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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Please sign into an account with a subscription to this content, or email for help at support madcad. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to Two test methods are required to give accurate results over a broad range of isomer concentrations. Test Method A also applies to more viscous samples that are soluble asmt -butyl acetate.

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It is suitable for diols made from the commonly used initators and containing EO percentages greater than or equal to six. Enter your account email address to request a password reset: The right to access the electronic files of ASTM Standards is for purposes of viewing for ast, use only. The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications.

Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined. For triols initiated qstm glycerin and trimethylol propane, an uncorrected EO value is obtained since both initiators have protons that contribute to the EO aatm.

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This test method may also be applied to other isocyanates of suitable solubility. This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations.

The values stated in SI units are to be regarded as the standard. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. No further reproductions authorized. The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. The values given in parentheses are for information only.

Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams. They also apply to many other hydroxyl-containing substances.

Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams.

Remember me for one month. The business of chemistry providesskilled, good-paying American jobs. 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

Procedures for sample handling, data gathering and v2572 are included. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined.

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Other requirements may become necessary and will be added as the necessary test methods become available. This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols. An alternative method is Test Method D Print 1 2 asrm 4 5 page sstarting from page current page.

ASTM D2572 – 97(2010)

ACC is investing in research to improve understanding of how chemicals impact health and the environment. Definitions and calibration techniques are given.

Criteria for building, evaluating, and validating the NIR calibration aetm are also described. ASTM grants you a license as follows: They apply only to materials whose colors have light-absorption characteristics similar to those of the standards.

Polyurethane Raw Materials Test Methods. There were no books found for the applied search filters. Both methods are based on the quantitative measurement of absorption bands arising from qstm C-H deformation vibrations of the aromatic ring at cm- superscript: This test method is not applicable to amine-based polyols.

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In addition the electronic files may not be d22572 or distributed elsewhere over computer networks or otherwise.

It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used. Register for a trial account. No items in cart.