ASTM D4677 : 87(2013)

Standard Classification for Rubber Compounding Materials—Titanium Dioxide

Standard Details

1.1 This classification covers the compounding material known as titanium dioxide. It is generally used in rubber compounds to impart whiteness to selected products. Typical chemical and physical properties are included.

1.2 This standard does not purport to address all of the safety problems, 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. Table 1

TABLE 1 Properties of Titanium Dioxide (By Type)

	Test Method	Type I (Anatase)	Type II (Rutile)	Type III (Rutile)
TiO₂, min, %	D1394	95	92	85
pH	D1208	7–8.0	7–8.0	7–8.0
Coarse particles, max, %	D185	0.2	0.2	0.2
Moisture, max,%	D280	0.7	0.7	1.5
Rutile^A	D3720	1 % max	99 % min	99 % min
Tint Strength^B	...	...	...	...
Brightness^B	...	...	...	...

^A Percent rutile as a percent of total TiO₂ content.

^B Test methods to be developed and agreed upon by supplier and user. A basic white sidewall formula could be chosen to generate inherent color properties.