionability = in between

Properties

  • soft, viscoelastic solids
  • good tack
  • improved adhesion
  • safe to use
  • easy to handle

End User Applications

  • mailing labels
  • foil tapes
  • postage stamps
  • automotive bonding
  • adhesive films
  • fibre laminates
  • industrial tapes
  • masking and friction tapes
  • paper
  • paper laminates
  • safe for use in skin applications

Hot Melt Adhesives (HMA)

Hot melt adhesives are mainly 100% solids formulations based on thermoplastic polymers.  At room temperature they are solid.  When heated above their softening point, they are activated and become liquid, then they can be used.  After application they will become solid with structural integrity.  Polybutenes are fairly compatible with Ethylene Vinyl Acetate (EVA), Styrene-Butadiene-Styrene (SBS), Styrene-Isoprene-Styrene (SIS), Polyethylene (PE).

KEMAT has the largest range of viscosities combining Polybut™ (low molecular weight conventional polybutenes) and Polybol™ (medium and high molecular weight polyisobutenes).

Properties

  • optimal hold
  • superior manufacturing flexibility
  • lower processing costs
  • good adhesion and tack
  • increases the melt index
  • maintains flexibility at low temperatures

End User Applications

  • case and carton sealing
  • general packaging
  • greenhouse covers
  • book binding spine gluing
  • plastic labelling
  • glue guns
  • packing
  • binding
  • sanitary products, eg diapers

Hot Melt Pressure Sensitive Adhesives (HMPSA)

Polybutene is used as a liquid plasticiser and tackifier performance modifier in HMPSA formulations.  The tackiness of polybutene increases as the molecular weight increases.

Polybut™ (low molecular weight conventional polybutenes) and Polybol™  (medium and high molecular weight polyisobutenes) are used in the production of HMPSA.

Hot melt pressure sensitive adhesives are solid at room temperature and melt easily to provide free-flowing liquids which are applied to the bonding site.  Once cooled, hot melts rapidly solidify to form strong bonds between two substrates.

Fastening tapes are widely used in many products in daily use, for example: clothing, furnishings, footwear, etc.  These fastening tapes can easily be sewn, however if fastening tapes are needed to be applied to concrete, glass, metal, wood, etc, then an adhesive is required.

Properties

  • colourless
  • viscous
  • resistant to oxidation and hydrophobic
  • superior tack and peel
  • chemically stable
  • non-drying
  • does not form residue when thermally decomposed
  • increases tack

End User Applications

  • aircraft interiors
  • automotive assembly
  • book binding
  • paper labels
  • footwear