ASTM D476-00(2005)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D476 – 00 (Reapproved 2005)
Standard Classification for
Dry Pigmentary Titanium Dioxide Products
This standard is issued under the fixed designation D476; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope outlines differences between pigment types that should be
considered when selecting a product for a coating application.
1.1 This classification describes seven types of dry pigmen-
Aminimum number of properties are given to highlight major
tary titanium dioxide products, grouped by composition, typi-
differences, while allowing maximum flexibility.
cal end use application, and some performance properties.
1.2 The values stated in SI units are to be regarded as the
5. Composition and Properties
standard. The values given in parentheses are for information
5.1 Titanium Dioxide Pigments, should conform to the
only.
requirements for composition prescribed in Table 1. They are
2. Referenced Documents chemically prepared pigments consisting of anatase or rutile
titanium dioxide with or without modifications with water-
2.1 ASTM Standards:
insoluble oxides of aluminum, silicon, zinc, etc., or other
D34 Guide for Chemical Analysis of White Pigments
agents; these reagent materials are introduced specifically to
D153 Test Methods for Specific Gravity of Pigments
improve those properties for which the pigment is used. The
D185 Test Methods for Coarse Particles in Pigments
titanium dioxide pigments shall be free of extenders such as
D280 Test Methods for Hygroscopic Moisture (and Other
barium sulfate, clay, magnesium silicate, whiting, etc.
Matter Volatile Under the Test Conditions) in Pigments
5.2 The desired properties of the pigment, other than as
D1394 Test Methods for Chemical Analysis of White Tita-
herein indicated, shall be subject to agreement between the
nium Pigments
purchaser and the seller and shall be based on a satisfactory
D2448 Test Method for Water-Soluble Salts in Pigments by
match between the submitted pigment sample and a previously
Measuring the Specific Resistance of the Leachate of the
agreed upon reference sample (see 6.1.6).
Pigment
D3720 Test Method for Ratio of Anatase to Rutile in
6. Test Methods
Titanium Dioxide Pigments by X-Ray Diffraction
6.1 Tests shall be conducted in accordance with the follow-
3. Significance and Use ing test methods. Test procedures not covered by ASTM test
methods shall be mutually agreed upon between the purchaser
3.1 This classification is given as an aid in determining the
and the seller.
fitness for use of a titanium dioxide pigment for a coating
6.1.1 Chemical Analysis—Guide D34 or Test Methods
application. It is limited to dry, hiding pigments. It excludes
D1394.
pigment dispersions, and non-hiding specialty titanium dioxide
6.1.2 Specific Gravity—Test Methods D153.
products.
6.1.3 Coarse Particles—Test Methods D185.
4. Basis for Classification 6.1.4 Moisture—Test Methods D280.
6.1.5 Matter Soluble in Water, Specific Resistance—Test
4.1 Titanium dioxide pigments can differ in many ways,
Method D2448. The measured specific resistance of the aque-
including composition and performance. This classification
ous leachage from the pigment is an index of the level of
water-soluble salts.
This classification is under the jurisdiction of ASTM Committee D01 on Paint
6.1.6 Chalking Resistance—It is recommended that pur-
and Related Coatings, Material
...