Cookies
Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
ASTM D7252-22
Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
Přeložit název
NORMA vydána dne 1.7.2022
Informace o normě:
Označení normy: ASTM D7252-22
Datum vydání normy: 1.7.2022
Kód zboží: NS-1066992
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Suroviny pro pryž a plastické hmoty obecně
Zkušební podmínky a postupy všeobecně
Lehčené plastické hmoty
Anotace textu normy ASTM D7252-22 :
Keywords:
chromatography, diisocyanate, HPLC, isocyanate, isomers, monomer, polymeric MDI, polyurethane raw materials, pure MDI,, 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)
Doplňující informace
| Significance and Use | ||||||
|
5.1This test method is used for research or for quality control to characterize isocyanates used in polyurethane products. |
||||||
| 1. Scope | ||||||
|
1.1This 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.) 1.2UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3This 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.
1.4This 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. |
||||||
| 2. Referenced Documents | ||||||
|
Doporučujeme:
