Norm

ASTM D4274 - 11 en

Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols

  • Deze norm is ingetrokken sinds 01-04-2016

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Over deze norm

Status Ingetrokken
Aantal pagina's 9
Gepubliceerd op 01-02-2011
Taal Engels

1.1 These 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.

1.1.1 Test Method AAcetic Anhydride Pressure Bottle, recommended for polyesters.

1.1.2 Test Method BPhthalic Anhydride Pressure Bottle, recommended for polyethers and polyesters.

1.1.3 Test Method CPhthalic Anhydride Reflux, recommended for polyethers and polyesters.

1.1.4 Test Method DImidazoleCatalyzed Phthalic Anhydride Pressure Bottle, recommended for polyethers, polyesters, polymer polyols, and amine-initiated polyols.

1.1.5 Test Method EImidazole-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).

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

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

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

Details

ICS-code 83.080.20
Engelse titel Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols
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