Standard Practice for
Preparing a Solution of Alkali–Soluble Resins1
This standard is issued under the fixed designation D 3837; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice is a procedure for preparing solutions of
alkali-soluble resins in aqueous ammonia and determining the
characteristics of such solutions.
1.2 This standard does not purport to address all of the
safety concerns associated with its use if any. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations before use.
2. Referenced Documents
2.1 ASTM Standards:
D 1544 Test Method for Color of Transparent Liquids
(Gardner Color Scale)2
D 2834 Test Method for Nonvolatile Matter (Total Solids)
in Water-Emulsion Floor Polishes, Solvent-Based Floor
Polishes, and Polymer-Emulsion Floor Polishes3
E 70 Test Method for pH of Aqueous Solutions with the
Glass Electrode4
3. Summary of Practice
3.1 Alkali-soluble resins are dissolved in water by chemically reacting available carboxylic acid sites on the resin
a molecule with a base to form water-soluble carboxylate salts.
In this practice, the base used is ammonium hydroxide.
4. Significance and Use
4.1 This practice is suitable for all types of alkali-soluble
resins. The resin manufacturer shall specify the percent ammonium hydroxide to be used (based on the equivalent weight
of resin) and the maximum temperature to be used to achieve
a solution.
5. Reagents and Materials
5.1 Reaction Vessel—A three-neck, round-bottom 1000-mL
flask of heat-resistant glass.
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