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ASTM D7252-17
Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
5 стр.
Заменен
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Разработчик:
Зарубежные/ASTM
ICS:
19.020 Test conditions and procedures in general / Условия и методика испытаний в целом83.040.01 Raw materials for rubber and plastics in general / Сырье для производства резины и пластмасс в целом83.100 Cellular materials / Поропласты
Сборник (ASTM):
08.03 Plastics (III): D5117 – latest; Reinforced Plastic Piping Systems and Chemical Equipment; Plastic Building Products / Пластмасса (III): D5117 – и далее; Армированные пластиковые трубопроводные системы и химическое оборудование; Пластмассовые строительные изделия
Тематика:
Plastics
Описание
Значение и использование

5.1 This test method is used for research or for quality control to characterize isocyanates used in polyurethane products.

Область применения

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 and health 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.

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