ASTM D7252-06
Historical Standard: ASTM D7252-06 Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
SUPERSEDED (see Active link, below)
ASTM D7252
1. 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-bis-(4-phenylisocyanate) (MDI) and polymethylene polyphenylisocyanates (PMDI). (See Note 1.)
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.
Note 1There is no known ISO equivalent to this standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D883 Terminology Relating to Plastics
E682 Practice for Liquid Chromatography Terms and Relationships
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
chromatography; diisocyanate; HPLC; isocyanate; isomers; monomer; polymeric MDI; polyurethane raw materials; pure MDI: Isocyanates; Isomers; Monomers; Polyurethane raw materials;
ICS Code
ICS Number Code 19.020 (Test conditions and procedures in general); 83.040.01 (Raw materials for rubber and plastics in general); 83.100 (Cellular materials)
DOI: 10.1520/D7252-06
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