ASTM D4671-05
Historical Standard: ASTM D4671-05 Standard Test Method for Polyurethane Raw Materials Determination of Unsaturation of Polyols
SUPERSEDED (see Active link, below)
ASTM D4671
1. Scope
1.1 These test methods measure unsaturation in polyether polyols. (See Note 0.)
1.1.1 Test Method A, High-Volume Reagent MethodUses about 50 mL of 0.1 M mercuric acetate reagent in methanol and 15 g or more of sample. These test methods use an indicator for colorimetric determination of an end point. It is recommended for polyols with low values (below 0.01 millequivalents per gram (meq/g)) of unsaturation where large sample sizes are required.
1.1.2 Test Method B, Low-Volume Reagent MethodUses 2 mL of ca. 0.05 M mercuric acetate reagent in methanol and about 1 g of sample or less. These test methods use a potentiometric determination of an end point.
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 0There is no equivalent ISO standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D883 Terminology Relating to Plastics
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
Keywords
polyether polyol; polyols; polyurethane raw materials; raw material; titration; unsaturation; Acetic acid release; Carbon-to-carbon unsaturated samples; Methane content; Polyols; Polyurethane raw materials--polyols; Quality control (QC)--plastics; Unsaturation;
ICS Code
ICS Number Code 83.080.20 (Thermoplastic materials)
DOI: 10.1520/D4671-05
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