ASTM D2572 PDF
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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Search book title Enter keywords for book title search. The electronic file may not be reproduced in any way. Jobs The business of chemistry providesskilled, good-paying American jobs. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of astk to Register for a trial account.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
Please login to your authorized staff account to use this feature. If you like asgm setup a quick demo, let us know at support madcad. No items in cart. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams.
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. You currently cannot view this content.
Definitions and calibration techniques are given. The values given in parentheses are for information only. The properties included in this specification are those required to characterize toluene diisocyanate. Procedures for sample handling, data gathering and evaluation are included.
It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms. Finally, the procedure for sample handling, data gathering and evaluation are described.
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ASTM D2572 – 97(2010)
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View our resource center to find press releases, testimonies, infographics and more. This test method is not applicable to amine-based polyols.
There is no equivalent ISO standard. It is suitable for diols made from the commonly used initators and containing EO percentages greater than or equal to six. Criteria for building, evaluating, and validating the NIR calibration model are also described. The values stated in SI units are to be regarded as the standard.
This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions. Test Method A also applies to more viscous samples that are soluble in -butyl acetate.
Two test methods are required to give accurate results over a broad range of isomer concentrations. It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates. Please sign into an account with a subscription to this content, or email for help at support madcad.
The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.
Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. Enter your account email address to request a password reset: They also apply to many other hydroxyl-containing substances. These test methods do not apply to polyethers. This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability.
The business of chemistry providesskilled, good-paying American jobs. No further reproductions authorized. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. A blog of the American Chemistry Council: There were no books found for the applied search filters.