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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It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the standards used. The implementation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer’s specifications. These test methods also are applicable to many other liquids. They also apply to many other hydroxyl-containing substances.
The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. An alternative method is Test Method D Criteria for building, evaluating and validating the NIR calibration model are also described.
Definitions and calibration techniques are given. This test method is not applicable to amine-based polyols. No items in cart. There were no books found for the applied search filters. No further reproductions authorized.
ASTM – D – Reapproved – Standard Test Method for Isocyanate Groups in Urethane Mate
Other requirements may become necessary and will be added as the necessary test methods become available. The difference between d272 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. Finally, the procedure for sample handling, data gathering and evaluation are described.
This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. Jobs The business of chemistry providesskilled, good-paying American jobs.
ASTM D2572 – 97(2010)
A blog of the American Chemistry Council: The test method is applicable to products derived from toluene diisocyanate and methylene-bis- 4-phenylisocyanate. This test method may also be useful for the determination of free isocyanate monomers of other types upon taking precautions to confirm suitability. It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates.
This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. 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. ACC is investing in research to improve understanding of how chemicals impact health and the environment.
Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations. There is no equivalent ISO standard.
News View our resource center to find press releases, testimonies, infographics and more. Are you sure you want to empty the cart? Test Method A also applies to more viscous samples that are soluble in -butyl acetate.
The values stated in SI units are to be regarded as the standard. This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols. 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.
Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined. 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 test method is applicable to polyether polyols and polyether polyol blends that are used in urethane reactions.
Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future. Procedures for sample handling, data gathering and evaluation are included. Polyurethane Raw Materials Test Methods.
Register for a trial account. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. Standard Practice for Polyurethane Raw Materials: It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms.
Polyurethane Raw Materials Test Methods
Definitions, terms, and calibration techniques are described. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise. Carbon Nuclear Magnetic Resonance Spectroscopy carbon NMRmeasures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams. If you like to setup a quick demo, let us know at support madcad.
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