ASTM D6605-06(2011)

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 E313, or the procedure for Gardner Color, Test Method D6166.
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.

General Information

• Status: Historical
• Publication Date: 31-May-2011
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.34 - Pine Chemicals and Hydrocarbon Resins

Relations

• Replaces: ASTM D6605-06 - Standard Practice for Determining the Color Stability of Hydrocarbon Resins After Heating
• Effective Date: 01-Jun-2011
• Replaced By: ASTM D6605-06(2015) - Standard Practice for Determining the Color Stability of Hydrocarbon Resins After Heating
• Effective Date: 01-Dec-2015

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6605 − 06 (Reapproved2011)
Standard Practice for
Determining the Color Stability of Hydrocarbon Resins After
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
4.1 Specimens of the hydrocarbon resin(s) to be tested are
1.1 This practice covers determination of the color stability
placed in 250-mL (8-oz) glass jars, which are placed in a
of a hydrocarbon resin by exposure to a specific temperature
heating block that is in a ventilated oven set at 175°C. The
for a defined time period in a forced-draft oven.
samples are kept in the oven for an agreed upon period.At the
1.2 Color stability is measured by the change in color of the
end of this time, the samples are removed and allowed to cool.
test resin, measured via the yellowness index color scale, in
After cooling, the samples are dissolved in toluene. The color
accordance with Practice E313, or the procedure for Gardner
of each aged resin solution is measured and compared to that
Color, Test Method D6166.
of a solution of the corresponding unaged resin. This color
1.3 The values stated in SI units are to be regarded as
increase is a measure of the (lack of) stability of the resin.
standard. The values given in parentheses are for information
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
research.
responsibility of the user of this standard to establish appro-
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
capacity.
2. Referenced Documents
6.2 Aluminum Block, equipped with a control thermocouple
2.1 ASTM Standards:
(see Fig. 1).
D6166 Test Method for Color of Pine Chemicals and Re-
6.3 Temperature Indicator.
lated Products (Instrumental Determination of Gardner
Color)
6.4 Glass Jars, 250 mL (8 oz), with suitably lined screw
D6440 Terminology Relating to Hydrocarbon Resins
cap.
E313 Practice for Calculating Yellowness and Whiteness
NOTE 1—TFE-fluorocarbon-lined caps work well.
Indices from Instrumentally Measured Color Coordinates
6.5 Balance, readable to at least 0.1g.
3. Terminology
6.6 Shaker: used to facilitate the dissolution of the resin
specimens.
3.1 Definitions:
3.1.1 Fordefinitionsoftermsrelatingtohydrocarbonresins, 6.7 Spectrophotometer or Tristimulus Colorimeter.
see Terminology D6440.
7. Reagents
7.1 Reagent Grade Toluene, or other agreed-upon solvent
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
(for example, xylene), for dissolving resins.
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins.
8. Procedure
Current edition approved June 1, 2011. Published June 2011. Originally
approved in 2000. Last previous edition approved in 2006 as D6605 – 06. DOI:
8.1 Weigh 10.0 6 0.1 g of resin into each specimen jar.
10.1520/D6605-06R11.
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 [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on NOTE 2—Avoid having resin stick to the wall of the jar, since this tends
the ASTM website. to bias the results high.
*A Summary of Changes section appears at
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