Table 2 DIs derivatization product obtained with benzylamine and dibutylamine.

From: A novel treatment and derivatization for quantification of residual aromatic diisocyanates in polyamide resins

Entry

Sample name

Chemical structure

1

MDI/BA-1

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1,1′-[methylenebis(4,1-phenylene)]bis(3-benzylurea)

2

TDI/BA-2

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a. 1,1′-(2-methyl-1,3-phenylene)bis(3-benzylurea)

b. 1,1′-(2-methyl-1,5-phenylene)bis(3-benzylurea)

3

MDI/DBA-3

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N'N''-[methylenebis(4,1-phenylene)]bis(N,N-dibutylurea)

4

TDI/DBA-4

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a. N'N''-(2-methyl-1,3- phenylene)bis(N,N-dibutylurea)

b. N'N''-(2-methyl-1,5-phenylene)bis(N,N-dibutylurea)