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ASTM D 4274 : 2016

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols
Available format(s)

Hardcopy , PDF

Superseded date

08-13-2021

Language(s)

English

Published date

04-08-2016

These test methods measure the hydroxyl groups in polyester and polyether polyols containing primary and secondary hydroxyl groups.

1.1These test methods measure the hydroxyl groups in polyester and polyether polyols containing primary and secondary hydroxyl groups. They also apply to many other hydroxyl-containing substances.

1.1.1Test Method A—Acetic Anhydride Pressure Bottle, recommended for polyesters.

1.1.2Test Method B—Phthalic Anhydride Pressure Bottle, recommended for polyethers and polyesters.

1.1.3Test Method C—Phthalic Anhydride Reflux, recommended for polyethers and polyesters.

1.1.4Test Method D—Imidazole–Catalyzed Phthalic Anhydride Pressure Bottle, recommended for polyethers, polyesters, polymer polyols, and amine-initiated polyols.

1.1.5Test Method E—Imidazole-Catalyzed Pyromellitic Dianhydride Esterification, recommended for polyols used for flexible and rigid polyurethane foams and urethane elastomers. It is recommended for polyester polyols, polyether polyols, amine-started polyols, and polymer polyols (polyacrylonitrile/copolystyrene-based).

1.2Another ASTM test method for measuring hydroxyl groups is Test Method E222.

1.3The values stated in SI units are to be regarded as the standard.

1.4This 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, ISO 14900 and ISO 6796 address the same subject matter, but differ in technical content.

Committee
D 20
DocumentType
Test Method
Pages
10
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM E 1899 : 2016 Standard Test Method for Hydroxyl Groups Using Reaction with <emph type="ital">p</emph >-Toluenesulfonyl Isocyanate (TSI) and Potentiometric Titration with Tetrabutylammonium Hydroxide
ASTM D 6342 : 2012 : R2017 : EDT 1 Standard Practice for Polyurethane Raw Materials: Determining Hydroxyl Number of Polyols by Near Infrared (NIR) Spectroscopy

ASTM D 1193 : 1977 : R1983 : EDT 1 Standard Specification for Reagent Water
ASTM E 691 : 2020 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2019 : EDT 1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 1193 : 2006 : R2011 Standard Specification for Reagent Water
ASTM E 691 : 2009 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 1193 : 1991 Standard Specification for Reagent Water
ASTM D 1193 : 1970 Standard Specification For Reagent Water
ASTM D 1193 : 2006 Standard Specification for Reagent Water
ASTM D 1193 : 1999 Standard Specification for Reagent Water
ASTM D 1193 : 2006 : R2018 Standard Specification for Reagent Water

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