ASTM D5629-11

Standard Test Method for Polyurethane Raw Materials Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers

STANDARD published on 1.2.2011

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The information about the standard:

Designation standards: ASTM D5629-11
Note: WITHDRAWN
Publication date standards: 1.2.2011
SKU: NS-31945
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Thermosetting materials

Annotation of standard text ASTM D5629-11 :

Keywords:
acidity, aromatic isocyanates, isocyanates, methylene-bis-(4-phenylisocyanate), methylene di(phenylisocyanate), methylene diphenyldiisocyanate, MDI, prepolymer, polyurethane, raw materials, test method, TDI, titration, toluene diisocyanate, Toluene diisocyanate (TDI), Aromatic isocyanates, Isocyanates, MDI (methylenediphenyldiisocyanate), Acidity, alkalinity, pH--plastics, Polyurethane raw materials--isocyanates, Prepolymers, Titration, ICS Number Code 83.080.10 (Thermosetting materials)

Additional information

Significance and Use

This test method can be used for research or for quality control to characterize aromatic isocyanates and low-acidity prepolymers. Acidity correlates with performance in some polyurethane systems.

1. Scope

1.1 This test method measures the acidity, expressed as ppm of hydrochloric acid (HCl), in aromatic isocyanate or polyurethane prepolymer samples of below 100 ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene di(phenylisocyanate) (see Note 1). Refer to Test Method D6099 for determination of acidity in moderate- to high-acidity aromatic isocyanates.

1.2 The values stated in SI units are to be regarded as the standard.

1.3 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—This standard is equivalent to ISO 14898, Method B.

2. Referenced Documents

E180-03	Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009)
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO 14898	PlasticsAromatic Isocyanates for Use in the Production of PolyurethaneDetermination of Acidity
D6099-24	Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates
D883-24	Standard Terminology Relating to Plastics