This document summarizes the properties and benefits of KLAREX RG 223, a carbon black product suitable for critical extrusion applications like weather stripping and hoses. KLAREX RG 223 has excellent cleanliness, improved processing characteristics, and lower rejection rates. It provides longer filter life, superior extrudate surface finish with lower defect counts compared to ASTM N550 and international competitors. KLAREX RG 223 delivers dimensionally stable, smooth extrudates and comparable mechanical properties to alternatives at lower cost due to higher throughput and less scrap.

1. Unleashing the power of Carbon
Corporate office: Ruby House. 8, India Exchange Place, 2nd Floor, Kolkata 700 001, West Bengal, India
Tel: +91 33 2230-4363/9953 | E-mail: carbonblack@himadri.com
Properties
Iodine Number
(g/kg)
OAN
(cc/100g)
Ash Content
%
Sieve Residue
@ 325 mesh (ppm)
Test Method ASTM D1510 ASTM D2414 ASTM D1506 ASTM D1514
Typical
Value
42 123 <0.3 ≤15
KLAREX RG 223
KLAREX RG 223 is suitable for critical
extrusion market, specifically for applications
like weather stripping, hoses and profiles with
much superior quality in comparison with
ASTM N550.
Mechanical Rubber Goods (MRG)
PRODUCT BROCHURE
Key Features & Analytical Properties
KLAREX RG 223 has the following features:
 Excellent cleanliness
 Improved processing characteristics
 Low rejection as ‘scrap’ during manufacturing operation
 Improved dimensional stability in compounds

2. Provides longer filter life
 KLAREX RG 223 tested in industrial production condition
 Significantly longer filter mesh life observed
 2X better than competition  3.5X better than N550
Extrudate Tape Defect Count Analysis
 KLAREX RG 223 tapes show superior surface finish
compared to N550 (indicated by its low visible
defect count)
Mechanical Properties of EPDM Compound
 Tensile strength, % Elongation at break and Modulus at various extensions of KLAREX RG 223 are
comparable to N550 and International Competition delivering a dimensionally stable, very smooth
extrudate surface
 Compression Set [D 395 (Method B), 70°C, 24 hrs] of KLAREX RG 223 is 13.1 compared to 13.3 for N550
Cleanliness
KLAREX RG 223 has the following features:
 Sieve Residue of KLAREX RG 223 is substantially less
than ASTM N550 at various fineness
 This delivers improved surface finish required for the
most demanding applications
KLAREX RG 223 N550
Tape
Defect
Count
>200µ
150-200µ
100-150µ
700
600
500
400
300
200
100
0
Extrudate Tape Defect Count Analysis
240
220
200
180
160
140
120
100
5
4
3
2
1
0
KLAREX RG 223 Competition
ASTM N550
Strainer
Head
Pressure
Time (Hrs.)
100
75
50
25
0
Cleanliness – KLAREX RG 223
N550 KLAREX
RG 223
International
Competition
Sieve Residue #325 mesh Sieve Residue #100 mesh
Corporate office: Ruby House. 8, India Exchange Place, 2nd Floor, Kolkata 700 001, West Bengal, India
Tel: +91 33 2230-4363/9953 | E-mail: carbonblack@himadri.com
Conclusion
 Grit level and Ash content of KLAREX RG 223 is much lower than ASTM N550, which has led to
excellent surface finish of the extruded profiles.
 The compound throughput of KLAREX RG 223 is substantially higher than ASTM N550. This is
expected to translate to substantially lower in-process scrap generation and increased productivity
 KLAREX RG 223 show substantially lower defect counts in extrudate tape, which will translate to much
superior extrudate surface finish and defect free profile surface at the shop floor conditions