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ISO 6796:1981

Current
Current

The latest, up-to-date edition.

Polyglycols for industrial use Determination of hydroxyl number Phthalic anhydride esterification method
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

09-01-1981

Publisher

International Organization for Standardization

The hydroxy groups present in a test portion are esterified with phthalic anhydride. The excess phthalic anhydrids is hydrolyzed and the phthalic acid formed is neutralized with standard volumetric sodium hydroxide solution. If the sample contains free acidity or alkalinity a corresponding correction is made. From the corrected hydroxyl number, the apparat relative molecular mass may be calculated by a formula given.

DocumentType
Standard
Pages
3
PublisherName
International Organization for Standardization
Status
Current

Standards Relationship
NFT 20 667 : 1984 Identical
UNE 55717:1984 Identical
NBN T 04 151 : 1983 Identical

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ASTM D 4274 : 2016 : REDLINE Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols
BS ISO 15063:2011 Plastics. Polyols for use in the production of polyurethanes. Determination of hydroxyl number by NIR spectroscopy
ISO 14900:2017 Plastics — Polyols for use in the production of polyurethane — Determination of hydroxyl number
DIN 53240-2:1998-10 DETERMINATION OF HYDROXYL VALUE - PART 2: METHOD WITH CATALYST
DIN 53240-2:2007-11 DETERMINATION OF HYDROXYL VALUE - PART 2: METHOD WITH CATALYST
ISO 15063:2011 Plastics Polyols for use in the production of polyurethanes Determination of hydroxyl number by NIR spectroscopy

ISO 2211:1973 Liquid chemical products Measurement of colour in Hazen units (platinum-cobalt scale)
ISO 1389-6:1977 Phthalic anhydride for industrial use Methods of test Part 6: Determination of phthalic anhydride content Titrimetric method

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Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
Hardcopy - French
PDF - French
PDF 3 Users - French
PDF 5 Users - French
PDF 9 Users - French
Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
Hardcopy - French
PDF - French
PDF 3 Users - French
PDF 5 Users - French
PDF 9 Users - French
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