ASTM D(). Standard Test Method for Isocyanate Groups in Urethane Materials or Prepolymers. standard by ASTM International. Find the most up-to-date version of ASTM D at Engineering ASTM D – 97(). Standard Test Method for Isocyanate Groups in Urethane Materials or Prepolymers. This standard is a part of ASTM Book of Standards.
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This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. ACC is investing in research to improve understanding of how chemicals impact health and the environment. This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions. No further reproductions authorized.
Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. Criteria for building, evaluating and validating the NIR calibration model are also described. Both methods are based on the quantitative measurement of absorption bands arising from out-of-plane C-H deformation vibrations of the aromatic ring at cm- superscript: Please login to your authorized f2572 account to use this feature.
Definitions, terms, and calibration techniques are described. There is no equivalent ISO standard. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future.
Search book title Enter keywords for book title search. Polyurethane Raw Materials Test Methods. Standard Practice for Polyurethane Raw Materials: An alternative method is Test Method D You currently cannot view this content. Register for a trial account.
This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. Test Method A also applies to more viscous samples that are soluble in -butyl acetate. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six. It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms. No items in cart. The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications.
Two test methods are required to give accurate results over a broad range of isomer concentrations. Criteria for building, evaluating, and validating the NIR calibration model are also described.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. Jobs The business of chemistry providesskilled, good-paying American jobs.
This test method may also awtm useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability.
Enter your personal d22572 email address to request a password reset: Print 1 2 3 4 5 page sstarting from page current page. Content only available by subscription. The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid.
They apply only to materials whose colors have light-absorption characteristics similar to those of the standards.
ASTM D2572 – 97(2010)
Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations. Please sign into an account with a subscription to this content, or email e2572 help at support madcad. This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols.
Definitions and calibration techniques are given.