precipitated calcium carbonate series 2
Activated precipitated calcium carbonate
Activated calcium carbonate /super-fine activated calcium carbonate: It is produced in the wet/dry method activation process using stearic acid and coupling agent as activator. It can improve the flexibility, impact strength, tensile strength of materials; mainly used for plastics and rubber products.
Item |
Industry standard |
Enterprise standard |
|
First quality |
Qualifier |
calcium carbonate CaCo3, % ≥ |
96.0 |
95.0 |
98.0 |
pH-value (10% suspension) |
8.0-10.5 |
8.0-11.0 |
8.0-10.0 |
105°C volatiles, %≤ |
0.50 |
0.70 |
0.40 |
Insol. in Hcl, % ≤ |
0.20 |
0.30 |
0.06 |
Oil absorption, g /100g≤ |
70 |
80 |
70 |
Residue on sieve |
125µm test sieve, % ≤ |
0.010 |
0.015 |
0 |
45µm test sieve, %≤ |
0.30 |
0.40 |
0.05 |
Whiteness, degree ≥ |
90.0 |
|
93.0 |
Activation grade, % ≥ |
95 |
90 |
98 |
Free alkalis (CaO)%≤ |
|
|
0.03 |
|
