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01/07/2022 |
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Détails
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.
Significance and Use:
5.1 This test method is used for research or for quality control to characterize isocyanates used in polyurethane products.
Informations supplémentaires
| Auteur | American Society for Testing and Materials (ASTM International) |
|---|---|
| Comité | D20.22 - Committee D20 on Plastics |
| Edité par | ASTM |
| Type de document | Norme |
| Thème | ,Test conditions and procedures in general,Raw materials for rubber and plastics in general,Cellular materials |
| ICS | 19.020 : Procédures et conditions d'essai en général
83.040.01 : Matières premières pour les élastomères et les plastiques en général 83.100 : Matériaux alvéolaires |
| Nombre de pages | 6 |
| Remplace | ASTM D7252-17 + Redline |
| Recueil | ASTM Volume 08.03 - Multi-User - Single-Site Online |
| Mot-clé | D7252 |
