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ASTM D4660-12

Заменен
Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate — 6 стр.
Значение и использование

These test methods can be used for research or for quality control to determine the isomer content of toluene diisocyanates.

The isomer content of a toluene diisocyanate relates to its reactivity.

Область применения

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 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 AApplicable to TDI samples containing 5 to 95 % of 2,6-TDI isomer (5 to 95 % 2,4-TDI isomer).

1.1.2 Test Method BApplicable to TDI samples containing 0 to 5 % of 2,6-TDI isomer (95 to 100 % 2,4-TDI isomer).

Note 1—These test methods are equivalent to ISO 15064.

1.2 The values stated in SI units are to be regarded as standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ICS
83.040.30 Auxiliary. Including fillers, extenders, hardeners, pigments, plasticizers, etc. / Вспомогательные материалы и добавки для пластмасс. Включая наполнители, разбавители, отвердители, пигменты, пластификаторы и т.д.
Сборник ASTM
08.02 Plastics (II): D3222–D5083 / Пластмасса (II): D3222–D5083
Тематика
Plastics