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Standard Test Method for Polyurethane Raw Materials: Determination of Hydrolyzable Chlorine of Isocyanates
STANDARD published on 1.5.2015
Designation standards: ASTM D4663-15
Note: WITHDRAWN
Publication date standards: 1.5.2015
SKU: NS-609268
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
aromatic isocyanates, hydrolyzable chlorine, isocyanates, polyurethane raw materials, titration, toluene diisocyanate,, ICS Number Code 83.080.10 (Thermosetting materials)
Significance and Use | ||||||
5.1 This test method can be used for research or for quality control to characterize toluene diisocyanates. Hydrolyzable chlorine correlates with performance in some polyurethane systems. |
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1. Scope | ||||||
1.1 This test method determines the hydrolyzable chlorine content of toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, or mixtures of the two. It is acceptable to apply this test method to other isocyanates of suitable solubility. (See Note 1.) The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. (See Note 2.) 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Note 1: It is possible that this test method is applicable to
crude polymeric isocyanates. However, the precision with crude
polymeric isocyanates has not been established.
Note 2: This standard is identical to ISO 15028.
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2. Referenced Documents | ||||||
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