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SBR
1.Product Introduction
KOSYN SBR is a cold emulsion copolymer of styrene and butadiene. It is one of the most widely used synthetic rubbers, produced in the UIsan synthetic rubber plant.
KOSYN SBR provides excellent uniformity and cleanliness. Proper compounding is expected to give higher resistance to abrasion and heat compared with natural rubber. Its extrusion properties exceed those of natural rubber, and stocks have less tendency to scorch in processing.
KOSYN SBR is classified by the applied emulsifier, extender oil and stabilizer. Our main products are KOSYN 1500, 1500S, 1502LL, 1502, 1507L, 1507H, 1712L, 1712L, 1712C, 1712, 1712H, 1721, 1724 and 1778K.
2.Product Application
Tire tread, Footwear, Hoses, Rubberized cloth, Conveyor belts, Other mechanical goods.
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| This product is used for adhesive, sealant, etc and a lot of rubber products including tire, shoes, rubber hose, belting, etc. |
| Item / Grade |
1500 |
1500S |
1502LL |
1502 |
1507L |
1507 |
1507H |
1712L |
1712C |
1712 |
1712H |
1721 |
1724 |
1778K |
| Bound Styrene (%) |
23.5 |
40 |
23.5 |
Exten
derOil |
Type |
- |
Aromatic |
Naphthenic |
| Amount (wt%) |
- |
37.5 |
50 |
37.5 |
| Raw MV(ML1+4, 100℃) |
52 |
52 |
44 |
52 |
30 |
35 |
40 |
35 |
46 |
49 |
53 |
54 |
53*71 |
46 |
| Stabilizer |
Staning |
Non-Staining |
Staining |
Non-Stain |
| Emulsifier |
RosinSoap |
Mixed Soap of Rosin Acid and Fatty Acid |
| Coagulant |
Salt-Acid |
| Specific Gravity |
0.93 |
0.93 |
0.94 |
0.94 |
0.94 |
0.94 |
0.94 |
0.95 |
0.95 |
0.95 |
0.95 |
0.97 |
0.98 |
0.92 |
| Compounded Properties |
*1) |
*1) |
*1) |
*1) |
*1) |
*1) |
*1) |
*2) |
*2) |
*2) |
*2) |
*2) |
*3) |
*2) |
CompoundProperties
(ML1+4, 100℃) |
82 |
81 |
75 |
80 |
60 |
64 |
71 |
62 |
59 |
63 |
65 |
68 |
60 |
67 |
| Rheometer (160℃, ARC±1) |
|
| ML(1bf.in |
15.1 |
15.6 |
14.3 |
15.4 |
11.7 |
12.3 |
12.8 |
11.1 |
12.3 |
13.5 |
13.6 |
12.7 |
12.7 |
13.5 |
| MH(1bf.in) |
49.8 |
49.2 |
49.6 |
51.7 |
47.6 |
47.9 |
47.6 |
34.7 |
35.6 |
37 |
37.4 |
35.5 |
35.1 |
36 |
| ts1(min) |
4.8 |
5.1 |
4.4 |
4.5 |
4.7 |
4.2 |
4.7 |
5.9 |
6.3 |
5.8 |
6.1 |
6.5 |
6.7 |
5.7 |
| t'50(min) |
12.8 |
11.3 |
10.5 |
9.5 |
11.6 |
10.6 |
11.6 |
10.2 |
10.6 |
9.9 |
10.7 |
11.3 |
11.5 |
11.3 |
| t'90(min) |
22 |
20.1 |
19.5 |
18 |
20.6 |
19.5 |
20.6 |
17.6 |
18.4 |
17.2 |
18.3 |
19 |
19.5 |
20 |
| Vulcanization Properties*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
*4) |
| 300% Modulus (kgf) |
167 |
161 |
185 |
206 |
167 |
172 |
183 |
102 |
104 |
108 |
110 |
108 |
107 |
129 |
| Tensile Strength (kgf/?) |
300 |
305 |
293 |
300 |
279 |
284 |
290 |
233 |
232 |
243 |
243 |
240 |
232 |
221 |
| Elongation (%) |
500 |
510 |
430 |
410 |
470 |
470 |
460 |
590 |
570 |
580 |
570 |
600 |
570 |
460 |
| Hardness (Shore-A) |
72 |
72 |
72 |
72 |
71 |
71 |
71 |
63 |
63 |
63 |
63 |
65 |
66 |
60 |
| Tear Resistance (B-Type,kg/cm) |
54 |
54 |
50 |
52 |
50 |
50 |
51 |
41 |
42 |
42 |
43 |
44 |
44 |
45 |
| Compression Set |
51 |
52 |
47 |
49 |
50 |
51 |
52 |
53 |
50 |
51 |
49 |
50 |
50 |
35 |
| (100℃×70Hrs, 25% def.,%) |
| Flex Crack Resistance *5) |
3×103 |
3×103 |
3×103 |
3×103 |
4×103 |
4×103 |
4×103 |
4×103 |
10×103 |
10×103 |
10×103 |
9×103 |
10×103 |
10×103 |
| Abrasion Loss*6) |
0.2 |
0.2 |
0.2 |
0.2 |
0.18 |
0.19 |
0.2 |
0.14 |
0.15 |
0.15 |
0.17 |
0.19 |
0.19 |
0.17 |
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