Compositions with improved adhesion to low surface energy substrates
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United States of America Patent
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Mar 2, 2010
Grant Date -
May 15, 2008
app pub date -
Nov 15, 2006
filing date -
Nov 15, 2006
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Expired
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Abstract
Acrylic-based pressure sensitive adhesives are modified with a telechelic hydrocarbon oligomer. The oligomer comprises a hydrocarbon polymer chain or backbone and a functional end group, e.g., an oligomer prepared from a mono hydroxyl polybutadiene polymer and toluene diisocyanate. The oligomer attaches to the acrylic backbone of the polymer as a pendant group and in a preferred embodiment, the oligomer is mixed with the PSA shortly before the PSA is coated.
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