ASTM D4660-12
Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate

Standard No.

ASTM D4660-12

Release Date

2012

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4660-18

Latest

ASTM D4660-23

Scope

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.

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 A8212;Applicable to TDI samples containing 5 to 95 % of 2,6-TDI isomer (5 to 95 % 2,4-TDI isomer).

1.1.2 Test Method B8212;Applicable to TDI samples containing 0 to 5 % of 2,6-TDI isomer (95 to 100 % 2,4-TDI isomer).

Note 18212;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.

ASTM D4660-12 Referenced Document

• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E180 Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
• ISO 15064 Plastics - Aromatic isocyanates for use in the production of polyurethanes - Determination of the isomer ratio in toluenediisocyanate (TDI)

ASTM D4660-12 history

• 2023 ASTM D4660-23 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
• 2018 ASTM D4660-18 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
• 2012 ASTM D4660-12 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
• 2006 ASTM D4660-06 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
• 2000 ASTM D4660-00(2006)e1 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
• 2000 ASTM D4660-00 Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate