Alkenyl-containing isobutylene group block copolymer and process for producing it
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United States of America Patent
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Feb 19, 2002
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N/A
app pub date -
Feb 20, 2001
filing date -
Dec 4, 1997
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Abstract
The present invention has its object to provide an isobutylene group block copolymer containing a highly reactive alkenyl group with a high rate of introduction of an alkenyl, and process for producing the same. An alkenyl-group-containing isobutylene group block copolymer comprising a polymer block derived from (a) a monomer component containing isobutylene group as a predominant monomer and (b) a monomer component not containing isobutylene group as a predominant monomer, in which said block copolymer has an alkenyl group of the following general formula (1). ##STR1##
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