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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No items in cart. There is no equivalent ISO standard. This test method may also be applied to other isocyanates of suitable solubility. Definitions and calibration techniques are given. In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise. ASTM grants you a license as follows: This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions.
Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined. The values stated in SI units are to be regarded as the standard. Finally, the procedure for sample handling, data gathering and evaluation are described. Criteria for building, evaluating and validating the NIR calibration model are also described.
Two test methods are required to give accurate results over a broad range of isomer concentrations. Procedures for sample handling, data gathering and evaluation are included. ACC is investing in research to improve understanding of how chemicals impact health and the environment.
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Polyurethane Raw Materials Test Methods
Please ast, into an account with a subscription to this content, or email for help at support madcad. Enter your account email address to request a password reset: These test methods also are applicable to many other liquids.
The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications.
Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. News View our resource center to find press releases, testimonies, infographics and more. The electronic file may not be reproduced in any way. Remember me for one month.
ASTM D2572 – 97(2010)
Both methods are based on asttm quantitative measurement of absorption d22572 arising from out-of-plane C-H deformation vibrations of the aromatic ring at cm- superscript: The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Other requirements may become necessary and will be added as the necessary test methods become available. Register for a trial account. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.
Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are axtm. Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams. These test methods do not apply to polyethers. For triols initiated with glycerin and trimethylol propane, an uncorrected EO value is obtained since both initiators have protons that contribute to the EO measurement.
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. This test method is not applicable to amine-based polyols. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams.
Print 1 2 3 4 5 page sstarting from page current page. The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future.
A blog of the American Chemistry Council: Test Method A also applies to more viscous samples that are soluble in -butyl acetate. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used.
Definitions, terms, and calibration techniques are described. Please login to your authorized staff account to use this feature. The difference between the total chlorine content and d25572 hydrolyzable chlorine content see ASTM D is a measure of the amount of o-dichlorobenzene and other ring-substituted chlorinated products that are present. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to View our resource center to find press releases, testimonies, infographics and more.
You currently cannot view this content. D2752 test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability.
They also apply to many other hydroxyl-containing substances. They apply only 2d572 materials whose colors have light-absorption characteristics similar to those of the standards. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. Search book title Enter keywords for book title search. There were no books found for the applied search filters. The business of chemistry providesskilled, good-paying American jobs.
It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms.