polybutene การใช้
- Hydrogenated polybutenes are used in a wide variety of tackiness.
- Some polymers are also sensitive to attack, including acetal resin and polybutene.
- Polybutene is an oligomeric oil used to make putty.
- It should not be confused with polybutene, a low molecular weight oligomer.
- Polybutene is another copolymer, containing roughly 80 % isobutylene and 20 % other butenes ( usually 1-butene ).
- Butene can be used as the monomer for polybutene but this polymer is more expensive than alternatives with shorter carbon chains such as polypropylene.
- Polybutene is therefore commonly used as a co-polymer ( mixed with another polymer, either during or after reaction ), such as in hot-melt adhesives.
- For electrical lubricants and carriers which might be subject to overheating or fires, polybutene does not result in increased insulation ( accelerating the overheating ) or conductive carbon deposits.
- An important physical property is that higher molecular weight grades thermally degrade to lower-molecular weight polybutenes; those evaporate as well as degrade to butene monomers which can also evaporate.
- Industrial product applications include, sealants, adhesives, extenders for putties used for sealing roofs and windows, coatings, polymer modification, tackified polyethylene films, personal care, polybutene emulsions.
- This is sometimes addressed by coating aluminium conductors with an antioxidant paste ( containing zinc dust in a low-residue polybutene base ) at joints, or by applying a mechanical termination designed to break through the oxide layer during installation.
- The reaction is an acid catalyzed carbocationic polymerization typically using aluminum chloride or hydrogen halide acid such as HF . So called " high reactivity " polybutene or PIB is produced using purified isobutylene feedstock and strong acid catalyst such as HF or HF with promoter.