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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Register for a trial account. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to This test method may also be applied to other isocyanates of suitable solubility.
The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future. This test method is not applicable to amine-based polyols. This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. ACC is investing in research to improve understanding of how chemicals impact health and the environment.
The business of chemistry providesskilled, good-paying American jobs. 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, such as crude or refined polymeric isocyanates. The electronic file may not be reproduced in any way. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.
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. Test Method A also applies to more viscous samples that are soluble in -butyl acetate.
There is no equivalent ISO standard. Enter your account email address axtm request a password reset: The properties included in this specification are those required to characterize toluene diisocyanate. Finally, the procedure for sample handling, data gathering and evaluation are described.
Print 1 2 3 4 5 page sstarting from page current page. You currently cannot view this content. They also apply to many other hydroxyl-containing substances. It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates. These test methods do not apply to polyethers. No items in cart.
ASTM D2572 – 97(2010)
They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams. Standard Practice for Polyurethane Raw Materials: Carbon C2572 Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams.
Enter your personal account email address to request a password reset: Content only available by subscription. The values given in parentheses are for information only. Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied.
ASTM D Standard Test Method for Isocyanate Groups in Urethane – Google Books
Criteria for building, evaluating, and validating the NIR calibration model are also described. The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Are you sure you want to empty the cart? Please login to your authorized staff account to use this feature. Criteria for building, evaluating and validating the NIR calibration model are also described.
Polyurethane Raw Materials Test Methods.
This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions.
It is suitable for diols made from the commonly used initators and containing EO percentages greater than or equal to six. Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined.
Two test methods are required to give accurate results over a broad range of isomer concentrations.