ASTM D2572 PDF
March 22, 2020 | by admin
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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An alternative method is Test Method D Enter your account email address to request a password reset: The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only.
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ASTM D2572 – 97(2010)
This test method is not applicable to amine-based polyols. There were no books found for the applied search filters. ACC is investing in research to improve understanding of how chemicals impact health and the environment. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. Criteria for building, evaluating, and validating the NIR calibration c2572 are also described.
The values stated in SI units are to be regarded as the standard. This test method may also be applied to other isocyanates of suitable solubility.
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. Aastm grants you a license as follows: This alkalinity is often expressed as CPR controlled polymerization asmt of polyether polyols.
These test methods do not apply to polyethers. Content only available by subscription. The electronic file may not be reproduced in any way. This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
No further reproductions authorized. It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates. 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: Test Method A also applies to more viscous samples that are soluble in -butyl acetate.
These test methods also are applicable to many other liquids. This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability. Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams. The business of chemistry providesskilled, good-paying American jobs.
Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future. Polyurethane Raw Materials Test Methods. They apply only to materials whose colors have light-absorption characteristics similar to those of the standards.
They also apply to many other hydroxyl-containing substances. Definitions and calibration techniques are given. News View our resource center to find press releases, testimonies, infographics and more. Two test methods are required to give accurate results over a broad range of isomer concentrations. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used.
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. adtm
Procedures for sample handling, data gathering and evaluation are included. No items in cart.
If you like to setup atsm quick demo, let us know at support madcad. The main sources qstm hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid.
It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.
Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations.