Kalar 5263 Cross Linked Butyl Rubber Elementis Rubber - Elastomer >> Butyl rubber, IIR SEALANT ADHESIVE >> Hot-melt ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) ADHESIVE >> Solvent based PRODUCT DESCRIPTION KALAR 5263 is a partially cross-linked butyl rubber compound pelletized for easy handling. KALAR features all the performance attributes expected of butyl rubber. KALAR 5263 is amber in color, and is a more tightly crosslinked butyl rubber than KALAR 5215. It is designed as the starting point product for butyl sealants that require higher modulus and/or superior durability at elevated temperatures. 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. Creep and cold-flow resistance. Compounding economy. APPLICATION KALAR 5263 contains no monomeric materials that often impart an objectionable odor and potential instability under elevated temperature. Although widely used in the sealant industry, KALAR is also ideal for a variety of applications including the following: Industrial sealant tape Architectural glazing tape Automotive windshield tape Automotive sealant and sound deadening compound Tire sealant High-strength thermoplastic mastic Weather-proofing sealant tape Hot-melt glazing compounds Solvent release adhesives Caulks Construction adhesives Processing aid for butyl rubber Green strength enhancer in butyl and EPDM compounds STORAGE AND HANDLING KALAR 5263 is packaged in 50 lb. fiber boxes. The pellets may agglomerate over time. The agglomeration accelerates with ambient heat. Store in a cool, dry environment to prevent damage to the boxes and to minimize agglomeration. The shelf life varies by product. The polymer maintains its properties, but the pellets clump. Minor effort breaks up the agglomerations. KALAR 5263 is the most sensitive to agglomeration. 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. Starting point rubber for butyl sealants that require higher modulus and/or superior durability at elevated temperatures. Eliminates pre-mastication and requires no vulcanization. Extends with high levels of fillers and plasticizers. High compatibility with compounding ingredients. Has creep and cold-flow resistance.