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Home>ASTM D4660-18 + Redline

ASTM D4660-18 + Redline

ASTM D4660-18 + Redline

Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate

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1.1 ,These test methods measure the amount of toluene-2,6-diisocyanate (2,6-TDI) isomer or toluene–,2,4–,diisocyanate (2,4-TDI) isomer in mixtures of the 2,4- and 2,6-isomers of toluenediisocyanate (TDI). Two different test methods are provided to give accurate results over the broad range of isomer concentrations possible.

1.1.1 ,Test Method A—,Applicable to TDI samples containing 5 to 95 ,% of 2,6-TDI isomer (5 to 95 ,% 2,4-TDI isomer).

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