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ISO 9020:1994

Feb 1994 Withdrawn

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Binders for paints and varnishes — Determination of free-formaldehyde content of amino resins — Sodium sulfite titrimetric method — Technical Corrigendum 1 Withdrawn ISO 9020:1994/Cor 1:1996 Corrigendum from Publication date: Jun 1996 Language: English Services: Online, Online + Pdf

Abstract

The method specified is based on reacting free formaldehyde and alcohol formaldehyde semiacetals in a test portion with excess sodium sulfite solution at a temperature of 0 °C to form hydroxymethane sulfonate, titrating the excess sodium sulfite with iodine solution, decomposing hydroxymethane sulfonate with sodium carbonate solution and titrating the sodium sulfite liberated with iodine solution. The method is applicable to resins resulting from the polycondensation of urea and melamine with formaldehyde and to furan resins resulting from the polycondensation of furfuryl alcohol with formaldehyde without further modification.

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Standard from ISO
Published: February 3 1994
Withdrawn: March 3 2004
Period for objection until: September 17 1987
Edition: 1
Document type: IS
Pages
ISBN:

Publisher: ISO
Distributor: ISO
ICS: 87.060.20
International TC: ISO/TC 35

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Revised by: ISO 11402:2004
Adopted by: NF EN ISO 9020:1998
Adopted by: SN EN ISO 9020:1998

ISO 9020:1994

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Version history Related Corrigenda and Amendments (1)

ISO 9020:1994/Cor 1:1996

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