PRICES include / exclude VAT
Homepage>ASTM Standards>19>19.020>ASTM D7252-22 - Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
Released: 01.07.2022

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

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

Format
Availability
Price and currency
English PDF Redline
Immediate download
68.48 USD
English PDF
Immediate download
57.78 USD
English Hardcopy
In stock
57.78 USD
Standard number:D7252-22
Released:01.07.2022
Status:Active
Pages:6
Section:08.03
Keywords:chromatography; diisocyanate; HPLC; isocyanate; isomers; monomer; polymeric MDI; polyurethane raw materials; pure MDI;
DESCRIPTION

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.