Songhan Plastic Technology Co.,Ltd.

KKPC KOSYN KBR 31 Polybutadiene Rubber (High cis BR)

Category Polymer , Thermoset , Rubber or Thermoset Elastomer (TSE)
Manufacturer Korea Kumho Petrochemical Co., Ltd.
Trade Name KOSYN
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF KKPC KOSYN KBR 31 Polybutadiene Rubber (High cis BR).pdf
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Material Notes:
Polybutadiene Rubber (High cis BR)Characteristics: KBR 31 contains an aromatic oil additive. Polybutadiene Rubber (BR), which has three kinds of bond structure of cis-1,4, trans-1,4, vinyl, is simple polymer made from 1,3-butadiene by solution polymerization, and it is classified to High cis BR and Low cis BR according to the cis-1,4 content. High cis BR containing over 94% cis-1,4 is superior in abrasion resistance, elasticity, age resistance and water resistance. As the secondary transition temperature is about -100? low, it is most widely utilized together with SBR.Applications: Conveyor belting, tires (superior for snow tire tread).Additional Notes: Extender Oil: 37.5; AromaticStabilizer: Non-Pollutingcis-1,4 Contents: 95%Volatile Matter: 0.3%Ash Content: 0.1%This product is so sensitive to sunlight and humidity that it can be tarnished and caused deterioration of quality if exposed. It is recommended to store it in cool and shady area lest it should be exposed to direct sunlight. Do not expose to incompatible materials or contaminants.Data provided by Korea Kumho Petrochemical Co., Ltd.
Physical Properties Metric English Comments
Density 0.930 g/cc
0.0336 lb/in³
Not Compounded
Mooney Viscosity 35

@Temperature 100 °C

@Temperature 212 °F
Raw; ML1+4

@Temperature 100 °C

@Temperature 212 °F
Compounded; ML1+4; KOSYN KBR31 137.5, ZnO 3, Stearic Acid 2, HAF Black (IRB#6) 82.5, Accelerator TBBS 1.24, Sulfur 1.5 Total: 227.7
Mechanical Properties Metric English Comments
Hardness, Shore A 57
Cured; JIS-A
Tensile Strength, Ultimate 18.8 MPa
2730 psi
Elongation at Break 640 %
640 %
300% Modulus 0.00804 GPa
1.17 ksi
Rebound 47 %
47 %
Flex Crack Resistance 6000
De Mettia Flexometer Cut Growth: 2mm --> 15mm, Flexes
Tear Strength 69.6 kN/m
398 pli
Abrasion 0.0040
Akron type Tester (cc/1000rev)
Compression Set 4.0 %
4.0 %
Permanent Set
13 %

@Temperature 70.0 °C
13 %

@Temperature 158 °F
70°C / 22 hrs, 25%, def
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