ABSTRACT
Isobutylene-based elastomers include butyl rubber, halogenated butyl rubbers, starbranched versions of these polymers, and the terpolymer brominated isobutyleneco-para-methylstyrene (BIMSM). A number of recent reviews on the manufacture,
I. Introduction .................................................................................................. 109 II. Synthesis and Manufacture ........................................................................... 110
A. Butyl Rubber ........................................................................................... 110 B. Halobutyl Rubbers................................................................................... 111 C. Star-Branched Butyl Rubber ................................................................... 113 D. Brominated Isobutylene-co-para-Methylstyrene.................................... 113
III. Structure ....................................................................................................... 114 A. Polyisobutylene ....................................................................................... 114 B. Butyl Rubber ........................................................................................... 114 C. Halogenated Butyl Rubber ...................................................................... 114 D. Star-Branched Butyl Rubber ................................................................... 115 E. Brominated Isobutylene-co-para-Methylstyrene.................................... 116
IV. Physical Properties ....................................................................................... 116 A. Permeability ............................................................................................ 116 B. Dynamic Damping .................................................................................. 118
V. Chemical Properties ..................................................................................... 118 A. Solubility ................................................................................................. 118 B. Stability ................................................................................................... 119 C. Vulcanization .......................................................................................... 119
VI. Applications .................................................................................................. 120 A. Tire Innerliner ......................................................................................... 121 B. Tire Black Sidewall ................................................................................. 125 C. Tire White Sidewall and Cover Strip ...................................................... 126 D. Tire Treads .............................................................................................. 126 E. Tire Curing Bladders and Envelopes ...................................................... 128 F. Automotive Hoses ................................................................................... 129 G. Dynamic Parts ......................................................................................... 130 H. Pharmaceuticals ...................................................................................... 130
References .............................................................................................................. 134
physical and chemical properties, and applications of isobutylene-based elastomers are available [1-7].
