Pressure sensitive adhesive laminate
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United States of America Patent
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-
Mar 14, 2000
Issued Date -
N/A
app pub date -
Jul 24, 1995
filing date -
May 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to improved polymer-pressure sensitive adhesive combinations, particularly in the form of laminates, and methods of producing same. This invention improves the bond strength of the pressure sensitive adhesive to the polymer layer by priming the polymer surface with a curable urethane primer before applying the pressure sensitive adhesive to the polymer surface. If the polymer surface is not 'active' to the curable urethane primer, the polymer surface is first activated with a silicon-containing treating agent. The laminates of this invention have superior bond strength, especially longterm bond strength. Of particular interest are the embodiments of this invention wherein the polymer is a silicone foam and the pressure sensitive adhesive is either acrylic or silicone adhesive.
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