KALAR® 5281

Identification

Chemical Family

Butyl Rubber

GBU

EA

Blend

false

Single Ingredient

true

Categories

Markets → Automotive & Transportation → Applications → Automotive → Tires

Markets → Automotive & Transportation → Applications → Bonding & Assembly → Sealants

Markets → Building & Construction → Applications → Building Envelope & Roofing → Waterproofing & Weatherproofing

Markets → Building & Construction → Applications → Building Materials → Construction Adhesives

Markets → Building & Construction → Applications → Building Materials → Sealants & Caulks

Technologies → CASE → Product Families → Resins & Binders → Other Resins & Binders

Technologies → Elastomers → Product Families → Elastomer Additives → Performance Additives

Technologies → Elastomers → Product Families → Elastomer Additives → Processing Aids

Technologies → Elastomers → Product Families → Specialty Elastomers → Butyl Rubbers

Technologies → Plastics → Product Families → Polymer Additives → Processing Aids

Applications

Application Area

Roofs

Compatible Polymers & Resins

Ethylene Propylene Diene Monomer (EPDM),

Butyl Rubber (IIR)

Applications & Uses

Product Applications

KALAR® 5281 contains no monomeric materials that often impart an objectionable odor and potential instability under elevated temperature. Although widely used in the sealant industry, KALAR® 5281 is also ideal for a variety of other applications.

End Uses

Plastics & Elastomers End Uses

Tape,

Tires,

Tire Sealant ,

Roof Coatings ,

Caulks,

Industrial Sealant Tape

Features

CASE Ingredients Features

Excellent Creep Resistance,

Good Weather Fastness,

Cold-Flow Resistance

Materials Features

Creep Resistant,

Crosslinkable,

Ease of Handling,

Excellent Compatibility,

Good Green Strength

Features & Benefits

Product Features & Benefits

KALAR® 5281 contains no filler and its tenacity is due to the degree of cross-linking; not reinforcing fillers. This feature permits the compounder the widest formulating latitude. Other key performance benefits include:

• Elimination of butyl rubber pre-mastication
• Pellets may be metered to facilitate mixing
• Requires no vulcanization
• Readily acceptable in a wide range of solvents
• Extends with high levels of fillers and plasticizers
• Compatible with a wide choice of compounding ingredients
• Compounding economy

Functions

CASE Ingredients Functions

Binder & Resin

Plastics & Elastomers Functions

Impact Modifier,

Processing Aid

Identification & Functionality

Relative Degree of Cross-Link

Very High

Packaging & Availability

Packaging Type

Boxes

Regional Availability

• Asia Pacific
• Europe
• Global
• North America
• Latin America
• India/MiddleEast/Africa (IMEA)

Typical Packaging

KALAR® 5281 is packaged in 48 lb. fiber boxes.

Physical Properties

Physical Form

Pellets,

Solid

Appearance

Light amber to yellow rubber pellet

Properties

Density:

922.691 kg/m³

Specific Gravity:

0.92323

Typical Properties

	Value	Units	Test Method / Conditions
Base	Cross-linked Butyl / EVA	-	-
Density	7.7	lb/gal	ASTM D71
Glass Transition Temperature	-65	°C	-
Specific Gravity	0.92	-	ASTM D71
Viscosity (at 127°C)	70 - 83	MU	ASTM D1646

Appearance

Light amber to yellow rubber pellet

Storage & Handling

Handling

• The suggested handling procedure varies with the desired product.
• Coatings and adhesives are produced by adding the pellets to a solvent, mixing with a high-speed homogenizer-dispenser, and adding the rest of the ingredients.
• Caulks and sealants may be mixed in Sigma blade mixers.
• Stiff compounds may be mixed in a Banbury or on a two-roll rubber mill.

Storage Conditions

• KALAR® 5281 product may agglomerate or hard-pack within the boxes, however this will have no effect on chemical or physical properties and the product may be used.
• Store in a cool, dry environment.

Shelf Life

min. 1 year