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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.

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, ARC1)
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
(10070Hrs, 25% def.,%)
Flex Crack Resistance *5) 3103 3103 3103 3103 4103 4103 4103 4103 10103 10103 10103 9103 10103 10103
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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