Star polymer
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United States of America Patent
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Mar 25, 2014
Grant Date -
May 24, 2012
app pub date -
Aug 4, 2010
filing date -
Aug 4, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
It is an object of the present invention to provide a copolymer for a cured product that is satisfactory in properties, such as adhesion properties, as a chip stacking adhesive or the like. The present invention is a star polymer comprising, as an arm portion, a polymer chain containing repeating units represented by formula (I) and formula (II), and comprising a core portion derived from a monomer represented by formula (III), wherein a molar ratio of the repeating unit represented by formula (I) to the repeating unit represented by formula (II) ((I)/(II)) in the arm portion is in the range of 60/40 to 95/5.
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