甲苯二异氰酸酯中同分异构体含量的测定

1、mber immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 These test methods measure the amount of toluene-2,6-diisocyanate (2,6-TDI) isomer or toluene2,4diisocyanate(2,4-TDI) isomer in mixtures of the 2,4- and 2,6-isomers oftoluenediisocyanate。

2、d designation D7252; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEReapproved with editorial changes in September 2011.1. Scope1.1 This test method determines the percent by weight of monomeric isomers and total monomer in crude or m。

3、mber immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 These test methods measure the amount of toluene-2,6-diisocyanate (2,6-TDI) isomer or toluene2,4diisocyanate(2,4-TDI) isomer in mixtures of the 2,4- and 2,6-isomers oftoluenediisocyanate。

4、number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 These test methods measure the amount of toluene-2,6-diisocyanate (TDI) or toluene2,4diisocyanate in mixtures ofthe 2,4- and 2,6-isomers. Two test methods are required to giveaccurate resul。