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ASTM D3837-95(2007)

(Practice)

Standard Practice for Preparing a Solution of Alkali-Soluble Resins

Standard Practice for Preparing a Solution of Alkali-Soluble Resins

SIGNIFICANCE AND USE
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.
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-2007
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(2002) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
Effective Date
01-Oct-2007
Replaced By
ASTM D3837-95(2012) - Standard Practice for Preparing a Solution of Alkali–Soluble Resins
Effective Date
01-Oct-2012

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ASTM D3837-95(2007) - Standard Practice for Preparing a Solution of Alkali-Soluble ResinsASTM D3837-95(2007) - Standard Practice for Preparing a Solution of Alkali-Soluble Resins
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ASTM D3837-95(2007) - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2007)
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 (´) 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-
bility of regulatory limitations prior to use. 5.4 Stirrer—A motor-driven, variable-speed agitator. The
shaft and blade shall be of nonreactive material.
2. Referenced Documents
5.5 Heat Source—Electric heating mantle or gas burner.
2.1 ASTM Standards:
5.6 Ammonium Hydroxide, reagent grade, 28 to 30% NH
D1544TestMethodforColorofTransparentLiquids(Gard-
(26° Baumé). This solution shall be refrigerated while in
ner Color Scale)
storage.
D2834Test Method for Nonvolatile Matter (Total Solids) in
5.7 Distilled Water, or water of equal purity.
Water-Emulsion Floor Polishes, Solvent-Based Floor
Polishes, and Polymer-Emulsion Floor Polishes
6. Preparation of Sample
E70Test Method for pH of Aqueous Solutions With the
Glass Electrode
6.1 Resinreceivedingroundorflakedformshallbeusedas
received. Select a sample representative of the material under
3. Summary of Practice
test.
3.1 Alkali-soluble resins are dissolved in water by chemi-
6.2 Resin received in lump form shall be crushed or ground
cally reacting available carboxylic acid sites on the resin
and passed through a 10-mesh screen before testing. Select a
molecule with a base to form water-soluble carboxylate salts.
sample representative of the material under test.
In this practice, the base used is ammonium hydroxide.
7. Procedure
4. Significance and Use
7.1 Insert the reflux condenser into one of the sidearms of
4.1 This practice is suitable for all types of akalali-soluble
the flask and support the assembly suitably. Insert the agitator
resins. The resin manufacturer shall specify the percent am-
throughthecenterneckandchargetheflaskwiththecalculated
monium hydroxide to be used (based on the equivalent weight
amount of ammonium hydroxide and water. Using moderate
of resin) and the maximum temperature to be used to achieve
agitation, slowly add the resin to the contents of the flask.
solution.
Adjust the agitator speed as necessary to keep the resin
suspended and moving, but not so fast as to entrain air into the
solution. Heat the solution to the specified temperature within
10 min, and maintain this temperature until the solution is
This practice is under the jurisdiction of ASTM Committee D21 on Polishes
and is the direct responsibility of Subcommittee D21.02 on Raw Materials.
complete,orforamaximumof30min.Ifthesolutioniscloudy
Current edition appr
...

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5.1 This method provides a simple means of characterizing the cure behavior of a thermosetting resin specimen that is a representation of a composite part. The diameter of the specimen is approximately 38 mm and the thickness ranges from 2.6 mm to 3.2 mm. This corresponds to a sample volume of approximately 3 cm3 to 4 cm3. The data may be used for quality control, research and development, and verifying the cure within processing equipment including autoclaves.  
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5.3.6 The effects of materials used to bond the resin and reinforcement,  
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5.5 This method is valid for a wide range of oscillation frequencies typically from 0.002 Hz to 50 Hz.
Note 1: It is recommended tha...
SCOPE
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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