Indopol L-2 Polybutene BP Chemicals Plasticizers >> Polyisobutylene (PIB) ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) ADHESIVE >> Hot-melt SEALANT Indopol polybutenes are synthetic hydrocarbon polymers made by polymerization of C4 olefins (primarily isobutene), and are available in a wide range of viscosities. All Indopol grades are colourless, practically non-toxic, and exhibit little or no odour. They are non-drying and do not leave residues when volatilized or thermally decomposed. They are hydrophobic, can easily be emulsified, and are resistant to oxidation by light and moderate heat. The higher viscosity grades are also tacky. Adhesives Indopol polybutenes are vital ingredients in many pressure-sensitive adhesives (PSAs) and hot-melt adhesives (HMAs). They are very useful for modifying properties such as the tack, softness, bond strength, cohesive strength and water resistance of adhesives. The advantages offered by polybutenes when compared to mineral oils include: low colour and excellent colour stability, good resistance to oxidation, practically no toxicity, and a wide range of viscosities. . Examples of pressure-sensitive adhesives which can be improved with polybutene include: adhesives for paper laminates, labels and tapes; masking and friction tapes; surgical tapes; colourless adhesives; cements for leather; paper, foil and fiber lamination; and industrial tapes. Polybutene improves the quick stick and peel strength of elastomers and improves the tack of natural and synthetic rubbers. Polybutene emulsions decrease the organic vapour emissions in water-based PSAs. These emulsions also offer enhanced adhesion and temperature stability and can lower adhesive costs for packaging, labels, and product assembly. When incorporated into hot-melt adhesives, polybutene acts as a polymer extender, plasticizer, tackifier and wetting agent. Polybutene decreases the melt index and increases the cold temperature flexibility. The major applications for these HMAs include packaging, disposable soft goods, book binding, carton sealing, carpet, shoes, and furniture. Polybutene improves the tack and adhesion of the tie layer in multi-layer food packaging applications, and can reduce formulation costs. Food packaging applications of hot-melt extrudable adhesives include cups, trays, plates, bags, and lid films Sealants and Putties Indopol polybutenes plasticize and add tack to elastomer-based sealants. Incorporation of polybutene results in a softer, more easily extruded sealant. Such sealants can be applied from an application gun without using large proportions of solvents, or extruded into tape form supported on removable backing paper. The reduction in solvent content of the sealants minimizes the shrinkage of the product after application. Indopol polybutenes are widely used as partial replacements for drying oils in sealant and putty formulations. Their incorporation can give permanence, improved adhesion and cohesion and ageing, less shrinkage and lower oil-to-filler ratios. Combinations of butyl rubber and Indopol H-6000/H-18000 are used in sealants for double glazed window systems, and other applications where low moisture vapour transmission is important. They are suitable for use as both primary and secondary sealants in typical window glazing units. Sealants based on thermoplastic elastomers are another area where Indopol polybutene can offer advantages. For instance butadiene-ethylene-styrene triblock copolymers or ethylene-propylene terpolymers can be plasticized with polybutene. In high performance silicone sealants low molecular weight polybutenes such as Indopol L-8 can be employed as a partial replacement/extender for silicone oil, which can result in cost savings without detracting from the properties of the sealant. Clear sealants based on polybutene have outstanding peel adhesion and good ageing characteristics, and are also more translucent than commercial silicone, acrylic or thermoplastic elastomer sealants Synthetic hydrocarbon polymer. Colourless, non drying, hydrophobic and resistant to oxidation by light and heat. Modifies properties such as tack, softness, bond strength, cohesive strength and water resistance in adhesives. Plasticizes and adds tack to elastomer-based sealants.