| 摘要 |
A process is provided for the production of a polymer of reduced molecular weight by subjecting, in bulk form, a halogenated butyl polymer having at least 75 percent of the unsaturation in the EXO methylene configuration to mastication in an extruder while exposing the masticated polymer to an atmosphere containing ozone. Such reduced molecular weight polymers have an Mn of from about 10,000 to about 40,000 and may be used in caulks and sealants. |
