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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Standard Practice for Polyurethane Raw Materials: Definitions, terms, and calibration techniques are described. This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols. If you like to setup a quick demo, let us astmm at support madcad. ASTM grants you a license as follows: Test Method A also applies to more viscous samples that are soluble in -butyl acetate.
ASTM D2572 – 97(2010)
The properties included in this specification are those required to characterize toluene diisocyanate. 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. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams.
It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms. Please sign into an account with a subscription to this content, or email for help at support madcad. Criteria for building, evaluating and validating the NIR calibration model are also described.
View our resource center to find press releases, testimonies, infographics and more. It is suitable for diols made from the commonly used initators 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. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to 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. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future.
Remember me for one month. An alternative method is Test Method D This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability.
Register for a trial account. Enter satm account email address to request a password reset: These test methods do not apply to polyethers. This test method is not applicable to amine-based polyols. These test methods also are applicable to many other liquids. No further reproductions authorized. This test method may also be applied to other isocyanates of suitable solubility.
This d252 method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
The business of chemistry providesskilled, good-paying American jobs. You currently cannot view this content. In addition d252 electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise. Criteria for building, evaluating, and validating the NIR calibration model are also described.
They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. No items in cart. 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: The values stated in SI units are to be regarded as the standard. Are you sure you want to empty the cart?
ASTM D Standard Test Method for Isocyanate Groups in Urethane – Google Books
Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams.
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. A blog of the American Chemistry Council: There is no equivalent ISO standard.
Enter your personal account email address to request a password reset: Two methods based on infrared spectroscopy are r2572 to give accurate results over a broad range of isomer concentrations. Definitions and calibration techniques are given.
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.
Procedures for sample handling, data gathering and evaluation are included. The values given in v2572 are for information only.
Other requirements may become necessary and will be added as the necessary test methods become available. It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates. S2572 1 2 3 4 5 page sstarting from page current page.
Please login to your authorized staff account to use this feature. The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid.