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Preparation of adhesive (CO) polymers from isocyanate chain extended narrow molecular weight distribution telechelic (CO) polymers made by pseudo living polymerization
Preparation of adhesive (CO) polymers from isocyanate chain extended narrow molecular weight distribution telechelic (CO) polymers made by pseudo living polymerization
Disclosed is a method for preparing adhesive polymers which commences with the formation of a poly-telechelic polymer of narrow molecular weight distribution (Mw/Mn) by polymerizing one or more radically-polymerizable monomers in the presence of a transition metal, a ligand, and an initiator, under atom or group transfer radical polymerization conditions. In this polymerization step, OH groups are contained on one or more of said initiator, an initiating monomer, a polymerizable monomer, a terminating monomer, or combinations thereof. The poly-telechelic polymer, then, is chain extended with a polyisocyanate to form the adhesive polymer.
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