Overview
EN ISO 6744-1:2004 - Binders for paints and varnishes - Alkyd resins - Part 1: General methods of test (ISO 6744-1:1999) defines the general laboratory test framework for alkyd resins and alkyd resin solutions used as binders for paints and varnishes. Adopted by CEN, this part sets out which physical and chemical properties are routinely measured, references the specific ISO test methods to use, and specifies the minimum information required in a test report. It is intended to ensure consistent quality control, specification and communication between suppliers, manufacturers and purchasers.
Key topics and requirements
- Scope: Applies to alkyd resins and solutions intended as paint/varnish binders. Individual test selections are to be agreed between interested parties.
- Classification: Alkyds are classified by oil/fatty-acid content:
- Short-oil: < ~40%
- Medium-oil: ~40–60%
- Long-oil: > ~60%
- Referenced test methods: The standard points to established ISO and ASTM procedures for specific measurements, including:
- Limitations: Some methods are not applicable to alkyds containing benzoic acid, certain polybasic acids, or specific modifying components (e.g., rosin acids, vinyl toluene, styrene, isocyanates, acrylic/epoxy/silicone modifiers) - selection must be agreed.
- Test report content: Reports must reference ISO 6744-1, identify the product, list results and methods used, note any deviations, and include test dates.
Applications and users
- Who uses it: Alkyd resin manufacturers, paint and varnish formulators, quality control laboratories, procurement/specification engineers, and conformity assessors.
- Practical uses:
- Establishing supplier quality agreements and product specifications
- Routine quality control testing of alkyd binder lots and solutions
- Verifying suitability of binders for specific coating formulations
- Supporting regulatory, tendering and certification documentation
Related standards
- EN ISO 6744-2: Determination of phthalic anhydride content
- EN ISO 6744-3: Determination of unsaponifiable matter content
- EN ISO 6744-4: Determination of fatty acid content
- ISO 1523, ISO 2431, ISO 2811-1, ISO 3219, ISO 3251, ISO 3681, ISO 3682, ISO 4629, ISO 4630, ISO 6271, ISO 15716
Keywords: EN ISO 6744-1:2004, alkyd resins, binders for paints and varnishes, methods of test, paint industry, quality control, non-volatile matter, viscosity, acid value.
