CONTROLLED CURE ALIPHATIC LAMINATING ADHESIVE USING NON-MIGRATING BLOCKING AGENTS FOR ORGANOMETALLIC CATALYSTS
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United States of America Patent
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Issued Date -
Mar 28, 2013
app pub date -
Nov 7, 2012
filing date -
May 17, 2010
priority date (Note) -
Abandoned
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Abstract
A two component polyurethane adhesive composition having one or more polyols as a first component and one or more isocyanates as a second component. The composition also comprises a catalyst and a hydroxyalkyl-8-hydroxy quinoline blocking agent to delay the initial part of the curing reaction. The blocking agent links to the adhesive matrix during cure. The composition provides long open time, improved wet out of the substrates to be bonded, a rapid cure rate and bonding of the blocking agent to the cured adhesive matrix. The adhesive is useful to bond layers of a flexible food pouch sheet. Also a flexible food pouch made using the adhesive.
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