Polymerizable compositions made with polymerization initiator systems based on organoborane amine complexes
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United States of America Patent
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Nov 25, 1997
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N/A
app pub date -
Mar 7, 1996
filing date -
Feb 22, 1995
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Abstract
A polymerizable acrylic composition comprises: (a) at least one acrylic monomer; (b) an effective amount of an organoborane amine complex having the structure: ##STR1## wherein: R.sup.1 is an alkyl group having 1 to 10 carbon atoms; R.sup.2 and R.sup.3 are independently selected from phenyl-containing groups and alkyl groups having 1 to 10 carbon atoms; R.sup.4 is selected from the group consisting of CH.sub.2 CH.sub.2 OH and (CH.sub.2).sub.x NH.sub.2 wherein x is an integer greater than 2; R.sup.5 is hydrogen or an alkyl group having 1 to 10 carbon atoms; and the nitrogen atom to boron atom ratio is about 1:1 to 1.5:1; and (c) an effective amount of an acid for initiating polymerization of the acrylic monomer. The polymerizable acrylic compositions are especially useful for bonding low surface energy substrates.
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