Method for Making Waterborne Polyurethane with a Reactive Functional Group and a Nanocomposite Made of the Same
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United States of America Patent
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Issued Date -
May 23, 2013
app pub date -
Mar 14, 2012
filing date -
Nov 17, 2011
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Abandoned
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Abstract
Disclosed is a method for making waterborne polyurethane with a reactive functional group. The method includes the step of introducing a short-chain diol monomer with a reactive functional group into waterborne polyurethane polymer by pre-polymerization to provide a polyurethane pre-polymer with the reactive functional group connected to a side chain and the step of reacting the pre-polymer with hydrophilic diamine for chain extension and inter-crosslink to provide waterborne polyurethane with different crosslink degree. The short-chain diol monomer is expressed by structural formula (I) and the polyurethane pre-polymer with the reactive functional group connected to the side chain is expressed by structural formula (II) as follows:
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