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ASTM D3837-95(2002)

(Practice)

Standard Practice for Preparing a Solution of Alkali-Soluble Resins

Standard Practice for Preparing a Solution of Alkali-Soluble Resins

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, 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
09-Oct-1995
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 - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
Effective Date
10-Oct-1995
Replaced By
ASTM D3837-95(2007) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
Effective Date
01-Oct-2007

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ASTM D3837-95(2002) - Standard Practice for Preparing a Solution of Alkali-Soluble ResinsASTM D3837-95(2002) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
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ASTM D3837-95(2002) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2002)
Standard Practice for
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 (e) 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—Athree-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 This standard does not purport to address all of the mometer.Range:from0to230°F,2°divisions;orfrom−20to
safety concerns, if any, associated with its use. It is the 110°C, 1° divisions.
responsibility of the user of this standard to establish appro- 5.3 Reflux Condenser.
priate safety and health practices and determine the applica- 5.4 Stirrer—A motor-driven, variable-speed agitator. The
bility of regulatory limitations prior to use. shaft and blade shall be of nonreactive material.
5.5 Heat Source—Electric heating mantle or gas burner.
2. Referenced Documents
5.6 Ammonium Hydroxide, reagent grade, 28 to 30% NH
2.1 ASTM Standards: (26° Baumé). This solution shall be refrigerated while in
D1544 Test Method for Color of Transparent Liquids
storage.
(Gardner Color Scale) 5.7 Distilled Water, or water of equal purity.
D2834 Test Method for Nonvolatile Matter (Total Solids)
6. Preparation of Sample
in Water-Emulsion Floor Polishes, Solvent-Based Floor
Polishes, and Polymer-Emulsion Floor Polishes 6.1 Resinreceivedingroundorflakedformshallbeusedas
E70 Test Method for pH of Aqueous Solutions with the received. Select a sample representative of the material under
Glass Electrode test.
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
3.1 Alkali-soluble resins are dissolved in water by chemi- sample representative of the material under test.
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
complete,orforamaximumof30min.Ifthesolutioniscloudy
or ha
...

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Note 1: It is recommended tha...
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1.1 This method covers the use of dynamic mechanical instrumentation for determination and reporting of the thermal advancement of cure behavior of thermosetting resin on an inert filler or fiber in a laboratory. It may also be used for determining the cure properties of resins without fillers or fibers. These encapsulated specimens are deformed in torsional shear using dynamic mechanical methods.  
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