Styrene-butadiene Rubber
Chemical Name: Styrene Butadiene Rubber
Process: Low-temperature emulsion polymerization
Properties: The shelf life of SBR is longer because of its good stability. The property of SBR is similar to that of natural rubber. It will appear physical and chemical change, while its oxidization is slow under the effect of light, heat, oxygen and ozone. More filling agents can be added in SBR and hardly affect the physical and mechanical properties of SBR, therefore SBR is fit for the production of rubber products with lower content of rubber. The low temperature resistance and resilience of SBR is not as good as natural rubber, but SBR is better than natural rubber as for antifriction, heat-proof, oil-proof and resistance to aging.
Applications: SBR 1500 is used for tyre , sidewall rubber, general back rubber, line belt, rubber hose, sole and other black rubber products without any limits of excellent physical properties, pollution and color. SBR 1502 is used for white sidewall rubber, hosepipe, shoes, sole, rubber fabric and clothes, toys and black and colorful products with excellent physical properties and no pollution.
Package: packed in 35kg bags, 17.5MT/20#FCL
Shipping and Storage: SBR should be trimly piled up with certain space in stack. The height of stack is not higher than the thickness of 10 pieces of rubbers. It should be stored in a drafty, clean and dry warehouse at ambient temperature, to avoid drench, pollution and direct radiation of sunlight. It also avoids strongly direct radiation of sunlight and soak of rainwater while transportation.
Specifications
ITEM |
INDEX |
1500 |
1502 |
Superior
grade |
Grade 1 |
On-spec |
Superior
grade |
Grade-1 |
+
On-spec
|
Volatile <= matter, % |
0.75 |
1.00 |
1.30 |
0.60 |
0.75 |
0.90 |
Total ash, % <= |
1.00 |
1.50 |
1.50 |
0.50 |
Organic acids, % |
5.00-7.25 |
5.00-7.25 |
5.00-7.25 |
4.50-6.75 |
Soap, % |
0.50 |
0.50 |
0.50 |
0.50 |
Binding styrene, % <= |
22.5-24.5 |
22.5-24.5 |
22.5-24.5 |
22.5-24.5 |
Mooney viscosity of green
rubber,Ml100 .c 1+4 <= |
46-58 |
46-59 |
46-60 |
45-55 |
44-56 |
Mooney viscosity of
milling rubber, Ml100 .c 1+4 |
85 |
85 |
85 |
93 |
300% stress of directional elongation oriented stretch stress, mpa,25min
35min(145 .c *35min)
50min(145 .c *50min) |
7.1-11.6
11.3-15.8
13.2-17.7 |
5.9-11.8
10.3-16.2
12.3-18.1 |
9.8-16.7 |
M + 2.0
20.6 + 2.0
21.5 + 2.0 |
M + 2.5
20.6 + 2.5
21.5 + 2.5 |
Tensile strength, Mpa 35min >= 145 .c *35min |
22.1 |
21.1 |
21.1 |
25.5 |
24.5 |
Extensibility ,% 35 min >= 145 .c *35min |
480 |
481 |
482 |
340 |
330 |
|
