ASTM-D7252 2022

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D7252-22 Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates

Published By	Publication Date	Number of Pages
ASTM	2022

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Category: ASTM

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Description

ASTM D7252-22

Active Standard: Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates

ASTM D7252

Scope

1.1 This test method determines the percent by weight of monomeric isomers and total monomer in crude or modified isocyanates. The test method is applicable to methylene di(phenylisocyanate) (MDI) and polymeric (methylene phenylisocyanate) (PMDI). (See Note 1.)

1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Note 1: There is no known ISO equivalent to this standard.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

chromatography; diisocyanate; HPLC; isocyanate; isomers; monomer; polymeric MDI; polyurethane raw materials; pure MDI;

ICS Code

ICS Number Code 19.020 (Test conditions and procedures in general)

DOI: 10.1520/D7252-22

Additional information

Standard Title	D7252-22 Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
Published Code	ASTM
Publication Date	2022