ASTM D6605-06
(Practice)Standard Practice for Determining the Color Stability of Hydrocarbon Resins After Heating
Standard Practice for Determining the Color Stability of Hydrocarbon Resins After Heating
SIGNIFICANCE AND USE
This practice is useful for both quality control and research.
SCOPE
1.1 This practice covers determination of the color stability of a hydrocarbon resin by exposure to a specific temperature for a defined time period in a forced-draft oven.
1.2 Color stability is measured by the change in color of the test resin, measured via the yellowness index color scale, in accordance with Practice E 313, or the procedure for Gardner Color, Test Method D 6166.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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.
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Designation:D6605–06
Standard Practice for
Determining the Color Stability of Hydrocarbon Resins After
1
Heating
This standard is issued under the fixed designation D6605; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Summary of Practice
1.1 This practice covers determination of the color stability 4.1 Specimens of the hydrocarbon resin(s) to be tested are
of a hydrocarbon resin by exposure to a specific temperature placed in 250-mL (8-oz) glass jars, which are placed in a
for a defined time period in a forced-draft oven. heating block that is in a ventilated oven set at 175°C. The
1.2 Color stability is measured by the change in color of the samples are kept in the oven for an agreed upon period.At the
test resin, measured via the yellowness index color scale, in end of this time, the samples are removed and allowed to cool.
accordance with Practice E313, or the procedure for Gardner After cooling, the samples are dissolved in toluene. The color
Color, Test Method D6166. of each aged resin solution is measured and compared to that
1.3 The values stated in SI units are to be regarded as of a solution of the corresponding unaged resin. This color
standard. The values given in parentheses are for information increase is a measure of the (lack of) stability of the resin.
only.
5. Significance and Use
1.4 This standard does not purport to address all of the
5.1 This practice is useful for both quality control and
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- research.
priate safety and health practices and determine the applica-
6. Apparatus and Materials
bility of regulatory limitations prior to use.
6.1 Forced Draft Oven, with the ventilation set at maximum
2. Referenced Documents
capacity.
2
2.1 ASTM Standards: 6.2 Aluminum Block, equipped with a control thermocouple
D6166 Test Method for Color of Naval Stores and Related (see Fig. 1).
6.3 Temperature Indicator.
Products (Instrumental Determination of Gardner Color)
D6440 Terminology Relating to Hydrocarbon Resins 6.4 Glass Jars, 250 mL (8 oz), with suitably lined screw
cap.
E313 Practice for Calculating Yellowness and Whiteness
Indices from Instrumentally Measured Color Coordinates
NOTE 1—TFE-fluorocarbon-lined caps work well.
3. Terminology 6.5 Balance, readable to at least 0.1g.
6.6 Shaker: used to facilitate the dissolution of the resin
3.1 Definitions:
specimens.
3.1.1 Fordefinitionsoftermsrelatingtohydrocarbonresins,
6.7 Spectrophotometer or Tristimulus Colorimeter.
see Terminology D6440.
7. Reagents
1 7.1 Reagent Grade Toluene, or other agreed-upon solvent
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of (for example, xylene), for dissolving resins.
Subcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins.
Current edition approved Nov. 1, 2006. Published November 2006. Originally
8. Procedure
approved in 2000. Last previous edition approved in 2000 as D6605 - 00. DOI:
8.1 Weigh 10.0 6 0.1 g of resin into each specimen jar.
10.1520/D6605-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8.2 Tap each jar gently to flatten the resin layer.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
NOTE 2—Avoid having resin stick to the wall of the jar, since this tends
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. to bias the results high.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6605–06
FIG. 1 Measurements in Millimetres
8.3 Install the aluminum block (see Fig. 1) in the center of 8.8 Remove the jar(s) after the desired test time, seal and
an electronically regulated oven with the ventilation set at allow to cool for at least 30 min. After cooling, add 10 g of
maximum. toluene to each jar and close tightly. For each resin sample, to
8.4 Set the oven controls so that the control thermocouple another jar add 10 6 0.1 g of the unaged resin and 10 g of
reads 175.0°C 6 0.5°C. toluene; then shake the jars until the resin dissolves.
8.5 Warning—An increase or decrease in the oven tem- 8.9 Measure tristimulus values for CIE 1931 standard ob-
perature from the specified temperature may alter the results. server and Illuminant C. Calculate yellowness index (YI)
values
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6605–00 Designation:D6605–06
Standard Practice for
Determining the Color Stability of Hydrocarbon Resins After
1
Heating
This standard is issued under the fixed designation D 6605; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers the determination of the color stability of a hydrocarbon resin by exposure to a specific temperature
for a defined time period in a forced-draft oven.
1.2 Color stability is measured by the change in color of the test resin, measured via the yellowness index color scale, in
accordance with Practice E 313, or the procedure for Gardner Color, Test Method D 6166.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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 appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 6166 Test Method for Color of Naval Stores and Related Products,Products (Instrumental Determination of Gardner Color)
D 6440 Terminology Relating to Hydrocarbon Resins
E 313 PracticeforCalculatingYellownessandWhitenessIndicesfromInstrumentallyMeasuredColorCoordinates.Coordinates
3. Summary of Practice
3.1Samples of the hydrocarbon resin to be tested are placed in 250-mL (8-oz) glass jars and placed in a heating block that is
in a ventilated oven set at 175°C. The samples are kept in the oven for a given period of 5 h.At the end of this time, the samples
are removed and allowed to cool. After cooling, the samples are dissolved in toluene. The color of each aged sample solution is
measured and compared to an initial sample solution. This color change is a measure of the stability of the resin. Terminology
3.1 Definitions:
3.1.1 For definitions of terms relating to hydrocarbon resins, see Terminology D 6440.
4. Significance and Use
4.1This practice is useful for both quality control and research. Summary of Practice
4.1 Specimens of the hydrocarbon resin(s) to be tested are placed in 250-mL (8-oz) glass jars, which are placed in a heating
block that is in a ventilated oven set at 175°C. The samples are kept in the oven for an agreed upon period.At the end of this time,
the samples are removed and allowed to cool. After cooling, the samples are dissolved in toluene. The color of each aged resin
solution is measured and compared to that of a solution of the corresponding unaged resin. This color increase is a measure of the
(lack of) stability of the resin.
5. Significance and Use
5.1 This practice is useful for both quality control and research.
6. Apparatus and Materials
5.1
6.1 Forced Draft Oven, with the ventilation set at maximum capacity.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.38 onHydrocarbon Resins.
Current edition approved Nov. 10, 2000. Published January 2001.
Current edition approved Nov. 1, 2006. Published November 2006. Originally approved in 2000. Last previous edition approved in 2000 as D 6605 - 00.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 06.03.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6605–06
5.2
6.2 Aluminum Block, equipped with a control thermocouple (see Fig. 1).
5.3
6.3 Temperature Indicator.
5.4
6.4 Glass Jars, 250 mL (8 oz), with suitably lined screw cap.
NOTE1—Tetrafluoroethylene (TFE) lined caps work well.
5.5 1—TFE-fluorocarbon-lined caps work well.
6.5 Balance, readable to at least 0.1g.
5.6
6.6 Shaker: used to facilitate the dissolution of the heat-aged resin.resin specimens.
5.76.7 Spectrophotometer or Tristimulus Colorimeter.
6.
7. Reagents
6.1
FIG. 1 Measurements in Millimetres
2
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