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KALAR® Cross-Linked Butyl Rubber

Product Description
The KALAR products are partially cross-linked butyl rubber compounds. They are pellitized for easy handling. They feature the performance benefits of butyl rubber, the processing ease of pellets, and the ability to maintain their properties with a high level of fillers and plasticizers.  The KALAR products provide the base rubber or act as a performance additive for applications that require the properties of butyl rubber. These benefits include excellent chemical resistance, moisture & gas impermeability, good electrical properties and resistance to aging. They also impart excellent resistance to creep and flow. All the KALAR products consist of butyl rubber partially cross-linked to form a thermoplastic like rubber.

Typical Applications
The principal applications for KALAR cross-linked butyl are as sealants for commercial and industrial markets:

  • Industrial sealant tape
  • Architectural glazing tape
  • Automotive windshield tape
  • Automotive sealant and sound deadening compound
  • Tire sealant
  • Weather-proofing sealant tape

KALAR products impart the benefits of butyl rubber to many other applications. These applications incorporate KALAR products in concentrations that range from a few percent to the major part of the formulation:

  • Hot-melt glazing compounds
  • Solvent release coatings
  • Caulks
  • Construction adhesives
  • Roof coatings

The processing advantages make the KALAR products a convenient tool for compounders. They use KALAR products in small concentrations in conventional systems:

  • Processing aid for butyl rubber
  • Enhance green strength in butyl and EPDM compounds
Typical Properties
Partially Cross-Linked Polymers
Polymer Structure
Appearance
Color
Glass Transistion Temp., °C
Mooney Viscosity, ML 12+3@127°C
Filler
Shelf Life, Months
Relative Degree of Cross-Link
More
KALAR® 5215
poly(isobutylene-isoprene)
pellets
off-white
-70
47-57
non-abrasive
6
moderate
more
KALAR® 5246
poly(isobutylene-isoprene)
pellets
off-white
-70
30-40
non-abrasive
2
low
more
KALAR® 5263
poly(isobutylene-isoprene)
pellets
amber
-70
55-65
none
6
moderate
more
KALAR® 5275
poly(isobutylene-isoprene)
pellets
amber
-70
65-72
none
9
high
more
KALAR® 5277
poly(isobutylene-isoprene)
pellets
amber
-70
68-75
none
9
very high
more
KALAR® 5280
poly(isobutylene-isoprene)
pellets
amber
-70
80-90
none
9
very high
more
             

 

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