What is ISO 4629-1 - Titrimetric method paint binder standard about?
In analytical chemistry, the hydroxyl value is defined as the number of milligrams of potassium hydroxide required to neutralize the acetic acid taken upon acetylation of one gram of a chemical substance that contains free hydroxyl groups.
ISO 4629-1 specifies a titrimetric method for determining the free hydroxyl groups in binders and binder solutions for paints and varnishes. The hydroxyl groups may be present as polyhydric alcohols, partial esters, polyester end groups, or hydroxylated fatty acids.
NOTE: If in the case of binder solutions, the hydroxyl value of the binder only is to be determined, the possibility that other constituents of the binder solution may contain hydroxyl groups has to be taken into account.
Who is ISO 4629-1 - Titrimetric method paint binder standard for?
ISO 4629-1 on titrimetric method paint binder standard is useful for:
- Manufacturers of paints and varnishes
- Product development / innovation / research teams
- Quality control teams
Why should you use ISO 4629-1 - Titrimetric method paint binder standard?
Hydroxyl value is a measure of the content of free hydroxyl groups in a chemical substance, usually expressed in units of the mass of potassium hydroxide (KOH) in milligrams equivalent to the hydroxyl content of one gram of the chemical substance. Principle, reagents, apparatus, and sampling have been discussed in thorough detail in ISO 4629-1 apart from test procedure. Using ISO 4629-1 guidelines you can determine the free hydroxyl groups in binders and binder solutions for paints and varnishes using titrimetric method. ISO 4629-1 guidelines enable you to provide your customers with suitable, reliable, and high-quality products.
What’s changed since the last update?
BS EN ISO 4629-1:2016 supersedes BS EN ISO 4629:1998. BS EN ISO 4629-1:2016 includes some technical changes with respect to BS EN ISO 4629:1998. These include:
- The standard has been numbered as ISO 4629-1
- The standard has been editorially revised and the normative references have been updated
- The concentration of the phenolphthalein-indicator solution has been changed