Product Description Rubber Black
Rubber Black consists of carbon. The types of Rubber Blacks used in the rubber industry are manufactured according to strict specifications and quality standards. Here, structure and specific surface area are the key factors in optimizing reinforcement properties in rubber polymers. Rubber Blacks are categorized into Hard Blacks and Soft Blacks based on their specific surface area.
Hard Blacks, for instance, strengthen a rubber compound’s ability to resist abrasion. Soft Blacks, on the other hand, are used in those cases where, for instance, elasticity, shape stability under pressure and good dynamic properties are important.
Evonik Degussa’s CORAX® brand covers a variety of Hard and Soft Blacks that meet ASTM (American Society For Testing And Materials) standards as well as specialty products like High Performance Blacks. The PUREX® range addresses applications that depend on excellent rubber black dispersion. Yet another line, ECORAX®, is specifically designed for the tire industry. These Rubber Blacks significantly reduce rolling resistance in truck tires, which improves fuel economy. PRINTEX® Blacks deliver benefits where electric conductivity is important.
One particularity in Evonik Degussa’s portfolio is the DUREX® brand: these Rubber Blacks for technical rubber goods ensure outstanding spray properties, surface smoothness and a unique combination of mechanical rubber properties.
Evonik Degussa GmbH Rubber Blacks are used as reinforcing fillers for determining specific vulcanization properties. Selecting the specific type and concentration of Rubber Black will determine the desired capabilities and properties of the vulcanized good.
The following table shows the change in property profile of a vulcanized good with increasing structure or surface, underlining the importance of structure and surface in determining rubber properties.
Areas of Application
Products
| |
CTAB |
Oilabsorption |
Oilabsorption of compressed sample |
Sieve Residue |
| |
m²/g |
ml/100g |
ml/100g |
ppm max |
| Corax N 115 |
128 |
113 |
97 |
300 |
| Corax N 121 |
121 |
132 |
112 |
300 |
| Corax N 125 |
126 |
104 |
89 |
300 |
| Corax N 134 |
134 |
127 |
102 |
300 |
| Corax N 220 |
111 |
114 |
98 |
300 |
| Corax N 234 |
119 |
125 |
100 |
300 |
| Corax N 326 |
83 |
72 |
69 |
300 |
| Corax N 326 MP |
83 |
72 |
67 |
300 |
| Corax N 330 |
82 |
102 |
88 |
300 |
| Corax N 339 |
92 |
120 |
99 |
300 |
| Corax N 347 |
87 |
124 |
98 |
300 |
| Corax N375 |
96 |
114 |
96 |
300 |
| |
CTAB |
Oilabsorption |
Oilabsorption of compressed sample |
Sieve Residue |
| |
m²/g |
ml/100g |
ml/100g |
ppm max |
| Corax N 539 |
41 |
111 |
82 |
300 |
| Corax N 550 |
42 |
121 |
86 |
300 |
| Corax N 650 |
36 |
122 |
84 |
300 |
| Corax N 660 |
38 |
90 |
74 |
300 |
| Corax N 683 |
39 |
133 |
88 |
300 |
| Corax N 772 |
33 |
65 |
60 |
300 |
| Corax N 774 |
33 |
72 |
62 |
300 |
| |
CTAB |
Oilabsorption |
Oilabsorption of compressed sample |
Sieve Residue |
| |
m²/g |
ml/100g |
ml/100g |
ppm max |
| Corax HP 160 |
160 |
128 |
100 |
300 |
| Durex 0 |
18 |
- |
64 |
100 |
| CK 3 |
88 |
104 |
- |
300 |
| Purex HS 25 |
29 |
130 |
79 |
20 |
| Purex HS 40 |
41 |
111 |
82 |
20 |
| Purex HS 45 |
41 |
121 |
87 |
20 |
| Purex LS 35 |
33 |
48 |
46 |
20 |
| Printex L 6 |
136 |
119 |
105 |
250 |
| Printex XE 2 |
600 |
380 |
325 |
500 |