Standard Classification for Dry Pigmentary Titanium Dioxide Products

SCOPE
1.1 This classification describes seven types of dry pigmentary titanium dioxide products, grouped by composition, typical end use application, and some performance properties.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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ASTM D476-00 - Standard Classification for Dry Pigmentary Titanium Dioxide Products
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 476 – 00
Standard Classification for
Dry Pigmentary Titanium Dioxide Products
This standard is issued under the fixed designation D 476; 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 (e) 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 A minimum number of properties are given to highlight major
differences, while allowing maximum flexibility.
1.1 This classification describes seven types of dry pigmen-
tary titanium dioxide products, grouped by composition, typi-
5. Composition and Properties
cal end use application, and some performance properties.
5.1 Titanium Dioxide Pigments, should conform to the
1.2 The values stated in SI units are to be regarded as the
requirements for composition prescribed in Table 1. They are
standard. The values given in parentheses are for information
chemically prepared pigments consisting of anatase or rutile
only.
titanium dioxide with or without modifications with water-
2. Referenced Documents insoluble oxides of aluminum, silicon, zinc, etc., or other
agents; these reagent materials are introduced specifically to
2.1 ASTM Standards:
2 improve those properties for which the pigment is used. The
D 34 Guide for Chemical Analysis of White Pigments
titanium dioxide pigments shall be free of extenders such as
D 153 Test Methods for Specific Gravity of Pigments
barium sulfate, clay, magnesium silicate, whiting, etc.
D 185 Test Methods for Coarse Particles in Pigments,
5.2 The desired properties of the pigment, other than as
Pastes, and Paints
herein indicated, shall be subject to agreement between the
D 280 Test Methods for Hygroscopic Moisture (and Other
purchaser and the seller and shall be based on a satisfactory
Matter Volatile Under the Test Conditions) in Pigments
match between the submitted pigment sample and a previously
D 1394 Test Methods for Chemical Analysis of White
agreed upon reference sample (see 6.1.6).
Titanium Pigments
D 2448 Test Method forWater-Soluble Salts in Pigments by
6. Test Methods
Measuring the Specific Resistance of the Leachate of the
2 6.1 Tests shall be conducted in accordance with the follow-
Pigment
ing test methods. Test procedures not covered by ASTM test
D 3720 Test Method for Ratio of Anatase to Rutile in
2 methods shall be mutually agreed upon between the purchaser
Titanium Dioxide Pigments by X-ray Diffraction
and the seller.
3. Significance and Use 6.1.1 Chemical Analysis—Guide D 34 or Test Methods
D 1394.
3.1 This classification is given as an aid in determining the
6.1.2 Specific Gravity—Test Methods D 153.
fitness for use of a titanium dioxide pigment for a coating
6.1.3 Coarse Particles—Test Methods D 185.
application. It is limited to dry, hiding pigments. It excludes
6.1.4 Moisture—Test Method D 280.
pigment dispersions, and non-hiding specialty titanium dioxide
6.1.5 Matter Soluble in Water, Specific Resistance—Test
products.
Method D 2448. The measured specific resistance of the
4. Basis for Classification
aqueous leachage from the pigment is an index of the level of
water-soluble salts.
4.1 Titanium dioxide pigments can differ in many ways
6.1.6 Chalking Resistance—It is recommended that pur-
including composition and performance. This classification
chaser and seller agree upon standards and methods of test
outlines differences between
...

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