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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ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
Remember me for one month. Procedures for selecting calibration materials and for collecting and treating data to develop NIR calibrations are outlined.
Polyurethane Raw Materials Test Methods. This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols.
Other requirements may become necessary and will be added as the necessary test methods become available. Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined.
It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six. This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability.
No items in cart. There is no equivalent ISO standard. Two test methods are required to give accurate results over a broad range of isomer concentrations.
ASTM D Standard Test Method for Isocyanate Groups in Urethane – Google Books
The values stated in SI units are to be regarded as the standard. Definitions, terms, and calibration techniques are described. The electronic file may not be reproduced in any way. These test methods also are applicable to many other liquids. Print 1 2 3 4 5 page sstarting from page current page.
ASTM D2572 – 97(2010)
An alternative method is Test Method D It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Standard Practice for Polyurethane Raw Materials: The properties included in this specification are those required to characterize toluene diisocyanate.
The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate.
For triols initiated with glycerin and trimethylol propane, an astmm EO value is obtained since both initiators have protons that contribute to the EO measurement. The values given in parentheses are for information only. They apply only to materials whose colors have light-absorption characteristics similar to those of the standards.
A blog of the American Chemistry Council: These test methods do not apply to polyethers.
View our resource center to find press releases, testimonies, infographics and more. Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations.
The difference between the total chlorine content and the hydrolyzable chlorine content see ASTM D is a measure of the amount of o-dichlorobenzene and other ring-substituted chlorinated products that are present.
If you like to setup a quick demo, asym us know at support madcad. This test method is not applicable to amine-based polyols. Procedures for sample handling, data gathering and evaluation are included. The business of chemistry providesskilled, good-paying American jobs. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to