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TR-2 PPI PVC Range Composition Listing of Qualified Ingredients

TR-2 PPI PVC Range Composition Listing of Qualified Ingredients

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PROPERTY (PMD Test Methods)<br />

General Description<br />

Chemical analysis<br />

Particle properties<br />

Other properties<br />

REQUIREMENT<br />

Calcium carbonate coated<br />

with calcium stearate (a)<br />

Calcium carbonate analysis, min 93.00%<br />

Iron, as ferric oxide, max 0.25%<br />

Silica, SiO 2 , max. 1.25%<br />

Weight loss at 221 o F (105 o C), max 0.50%<br />

Fatty acids, as stearic acid 0.75 - 2.00<br />

Type<br />

Microcrystalline<br />

Size, micron, range 0.02 - 15.00<br />

Size, micron, mean 0.05 - 3.50<br />

Density, g/cm 3 2.65 - 2.71<br />

(a)<br />

NOTE 1:<br />

This group covers commercial calcium carbonates in which the<br />

particles are coated with commercial grades <strong>of</strong> calcium stearate and/or<br />

stearic acid. The fatty acid mixtures in these stearates are over 50<br />

percent by weight stearic acid (C18) with other fatty acids, mainly<br />

palmitic (C16) and a small amount <strong>of</strong> myristic (C14).<br />

Calcium carbonates not meeting either <strong>of</strong> these two groups <strong>of</strong> guidelines<br />

may be evaluated as a functional equivalent in accordance the policies and<br />

procedures in Part B <strong>of</strong> <strong>TR</strong>-2. When sufficient data, background, and<br />

successful usage both in production and service have been developed with<br />

other calcium carbonates, they may be considered for inclusion in a new<br />

group under these guidelines.<br />

Page 13

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