ASTM D6887-03(R2020) pdf free download

ASTM D6887-03(R2020) pdf free download.Standard Test Method for Testing Alkyd Compatibility with Resin or Resin Solutions
1. Scope
1.1 This test method covers the procedure for determining the degree of compatibility of an alkyd with a specific resin or resin solution. 1.2 The most common use of this method is to test alkyd compatibility with a hydrocarbon resin or a solution of the resin in an aliphatic solvent, for lithographic ink vehicle applications. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards: 2 D6038 Test Methods for Determining the Compatibility of Resin/Solvent Mixtures by Precipitation Temperature (Cloud Point)
3. Terminology
3.1 Definitions: 3.1.1 compatibility, n—resin and solvent mixture forms a clear, homogenous, and stable solution. D6038 3.1.2 incompatibility, n—resin and solvent mixture does not form a clear, homogenous, and stable solution.
4. Summary of Test Method
4.1 The required resin to alkyd ratio is mixed into a 150-mL beaker and heated to 160°C until clear and homogenous. 4.2 The solution is placed into pre-labeled jars and cooled. 4.3 Degree of compatibility is reported at 30 min and 24 h after cooling to room temperature.
5. Significance and Use
5.1 Incompatibility of the system can lead to loss of gloss, decreased color strength, rheological problems and grind issues in the flush or pigment base. 5.2 This method is used in the lithographic industry, espe- cially in pigment wetting applications, where the alkyd may or may not be totally compatible with the resin selected for the application.
6. Apparatus
6.1 Beakers, 150 mL (4). 6.2 Jars, with lids, 4 oz (4). 6.3 Balance, capacity of at least 200 g, accurate to 60.1 g. 6.4 Hot Plate, capable of heating to a minimum of 200°C. 6.5 Thermometer, 0 to 200°C, 61°C. 6.6 Spatula, or stirrer rods.
7. Test Samples
7.1 Alkyd to be tested. 7.2 Resin or resin solution.
8.4 Pour the blend from each beaker into the appropriately labeled jar then cool to room temperature. 8.5 Wait 30 min then visually observe degree of clarity of each test sample. N OTE 1—Some applications may require a longer waiting time such as 24 h. If this is the case, record compatibility of the solution after 24 h.
9. Report
9.1 Report the highest ratio where the blend remained clear after 30 min or 24 h (time should be agreed upon by user ofthis test method and application). 9.2 Ifthe mixtures are clear at all ratios tested, then the resin can be considered compatible to the highest ratio tested.
10. Precision and Bias 3
10.1 An inter-laboratory study was conducted in which six laboratories tested the compatibility of two hydrocarbon resins with two alkyds. All laboratories agreed on the compatibility/ incompatibility of each hydrocarbon resin with each alkyd. However, since the test is non-quantitative, it is not possible to compute repeatability, reproducibility or bias.
11. Keywords
11.1 aliphatic solvents; alkyds; compatibility; hydrocarbon resins; lithographic inks; pigment wettings; resin solutions