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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It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms.
Are you sure you want to empty the cart? It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. Finally, the d252 for sample handling, data gathering and evaluation are described.
Enter your account email address to request a password reset: These test methods do not apply to polyethers. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used. News View our resource center to find press releases, testimonies, infographics and more.
This test method is not applicable to amine-based polyols. These test methods also asttm applicable to many other liquids. The values given in parentheses are for information only.
A blog of the American Chemistry Council: No further reproductions authorized. The properties included in this specification are those required to characterize toluene diisocyanate.
ASTM D2572 – 97(2010)
You currently cannot view this content. Please login to your authorized staff account to use this feature. Polyurethane Raw Materials Test Methods. The test method wstm applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate.
Print 1 2 3 4 5 page sstarting from page current page. For triols initiated with glycerin and trimethylol propane, an uncorrected EO value is obtained since both initiators have protons that contribute to d572 EO measurement.
Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing atm foams. Definitions, terms, and calibration techniques are described. Two test methods are required to give accurate results over a broad range of isomer concentrations. The business of chemistry providesskilled, good-paying American jobs.
This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols. Register for a trial account.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. Search book title Enter keywords for book title search. Definitions and calibration techniques are given. It is suitable for diols made astmm the commonly used initators and containing EO percentages greater than or equal to six. There is no equivalent ISO standard. Procedures for sample handling, data gathering and evaluation are included.
They also apply to many other hydroxyl-containing substances. Please sign into an account with a subscription to this content, or email for help at support madcad. Both procedures are applicable to a variety of organic compounds but the amount of sample asttm may have to be varied.
Polyurethane Raw Materials Test Methods
Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in aastm urethane foams. The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications.
This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. Aatm items in cart. This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions.
This test method may also be applied to other isocyanates of suitable solubility. Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined.