ASTM D2572 PDF

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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This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability. No further reproductions authorized. You currently cannot view this content. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in ethylene oxide-propylene oxide d25722 used in flexible urethane foams.

ASTM D2572 – 97(2010)

Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams. The values given in parentheses are for information only. These test methods do not apply to polyethers. Both procedures are applicable to a variety of organic compounds but the amount wstm sample used may have to be varied.

Polyurethane Raw Materials Test Methods

Definitions and calibration techniques are given. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to Polyurethane Raw Materials Test Methods.

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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: This astk method may also be asfm to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates.

They also apply to many other hydroxyl-containing substances.

The dynamic viscosity can be obtained by multiplying the kinematic viscosity, v, by the density of the liquid.

Please sign into an account with a subscription to this content, or email for help at support madcad. A blog of the American Chemistry Council: Definitions, ashm, and calibration techniques are described. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid.

Enter your personal account email address to request a password reset: Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined. This test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions. View our resource center to find press dd2572, testimonies, infographics and more. It is applicable to d2527 derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates.

Search book title Enter keywords for book title search. It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms. The difference between the total chlorine content and the hydrolyzable chlorine content see ASTM D is x2572 measure of the amount of o-dichlorobenzene and other ring-substituted chlorinated products that are ast. The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications.

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Finally, the procedure for sample handling, data gathering and evaluation are described. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Criteria for building, evaluating, and validating the NIR calibration model are also described.

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Criteria for building, evaluating and validating the NIR calibration model are also described. The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate.

ASTM D Standard Test Method for Isocyanate Groups in Urethane – Google Books

The properties included in this specification are those required to characterize toluene diisocyanate. Register for a trial account. These test methods also are applicable to many other liquids.

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Remember me for one month. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.