Polar-group-containing cyclized rubber and process for producing same
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United States of America Patent
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Oct 9, 2007
Grant Date -
Mar 23, 2006
app pub date -
Jan 20, 2004
filing date -
Jan 23, 2003
priority date (Note) -
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Abstract
A main object of the invention is to provide a polar-group-containing cyclized rubber making it possible to improve remarkable the adhesiveness between paint and a molded product made of a nonpolar polymer such as polypropylene or polyethylene, and a process for producing the same. In order to attain the object, the invention provides a polar-group-containing cyclized rubber which has a polar group at a terminal of a polymer chain thereof, has a weight-average molecular weight of 1000 to 1,000,000, and is obtained by cyclizing a conjugated diene polymer having the polar group at a terminal of a polymer chain thereof.
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