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ASTM D3837-95(2012)

(Practice)

Standard Practice for Preparing a Solution of Alkali–Soluble Resins

Standard Practice for Preparing a Solution of Alkali–Soluble Resins

SIGNIFICANCE AND USE
4.1 This practice is suitable for all types of akalali-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 solution.
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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Sep-2012
ICS
83.080.10 - Thermosetting materials
Technical Committee
D21 - Polishes
Drafting Committee
D21.02 - Raw Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D3837-95(2007) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
Effective Date
01-Oct-2012
Replaced By
ASTM D3837-95(2019) - Standard Practice for Preparing a Solution of Alkali–Soluble Resins
Effective Date
01-Jul-2019

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ASTM D3837-95(2012) - Standard Practice for Preparing a Solution of Alkali–Soluble ResinsASTM D3837-95(2012) - Standard Practice for Preparing a Solution of Alkali–Soluble Resins
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ASTM D3837-95(2012) - Standard Practice for Preparing a Solution of Alkali–Soluble Resins
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3837 − 95 (Reapproved 2012)
Standard Practice for
1
Preparing a Solution of Alkali–Soluble Resins
This standard is issued under the fixed designation D3837; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Reagents and Materials
1.1 This practice is a procedure for preparing solutions of 5.1 Reaction Vessel—A three-neck, round-bottom 1000-mL
alkali-soluble resins in aqueous ammonia and determining the
flask of heat-resistant glass.
characteristics of such solutions.
5.2 Thermometer, laboratory grade, partial immersion ther-
1.2 The values stated in SI units are to be regarded as
mometer.Range:from0to230°F,2°divisions;orfrom−20to
standard. No other units of measurement are included in this
110°C, 1° divisions.
standard.
5.3 Reflux Condenser.
1.3 This standard does not purport to address all of the
5.4 Stirrer—A motor-driven, variable-speed agitator. The
safety concerns, if any, associated with its use. It is the
shaft and blade shall be of nonreactive material.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.5 Heat Source—Electric heating mantle or gas burner.
bility of regulatory limitations prior to use.
5.6 Ammonium Hydroxide, reagent grade, 28 to 30% NH
3
(26° Baumé). This solution shall be refrigerated while in
2. Referenced Documents
storage.
2
2.1 ASTM Standards:
5.7 Distilled Water, or water of equal purity.
D1544TestMethodforColorofTransparentLiquids(Gard-
ner Color Scale)
6. Preparation of Sample
D2834Test Method for Nonvolatile Matter (Total Solids) in
Water-Emulsion Floor Polishes, Solvent-Based Floor
6.1 Resinreceivedingroundorflakedformshallbeusedas
Polishes, and Polymer-Emulsion Floor Polishes
received. Select a sample representative of the material under
E70Test Method for pH of Aqueous Solutions With the
test.
Glass Electrode
6.2 Resin received in lump form shall be crushed or ground
3. Summary of Practice
and passed through a 10-mesh screen before testing. Select a
sample representative of the material under test.
3.1 Alkali-soluble resins are dissolved in water by chemi-
cally reacting available carboxylic acid sites on the resin
7. Procedure
molecule with a base to form water-soluble carboxylate salts.
In this practice, the base used is ammonium hydroxide.
7.1 Insert the reflux condenser into one of the sidearms of
the flask and support the assembly suitably. Insert the agitator
4. Significance and Use
throughthecenterneckandchargetheflaskwiththecalculated
4.1 This practice is suitable for all types of akalali-soluble
amount of ammonium hydroxide and water. Using moderate
resins. The resin manufacturer shall specify the percent am-
agitation, slowly add the resin to the contents of the flask.
monium hydroxide to be used (based on the equivalent weight
Adjust the agitator speed as necessary to keep the resin
of resin) and the maximum temperature to be used to achieve
suspended and moving, but not so fast as to entrain air into the
solution.
solution. Heat the solution to the specified temperature within
10 min, and maintain this temperature until the solution is
1
This practice is under the jurisdiction of ASTM Committee D21 on Polishes
complete,orforamaximumof30min.Ifthesolutioniscloudy
and is the
...

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SCOPE
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5.1 These test methods are suitable for use for research or for quality control to determine the total chlorine content of aromatic isocyanates. In some instances total chlorine content may correlate with performance in polyurethane systems.
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