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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ASTM D2572 – 97(2010)
Please login to your authorized staff account to use this feature. Definitions and calibration techniques are given. This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to ACC is investing in research to improve understanding of how chemicals impact health and the environment.
Are you sure you want to empty the cart? This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. If you like to setup a quick demo, let qstm know at support madcad. Both procedures are applicable to a variety asmt organic compounds but the amount of sample used may have to be varied. The test method is applicable to products derived from toluene f2572 and methylene-bis- 4-phenylisocyanate.
Content only available by subscription. Jobs The business of chemistry providesskilled, good-paying American jobs. The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, d2527 dioxide, and hydrochloric acid. The electronic file may not be reproduced in any way.
The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications. The difference between the total chlorine content and the 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 applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates.
It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms. 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. This test method is not applicable to amine-based polyols. News View x2572 resource center to find press releases, testimonies, infographics and more.
Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined.
A blog of the American Chemistry Council: An alternative method is Test Method D It is suitable for atm and triols made from the commonly used initiators and containing EO percentages greater than or equal to six. Procedures for sample handling, data gathering and evaluation are included. No further reproductions authorized. Finally, the procedure for sample handling, data gathering and evaluation are described.
ASTM grants you a license as follows: Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations.
Polyurethane Raw Materials Test Methods
The properties included in this specification are those required to characterize toluene diisocyanate. The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid.
It is suitable for diols made from the commonly used initators and containing EO percentages greater than or equal to six. Enter your personal account email address to request a password reset: Search book title Enter keywords for book title search.
View our resource center to find press releases, testimonies, infographics and more. Two test methods are required to give asmt results over a broad range of isomer concentrations.