ASTM D2572 PDF

Shagul Please sign into an account with a subscription to this content, or email for help at support madcad. Are you sure you want to empty the cart? Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.

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Shagul Please sign into an account with a subscription to this content, or email for help at support madcad. Are you sure you want to empty the cart? Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. It is suitable for diols and triols made from the commonly used initiators and containing EO percentages greater than or equal to six.

They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Fluorine Nuclear Magnetic Resonance Spectroscopy fluorine NMRmeasures the primary hydroxyl content in r oxide-propylene oxide polyethers used in flexible urethane foams.

The business of chemistry providesskilled, good-paying American jobs. If you like to setup a quick demo, let us know at support madcad. The properties included in this specification are those required to characterize toluene diisocyanate. Criteria for building, evaluating, and validating the NIR calibration model are also described. It is suitable for polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to It is applicable to products derived from toluene diisocyanate, methylene-bis- 4-phenyl isocyanateand polymethylene polyphenyl isocyanates.

This alkalinity is often expressed as CPR controlled polymerization rate of polyether polyols. Chemistry is the Science Behind Sustainability — the products, technologies and innovations enabled by the chemical industry are essential to a sustainable future. You currently cannot view this content. Search book title Ast, keywords for book title search. There were no books found for the applied search filters.

These test methods do not apply to polyethers. This test method may also be applied to other isocyanates of suitable solubility. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of c standards used.

ACC is investing in research to improve understanding of how chemicals impact health and the environment. Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined. 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.

Test Method A also applies to more viscous samples that are soluble in -butyl acetate. View our resource center to find press releases, testimonies, infographics and more. This test method may also be applied to other isocyanates of suitable solubility, such as crude or refined polymeric isocyanates. Content only available by subscription. The values given in parentheses are for information only.

Finally, the procedure for sample handling, data gathering c evaluation are described. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid.

This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols. It is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms.

Register for a trial account. News View our resource center to find press releases, testimonies, infographics and more. Standard Practice for Polyurethane Raw Materials: They also apply to many other hydroxyl-containing substances. These test methods also are applicable to many other liquids. The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Two methods based on infrared spectroscopy are required to give accurate results over a broad range of isomer concentrations.

This test method is not applicable to amine-based polyols. Two test methods asttm required to give accurate results over a broad range of isomer concentrations. TOP Related Articles.

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ASTM D2572 PDF

Samusida It is suitable atm polyethers with hydroxyl numbers of 24 to and primary hydroxyl percentages of 2 to The values stated in SI units are to be regarded as the standard. This test method is not applicable to amine-based polyols. 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. This test method is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols, and rigid polyols.

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ASTM D2572

A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense. No other units of measurement are included in thisstandard. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.

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